SERVICE MANUAL. Indoor Unit. RAS-24J2KVG-E RAS-24J2KVG-TR ... * No limitation while fan speed MANUAL mode is in stability. * A: When Tsc ≥ 24, A is 24, and when Tsc...
FILE NO. SVM-19002
SERVICE MANUAL
Indoor Unit
RAS-24J2KVG-E RAS-24J2KVG-TR RAS-24J2KVG-UA RAS-24J2KVG-EE
SPLIT TYPE
Outdoor Unit
RAS-24J2AVG-E RAS-24J2AVG-TR RAS-24J2AVG-UA RAS-24J2AVG-EE
R32
January, 2019
CONTENTS
FILE NO. SVM-19002
1. SAFETY PRECAUTIONS .......................................................................... 3 2. SPECIFICATIONS ..................................................................................... 6 3. REFRIGERANT R32 .................................................................................. 9 4. CONSTRUCTION VIEWS ........................................................................ 17 5. WIRING DIAGRAM .................................................................................. 19 6. SPECIFICATIONS OF ELECTRICAL PARTS ......................................... 20 7. REFRIGERANT CYCLE DIAGRAM ........................................................ 21 8. CONTROL BLOCK DIAGRAM ................................................................ 23 9. OPERATION DESCRIPTION ................................................................... 25 10. INSTALLATION PROCEDURE ................................................................ 49 11. HOW TO DIAGNOSE THE TROUBLE ...................................................... 65 12. HOW TO REPLACE THE MAIN PARTS ................................................... 92 13. EXPLODED VIEWS AND PARTS LIST ................................................. 108
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1. SAFETY PRECAUTIONS
FILE NO. SVM-19002
Read the precautions in this manual carefully before operating the unit.
Information included in the Operation Manual and/or Installation Manual.
This appliance is fi lled with R32. (Flammable Material)
Service personnel should be handing this equipment with reference to the Installation Manual.
For general public use Power supply cord and connecting cable of appliance use shall be at least polychloroprene sheathed fl exible cord (design H07RN-F) or cord designation 60245 IEC66. (Shall be installed in accordance with national wiring regulations.)
· Read this "SAFETY PRECAUTIONS" carefully before servicing. · The precautions described below include the important items regarding safety. Observe them without fail. · After the servicing work, perform a trial operation to check for any problem. · Turn off the main power supply switch (or breaker) before the unit maintenance.
Important information regarding the refrigerant used This product contains fluorinated greenhouse gases covered by the Kyoto Protocol. Do not vent gases into the atmosphere. Refrigerant type: R32 GWP(1) value: 675* (1)GWP = global warming potential The refrigerant quantity is indicated on the unit name plate.
* This value is based on F gas regulation 517/2014CAUTION
CAUTION
New Refrigerant Air Conditioner Installation · THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R32) WHICH DOES NOT
DESTROY OZONE LAYER. R32 refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working pressure of R32 refrigerant is approx. 1.6 times of refrigerant R22. Accompanied with the adoption of the new refrigerant, the refrigeration machine oil has also been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigeration machine oil does not enter into the new type refrigerant R32 air conditioner circuit. To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging port on main unit and installation tools are different from those used for the conventional refrigerant units. Accordingly, special tools are required for the new refrigerant (R32) units. For connecting pipes, use new and clean piping materials with high pressure fittings made for R32 only, so that water and/or dust does not enter. Moreover, do not use the existing piping because there are some problems with pressure fittings and possible impurities in existing piping.
CAUTION
TO DISCONNECT THE APPLIANCE FROM THE MAIN POWER SUPPLY This appliance must be connected to the main power supply by a circuit breaker or a switch with a contact separation of at least 3 mm.
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FILE NO. SVM-19002
DANGER
· ASK AN AUTHORIZED DEALER OR QUALIFIED INSTALLATION PROFESSIONAL TO INSTALL/MAINTAIN THE AIR CONDITIONER. INAPPROPRIATE SERVICING MAY RESULT IN WATER LEAKAGE, ELECTRIC SHOCK OR FIRE.
· TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK. MAKE SURE ALL POWER SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.
DANGER: HIGH VOLTAGE
The high voltage circuit is incorporated. Be careful to do the check service, as the electric shock may be caused in case of touching parts on the P.C. board by hand.
· CORRECTLY CONNECT THE CONNECTING CABLE. IF THE CONNECTING CABLE IS INCORRECTLY CONNECTED, ELECTRIC PARTS MAY BE DAMAGED.
· CHECK THAT THE EARTH WIRE IS NOT BROKEN OR DISCONNECTED BEFORE SERVICE AND INSTALLATION. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.
· DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.
· TO PREVENT THE INDOOR UNIT FROM OVERHEATING AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEAT REGISTORS, FURNACE, STOVES, ETC.
· WHEN MOVING THE AIR-CONDITIONER FOR INSTALLATION IN ANOTHER PLACE, BE VERY CAREFUL NOT TO ALLOW THE SPECIFIED REFRIGERANT (R410A) TO BECOME MIXED WITH ANY OTHER GASEOUS BODY INTO THE REFRIGERATION CIRCUIT. IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CIRCUIT WILL BECOME ABNORMALLY HIGH AND IT MAY RESULT IN THE PIPE BURSTING AND POSSIBLE PERSONNEL INJURIES.
· IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE SERVICE WORK AND THE INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT GAS IS HEATED, SUCH AS BY FIRE, GENERATION OF POISONOUS GAS MAY RESULT.
WARNING
· Never modify this unit by removing any of the safety guards or bypass any of the safety interlock switches.
· Do not install in a place which cannot bear the weight of the unit. Personal injury and property damage can result if the unit falls.
· After the installation work, confirm that refrigerant gas does not leak. If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas may generate.
· The electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make sure the air conditioner uses an exclusive circuit. An insufficient circuit capacity or inappropriate installation may cause fire.
· When wiring, use the specified cables and connect the terminals securely to prevent external forces applied to the cable from affecting the terminals.
· Be sure to provide grounding. Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone cables.
· Conform to the regulations of the local electric company when wiring the power supply. Inappropriate grounding may cause electric shock.
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FILE NO. SVM-19002
· Do not pierce or burn as the appliance is pressurized. Do not expose the appliance to heat, flame, sparks, or other sources or ignition. Else, it may explode and cause injury or death.
· For R32 model, use pipes, flare nut and tools which is specified for R32 refrigerant. Using of existing (R22) piping, fl are nut and tools may cause abnormally high pressure in the refrigerant cycle (piping), and possibly result in explosion and injury.
· Thickness of copper pipes used R32 must be more than 0.8mm. Never use copper pipes thinner than 0.8mm. · After completion of installation or service, confirm there is no leakage of refrigerant gas. It may generate
toxic gas when the refrigerant contacts with fire. · Comply with national gas regulations.
CAUTION
· Exposure of unit to water or other moisture before installation may result in an electrical short. Do not store in a wet basement or expose to rain or water.
· Do not install in a place that can increase the vibration of the unit. Do not install in a place that can amplify the noise level of the unit or where noise or discharged air might disturb neighbors.
· To avoid personal injury, be careful when handling parts with sharp edges. · Perform the specified installation work to guard against an earthquake.
If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.
For Reference: If a heating operation would be continuously performed for a long time under the condition that the outdoor temperature is 0°C or lower, drainage of defrosted water may be difficult due to freezing of the bottom plate, resulting in a trouble of the cabinet or fan. It is recommended to procure an antifreeze heater locally for a safe installation of the air conditioner. For details, contact the dealer.
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FILE NO. SVM-19002
2. SPECIFICATIONS
2.1 Specification
Unit model
Indoor
Outdoor
Cooling capacity
Cooling capacity range
Heating capacity
Heating capacity range
Power supply
Electric
Indoor
characteristic
Outdoor
COP (Cooling / Heating)
Operating
Indoor
noise
Indoor unit
Outdoor Unit model Dimension
Outdoor unit
Net weight Fan motor output Air flow rate Unit model Dimension
Net weight Compressor
Operation mode Running current Power consumption Power factor Operation mode Running current Power consumption Power factor Starting current
High Medium Low
(Cooling / Heating) (Cooling / Heating) (Cooling / Heating) (Cooling / Heating)
Height Width Depth
(Cooling / Heating)
Height Width Depth
Motor output Type
(kW) (kW) (kW) (kW)
(A) (W) (%)
(A) (W) (%) (A)
(dB-A) (dB-A) (dB-A) (dB-A)
(mm) (mm) (mm)
(kg) (W) (m3 / min)
(mm) (mm) (mm)
(kg) (W)
Model
Fan motor output
Air flow rate
(Cooling / Heating)
Piping
Type
connection
Indoor unit
Liquid side
Gas side
Outdoor unit
Liquid side
Gas side
Maximum length
Maximum charge-less length
Maximum height difference
Refrigerant
Name of refrigerant
Weight
Wiring
Power supply
connection
Interconnection
Usable temperature range
Indoor
(Cooling / Heating)
Outdoor (Cooling / Heating)
Accessory
Indoor unit
Installation plate
Wireless remote controller
Batteries
Remote controller holder
Toshiba IAQ filter
Mounting screw
Remote controller holder Flat head wood screw
Installation manual
Owner's manual
(W) (m3 / min)
(mm) (mm) (mm) (mm)
(m) (m) (m)
(kg)
(oC) (C)
* The specification may be subject to change without notice for purpose of improvement.
RAS-24J2KVG-E, -TR, -UA
RAS-24J2AVG-E, -TR, -UA
6.50
1.60-7.20
7.00
1.60-8.10
1Ph/50Hz/220-240V
Cooling
Heating
0.36-0.34
0.36-0.34
50
50
62
62
Cooling
Heating
10.19-9.36
9.44-8.66
2200
2050
98
98
10.55-9.70
9.80-9.00
2.89/3.33
48/43
42/39
35/35
55/55
RAS-24J2KVG-E, -TR, -UA
320
1050
250
14
30
17.9/14.4
RAS-24J2AVG-E, -TR, -UA
550
780
290
38
1050
Twin rotary type with DC-inverter variable speed control
KTN150D42UFZ 43
37/37 Flare connection
6.35 12.70 6.35 12.70
20 15 12 R32 1.08 3 Wires: Includes earth (Outdoor) 4 Wires: Includes earth 21-32/0-28 -15,46/-15,24
1 1 2
1 6( 4x25L)
2( 3.1x16L)
1 1
- 6 -
FILE NO. SVM-19002
Specification
Unit model
Indoor
Outdoor
Cooling capacity
Cooling capacity range
Heating capacity
Heating capacity range
Power supply
Electric
Indoor
characteristic
Outdoor
COP (Cooling / Heating)
Operating
Indoor
noise
Indoor unit
Outdoor Unit model Dimension
Outdoor unit
Net weight Fan motor output Air flow rate Unit model Dimension
Net weight Compressor
Operation mode Running current Power consumption Power factor Operation mode Running current Power consumption Power factor Starting current
High Medium Low
(Cooling / Heating) (Cooling / Heating) (Cooling / Heating) (Cooling / Heating)
Height Width Depth
(Cooling / Heating)
Height Width Depth
Motor output Type
(kW) (kW) (kW) (kW)
(A) (W) (%)
(A) (W) (%) (A)
(dB-A) (dB-A) (dB-A) (dB-A)
(mm) (mm) (mm)
(kg) (W) (m3 / min)
(mm) (mm) (mm)
(kg) (W)
Model
Fan motor output
Air flow rate
(Cooling / Heating)
Piping
Type
connection
Indoor unit
Liquid side
Gas side
Outdoor unit
Liquid side
Gas side
Maximum length
Maximum charge-less length
Maximum height difference
Refrigerant
Name of refrigerant
Weight
Wiring
Power supply
connection
Interconnection
Usable temperature range
Indoor
(Cooling / Heating)
Outdoor (Cooling / Heating)
Accessory
Indoor unit
Installation plate
Wireless remote controller
Batteries
Remote controller holder
Toshiba IAQ filter
Mounting screw
Remote controller holder Flat head wood screw
Installation manual
Owner's manual
(W) (m3 / min)
(mm) (mm) (mm) (mm)
(m) (m) (m)
(kg)
(oC) (C)
* The specification may be subject to change without notice for purpose of improvement.
RAS-24J2KVG-EE RAS-24J2AVG-EE
6.90 1.60-7.20
7.20 1.60-8.10 1Ph/50Hz/220-240V Cooling 0.36-0.34 50 62 Cooling 9.74-8.91 2150 97 10.10-9.25 3.21/3.64 48/43 42/39 35/35 55/55 RAS-24J2KVG-EE
320 1050 250
14 30 17.9/14.4 RAS-24J2AVG-EE 550 780 290 38 1050
Heating 0.36-0.34
50 62 Heating 8.94-8.16 1980 97 9.30-8.50
Twin rotary type with DC-inverter variable speed control
KTN150D42UFZ 43
37/37 Flare connection
6.35 12.70 6.35 12.70
20 15 12 R32 1.08 3 Wires: Includes earth (Outdoor) 4 Wires: Includes earth 21-32/0-28 -15,46/-15,24
1 1 2
1 6( 4x25L)
2( 3.1x16L)
1 1
- 7 -
2-2. Operation Characteristic Curve
<Cooling>
Current (A)
12 11 10
9 8 7 6 5 4 3 2 1 0
0
Conditions Indoor : DB 27oC/WB 19oC Outdoor : DB 35oC/WB 24oC Indoor Air Flow : High Pipe Length : 7.5m Voltage : 230V-50Hz
10 20 30 40 50 60 70 80 90
Compressor speed (RPS)
Current (A)
FILE NO. SVM-19002
<Heating>
12 11 10
9 8 7 6 5 4 3 2 1 0
0
Conditions Indoor : DB 20oC/WB 15oC Outdoor : DB 7oC/WB 6oC Indoor Air Flow : High Pipe Length : 7.5m Voltage : 230V-50Hz
10 20 30 40 50 60 70 80 90 100
Compressor speed (RPS)
2-3. Capacity Variation ratio According to Temperature.
<Cooling>
<Heating>
Capacity (%)
130
120
110
100
90
80
70 Capacity ratio:100%= 6.5kW
60
50
40
30
Conditions
20
Indoor : DB 27oC/WB 19oC
Outdoor : DB 35oC/WB 24oC
10
Indoor Air Flow : High
Pipe Length : 7.5m
0 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46
Outside Temperature ( oC)
Heating Capacity ratio (%)
120.0
100.0
80.0
60.0
40.0
20.0
0.0 -15
Capacity ratio:100%= 7.0kW
Conditions Indoor : DB 20oC/WB 15oC Outdoor : DB 7oC/WB 6oC Indoor Air Flow : High Pipe Length : 7.5m Voltage : 230V-50Hz
-10
-5
0
5
10
Outside Temperature ( ºC)
- 8 -
FILE NO. SVM-19002
3. REFRIGERANT R32
This air conditioner adopts the new refrigerant HFC (R32) which does not damage the ozone layer.
The next section describes the precautions for air conditioner using the new refrigerant. Conforming to contents of the next section together with the general cautions included in this manual, perform the correct and safe work.
3-1. Safety During Installation/Servicing
The basic installation servicing work procedures are the same as conventional R410A models. As R32's pressure is about 1.6 times higher than that of R22, improper installation/servicing may cause a serious trouble. By using tools and materi-als exclusive for R32, it is necessary to carry out installation/ servicing safely while taking the following precautions into consideration.
1. Never use refrigerant other than R32 in an air conditioner which is designed to operate with R32. If other refrigerant than R32 is mixed, pressure in the refrigeration cycle becomes abnormally high, and it may cause personal injury, etc. by a rupture.
2. Confirm the used refrigerant name, and use tools and materials exclusive for the refrigerant. The refrigerant name R32 is indicated on the visible place of the outdoor unit of the air conditioner using R32 as refrigerant. To prevent mischarging, the diameter of the service port differs from that of R22. R32 and other HFCs are heavier than air, and therefore they are inclined to settle near the floor surface. If the gas fills up the room or the bottom part of a room, it may also cause oxygen deficiency and may reach its combustion concentration. In order to prevent oxygen deficiency and R32 combustion, keep the room well-ventilated for a healthy work environment. In particular, using HFCs in a basement room or confined area creates a higher risk; be sure to furnish the room with local exhaust ventilation. If a refrigerant leak is confirmed in a room an inadequately ventilated location, do not use a flame until the area has been ventilated appropriately and the work environment has been improved. The same applies in case of brazing, ensure appropriate ventilation to prevent oxygen deficiency and R32 combustion. Check that there are no dangerous or combustible items nearby, and ensure a fire extinguisher is close at hand. Keep a sufficient distance away from causes of fire (ignition sources) such as gas-burning equipment and electric heaters in places where installation, repairs, or similar work on air-conditioning equipment is performed.
3. If a refrigeration gas leakage occurs during installation/servicing, be sure to ventilate fully. If the refrigerant gas comes into contact with fire, a poisonous gas may occur.
4. When installing or removing an air conditioner, do
not allow air moisture dust or oil to remain in the
refrigeration cycle. Otherwise, pressure in
the refrigeration cycle may become abnormally high
so that a rupture or personal injury may be caused.
5. After completion of installation work, check to make sure that there is no refrigeration gas leakage. If the refrigerant gas leaks into the room, coming into contact with fire in the fan-driven heater, space heater, etc., a poisonous gas may occur
6. When an air conditioning system charged with a large volume of refrigerant is installed in a small room, it is necessary to exercise care so that, even when refrigerant leaks, its concentration does not exceed the marginal level. If the refrigerant gas leakage occurs and its concentration exceeds the marginal level, an oxygen starvation accident may result.
7. Be sure to carry out installation or removal according to the installation manual. Improper installation may cause refrigeration trouble, water leakage, electric shock, fire, etc.
8. Unauthorized modifications to the air conditioner may be dangerous. If a breakdown occurs please call a qualified air conditioner technician or electrician. Improper repair's may result in water leakage, electric shock and fire, etc.
3-2. Refrigerant Piping Installation
3-2-1. Piping Materials and Joints Used
For the refrigerant piping installation, copper pipes and joints are mainly used. Copper pipes and joints suitable for the refrigerant must be chosen and installed. Furthermore, it is necessary to use clean copper pipes and joints whose interior surfaces are less affected by contaminants.
1. Copper Pipes
It is necessary to use seamless copper pipes which are made of either copper or copper alloy and it is desirable that the amount of residual oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed or discolored portion (especially on the interior surface).
Otherwise, the expansion valve or capillary tube may become blocked with contaminants.
As an air conditioner using R32 incurs pres-sure higher than when using R22, it is necessary to choose adequate materials.
Thicknesses of copper pipes used with R32 are as shown in Table 3-2-1. Never use copper pipes thinner than 0.8 mm even when it is available on the market.
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FILE NO. SVM-19002
Table 3-2-1 Thicknesses of annealed copper pipes
Nominal diameter 1/4 3/8 1/2 5/8
Outer diameter (mm) 6.35 9.52 12.70 15.88
Thickness (mm)
R32(R410A)
R22
0.80
0.80
0.80
0.80
0.80
0.80
1.00
1.00
2. Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare Joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm. In such a case, socket joints can be used. Sizes of flare pipe ends, flare joint ends and flare nuts are as shown in Tables 3-2-3 to 3-2-6 below. b) Socket Joints Socket joints are such that they are brazed for connections, and used mainly for thick pipings whose diameter is larger than 20 mm. Thicknesses of socket joints are as shown in Table 3-2-2.
Table 3-2-2 Minimum thicknesses of socket joints
Nominal diameter
1/4 3/8 1/2 5/8
Reference outer diameter of copper pipe jointed (mm) 6.35
9.52
12.70
15.88
Minimum joint thickness (mm) 0.50
0.60
0.70
0.80
3-2-2. Processing of Piping Materials
When performing the refrigerant piping installation, care should be taken to ensure that water or dust does not enter the pipe interior, that no other oil than lubricating oils used in the installed air-water heat pump is used, and that refrigerant does not leak. When using lubricating oils in the piping processing, use such lubricating oils whose water content has been removed. When stored, be sure to seal the container with an airtight cap or any other cover.
1. Flare processing procedures and precautions a) Cutting the Pipe By means of a pipe cutter, slowly cut the pipe so that it is not deformed. b) Removing Burrs and Chips If the flared section has chips or burrs, refrigerant leakage may occur. Carefully remove all burrs and clean the cut surface before installation. c) Insertion of Flare Nut
- 10 -
d) Flare Processing
Make certain that a clamp bar and copper pipe have been cleaned.
By means of the clamp bar, perform the flare processing correctly.
Use either a flare tool for R32 or conventional flare tool.
Flare processing dimensions differ according to the type of flare tool. When using a conventional flare tool, be sure to secure "dimension A" by using a gauge for size adjustment.
FILE NO. SVM-19002
ØD A
Fig. 3-2-1 Flare processing dimensions
Nominal diameter
1/4 3/8 1/2 5/8
Table 3-2-3 Dimensions related to flare processing for R32(R410A)
Outer diameter
(mm)
Thickness (mm)
6.35
0.8
9.52
0.8
12.70
0.8
15.88
1.0
Flare tool for R32 clutch type
0 to 0.5 0 to 0.5 0 to 0.5 0 to 0.5
A (mm)
Conventional flare tool
Clutch type
Wing nut type
1.0 to 1.5
1.5 to 2.0
1.0 to 1.5
1.5 to 2.0
1.0 to 1.5
2.0 to 2.5
1.0 to 1.5
2.0 to 2.5
Nominal diameter
1/4 3/8 1/2 5/8
Table 3-2-4 Dimensions related to flare processing for R22
Outer diameter
(mm)
6.35 9.52 12.70 15.88
Thickness (mm)
0.8 0.8 0.8 1.0
Flare tool for R22 clutch type
0 to 0.5 0 to 0.5 0 to 0.5 0 to 0.5
A (mm)
Conventional flare tool
Clutch type
Wing nut type
0.5 to 1.0
1.0 to 1.5
0.5 to 1.0
1.0 to 1.5
0.5 to 1.0
1.5 to 2.0
0.5 to 1.0
1.5 to 2.0
Nominal diameter
1/4 3/8 1/2 5/8
Table 3-2-5 Flare and flare nut dimensions for R32(R410A)
Outer diameter (mm)
6.35 9.52 12.70 15.88
Thickness (mm)
0.8 0.8 0.8 1.0
Dimension (mm)
A
B
C
D
9.1 9.2 6.5 13
13.2 13.5 9.7 20
16.6 16.0 12.9 23
19.7 19.0 16.0 25
Flare nut width (mm)
17 22 26 29
- 11 -
Nominal diameter
1/4 3/8 1/2 5/8 3/4
FILE NO. SVM-19002
Table 3-2-6 Flare and flare nut dimensions for R22
Outer diameter (mm)
6.35 9.52 12.70 15.88 19.05
Thickness (mm)
0.8 0.8 0.8 1.0 1.0
Dimension (mm)
A
B
C
D
9.0 9.2 6.5 13
13.0 13.5 9.7 20
16.2 16.0 12.9 20
19.7 19.0 16.0 23
23.3 24.0 19.2 34
Flare nut width (mm)
17 22 24 27 36
45° to 46°
BA
CD
43° to 45° Fig. 3-2-2 Relations between flare nut and flare seal surface
2. Flare Connecting Procedures and Precautions a) Make sure that the flare and union portions do not have any scar or dust, etc. b) Correctly align the processed flare surface with the union axis. c) Tighten the flare with designated torque by means of a torque wrench. The tightening torque for R32 is the same as that for conventional R22. Incidentally, when the torque is weak, the gas leakage may occur. When it is strong, the flare nut may crack and may be made non-removable. When choosing the tightening torque, comply with values designated by manufacturers. Table 3-2-7 shows reference values.
NOTE : When applying oil to the flare surface, be sure to use oil designated by the manufacturer. If any other oil is used, the lubricating oils may deteriorate and cause the compressor to burn out.
Table 3-2-7 Tightening torque of flare for R32(R410A) [Reference values]
Nominal diameter
1/4 3/8 1/2 5/8
Outer diameter (mm)
6.35 9.52 12.70 15.88
Tightening torque N·m (kgf·cm)
14 to 18 (140 to 180) 33 to 42 (330 to 420) 50 to 62 (500 to 620) 63 to 77 (630 to 770)
Tightening torque of torque wrenches available on the market
N·m (kgf·cm)
16 (160), 18 (180)
42 (420)
55 (550)
65 (650)
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FILE NO. SVM-19002
3-3. Tools
3-3-1. Required Tools
The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R32 is changed to prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions and opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened. The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge, clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types. 1. Tools exclusive for R32 (Those which cannot be used for conventional refrigerant (R22)) 2. Tools exclusive for R32, but can be also used for conventional refrigerant (R22) 3. Tools commonly used for R32 and for conventional refrigerant (R22) The table below shows the tools exclusive for R32 and their interchangeability.
Tools exclusive for R32 (The following tools for R410A are required.)
Tools whose specifications are changed for R32 and their interchangeability
No.
Used tool
Usage
R32(R410A) air-water heat pump installation
Existence of Whether conven-
new equipment tional equipment
for R32
can be used
1 Flare tool
Pipe flaring
Yes
*(Note 1)
2
Copper pipe gauge for adjusting projection margin
Flaring by conventional flare tool
Yes
*(Note 1)
3
Torque wrench (For Ø12.7)
Connection of flare nut
Yes
×
4 Gauge manifold 5 Charge hose
Evacuating, refrigerant charge, run check, etc.
Yes
×
6 Vacuum pump adapter Vacuum evacuating
Yes
×
7
Electronic balance for refrigerant charging
Refrigerant charge
Yes
×
8 Leakage detector
Gas leakage check
Yes
×
Conventional air-water heat pump installation Whether new equipment can be used with conventional refrigerant
¡
*(Note 1)
×
×
¡ ¡ ¡
(Note 1) When flaring is carried out for R32(R410A) using the conventional flare tools, adjustment of projection margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.
General tools (Conventional tools can be used.)
In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary as the general tools.
1. Vacuum pump Use vacuum pump by attaching vacuum pump adapter.
2. Torque wrench (For Ø6.35, Ø9.52)
3. Pipe cutter
4. Reamer 5. Pipe bender 6. Level vial 7. Screwdriver (+, ) 8. Spanner or Monkey wrench
9. Hole core drill (Ø65) 10. Hexagon wrench
(Opposite side 4mm) 11. Tape measure 12. Metal saw
Also prepare the following equipments for other installation method and run check.
1. Clamp meter
3. Insulation resistance tester
2. Thermometer
4. Electroscope
- 13 -
FILE NO. SVM-19002
3-4. Recharging of Refrigerant
When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps.
Recover the refrigerant, and check no refrigerant remains in the equipment.
Connect the charge hose to packed valve service port at the outdoor unit's gas side.
Connect the charge hose to the vacuum pump adapter.
When the compound gauge's pointer has indicated 0.1 Mpa (76 cmHg), place the handle Low in the fully closed position, and turn off the vacuum pump's power switch.
Keep the status as it is for 1 to 2 minutes, and ensure that the compound gauge's pointer does not return.
Open fully both packed valves at liquid and gas sides.
Place the handle of the gauge manifold Low in the fully opened position, and turn on the vacuum pump's power switch. Then, evacuating the refrigerant in the cycle.
Set the refrigerant cylinder to the electronic balance, connect the connecting hose to the cylinder and the connecting port of the electronic balance, and charge liquid refrigerant.
(For refrigerant charging, see the figure below.)
1. Never charge refrigerant exceeding the specified amount.
2. If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.
3. Do not carry out additional charging.
When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the refrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the specified amount is charged, and working pressure in the refrigeration cycle becomes abnormally high pressure, and may cause a rupture or personal injury.
(Indoor unit)
(Outdoor unit) Opened
Refrigerant cylinder (with siphon)
Check valve
Opened Open/close valve for charging
Closed
Opened
Electronic balance for refrigerant charging
Service port
Fig. 3-4-1 Configuration of refrigerant charging
- 14 -
FILE NO. SVM-19002
1. Be sure to make setting so that liquid can be charged. 2. When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.
Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the cylinder upside down if cylinder is not equipped with siphon.
[ Cylinder with siphon ]
Gauge manifold
OUTDOOR unit
[ Cylinder without siphon ]
Gauge manifold
OUTDOOR unit
Refrigerant cylinder
Refrigerant cylinder
Electronic balance
Electronic balance
Siphon
Fig. 3-4-2
3-5. Brazing of Pipes
3-5-1. Materials for Brazing
1. Silver brazing filler Silver brazing filler is an alloy mainly composed of silver and copper. It is used to join iron, copper or copper alloy, and is relatively expensive though it excels in solderability.
2. Phosphor bronze brazing filler Phosphor bronze brazing filler is generally used to join copper or copper alloy.
3. Low temperature brazing filler Low temperature brazing filler is generally called solder, and is an alloy of tin and lead. Since it is weak in adhesive strength, do not use it for refrigerant pipes.
1. Phosphor bronze brazing filler tends to react with sulfur and produce a fragile compound water solution, which may cause a gas leakage. Therefore, use any other type of brazing filler at a hot spring resort, etc., and coat the surface with a paint.
2. When performing brazing again at time of servicing, use the same type of brazing filler.
3-5-2. Flux
1. Reason why flux is necessary · By removing the oxide film and any foreign matter on the metal surface, it assists the flow of brazing filler. · In the brazing process, it prevents the metal surface from being oxidized. · By reducing the brazing filler's surface tension, the brazing filler adheres better to the treated metal.
- 15 -
2. Characteristics required for flux
· Activated temperature of flux coincides with the brazing temperature.
· Due to a wide effective temperature range, flux is hard to carbonize.
· It is easy to remove slag after brazing.
· The corrosive action to the treated metal and brazing filler is minimum.
· It excels in coating performance and is harmless to the human body.
As the flux works in a complicated manner as described above, it is necessary to select an adequate type of flux according to the type and shape of treated metal, type of brazing filler and brazing method, etc.
3. Types of flux
· Noncorrosive flux
Generally, it is a compound of borax and boric acid. It is effective in case where the brazing temperature is higher than 800°C.
· Activated flux
Most of fluxes generally used for silver brazing are this type. It features an increased oxide film removing capability due to the addition of compounds such as potassium fluoride, potassium chloride and sodium fluoride to the borax-boric acid compound.
4. Piping materials for brazing and used brazing filler/flux
Piping material Used brazing filler
Copper - Copper Phosphor copper
Copper - Iron
Silver
Iron - Iron
Silver
Used flux Do not use Paste flux Vapor flux
1. Do not enter flux into the refrigeration cycle.
2. When chlorine contained in the flux remains within the pipe, the lubricating oil deteriorates. Therefore, use a flux which does not contain chlorine.
3. When adding water to the flux, use water which does not contain chlorine (e.g. distilled water or ion-exchange water).
4. Remove the flux after brazing.
FILE NO. SVM-19002
3-5-3. Brazing As brazing work requires sophisticated techniques, experiences based upon a theoretical knowledge, it must be performed by a person qualified. In order to prevent the oxide film from occurring in the pipe interior during brazing, it is effective to proceed with brazing while letting dry Nitrogen gas (N2) flow.
Never use gas other than Nitrogen gas.
1. Brazing method to prevent oxidation 1) Attach a reducing valve and a flow-meter to the Nitrogen gas cylinder. 2) Use a copper pipe to direct the piping material, and attach a flow-meter to the cylinder. 3) Apply a seal onto the clearance between the piping material and inserted copper pipe for Nitrogen in order to prevent backflow of the Nitrogen gas. 4) When the Nitrogen gas is flowing, be sure to keep the piping end open. 5) Adjust the flow rate of Nitrogen gas so that it is lower than 0.05 m3/Hr or 0.02 MPa (0.2kgf/cm2) by means of the reducing valve. 6) After performing the steps above, keep the Nitrogen gas flowing until the pipe cools down to a certain extent (temperature at which pipes are touchable with hands). 7) Remove the flux completely after brazing.
M Flow meter
Nitrogen gas cylinder
Stop valve From Nitrogen cylinder
Pipe
Nitrogen gas Rubber plug
Fig. 3-5-1 Prevention of oxidation during brazing
- 16 -
4-1. Indoor Unit
FILE NO. SVM-19002
4. CONSTRUCTION VIEWS
1050
Front Panel
Grille Inlet
Air Inlet
Air Filter
250
320
8 73.5
8 73.5
50 Knock Out System
Heat Exchanger
Air Outlet
50 Knock Out System
110
50
50
50 71.5
42 222 126
71.5 50
Installation plate hanger
213
219
213
140
73.5
58 17.5 Wireless remote controller
64.5
25 Remote controller holder
Drain hose (0.4m) Installation plate hanger
Connecting pipe (0.39m) (Flare 12.70)
525
Installation plate hanger
Connecting pipe (0.49m) (Flare 6.35)
85 Hanger
786
235
235
215
215
23 For stud bold ( 6) For stud bold ( 8~ 10)
320 40
65 65
47 215.5
Hanger 262.5
Installation plate outline
Outline of indoor unit
40
Center line 262.5
Hanger 153.5 109
- 17 -
320 306
340 320
86
4-2. Outdoor Unit (Unit : mm)
600
50 36
R15
A 28
108 125
Ø6 hole R5.5
A detail Drawing (Back leg)
Ø25 Drain outlet
FAN-GUARD
Ø 436
2- Ø11 x 14 Hole (For Ø8 -Ø10 anchor bolt)
80 320 306
FILE NO. SVM-19002
Ø6 hole Ø11x14 hole
36
R15
50
B Detail Drawing (Front leg)
COVER-PV Z
550 275
290
90
600
320
90 69
342
320 137 92
100 or more
Z View
600 Air intlel
600 or more
100 or more
Air outlel
600 or more
Installation dimension
- 18 -
54
Liquid side (Flare Ø 6.35) Gas side (Flare 12.7)
Service port
5. WIRING DIAGRAM
FILE NO. SVM-19002
- 19 -
FILE NO. SVM-19002
6. SPECIFICATIONS OF ELECTRICAL PARTS
6-1. Indoor Unit
No.
Parts name
1 Fan Motor (for indoor)
2 Room temp. sensor (TA-sensor) 3 Heat exchanger temp. sensor (TC-sensor) 4 Louver motor (Horizontal)
Type ICF-340-30-6
(-) (-) 24BYJ48-ST
Specificat DC-340V, 42W
10k at 25°C 10k at 25°C Output (Rated) 4 phase, DC12V
6-2. Outdoor Unit
No.
Parts name
1 Compressor
2 Fan Motor
3 Pulse Modulating Valve (PMV) coil
4 4-Way valve coil
5 Reactor
6 Suction temp. sensor
(TS sensor)
7 Discharge temp. sensor
(TD sensor)
8 Outside air temp. sensor
(TO sensor)
9 Heat Exchanger temp. sensor (TE sensor)
10 Terminal block
Type name KTN150D42UFZ WDF-340-A43-1 PQ-M10012-000313 SQ-A2522G-000352 CH-57-Z-T (Inverter attached) (Inverter attached) (Inverter attached) (Inverter attached) JX0-5B
Specifications 3-Phases (6-Poles) ; 1185W DC 140-340V ; 43W DC 12V AC 220-240V L = 8.88-10.01mH, 16A 10k at 25°C 62k at 20°C 10k at 25°C 10k at 25°C AC 250V, 20A
- 20 -
FILE NO. SVM-19002
7. REFRIGERANT CYCLE DIAGRAM
7-1. Refrigerant Cycle Diagram
P Pressure measurement Gauge attaching port Vacuum pump connecting port
Deoxidized copper pipe Outer dia. : 12.7mm Thickness : 0.8mm
INDOOR UNIT Indoor heat exchanger
T1 Temp. measurement
TC
Cross flow fan
TA
Deoxidized copper pipe Outer dia. : 6.35mm Thickness : 0.8mm
Sectional shape of heat insulator
Allowable height difference : 12m Allowable pipe length
Max. : 20m Min. : 2m Chargeless : 12m
4-way valve
Suc-Tank
Strainer
TS Temp. measurement T2
Muffler
TD
Compressor KTN150D42UFZ
Outdoor heat exchanger
Split capillary TO
TE Propeller fan
OUTDOOR UNIT
Pulse Modulating valve at liquid side Strainer
Refrigerant amount : 1.08kg
NOTE :
Gas leak check position Refrigerant flow (Cooling) Refrigerant flow (Heating)
- 21 -
FILE NO. SVM-19002
7.2 Operation Data
<Cooling>
Tempeature Model name
condition(°C) RAS-
Indoor Outdoor
27/19
35/- 24J2KVG-E
24J2KVG-TR 24J2KVG-UA
24J2KVG-EE
Standard pressure P (MPa)
0.9 to 1.0
Heat exchanger pipe temp.
T1 (°C) T2 (°C)
10 to 11 50 to 52
Indoor fan mode
High
Outdoor Compressor Connecting
fan mode revolution Piping
(rps)
(m)
High
82
7.5
<Heating>
Tempeature Model name
condition(°C) RAS-
Indoor Outdoor
20/-
7/6 24J2KVG-E
24J2KVG-TR
24J2KVG-UA
24J2KVG-EE
Standard pressure P (MPa)
2.8 to 3.0
Heat exchanger Indoor pipe temp. fan mode
T1 (°C) T2 (°C)
42 to 44 0 to 1
High
Outdoor Compressor Connecting
fan mode revolution Piping
(rps)
(m)
High
85
7.5
NOTES :
1. Measure surface temperature of heat exchanger pipe around center of heat exchanger path U bent. (Thermistor thermometer)
- 22 -
8-1. Indoor Unit
FILE NO. SVM-19002 8. CONTROL BLOCK DIAGRAM
Heat Exchanger Sensor Temperature Sensor
Infrared Rays Signal Receiver
Infrared Rays
36.7KHz
Initiallizing Circuit
Clock Frequency Oscillator Circuit
Indoor Unit Control Panel
Functions · Louver Control
M.C.U
· 3-minute Delay at Restart for Compressor
· Motor Revolution Control
· Processing (Temperature Processing)
· Timer
· LED brightness dim
· Serial Signal Communication
Remote Control
Power Supply Circuit
Noise Filter
Louver ON/OFF Signal Louver Driver
Serial Signal Transmitter/Receiver
Operation Display Timer Display
Hi-Power Display ECO Display Wi-Fi Display Indoor Fan Motor
Louver Motor
Power Supply (From Outdoor Unit)
REMOTE CONTROL
Serial Signal Communication
Remote Control
Infrared Rays
Operation ( ) Operation Mode Selection AUTO, COOL, DRY, HEAT, FAN ONLY
Temperature Setting Fan Speed Selection OFF TIMER Setting Louver Auto Swing Louver Direction Setting
ECO Hi-POWER SILENT operation
- 23 -
- 24 -
For INDOOR UNIT 220240V ~50Hz 220-230V ~60Hz
MICRO-COMPUTER BLOCK DIAGRAM
Discharge temp. sensor
Outdoor air temp. sensor
Suction temp. sensor
Heat exchanger temp.sensor
Indoor unit send/receive
circuit
WP-030 (P.C.B)
M.C.U
· PWM synthesis function · Input current release control · IPM over-current detect control · Outdoor fan control · High power factor correction control · Inverter output frequency control · A/D converter function · P.M.V. control · Discharge temp. control · 4-way valve control · Signal communication to indoor unit
Noise Filter
High Power factor Correction
circuit
High current Detector
Clock frequency 10MHz
Converter (AC DC)
Current detect
Current detect
Inverter (DC AC)
Driver circuit of P.M.V.
Drrive circuit
P.M.V.
4-way valve
Inverter (DC AC)
P.M.V. : Pulse Motor Valve M.C.U. : Micro Control Unit
OUTDOOR UNIT
Outdoor Fan motor
Compressor
8-2. Outdoor Unit (Inverter Assembly)
FILE NO. SVM-19002
FILE NO. SVM-19002
9. OPERATION DESCRIPTION
9-1. Outline of Air Conditioner Control
This air conditioner is a capacity-variable type air conditioner. Its system can control the speed of compressor motor according to load. The drive circuit for the indoor motor is mounted in the indoor unit. The drive circuits for outdoor motor and compressor are mounted in the outdoor unit.
The entire air conditioner is mainly controlled by the indoor unit controller. The indoor unit controller drives the indoor fan motor based upon command sent from the remote controller. Moreover, it also determines required speed of compressor motor and then transfers the operation command to the outdoor unit controller.
The outdoor unit controller erceives operation command from the indoor unit and controls revolution speed of the compressor motor. The outdoor unit controller controls speed of compressor motor be controlling output voltage of the inverter and switching timing of supply power (current transfer timing), so that compressor motor operates according to the operation command. And then, the outdoor unit controller transfers the operating status back to the indoor unit controller.
As the compressor adopts four-pole brushless DC motor, the frequency of the supply power from inverter to compressor is two-times cycles of the actual number of revolution.
1. Role of indoor unit controller The indoor unit controller judges the operation commands from the remote controller and assumes the following functions. · Judgment of suction air temperature of the indoor heat exchanger by using the indoor temp. sensor. (TA sensor) · Judgment of the indoor heat exchanger temperature by using heat exchanger sensor (TC sensor) (Prevent-freezing control, etc.) · Louver motor control · Indoor fan motor operation control · LED (Light Emitting Diode) display control · Transferring of operation command signal (Serial signal) to the outdoor unit · Reception of information of operation status (Serial signal including outside temp. data) from the outdoor unit and judgment/display of error
2. Role of outdoor unit controller Receiving the operation command signal (Serial signal) from the indoor unit controller, the outdoor unit performs compressor operation control as followed to judgment of serial signal from indoor side.
· Detection of inverter input current and current release operation
· Over-current detection and prevention operation to IGBT module (Compressor stop function)
· Compressor and outdoor fan stop function when serial signal is off (when the serial signal does not reach the board assembly of outdoor control by trouble of the signal system)
· Transferring of operation information (Serial signal) from outdoor unit controller to indoor unit controller
· Detection of outdoor temperature and operation revolution control
· Defrost control in heating operation (Temp. measurement by outdoor heat exchanger and control for 4-way valve and outdoor fan)
3. Contents of operation command signal (Serial signal) from indoor unit controller to outdoor unit controller The following three types of signals are sent from the indoor unit controller. · Operation mode set on the remote controller · Compressor revolution command signal defined by indoor temperature and set temperature (Correction along with variation of room temperature and correction of indoor heat exchanger temperature are added.) · Temperature of indoor heat exchanger · For these signals ([Operation mode] and [Compressor revolution] indoor heat exchanger temperature), the outdoor unit controller monitors the input current to the inverter, and performs the followed operation within the range that current does not exceed the allowable value.
4. Contents of operation command signal (Serial signal) from outdoor unit controller to indoor unit controller The following signals are sent from the outdoor unit controller. · The current operation mode · The current compressor revolution · Outdoor temperature · Existence of protective circuit operation For transferring of these signals, the indoor unit controller monitors the contents of signals, and judges existence of trouble occurrence. Contents of judgment are described below. · Whether distinction of the current operation status meets to the operation command signal · Whether protective circuit operates When no signal is received from the outdoor unit controller, it is assumed as a trouble.
- 25 -
FILE NO. SVM-19002
9-2. Operation Description 1. Basic operation ........................................................................................................... 27 1. Operation control ................................................................................................... 27 2. Cooling/Heating operation ..................................................................................... 28 3. AUTO operation .....................................................................................................28 4. DRY operation ........................................................................................................ 28 2. Indoor fan motor control ............................................................................................. 29 3. Outdoor fan motor control ........................................................................................... 31 4. Capacity control .......................................................................................................... 32 5. Current release control ............................................................................................... 32 6. Release protective control by temperature of indoor heat exchanger ........................ 33 7. Defrost control (Only in heating operation) ................................................................ 34 8. Louver control ............................................................................................................. 35 1) Louver position ....................................................................................................... 35 2) Wind direction adjustment ..................................................................................... 35 3) Swing ..................................................................................................................... 35 9. ECO operation ............................................................................................................ 36 10. Temporary operation ................................................................................................... 37 11. Discharge temperature control ................................................................................... 37 12. High pressure control ................................................................................................. 37 13. Pulse Modulating valve (P.M.V.) control ...................................................................... 38 14. Self-Cleaning function ................................................................................................ 39 15. Remote-A or B selection ............................................................................................ 41 16. Hi-POWER Mode ...................................................................................................... 41 17. Display lamp brightness adjustment.. ....................................................................... 42 18. Operation mode selectable ........................................................................................ 42
19. QUIET mode .............................................................................................................. 43 20. Silent Operation ......................................................................................................... 43
9-3. Auto Restart Function.. 9-3-1. How to Set the Auto Restart Function ....................................................................... 44 9-3-2. How to Cancel the Auto Restart Function ................................................................. 45 9-3-3. Power Failure During Timer Operation .................................................................... 45
9-4. Remote Controller and Its Fuctions 9-4-1. Parts Name of Remote Controller .............................................................................. 46 9-4-2. Operation of remote control ....................................................................................... 46 9-4-3. Name and Functions of Indications on Remote Controller ......................................... 48
- 26 -
FILE NO. SVM-19002
Item
Operation flow and applicable data, etc.
Description
1. Basic operation
1. Operation control
Receiving the user's operation condition setup, the operation statuses of indoor/outdoor units are controlled. 1) The operation conditions are selected by the remote controller as shown in the below. 2) A signal is sent by ON button of the remote controller. 3) The signal is received by a sensor of the indoor unit and processed by the indoor controllers as
shown in the below. 4) The indoor controller controls the indoor fan motor and louver motor. 5) The indoor controller sends the operation command to the outdoor controller, and sends/receives
the control status with a serial signal. 6) The outdoor controller controls the operation as shown in the left, and also controls the compres-
sor, outdoor fan motor, 4-way valve and pulse Modulating valve.
Selection of operation conditions
ON/OFF
Remote controller
Control contents of remote controller
· ON/OFF (Air conditioner)
· Operation select (COOL/HEAT/AUTO/DRY)
· Temperature setup
· Swing
· Air volume select (AUTO/LOW/LOW+/MED/MED+/HIGH)
· ECO
· Silent operation
· ON timer setup
· QUIET
· OFF timer setup
· Hi-POWER
Signal receiving Indoor unit control Operation command Serial signal send/receive
Indoor unit
Indoor unit control · Command signal generating function of
indoor unit operation · Calculation function (temperature calculation) · Activation compensation function of indoor fan · Cold draft preventive function · Timer function · Indoor heat exchanger release control
· Indoor fan motor · Louver motor
Serial signal send/receive Outdoor unit control
~
Outdoor unit
Outdoor unit control · Frequency control of inverter output · Waveform composite function · Calculation function
(Temperature calculation) · AD conversion function · Quick heating function · Delay function of compressor reactivation · Current release function · GTr over-current preventive function · Defrost operation function
Inverter
· Compressor · Outdoor fan motor · 4-way valve · Pulse Modulating valve
(P.M.V.)
- 27 -
FILE NO. SVM-19002
Item
Operation flow and applicable data, etc.
Description
1. Basic operation
2. Cooling/Heating operation
The operations are performed in the following parts by controls according to cooling/heating conditions. 1) Receiving the operation ON signal of the remote controller, the cooling or heating operation signal
starts being transferred form the indoor controller to the outdoor unit. 2) At the indoor unit side, the indoor fan is operated according to the contents of "2. Indoor fan
motor control" and the louver according to the contents of "9. Louver control", respectively. 3) The outdoor unit controls the outdoor fan motor, compressor, pulse Modulating valve and
4-way valve according to the operation signal sent from the indoor unit.
Operation ON
Setup of remote controller
Indoor unit control
Indoor fan motor control / Louver control / Operation Hz Control (Requierment)
Sending of operation command signal
Outdoor unit control
Compressor revolution control / Outdoor fan motor control /
Operation Hz control (Include limit control)
[ ] 4-way valve control In cooling operation: OFF In heating operation: ON Pulse Modulating valve control
3. AUTO operation
Selection of operation mode As shown in the following figure, the operation starts by selecting automatically the status of room temperature (Ta) when starting AUTO operation.
*1. When reselecting the operation mode, the fan speed is controlled by the previous operation mode.
Ta Ts + 1 Ts 1
Cooling operation Monitoring (Fan) Heating operation
1) Detects the room temperature (Ta) when the operation started.
2) Selects an operation mode from Ta in the left figure.
3) Fan operation continues until an operation mode is selected.
4) When AUTO operation has started within 2 hours after heating operation stopped and if the room temperature is 20°C or more, the fan operation is performed with "Super Ultra LOW" mode for 3 minutes. Then, select an operation mode.
5) If the status of compressor-OFF continues for 15 minutes the room temperature after selecting an operation mode (COOL/HEAT), reselect an operation mode.
4. DRY operation
1) Detects the room temperature (Ta) when
DRY operation is performed according to the difference
the DRY operation started.
between room temperature and the setup temperature as 2) Starts operation under conditions in the
shown below.
left figure according to the temperature
In DRY operation, fan speed is controlled in order to prevent lowering of the room temperature and to avoid air flow from blowing directly to persons.
difference between the room temperature and the setup temperature (Tsc). Setup temperature (Tsc) = Set temperature on remote controller
(Ts) + (0.0 to 1.0)
[°C] Ta
L (W5)
3) When the room temperature is lower 1°C or less than the setup temperature,
turn off the compressor.
+1.0
(W5+W3) / 2
+0.5 Tsc
SUL (W3) Fan speed
- 28 -
Item
Operation flow and applicable data, etc.
2. Indoor fan motor control
<In cooling operation>
(This operation controls the fan speed at indoor unit side.)
The indoor fan (cross flow fan) is operated by the phasecontrol induction motor. The fan rotates in 5 stages in MANUAL mode, and in 5 stages in AUTO mode, respectively. (Table 1)
COOL ON
Fan speed setup
AUTO
Ta [°C] +2.5 +2.0 a +1.5 b +1.0 c +0.5 d Tsc e
MANUAL
Indication L L+ M M+ H
Air volume AUTO
(Fig. 1) Fan speed
W7 (L + M) / 2
WA (M + H) / 2
WD
(Fig. 2)
M+(WC) *3 *4 *5
L(W7)
*3 : Fan speed = (M + L) x 3/4 + L *4 : Fan speed = (M + L) x 2/4 + L *5 : Fan speed = (M + L) x 1/4 + L
(Linear approximation from M+ and L)
FILE NO. SVM-19002
Description
* Symbols
UH : Ultra High
H
: High
M+ : Medium+
M
: Medium
L+
: Low+
L
: Low
L-
: Low
UL : Ultra Low
SUL : Super Ultra Low
* The fan speed broadly varies due to position of the louver, etc. The described value indicates one under condition of inclining downward blowing.
1) When setting the fan speed to L, L+, M, M+ or H on the remote controller, the operation is performed with the constant speed shown in Fig. 1.
2) When setting the fan speed to AUTO on the remote controller, revolution of the fan motor is controlled to the fan speed level shown in Fig. 2 and Table 1 according to the setup temperature, room temperature, and heat exchanger temperature.
(Table 1) Indoor fan air flow rate
Fan speed level
WF WE WD WC WB WA W9 W8 W7 W6 W5 W4 W3 W2 W1
Made Cool Heat Dry
UH
UH H
H M+ UH
M+
H
M+ M+
M
M+
L+
L+ L L+
L L-
L-
L
UL UL L-
UL
SUL
SUL
SUL
RAS-24J2KVG-E, -TR, -UA, -EE
Cooling
Heating
Fan speed Air flow rate Fan speed Air flow rate
(rpm)
m3/hr
(rpm)
m3/hr
1130
1086
950
865
1130
1086
950
865
1120
1074
900
776
980
902
900
776
950
865
870
767
930
841
870
767
930
841
850
743
850
743
790
669
790
669
710
571
710
571
710
571
630
473
640
487
630
473
640
487
550
374
550
374
520
338
520
338
500
313
500
313
- 29 -
FILE NO. SVM-19002
Item
Operation flow and applicable data, etc.
2. Indoor fan
<In heating operation>
motor control
HEAT ON
Fan speed setup
MANUAL
(Fig. 3)
AUTO
Indication L L+ M M+ H
Fan speed W8
(L + M) / 2 WA
(M + H) / 2 WE
TC 42°C
YES
Min air flow rate control
NO
Tc
52 51
Limited to Min WD tap
(Fig. 4)
42 41
* Fan speed = (TC
*
No limit
W8) + W8
Description
1) When setting the fan speed to L, L+, M, M+ or H on the remote controller, the operation is performed with the constant speed shown in Fig. 3 and Table 1.
2) When setting the fan speed to AUTO on the remote controller, revolution of the fan motor is controlled to the fan speed level shown in Fig. 5 according to the set temperature and room temperature.
3) Min air flow rate is controlled by temperature of the indoor heat exchanger (Tc) as shown in Fig. 4.
4) Cold draft prevention, the fan speed is controlled by temperature of the indoor heat exchanger (Tc) as shown in Fig. 6.
5) In order to prevent Cold draft when compressor step during heating operation. Then louver will move to upper position and fan speed will reduce or off.
Cold draft preventive control
Basic fan control
TA [°C] TSC b 0.5 c 1.0 d 1.5 e 2.0 f 2.5 g
Fan speed AUTO L+ (W9)
*1 *2
*3
5.0
M+ (WD)
5.5
H (WE)
*1: Fan speed = (M + -L+) x 1 4 + L+ *2: Fan speed = (M + -L+) x 2 4 + L+ *3: Fan speed = (M + -L+) x 3 4 + L+ (Calculated with linear approximation from M+ and L+)
(Fig. 5)
Tc
46
46
34
45
45
33
33 32
*A+4
*A-4
33 32
*A+4
*A-4
21 20
*A+4
*A-4
H (WE) Line-approximate H and SUL with Tc.
SUL (W2) Stop
Fan speed MANUAL in starting Fan speed AUTO in stability Fan speed AUTO in starting
* No limitation while fan speed MANUAL mode is in stability. * A: When Tsc 24, A is 24, and when Tsc < 24, A is Tsc
Tsc: Set value
(Fig. 6)
[In starting and in stability]
In starting
In stability
· Until 12 minutes passed after operation start
· When 12 to 25 minutes passed after operation start
FAN AUTO · When 12 to 25 minutes passed after operation
and room temp. is higher than (set temp. 3°C)
start and room temp. is 3°C or lower than set temp. · When 25 minutes or more passed after operation start
FAN Manual · Room temp. < Set temp. 4°C
· Room temp. Set temp. 3.5°C
- 30 -
FILE NO. SVM-19002
Item
Operation flow and applicable data, etc.
Description
3. Outdoor fan motor control
The blowing air volume at the outdoor unit side is controlled.
Receiving the operation command from the controller of indoor unit, the controller of outdoor unit controls fan speed.
* For the fan motor, a DC motor with non-stage variable speed system is used. However, it is limited to 8 stages for reasons of controlling.
Air conditioner ON (Remote controller)
Indoor unit controller
1) Outdoor unit operation command (Outdoor fan control)
2) Fan speed 400 YES
OFF status of
when the motor stopped.
fan motor continues.
1) The operation command sent from the remote controller is processed by the indoor unit controller and transferred to the controller of the outdoor unit.
2) When strong wind blows at outdoor side, the operation of air conditioner continues with the fan motor stopped.
3) Whether the fan is locked or not is detected, and the operation of air conditioner stops and an alarm is displayed if the fan is locked.
4) According to each operation mode, by the conditions of outdoor temperature (To) and compressor revolution, the speed of the outdoor fan shown in the table is selected.
NO
Fan motor ON
3) Fan lock NO
YES Air conditioner OFF
4) Motor operates as shown in the table below.
~ 31.7
Alarm display
Model Name
RAS-24J2AVG-E, -TR, -UA, -EE
Fan Speed Ranges
To 38C
To 28C
To
To 15C To 5.5C
To 0C
To < 0C
When To is abnormal
Cooling Operation
Compressor Speeds (rps)
Hz < 16.8
16.8 Hz < 37.2
37.2 Hz
Min Max Min Max Min Max
f6
fB
f8
fE
fA
fE
f5
fA
f7
fE
f9
fE
f3
f7
f5
f9
f7
fB
f2
f5
f4
f7
f6
f9
f1
f3
f3
f5
f4
f7
f1
f2
f2
f4
f3
f5
OFF
fB
OFF
fE
f1
fE
Model Name RAS-24J2AVG-E, -TR, -UA, -EE
To 10C To To < 10C
To < 5C To < -3C When To is abnormal
Heating Operation
Compressor Speeds (rps)
Hz < 21.0 21.0 Hz < 42.0 42.0 Hz
f7
f8
f9
f9
fB
fE
fE
fE
fE
fE
fE
fE
fF
fF
fF
Outdoor Fan Speeds (rpm)
Tap RAS-24J2AVG-E, -TR, -UA, -EE
f1
300
f2
300
f3
300
f4
360
f5
450
f6
500
f7
550
f8
600
f9
650
fA
700
fB
700
fC
800
fD
900
fE
980
fF
980
- 31 -
FILE NO. SVM-19002
Item
Operation flow and applicable data, etc.
Description
4. Capacity control
The cooling or heating capacity depending on the load is adjusted.
According to difference between the setup value of temperature and the room temperature, the capacity is adjusted by the compressor revolution.
Remote controller Set temp. (Ts)
Indoor unit Room temp. (Ta)
Ts Ta
Correction of Hz signal
Detection of electromotive force of compressor motor winding
Detection of motor speed and rotor position Correction value of Hz signal Operating Hz
Inverter output change Commutation timing change
1) The difference between set temperature on remote controller (Ts) and room temperature (Ta) is calculated.
2) According to the temperature difference, the correction value of Hz signal which determines the compressor speed is set up.
3) The rotating position and speed of the motor are detected by the electromotive force occurred on the motor winding with operation of the compressor.
4) According to the difference resulted from comparison of the correction value of Hz signal with the present operation Hz, the inverter output and the commutation timing are varied.
5) Change the compressor motor speed by outputting power to the compressor.
* The contents of control operation are same in cooling operation and heating operation
Change of compressor speed
5. Current release This function prevents troubles on the electronic parts of the
control
compressor driving inverter.
This function also controls drive circuit of the compressor speed so that electric power of the compressor drive circuit does not exceed the specified value.
Outdoor unit inverter main circuit control current
Outdoor temp. To Setup of current release point
Operating current Setup value
Low
High
Capacity control continues.
Reduce compressor speed Current decrease
1) The input current of the outdoor unit is detected in the inverter section of the outdoor unit.
2) According to the detected outdoor temperature, the specified value of the current is selected.
3) Whether the current value exceeds the specified value or not is judged.
4) If the current value exceeds the specified value, this function reduces the compressor speed and controls speed up to the closest one commanded from the indoor unit within the range which does not exceed the specified value.
Current Release Value (A) Mode Outdoor temperature: To (°C)
RAS-24J2AVG-E, -TR, -UA, -EE
To 45
10.0
Cooling
45 > To 40
10.8
To < 40
11.3
To 16
12.0
Heating
16 > To 11
11.5
To < 11
11.0
- 32 -
FILE NO. SVM-19002
Item
Operation flow and applicable data, etc.
6. Release protective control by temperature of indoor heat exchanger
<In cooling/dry operation>
(Prevent-freezing control for indoor heat exchanger)
In cooling/dry operation, the sensor of indoor heat exchanger detects evaporation temperature and controls the compressor speed so that temperature of the heat exchanger does not exceed the specified value.
Usual cooling capacity control
R
7°C
When the value is
Q
in Q zone, the compressor speed
6°C
is kept.
P 5°C
Description
1) When temperature of the indoor heat exchanger drops below 5°C, the compressor speed is reduced. (P zone)
2) When temperature of the indoor heat exchanger rises in the range from 6°C to under 7°C, the compressor speed is kept. (Q zone)
3) When temperature of the indoor heat exchanger rises to 7°C or higher, the capacity control operation returns to the usual control in cooling operation. (R zone)
Reduction of compressor speed
Indoor heat exchanger temperature
55°C 52°C 48°C
<In heating operation> (Prevent-overpressure control for refrigerating cycle) In heating operation, the sensor of indoor heat exchanger detects condensation temperature and controls the compressor speed so that temperature of the heat exchanger does not exceed the specified value.
Reduction of compressor speed P
When the value is Q in Q zone, the
compressor speed is kept.
R Usual heating capacity control
1) When temperature of the indoor heat exchanger rises in the range from 52°C to 55°C, the compressor speed is kept. (Q zone)
When temperature of the indoor heat exchanger drops in the range from 48°C to under 55°C, the compressor speed is kept. (Q zone)
2) When temperature of the indoor heat exchanger rises to 55°C or higher, the compressor speed is reduced. (P zone)
3) When temperature of the indoor heat exchanger does not rise to 52°C, or when it drops below to 48°C, the capacity control operation returns to the usual control in heating operation. (R zone)
Indoor heat exchanger temperature
- 33 -
FILE NO. SVM-19002
Item
Operation flow and applicable data, etc.
7. Defrost control (This function removes frost adhered to the outdoor
(Only in heating heat exchanger.)
operation)
The temperature sensor of the outdoor heat ex-
changer (Te sensor) judges the frosting status of the
outdoor heat exchanger and the defrost operation is
performed with 4-way valve reverse defrost system.
Description
The necessity of defrost operation is detected by the outdoor heat exchanger temperature. The conditions to detect the necessity of defrost operation differ in A, B, or C zone each. (Table 1)
Start of heating operation
TE (°C) 0
10
15
c
b
a
d
(min.)
-2 -5
A zone
-10
B zone
D zone
-25 *
C zone
Table 1
* The minimum TE value and To value between 10 and 15 minutes after heating operation has started are stored in memory as TE0 and TO0, respectively.
Defrost zone
In normal To
In abnormal To
A zone
TE0-TE3°C & SH-SH02
(TE0-TE)-(TO0-TO)3°C & SH-SH02
B zone
TE0-TE2°C & SH-SH02
(TE0-TE)-(TO0-TO)2°C & SH-SH02
C zone D zone
TE -25°C & SH-SH02 More than 90 minutes accumulate heating operation time condition TE -2°C
Table 2
Heating operation
Model
(time)
RAS-24J2KVG-E, -TR, -UA, -EE
a
35
b
33
c
31
d
90
<Defrost operation>
· Defrost operation in A to C zones
1) Stop operation of the compressor for 40 seconds.
2) Invert (OFF) 4-way valve 40 seconds after stop of the compressor.
3) The outdoor fan stops at the same time when the compressor stops.
4) When temperature of the indoor heat exchanger becomes 38°C or lower, stop the indoor fan.
<Finish of defrost operation>
· Returning conditions from defrost operation to heating operation
1) Temperature of outdoor heat exchanger rises to +8°C or higher for 3 seconds.
2) Temperature of outdoor heat exchanger is kept at +7°C or higher for 60 seconds.
3) Defrost operation continues for 10 minutes.
<Returning from defrost operation> 1) Stop operation of the compressor for
approx. 40 seconds.
2) Invert (ON) 4-way valve approx. 30 seconds after stop of the compressor.
3) The outdoor fan starts rotating at the same time when the compressor starts.
- 34 -
FILE NO. SVM-19002
Item
Operation flow and applicable data, etc.
8. Louver control This function controls the air direction of the indoor unit.
1) Louver position
· The position is automatically controlled according to the operation mode (COOL/HEAT).
· The set louver position is stored in memory by the microcomputer,
and the louver returns to the stored position when the next operation
is performed. (Cooling/Heating memory position)
The angle of the louver is indicated as the louver closes fully is 0°.
1) Louver position in cooling operation
Cooling operation/ AUTO (COOL)
Description
Initial setting of "Cooling storage position" Louver : Directs downward (40.9°)
2) Louver position in heating operation
Heating operation/ AUTO (HEAT)
Initial setting of "Heating storage position" Louver : Directs downward (80.5°)
2) Air direction adjustment
Horizontal blowing
Inclined blowing
Air direction
Blowing downward
Inclined blowing
Horizontal blowing
· The louver position can be arbitrarily set up by pressing [FIX] button.
3) Swing
· Swing operation is perfor in range 35° with the Fixed position as the center.
· If the swing range exceeded either upper or lower limit position, swing operation is perfomed in range 35° from the limit.
Upper Limit Position.
Swing range 35o
Fixed Position before start swing.
17.5o 17.5o
Lower Limit Position.
Upper Limit Position.
Fixed Position before start swing
Swing range 35o
5o 30o
Lower Limit Position
· Swing When pressing [SWING] button during operation, the louver starts swinging.
- 35 -
FILE NO. SVM-19002
(Room temp. Set temp.) Fan speed depend on presetting and can change every speed.
Item
Operation flow and applicable data, etc.
9. ECO operation
When pressing [ECO] button on the remote controller, a Economic operation is performed.
<Cooling operation>
This function operates the air conditioner with the difference between the set and the room temperature as shown in the following figure.
TA
+6.5 +6.0 +5.5 +5.0 +4.5 +4.0 +3.5 +3.0 +2.5 +2.0 +1.5 +1.0 +0.5
TSC -0.5 -1.0
-2.0
Zone Frequency
12 Dry Max
11
*12
10
*11
9
*10
8
*9
7
*8
6
5
4
3
2
Min
1
Hz
OFF
1H
2H
3H
4H
Time
Description
<Cooling operation>
1) The control target temperature increase 0.5ºC per hour up to 2ºC starting from the set temperature when ECONO has been received.
2) The indoor fan speed is depend on presetting and can change every speed after setting ECO operation.
3) The compressor speed is controlled as shown in the left figure.
0 0.5 1.0 1.5 2.0 2.5 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0
* 12 (DRY max - COOL min) /6 x 5 + COOL min * 11 (DRY max - COOL min) /6 x 4 + COOL min * 10 (DRY max - COOL min) /6 x 3 + COOL min
* 9 (DRY max - COOL min) /6 x 2 + COOL min * 8 (DRY max - COOL min) /6 x 1 + COOL min
<Heating operation>
Hz
24J2KVG-E, -TR, -UA, -EE
Cool min
15
DRY max
35
30 minutes A
Time Compressor speed
0Hz
B
A
A zone
aHz
C
B
B zone
a to cHz
C
C zone cHz
Hz
24J2KVG-E, -TR, -UA, -EE
a
19
c
45
<Heating operation>
1) Setting the compressor speed to Max. aHz, the temperature zone in which the operation can be
performed with Max. cHz is gradually widened after 30 minutes passed when starting ECO operation.
2) The indoor fan speed is depend on presetting and can change every speed after setting ECO
operation.
- 36 -
FILE NO. SVM-19002
Item
Operation flow and applicable data, etc.
Description
10. Temporary operation
Pressing [RESET] button starts the temporary operation of [AUTO] operation. When keeping [RESET] button pressed for 10 seconds or more, the temporary [COOL] operation is performed.
Press RESET button.
Did you press [RESET] button for 3 seconds or more?
YES
Did you press [RESET] button for 10 seconds or more?
NO
NO Temporary [AUTO] operation
YES
Switch to [AUTO RESTART] control.
Temporary [COOL] Operation
1) When pressing [RESET] button, the temporary [AUTO] operation starts.
2) When keeping [RESET] button pressed for 3 seconds or more, Pi, Pi, Pi sound is heard and [AUTO RESTART] control is changed.
3) When keeping [RESET] button pressed for 10 seconds or more, "Pi" sound is heard and the temporary [COOL] operation starts.
4) To stop the temporary operation, press the button again.
11. Discharge temperature control
Td value
Control operation
117°C 115°C 106°C 103°C
96°C
Judges as an error and stops the compressor.
Reduce the compressor speed.
Reduce slowly compressor speed.
Keeps the compressor speed.
If the operation is performed with lower speed than one commanded by the serial signal, speed is slowly raised up to the commanded speed.
Operates with speed commanded by the serial signal.
1. Purpose
This function detects error on the refrigerating cycle or error on the compressor, and performs protective control.
2. Operation
· Control of the compressor speed The speed control is performed as described in the left table based upon the discharge temperature.
12. High pressure control
Cooling Heating (TE) (TC)
63°C 62°C 63°C 57°C 61°C 55°C 59°C 53°C
55°C 49°C
Control operation
1. Purpose This function detects error on the refrigerating cycle or error on the compressor, and performs protective control.
2. Operation - TE or TC sensor control
- Control of the compressor speed The speed control is performed as described in the left table.
- High pressure switch control compressor
are shut down when discharge pressure
(Pd)
reaches
or
exceeds
4.15 +0 -0.3
MPa
- The compressor restart prevention timer
(3 min) is set, and the control terminated.
- 37 -
FILE NO. SVM-19002
Item
Operation flow and applicable data, etc.
Description
13. Pulse Modulating valve (P.M.V.)
control
This function controls throttle amount of the refrigerant in the refrigerating cycle.
According to operating status of the air conditioner, this function also controls the open degree of valve with an expansion valve with pulse Modulation.
Starting up Initialize
Move to initial position
Compressor ON
1) When starting the operation, move the valve once until it fits to the stopper. (Initialize)
* In this time, "Click" sound may be heard.
2) Adjust the open degree of valve by super heat amount. (SH control)
3) If the discharge temperature was excessively up, adjust the open degree of valve so that it is in the range of set temperature. (Discharge temp. control)
4) When defrost operation is performed, the open degree of valve is adjusted according to each setup conditions during preparation for defrost and during defrost operation (4-way valve is inversed.).
5) To turn off the compressor while the air conditioner stops by control of the thermostat or by remote controller, adjust the open degree of valve to the setup value before stop of the compressor.
SH control
Td release control
PMV open degree control
Stop by remote controller
Power OFF
Room temp. sensor (Ta sensor) control
Defrost
* SH (Super Heat amount) = Ts (Temperature of suction pipe of the compressor) Tc or Te (Heat exchanger temperature at evaporation side)
* PMV: Pulse Modulating Valve
- 38 -
FILE NO. SVM-19002
Item
Operation flow and applicable data, etc.
Description
14. Self-Cleaning function Unit now performing cooling or dry operation Press "STOP" button
Only timer indicator lights, and Self Cleaning operation starts
Time set now elapses Operation stops
1. Purpose
The Self-Cleaning operation is to minimize the growth of mold, bacteria etc. by running the fan and drying so as to keep the inside of the air conditioner clean.
Self-Cleaning operation
When the cooling or dry operation shuts down, the unit automatically starts the SelfCleaning operation which is then performed for the specified period based on duration of the operation which was performed prior to the shutdown, after which the Self-Cleaning operation stops. (The Self-Cleaning operation is not performed after a heating operation.)
2. Operation
1) When the stop signal from the remote controller or timer-off function is received, only the timer indicator light.
2) The period of the Self-Cleaning operation is determined by the duration of the operation performed prior to the reception of the stop code.
3) After the Self-Cleaning operation has been performed for the specified period, the unit stops operating.
· During Self-Cleaning operations: The louver opens slightly. The indoor fan operates continuously at a speed of 500 rpm.
Self-Cleaning operation times
Operation time
Up to 10 minutes
Cooling: Auto (cooling) Dry 10 minutes or longer
Self-Cleaning operation time No Self-Cleaning operation performed (0 minutes)
30 mins.
Heating: Auto (heating) Auto (fan only) Shutdown
No Self-Cleaning operation performed
· To stop an ongoing Self-Cleaning operation at any time Press the start/stop button on the remote controller twice during the Self-Cleaning operation. (After pressing the button for the first time, press it for the second time without delay (within 10 minutes).)
- 39 -
FILE NO. SVM-19002
Item
14. Self-Cleaning function
Operation flow and applicable data, etc.
Description
14-1-1. Self-Cleaning diagram
Operation display
ON
FCU fan
ON rpm is depend on presetting.
FCU louver
OPEN
Timer display
ON or OFF depend on presetting of timer function.
Compressor
ON or OFF depend on presetting per room temperature.
CDU fan
ON or OFF depend on presetting per room temperature.
OFF ON (500RPM) OPEN (12.7º) ON
OFF
OFF
OFF OFF CLOSE ON or OFF depend on presetting of timer function. OFF
OFF
Cool mode or dry mode operation more than 10 mins.
Self-Cleaning mode operate 30 mins.
Turn off by remote controller or timer-off function.
Automatically turn-off.
Operation time
14-1-2. Self-Cleaning function release
How to set/cancel Self-Cleaning function To set/cancel the Self-Cleaning function, proceed as follows:
· Setting diagnosis code "06" on remote controlle (See detail of setting diagnosis code in 11-4-1)
· Turn on the power supply to air conditioner, after that press [RESET] button on air conditioner 1 time to turn on the air conditioner (The LED display will show in operation LED) 1
· Take the remote controller to direction of LED display on air conditioner, press button "up" (see detail of setting diagnosis code in 11-4-1) 1 time to send the code "07" *(within 3 sec. after press [RESET] button),* then air conditioner will shutdown automatically. Also, LED display will show flash follow the able below.
· Set or Cancel Self-Cleaning function by push the RESET button on air conditioner. When setting is changed, the sound warning will alarm "Beep". The setting is changed following below.
ON
OFF
ON
OFF
· Turn on air conditioner again by remote controller to confirm setting.
Self-cleaning function
ON
OFF
Operation LED
flash 1 Hz flash 1 Hz
Timer LED
not flash Flash 1 Hz
Note) Table above will show current status of Self-Cleaning function
OPERATION / RESET Button
- 40 -
FILE NO. SVM-19002
Item
Operation flow and applicable data, etc.
Description
15. Remote-A or B selection
Setting the remote controller To separate using of remote control for each indoor unit in case of 2 air conditioner are installed nearly. Remote Control B Setup. 1) Press [RESET] button on the indoor unit to turn
the air conditioner ON. 2) Point the remote control at the indoor unit. 3) Push and hold [CHECK] button on the Remote
Control by the tip of the pencil. "00" will be shown shown on the display (Picture 1 ). 4) Press [MODE] during pushing [CHECK]."B" will show on the display and "00" will disappear and the air conditioner will turn OFF. The Remote Control B is memorized (Picture 2 ).
Note : 1. Repeat above step to reset Remote Control to be A.
2. Remote Control A has not "A" display. 3. Default setting of Remote Control from
factory is A.
1. Purpose This operation is to operate only one indoor unit using one remote controller.
2. Description When operating one indoor unit in a situation where two indoor units have been installed in the same room or nearby rooms, this operation prevents the remote controller signal from being received simultaneously by both units, thus preventing both units from operating.
3. Operation The indoor unit on which the remote controller selection has been set to B receives the signal of the remote controller also set to B. (At the factory the remote controller selection is set to A on all the indoor units. There is no A setting display.)
16. Hi-POWER Mode
([Hi-POWER] button on the remote controller is pressed)
When [Hi-POWER] button is pressed while the indoor unit is in Auto, Cooling or Heating operation, HiPOWER mark is indicated on the display of the remote controller and the unit operates as follows.
1. Automatic operation · The indoor unit operates in according to the current operation.
2. Cooling operation · The preset temperature drops 1ºC (The value of the preset temperature on the remote controller does not change.) The indoor unit's fan speed level increase 1 tap
3. Heating operation · The preset temperature increases 2ºC (The value of the preset temperature on the remote controller does not change.) The indoor unit's fan speed level increase 1 tap
4. The Hi-POWER mode can not be set in Dry operation
- 41 -
FILE NO. SVM-19002
Item
Operation flow and applicable data, etc.
Description
17. Display lamp brightness adjustment
To decrease the display lamp brightness or turn it off.
1. Press and hold
for 3 seconds until brightness level ( , ,
or ) is shown on remote control LCD then release the button.
2. Press
Rise or
Decrease
to adjust brightness in 4 levels.
Remote control LCD
Operation display
Brightness
Lamp illuminates full brightness.
100%
Lamp illuminates 50% brightness.
50%
Lamp illuminates 50% brightness and the operation lamp is turned off.
50%
All lamps are turned off.
All turned off
· In the examples of and , the lamp illuminates for 5 seconds before going off.
18. Operation mode
selectable
Operating system setting
1. Purpose Choosing the operating system as appropriate in real condition
2. Operation Factory default setting prefer "Heat pump" system. Through it is able to cooling only system heating only system or return to factory default.
· Do cut J804 for cooling only system · Do cut J805 for heating only system · Do cut both of J804 and J805 for return
to factory default.
- 42 -
FILE NO. SVM-19002
Item 19. QUIET mode
Operation flow and applicable data, etc.
Description
When the "Quiet mode" selected from [ FAN ] button; - The fan of the indoor unit will be restricted the revolving speed at speed UL. - The compressor speed is controlled as shown in the figure.
Model Cool/Heat min Quiet Cool (Hz) Quiet Heat (Hz)
24J2KVG-E, -TR, -UA, -EE 19 35 44
When is cancel "Quiet mode". The [ FAN ] is selected other speed.
Quiet mode is the system which, control the revolving speed of indoor fan to work constantly at lower than speed L. In addition, noise level of indoor unit is less than usual.
Remarks : 1. Quiet mode is unable to work in dry mode. 2. Quiet mode is appropriate to work with less
cooling load and less heating load condition. Because of the fan speed may not enough the cooling capacity or heating capacity.
20. Silent Operation
Silent button on remote controller is pressed. Silent 1: Cooling/heating capacity is limited maximum for 70% of rated. Only compressor speed is limited.
This function is used when the user need to keep silent at outdoor side. It is limit maximum compressor speed and CDU fan speed. Sound level can be implemented by 1 silent level. Sound level: Rated level > Silent 1 Note: Due to Silent operation reason, In adequate cooling/heating capacity may occur.
Silent Operation description
Models
Silent Operation
Cooling
Compressor
CDU
frequncy Fan Speed
(rps)
(rpm)
Heating
Compressor
CDU
frequncy Fan Speed
(rps)
(rpm)
24J2KVG-E,-TR,-UA,-EE Silent 1
64
normal
70
normal
POWER-SELECTION AND SILENT OPERATION
NORMAL
ECO
SILENT
- 43 -
FILE NO. SVM-19002
9-3. Auto Restart Function
This indoor unit is equipped with an automatic restarting function which allows the unit to restart operating with the set operating conditions in the event of a power supply being accidentally shut down. The operation will resume without warning three minutes after power is restored. This function is not set to work when shipped from the factory. Therefore it is necessary to set it to work.
9-3-1. How to Set the Auto Restart Function To set the auto restart function, proceed as follows: The power supply to the unit must be on ; the function will not set if the power is off. Press the [RESET] button located in the center of the front panel continuously for three seconds. The unit receives the signal and beeps three times. The unit then restarts operating automatically in the event of power supply being accidentally shut down.
· When the unit is standby (Not operating)
Operation
Motions
Press [RESET] button for more than three seconds. (Less than 10 seconds)
OPERATION / RESET Button
The unit is on standby.
The unit starts to operate.
The white indicator is on.
After approx. three seconds,
The unit beeps three times and continues to operate.
The white indicator flashes for 5 seconds.
If the unit is not required to operate at this time, press [RESET] button once more or use the remote controller to turn it off.
· When the unit is in operation
Operation
Motions
Press [RESET] button for more than three seconds. (Less than 10 seconds)
OPERATION / RESET Button
The unit is in operation.
The white indicator is on.
The unit stops operating.
The white indicator is turned off.
After approx. three seconds,
The unit beeps three times.
The white indicator flashes for 5 seconds.
If the unit is required to operate at this time, press [RESET] button once more or use the remote controller to turn it on.
· While the filter check indicator is on, the RESET button has the function of filter reset betton.
- 44 -
FILE NO. SVM-19002
9-3-2. How to Cancel the Auto Restart Function To cancel auto restart function, proceed as follows : Repeat the setting procedure : the unit receives the signal and beeps three times. The unit will be required to be turned on with the remote controller after the main power supply is turned off.
· When the system is on stand-by (not operating)
Operation
Motions
Press [RESET] button for more than The unit is on standby.
three seconds. (Less than 10 seconds)
The unit starts to operate.
The white indicator is on.
After approx. three seconds,
The unit beeps three times and continues to operate.
If the unit is not required to operate at this time, press [RESET] button once more or use the remote controller to turn it off.
OPERATION / RESET Button
· When the system is operating
Operation
Motions
Press [RESET] button for more than three seconds. (Less than 10 seconds)
The unit is in operation.
The white indicator is on.
The unit stops operating.
The white indicator is turned off.
After approx. three seconds,
The unit beeps three times.
If the unit is required to operate at this time, press [RESET] button once more or use the remote controller to turn it on.
OPERATION / RESET Button
9-3-3. Power Failure During Timer Operation
When the unit is turned off because of power failure during timer operation, the timer operation is cancelled. In that case, set the timer operation again.
NOTE : The Daily Timer is reset while a command signal can be received from the remote controller even if it stopped due to a power failure.
- 45 -
FILE NO. SVM-19002
9-4. Remote Controller and Its Fuctions
9-4-1. Parts Name of Remoe Controller
1 Infrared signal emitter 2 Start/Stop button 3 Mode select button (MODE) 4 Temperature button (TEMP) 5 Fan speed button (FAN) 6 Swing louver button (SWING) 7 Set louver button (FIX) 8 Off timer button (OFF) 9 High power button (Hi-POWER) 1180 ECO/SILENT button (ECO/SILENT) 1191 Clear button (CLEAR) 12 Check button (CHECK)
1
MODE
3
2 7 9 8 #
Hi POWER ECO
SILENT OFF
4
6 5 ! "
9-4-2. Operation of remote control
1. AUTOMATIC OPERATION To automatically select cooling, heating or fan only operation. 1. Press MODE : Select A. 2. Press : Set the desired temperature. Min. 17°C, Max. 30°C. 3. Press FAN : Select AUTO, LOW , LOW+ , MED , MED+ , HIGH
, or QUIET .
2. COOLING / HEATING / FAN ONLY OPERATION
1. Press MODE : Select Cool , Heat , or Fan only .
2. Press : Set the desired temperature. Min. 17°C, Max. 30°C. Cooling / Heating : Min 17°C - Max 30°C, Fan Only: No temperature indication
3. Press FAN : Select AUTO, LOW , LOW+ , MED , MED+ , HIGH
, or QUIET .
3. DRY OPERATION (COOLING ONLY) For dehumidification, a moderate cooling performance is controlled automatically. 1. Press MODE : Select Dry .
2. Press : Set the desired temperature. Min. 17°C, Max. 30°C Note: Dry Mode fan speed is set to Auto only.
4. Hi-POWER OPERATION To automatically control room temperature and airflow for faster cooling or heating operation (except in DRY and FAN ONLY mode).
Press : Start and stop the operation.
Note: Hi-POWER operation symbol will appear on remote control display.
- 46 -
FILE NO. SVM-19002
5. ECO / SILENT OPERATION
ECO OPERATION To automatically control room temperature to save energy (Except in DRY and FAN ONLY mode) Note: Cooling operation; the set temperature will increase automatically 1 degree/hour for 2 hours
(maximum 2 degree increase). For Heating operation the set temperature will decrease.
SILENT OPERATION
To reduce outdoor sound level during operation (Except in DRY and FAN ONLY mode)
Note: Though operating silently, the Heating or Cooling capacity is still prioritized to ensure having sufficient comfort inside the room.
ECO and SILENT operation setting
Press
: Start and stop the operation.
NORMAL
ECO
SILENT
Note: ECO and SILENT operation symbol will appear on remote control display.
6. TIMER OPERATION To automatically control room to save energy (except in DRY and FAN ONLY mode)
1 Press
Setting the OFF timer for enter OFF timer setting.
2 Press 3 Press 4 Press
for select desired OFF timer. (0.5 - 12 hrs) for set OFF timer. again for cancel OFF timer.
Note: TIMER OPERATION symbol will appear on remote control display.
7. TEMPORARY OPERATION In case of the misplaced or discharged remote control
· Pressing the RESET button, the unit can start or stop without using the remote control.
· Operation mode is set on AUTOMATIC operation, preset temperature is 24°C and fan operation is automatic speed.
8.AUTO RESTART OPERATION To automatically restart the conditioner after the power failure (Power of the unit must be on.) Setting 1. Press and hold the RESET button on the indoor unit for 3 seconds to set the operation.(3 beep sound and OPERATION lamp blink 5 time/sec. for 5 seconds) Do not operate ON timer and OFF timer. 2. Press and hold the RESET button on the indoor unit for 3 seconds to cancel the operation. (3 beep sound but OPERATION lamp does not blink) · In case of timer are set, AUTO RESTART OPERATION does not activate.
- 47 -
FILE NO. SVM-19002
9. MANUAL DEFORST OPERATION
To defrosting the heat exchanger of the outdoor unit during Heating operation.
Press and hold
: for 5 sec. then remote control display will show
[ ] as picture 1 for 2 sec.
MODE
Hi POWER ECO
SILENT OFF
9-4-3. Name and Functions of Indications on Remote Controller [Display]
All indications, except for the clock time indicator, are displayed by pressing the button.
1. Transmission mark
This transmission mark indicates when the
remote controller transmits signals to the indoor unit.
2. Mode indicator
Indicates the current operation mode.
(A : Auto, : Cool, : Dry, : Heat,
: Fan only)
3. Temperature indicator
Indicates the temperature setting.
(17°C to 30°C)
4. FAN speed indicator
Indicates the selected fan speed.
AUTO or five fan speed levels
(LOW , LOW+ , MED
, MED+
,
HIGH
, and QUIET ) can be shown.
Indicates AUTO when the operating mode is either
AUTO or : Dry.
5. OFF TIMER indicator
Indicates when the OFF timer is setting press the OFF timer button and select off time by TEMP botton after that back to press OFF timer again to timer setting and push CLEAR button to stop the operation.
1
2
3
6. Hi-POWER indicator
6
Indicates when the Hi-POWER operation starts.
Press the Hi-POWER button to start and press it
again to stop the operation.
MODE
Hi POWER ECO
SILENT OFF
7. ECO indicator
Indicates when the ECO is in activated. Press the ECO/ button to start and stop operation.
8. A, B change indicator remote controller
When the remote controller switching function is set, "B" appears in the remote controller display. (When the remote controller setting is "A", there is no indication at this position.)
8
4
9. SILENT indicator
7
Indicates when the SILENT operation start.
95
Press the ECO/ button to start and stop operation.
NORMAL
ECO
SILENT
- 48 -
FILE NO. SVM-19002
10. INSTALLATION PROCEDURE
10-1. Installation Diagram of Indoor and Outdoor Units
300 mm or more
Hook
Hook
1 Installation
plate
170 mm or more
Air filter
Batteries
3
(Attach to the front panel.)
Refrigerant piping must be protected from physical damage. Install a plastic cover or equivalent.
6
Flat head wood screw
4
Remote control holder
Vinyl tape Apply after carrying out a drainage test.
Shield pipe
50 mm or more
For the rear left, bottom left and left piping Wall
Cut out a piece of SPACER from indoor unit packaging box, roll it and insert between the indoor unit and wall to tilt the indoor unit for better operation.
The auxiliary piping can be connected to the left, rear left, rear right, right, bottom right or bottom left.
Right Rear right
Bottom right
Rear left
Left Bottom left
Do not allow the drain hose to get slack.
Cut the piping hole sloped slightly.
Make sure to run the drain hose sloped downward.
600 mm or more
2 Wireless remote control
100 mm or more
600 mm or more
100 mm or more
Saddle
Insulate the refrigerant pipes separately with insulation, not together.
Extension drain hose (Not available, provided by installer)
600 mm or more
8 mm thick heat resisting polyethylene foam
Before installing the wireless remote controller
· Loading Batteries
ACL
1. Remove the battery cover.
2. Insert 2 new batteries (AAA type)
following the (+) and (-) positions.
2 Wireless remote controller
3 Batteries
- 49 -
10-2. Installation
10-2-1. Optional installation parts
Part code
A
Parts name
Refrigerant piping Liquid side : Ø6.35 mm Gas side : Ø12.70 mm
B
Pipe insulating material (polyethylene foam, 8 mm thick)
C Putty, PVC tapes
<Fixing bolt arrangement of outdoor unit>
108 mm 28 mm
125 mm
Air inlet
Q'ty
One each
1
One each
FILE NO. SVM-19002
340 mm 320 mm
86 mm Ø25 mm
102 mm
Air outlet
600 mm
90 mm
Drain outlet
Fig. 10-2-1
· Secure the outdoor unit with fixing bolts and nuts if the unit is likely to be exposed to a strong wind. · Use 8 mm or 10 mm anchor bolts and nuts.
· If it is necessary to drain the defrost water, attach drain nipple 8 and cap waterproof 9 to the bottom plate of the outdoor unit before installing it.
- 50 -
10-2-2. Accessory and installation parts
No.
Part name
1 Installation plate × 1
Indoor Unit
No.
2
3
4
Battery × 2
5
6
Mounting screw × 6
7
8
Owner's Manual × 1
9 Screw × 2
Outdoor Unit
No.
Part name
No.
!
"
Drain nipple × 1
Air filters Clean every 2 weeks.
1. Open the air inlet grille. 2. Remove the air filters. 3. Vacuum or wash and then dry them. 4. Reinstall the air filters and close the air inlet grille.
FILE NO. SVM-19002
Part name Wireless remote control × 1 Remote control holder × 1 Flat head wood screw × 2
Installation Manual × 1
Part name Cap water proof × 2
- 51 -
FILE NO. SVM-19002
10-2-3. Installation/Servicing Tools
Changes in the product and components
In the case of an air conditioner using R32, in order to prevent any other refrigerant from being charged accidentally, the service port diameter of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch)
· In order to increase the pressure resisting strength of the refrigerant piping flare processing diameter and size of opposite side of flare nuts has been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)
New tools for R32(R410A)
New tools for R32(R410A)
Gauge manifold
Applicable to R22 model
×
Changes
As pressure is high, it is impossible to measure by means of conventional gauge. In order to prevent any other refrigerant from being charged, each port diameter has been changed.
Charge hose
×
In order to increase pressure resisting strength, hose materials and port size have been changed (to 1/2 UNF 20 threads per inch). When purchasing a charge hose, be sure to confirm the port size.
Electronic balance for refrigerant charging
¡
As pressure is high and gasification speed is fast, it is difficult to read the indicated value by means of charging cylinder, as air bubbles occur.
Torque wrench (nominal diam. 1/2, 5/8)
×
The size of opposite sides of flare nuts have been increased. Incidentally, a common wrench is used for nominal diameters 1/4 and 3/8.
Flare tool (clutch type)
¡
By increasing the clamp bar's receiving hole, strength of spring in the tool has been improved.
Gauge for projection adjustment
--
Vacuum pump adapter
¡
--
Used when flare is made by using conventional flare tool.
Connected to conventional vacuum pump. It is necessary to use an adapter to prevent vacuum pump oil from flowing back to the charge hose. The charge hose connecting part has two ports-one for conventional refrigerant (7/16 UNF 20 threads per inch) and one for R32(R410A). If the vacuum pump oil (mineral) mixes with R32(R410A) a sludge may occur and damage the equipment.
Gas leakage detector
×
Exclusive for HFC refrigerant.
· Incidentally, the "refrigerant cylinder" comes with the refrigerant designation R32(R410A) and protector coating in the U.S's ARI specified rose color (ARI color code: PMS 507).
· Also, the "charge port and packing for refrigerant cylinder" require 1/2 UNF 20 threads per inch corresponding to
the charge hose's port size.
- 52 -
FILE NO. SVM-19002
10-3. Indoor Unit
10-3-1. Installation place
· A place which provides the spaces around the indoor unit as shown in the diagram
· A place where there are no obstacles near the air inlet and outlet
· A place which allows easy installation of the piping to the outdoor unit
· A place which allows the front panel to be opened · The indoor unit shall be installed at least 2.5 m height.
Also, it must avoided to put anything on the top of the indoor unit.
CAUTION
· Direct sunlight to the indoor unit's wireless receiver should be avoided.
· The microprocessor in the indoor unit should not be too close to RF noise sources. (For details, see the owner's manual.)
<Remote control>
· A place where there are no obstacles such as a curtain that may block the signal from the indoor unit.
· Do not install the remote control in a place exposed to direct sunlight or close to a heating source, such as a stove.
· Keep the remote control at least 1 m apart from the nearest TV set or stereo equipment. (This is necessary to prevent image disturbances or noise interference.)
· The location of the remote control should be determined as shown below.
Indoor unit
(Side view)
(Top view)
Indoor unit
45° 75°
Reception range
Remote control
Reception range
45°
Remote control
10-3-2. Cutting a hole and mounting installation
<Cutting a hole> When installing the refrigerant pipes from the rear.
m from the right side edge is e center of pipe hole
35
120
180
240
23 mm
Pipe hole Ø65 mm
The center of the pipe hole is above the arrow.
Fig. 10-3-2
1. After determining the pipe hole position on the mounting plate (A), drill the pipe hole ( 65 mm) at a slight downward slant to the outdoor side.
NOTE
· When drilling a wall that contains a metal lath, wire lath or metal plate, be sure to use a pipe hole brim ring sold separately.
<Mounting the installation plate>
50 40
Anchor bolt holes
300 85
Hook
170 132 23
Ø65 mm
Pipe hole
Hook Indoor unit
Thread Weight
Hook
6 Mounting
screw
Pipe hole
1 Installation plate
Fig. 10-3-3
Fig. 10-3-1
- 53 -
FILE NO. SVM-19002
<When the installation plate is directly mounted on the wall>
1. Securely fit the installation plate onto the wall by screwing it in the upper and lower parts to hook up the indoor unit.
2. To mount the installation plate on a concrete wall with anchor bolts, utilize the anchor bolt holes as illustrated in the above figure.
3. Install the installation plate horizontally in the wall.
CAUTION
When installing the installation plate with a mounting screw, do not use the anchor bolt hole. Otherwise the unit may fall down and result in personal injury and property damage.
Installation plate <Keep horizontal direction>
Anchor bolt
Projection 15 mm or less
5 mm dia. hole
Fig. 10-3-4
6 Mounting screw 4 mm x 25 s
Clip anchor (local parts)
Fig. 10-3-5
CAUTION
Failure to firmly install the unit may result in personal injury and property damage if the unit falls.
· In case of block, brick, concrete or similar type walls, make 5 mm dia. holes in the wall.
· Insert clip anchors for appropriate mounting screws 6 .
NOTE: · Secure four corners and lower parts of the
installation plate with 4 to 6 mounting screws to install it.
Die-cutting back body slit
Changing drain hose Piping preparation
10-3-3. Piping and drain hose installation <Piping and Drain Hose Forming> * Since dewing results in a machine trouble, make
sure to insulate both the connecting pipes. (Use polyethylene foam as insulating material.)
Rear right
Rear left
Bottom left
Left
Bottom right
Right
Fig. 10-3-6
1. Die-cutting back body slit Cut out the slit on the leftward or right side of the back body for the left or right connection and the slit on the bottom left or right side of the back body for the bottom left or right connection with a pair of nippers.
2. Changing drain hose For leftward connection, bottom-leftward connection and rearleftward connection's piping, it is necessary to change the drain hose and drain cap.
<How to remove the Drain hose>
· The drain hose can be removed by removing the
screw securing the drain hose and then pulling out the drain hose.
· When removing the drain hose, be careful of any
sharp edges of steel plate. The edges can injuries. · To install the drain hose, insert the drain hose firmly
until the connection part contacts with heat insulator, and the secure it with original screw.
Drain hose
Fig.-3-7
<How to remove the Drain Cap> Clip the drain cap by needle-nose pliers and pull out.
- 54 -
Fig. 10-3-8
<How to fix the Drain Cap> 1) Insert hexagon wrench (4 mm) in a center head.
Fig. 10-3-9 2) Firmly insert drain cap.
Do not apply lubricating oil (refrigerant machine oil) when inserting the drain cap. Application causes
deterioration and drain leakage of the plug.
No gap
Fig. 10-3-10
Insert a hexagon wrench (4 mm).
CAUTION
Firmly insert the drain hose and drain cap; otherwise, water may leak.
<In case of right or left piping> · After scribing slits of the back body with a knife or a
making-off pin, cut them with a pair of nippers or an equivalent tool.
Slit
Fig. 10-3-11
<In case of bottom right or bottom left piping> · After scribing slits of the back body with a knife or
a making-off pin, cut them with a pair of nippers or an equivalent tool.
Slit
Fig. 10-3-12
FILE NO. SVM-19002
<Left-hand connection with piping>
Bend the connecting pipe so that it is laid within 43 mm above the wall surface. If the connecting pipe is laid exceeding 43 mm above the wall surface, the indoor unit may unstably be set on the wall. When bending the connecting pipe, make sure to use a spring bender so as not to crush the pipe.
Bend the connection pipe within a radius of 30 mm.
To connect the pipe after installation of the unit (figure)
(To the forefront of flare)
520 mm
Gas side
420 mm Liquid side
43 mm
Outward form of indoor unit
R 30 mm (Use polisin (polyethylene) core or the like for bending pipe.)
80
Use the handle of screwdriver, etc.
Fig. 10-3-13
NOTE If the pipe is bent incorrectly, the indoor unit may unstably be set on the wall. After passing the connecting pipe through the pipe hole, connect the connecting pipe to the auxiliary pipes and wrap the facing tape around them.
CAUTION
· Bind the auxiliary pipes (two) and connecting cable with facing tape tightly. In case of leftward piping and rear-leftward piping, bind the auxiliary pipes (two) only with facing tape.
Auxiliary pipes Installation plate
Indoor unit Connecting cable
· Carefully arrange pipes so that any pipe does not stick out of the rear plate of the indoor unit.
· Carefully connect the auxiliary pipes and connecting pipes to each other and cut off the insulating tape wound on the connecting pipe to avoid double-taping at the joint, moreover, seal the joint with the vinyl tape, etc.
· Since dewing results in a machine trouble, make sure to insulate both the connecting pipes. (Use polyethylene foam as insulating material.)
· When bending a pipe, carefully do it, not to crush it.
- 55 -
10-3-5. Indoor unit fixing 1. Pass the pipe through the hole in the wall, and hook
the indoor unit on the installation plate at the upper hooks. 2. Swing the indoor unit to right and left to confirm that it is firmly hooked up on the installation plate. 3. While pressing the indoor unit onto the wall, hook it at the lower part on the installation plate. Pull the indoor unit toward you to confirm that it is firmly hooked up on the installation plate.
Hook here.
1 Installation plate
Hook
Press (unhook)
Fig. 10-3-17
· For detaching the indoor unit from the installation plate, pull the indoor unit toward you while pushing its bottom up at the specified parts.
Push
Push
Fig. 10-3-18
Information
The lower part of indoor unit may float, due to the condition of piping and you cannot fix it to the installation plate. In that case, use the ! screws provided to fix the unit and the installation plate.
10 Screw
10 Screw
Fig. 10-3-19
FILE NO. SVM-19002
10-3-6. Drainage 1. Run the drain hose sloped downwards.
NOTE
· Hole should be made at a slight downward slant on the outdoor side.
Do not rise the drain hose.
Do not form the drain hose into a wavy shape.
50 mm or more
Do not put the drain hose end into water.
Do not put the drain hose end in the drainage ditch.
Fig. 10-3-20
2. Put water in the drain pan and make sure that the water is drained out of doors.
3. When connecting extension drain hose, insulate the connecting part of extension drain hose with shield pipe.
Shield pipe
Drain hose Inside the room Extension drain hose
Fig. 10-3-21
CAUTION
Arrange the drain pipe for proper drainage from the unit. Improper drainage can result in dew-dropping.
This air conditioner has the structure designed to drain water collected from dew, which forms on the back of the indoor unit, to the drain pan. Therefore, do not store the power cord and other parts at a height above the drain guide.
Wall Drain guide
Space for pipes
Fig. 10-3-22
- 56 -
FILE NO. SVM-19002
10-4. Outdoor Unit
10-4-1. Installation place
· A place which provides the spaces around the outdoor unit as shown in the diagram
· A place which can bear the weight of the outdoor unit and does not allow an increase in noise level and vibration
· A place where the operation noise and discharged air do not disturb your neighbors
· A place which is not exposed to a strong wind · A place free of a leakage of combustible gases · A place which does not block a passage · When the outdoor unit is to be installed in an elevated · position, be sure to secure its feet. · The allowable length of the connecting pipe.
Model
Chargeless Maximum length Additional refrigerent charging
RAS-24J2AVG-E RAS-24J2AVG-TR RAS-24J2AVG-UA RAS-24J2AVG-EE
Up to 15 m
20 m
16 20 m (20 g / 1 m)
· The allowable height of outdoor unit installation site.
Model
RAS-24J2AVG-E RAS-24J2AVG-TR RAS-24J2AVG-UA
RAS-24J2AVG-EE
Maximum height
12 m
· A place where the drain water does not raise any problems
Precautions for adding refrigerant
· Use a scale having a precision with at least 10 g per index line when adding the refrigerant. Do not use a bathroom scale or similar instrument.
· Use liquid refrigerant when refilling the refrigerant. Since the refrigerant is in liquid form, it can fill quickly. Therefore, perform the filling operation carefully and insert the refrigerant gradually.
CAUTION
When the outdoor unit is installed in a place where the drain water might cause any problems, Seal the water leakage point tightly using a silicone adhesive or caulking compound.
10-4-2. Precautions about Installation in Regions
with Snowfall and Cold Temperatures
· Do not use the supplied drain nipple for draining water. Drain the water from all the drain holes directly.
· To protect the outdoor unit from snow accumulation, install a holding frame, and attach a snow protection hood and plate.
· Do not use a double-stacked design.
Front
Anchor bolts
Snow protection plate
Install at least 50 cm Snow protection hood above the snow
accumulation line.
At least 50 cm Snow accumulation line
Holding frame
Fig. 10-4-1
CAUTION
1. Install the outdoor unit without anything blocking the air discharging.
2. When the outdoor unit is installed in a place exposed always exposed to strong wind like a coast or on a high storey of a building, secure the normal fan operation using a duct or a wind shield.
3. In particularly windy areas, install the unit such as to avoid admission of wind.
4. Installation in the following places may result in trouble. Do not install the unit in such places. · A place full of machine oil. · A saline-place such as the coast. · A place full of sulfide gas. · A place where high-frequency waves are likely to be generated as from audio equipment, welders, and medical equipment.
Strong wind
Fig. 10-4-2
- 57 -
FILE NO. SVM-19002
10-4-3. Draining the Water
· Holes are provided on the base plate of the outdoor unit to ensure that the defrost water produced during heating operations is drained off efficiently. If a centralized drain is required when installing the unit on a balcony or wall, follow the steps below to drain off the water.
1. Proceed with water-proofing by installing the water-proof rubber caps in the 2 elongated holes on the base plate of the outdoor unit. [How to install the water-proof rubber caps]
2. Install the drain nipple and a commercially available drain hose (with16 mm inside diameter), and drain off the water. (For the position where the drain nipple is installed, refer to the installation diagram of the indoor and outdoor units.)
· Check that the outdoor unit is horizontal, and route the
drain hose at a downward sloped angle while ensuring
that it is connected tautly.
Base plate
Drain nipple
1) Place four fingers into each cap, and insert the caps into the water drain holes by pushing them into place from the underside of the base plate.
2) Press down on the outer circumferences of the caps to ensure that they have been inserted tightly. (Water leaks may result if the caps have not been inserted properly, if their outer circumferences lift up or the caps catch on or wedge against something.)
Commercially available drain hose
Do not use ordinary garden hose, but one can flatten and preven water from draining.
Water-proof rubber caps (supplied with the outdoor unit)
Base plate Drain nipple
- 58 -
10-4-4. Refrigerant piping connection <Flaring> 1. Cut the pipe with a pipe cutter.
90°
Obliquity
Roughness Warp
Fig. 10-4-3 2. Insert a flare nut into the pipe, and flare the pipe.
· Projection margin in flaring : A (Unit : mm)
A
Die
Pipe
Fig. 10-4-4
RIDGID (clutch type)
Outer dia. of copper pipe
R32 tool used
Conventional tool used
Ø6.35
0 to 0.5
1.0 to 1.5
Ø9.52
0 to 0.5
1.0 to 1.5
Ø12.70
0 to 0.5
1.0 to 1.5
Pipes thickness
0.8 mm or more
IMPERIAL (wing nut type) Outer dia. of copper pipe Ø6.35 Ø9.52 Ø12.70 Pipes thickness
R32 1.5 to 2.0 1.5 to 2.0 2.0 to 2.5 0.8 mm or more
CAUTION
· Do not scratch the inner surface of the flared part when removing burrs.
· Flare processing under the condition of scratches on the inner surface of fl are processing part will cause refrigerant gas leak.
FILE NO. SVM-19002
<Tightening connection>
Align the centers of the connecting pipes and tighten the flare nut as far as possible with your fingers. Then tighten the nut with a spanner and torque wrench as shown in the figure.
Half union
Externally threaded side
Use a wrench to secure.
Flare nut
Internally threaded side
Use a torque wrench to tighten.
Fig. 10-4-5
CAUTION
· Do not apply excess torque. Otherwise, the nut may crack depending on the conditions.
Outer dia. of copper pipe Ø6.35 mm Ø9.52 mm Ø12.70 mm
(Unit : N·m)
Tightening torque 16 to 18 (1.6 to 1.8 kgf·m) 30 to 42 (3.0 to 4.2 kgf·m) 50 to 62 (5.0 to 6.2 kgf·m)
Tightening torque of flare pipe connections The operating pressure of R32 is higher than that of R22 (Approx. 1.6 times). It is therefore necessary to firmly tighten the flare pipe connecting sections (which connect the indoor and outdoor units) up to the specified tightening torque. Incorrect connections may cause not only a gas leakage, but also damage to the refrigerant cycle.
Flare at indoor unit side
Flare at outdoor unit side
Fig. 10-4-6
- 59 -
FILE NO. SVM-19002
10-4-4. Evacuating
After the piping has been connected to the indoor unit, you can perform the air purge together at once.
AIR PURGE Evacuate the air in the connecting pipes and in the indoor unit using a vacuum pump. Do not use the refrigerant in the outdoor unit. For details, see the manual of the vacuum pump.
<Using a vacuum pump>
Be sure to use a vacuum pump with counter-flow prevention function so that inside oil of the pump does not flow backward into pipes of the air conditioner when the pump stops. (If oil inside of the vacuum pump enters into the air conditioner, which use R32, refrigeration cycle trouble may result.) 1. Connect the charge hose from the manifold valve to
the service port of the gas side packed valve. 2. Connect the charge hose to the port of the vacuum
pump. 3. Open fully the low pressure side handle of the
gauge manifold valve. 4. Operate the vacuum pump to start evacuating.
Perform evacuating for about 15 minutes if the piping length is 20 meters. (15 minutes for 20 meters) (assuming a pump capacity of 27 liters per minute. Then confirm that the compound pressure gauge reading is -101 kPa (76 cmHg). 5. Close the low pressure side valve handle of gauge manifold. 6. Open fully the valve stem of the packed valves (both side of Gas and Liquid). 7. Remove the charging hose from the service port. 8. Securely tighten the caps on the packed valves.
Compound pressure gauge
101 kPa (76 cmHg)
Pressure gauge Manifold valve
Handle Lo Charge hose Connecting pipe
Handle Hi (Keep full closed) Charge hose
Vacuum pump adapter for counter-flow prevention
Vacuum pump
Packed valve at gas side Service port (Valve core (Setting pin)) Packed valve at liquid side
Fig. 10-4-7
CAUTION
· KEEP IMPORTANT 6 POINTS FOR PIPING WORK
1) Take away dust and moisture (inside of the connecting pipes).
2) Tighten the connections (between pipes and unit).
3) Evacuate the air in the connecting pipes using a VACUUM PUMP.
4) Check gas leak (connected points). 5) Be sure to fully open the packed valves before
operation. 6) Reusable mechanical connectors and flared
joints are not allowed indoors. When mechanical connectors are reused indoors, sealing parts shall be renewed. When flared joints are reused indoors, the fl are part shall be refabricated.
<Packed valve handling precautions>
· Open the valve stem all the way out, but do not try to open it beyond the stopper.
Pipe size of Packed Valve 12.70 mm and smallers 15.88 mm
Size of Hexagon wrench A = 4 mm A = 5 mm
· Securely tighten the valve cap with torque in the following table
Cap
Valve Rod Cap
Cap Size (H) H17 - H19 H22 - H30
Service
H14
Port Cap
H17
Torque
14~18 N.m (1.4 to 1.8 kgf·m)
33~42 N.m (3.3 to 4.2 kgf·m)
8~12 N.m (0.8 to 1.2 kgf·m)
14~18 N.m (1.4 to 1.8 kgf·m)
Hexagon wrench is required.
A
H Service Port Cap
Valve Rod Cap
Fig. 10-4-8
- 60 -
FILE NO. SVM-19002
10-5. Electrical works
Model Power source Maximum running current Circuit breaker rating Power supply cable Connecting cable
RAS-24J2KVG-E, TR, UA, EE 50Hz, 220 240 V Single phase
12.0A 15.0A H07RN-F or 60245 IEC66 (2.5 mm2 or more) H07RN-F or 60245 IEC66 (1.5 mm2 or more)
10-5-1. Wiring Connection
<Indoor unit>
Wiring of the connecting cable can be carried out without removing the front panel.
1. Remove the air inlet grille. Open the air inlet grille upward and pull it toward you.
2. Remove the terminal cover and cord clamp. 3. Insert the connecting cable (according to the local cords)
into the pipe hole on the wall. 4. Take out the connecting cable through the cable slot on
the rear panel so that it protrudes about 20 cm from the front. 5. Insert the connecting cable fully into the terminal block and secure it tightly with screws. 6. Tightening torque : 1.2 N·m (0.12 kgf·m) 7. Secure the connecting cable with the cord clamp. 8. Fix the terminal cover and air inlet grille on the indoor unit.
<Outdoor unit>
1. Remove the valve cover, the electric parts cover and the cord clamp from the outdoor unit.
2. Connect the connecting cable to the terminal as identif ed by the matching numbers on the terminal block of indoor and outdoor unit.
3. Insert the power cord and the connecting cable carefully into the terminal block and secure it tightly with screws.
4. Use vinyl tape, etc. to insulate the cords which are not going to be used. Locate them so that they do not touch any electrical or metal parts.
5. Secure the power cord and the connecting cable with the cord clamp.
6. Attach the electric parts cover and the valve cover on the outdoor unit.
Front panel
Terminals block
Air inlet grille
Screw
Cord clamp Screws Terminal cover
Fig. 10-5-1
<How to install the air inlet grille on the indoor unit>
· When attaching the air inlet grille, the contrary of the removed operation is performed.
Valve cover
Fig. 10-5-3
Fig. 10-5-2
- 61 -
FILE NO. SVM-19002
10-5-2. Power Supply and Connecting Cable Connection
Power Supply Input at Indoor Unit Terminal Block (Recommend)
Indoor Unit
Outdoor Unit
Power supply cable
Power supply cable connect to L N
Terminal block (L N 1 2 3)
Stripping length of the power supply cable
50 mm 10 mm
Earth line
Terminal block
Earth line
N
L 10 mm 70 mm
Connecting cable
Connecting cable
Power supply cable
Connecting cable connect to 1 2 3
Terminal block (L N 1 2 3)
Earth line
Earth line
Stripping length of the connecting cable
50 mm 10 mm
Earth line
3
10 mm 70 mm
Earth line Connecting cable
Power supply Connecting
cable
cable
Connecting cable
Power Supply Input at Outdoor Unit Terminal Block (Optional) Indoor Unit
Outdoor Unit
Connecting cable connect to L 2 3
Terminal block (L N 1 2 3)
Earth line
Stripping length of the connecting cable
50 mm 10 mm
Earth line
3 2 L
10 mm 70 mm
Terminal block Connecting cable
Power cord
Connecting cable
Earth line Connecting cable
Earth line Power cord
- 62 -
10-5-3.Power supply input wiring diagram
Power supply input at Indoor unit Terminal Block (Recommend)
Power supply input
Indoor Terminal Block
FILE NO. SVM-19002
CHASSIS
Outdoor Terminal Block
INDOOR UNIT OUTDOOR UNIT
CHASSIS
EARTH
Power supply input at Outdoor unit Terminal Block (Optional)
Indoor Terminal Block
INDOOR UNIT OUTDOOR UNIT
CHASSIS
Outdoor Terminal Block
Power supply input
CHASSIS
EARTH
CAUTION
1. The power supply must be same as the rated of air conditioner. 2. Prepare the power source for exclusive use with air conditioner. 3. Circuit breaker must be used for the power supply line of this air conditioner. 4. Be sure to comply power supply and connecting cable for size and wiring method. 5. Every wire must be connected firmly. 6. Perform wiring works so as to allow a general wiring capacity. 7. Wrong wiring connection may cause some electrical part burn out. 8. Incorrect or incomplete wiring is carried out, it will cause an ignition or smoke. 9. This product can be connected to main power supply.
Connection to fixed wiring : A switch which disconnects all poles and has a contact separation at least 3mm must be incorporated in the fixed wiring.
- 63 -
10-6. Others
10-6-1. Gas leak test
Check places for indoor unit (Flarenut connection)
FILE NO. SVM-19002
NOTE : 1. Repeat previous step to reset Remote Control to be A.
2. Remote Control A has not "A" display. 3. Default setting of Remote Control from
factory is A.
Check places for outdoor unit
Fig. 10-6-1
· Check the flare nut connections for the gas leak with a gas leak detector or soap water.
Fig. 10-6-2
10-6-3. Test operation
To switch the TEST RUN (COOL) mode, press [RESET] button for 10 sec. (The beeper will make a short beep.)
10-6-2. Remote Control A-B Selection
· When two indoor units are installed in the same room or adjacent two rooms, if operating a unit, two units may receive the remote control signal simultaneously and operate. In this case, the operation can be preserved by setting either one remote control to B setting. (Both are set to A setting in factory shipment.)
· The remote control signal is not received when the settings of indoor unit and remote control are different.
· There is no relation between A setting/B setting and A room/B room when connecting the piping and cables.
<Remote control A-B selection> To separate using of remote control for each indoor unit
in case of 2 air conditioners are installed nearly.
<Remote Control B Setup>
1. Press [RESET] button on the indoor unit to turn the air conditioner ON.
2. Point the remote control at the indoor unit. 3. Push and hold [CHECK] button on the Remote Control
by the tip of the pencil. "00" will be shown on the display (Picture 1).
4. Press [MODE] during pushing [CHECK]. "B" will show on the display and "00" will disappear and the air conditioner will turn OFF. The Remote Control B is memorized (Picture 2).
OPERATION / RESET Button
Fig. 10-6-3
10-6-4. Auto restart setting
This product is designed so that, after a power failure, it can restart automatically in the same operating mode as before the power failure.
Information
The product was shipped with Auto Restart function in the off position. Turn it on as required.
<How to set the auto restart>
1. Press and hold the [RESET] button on the indoor unit 3 seconds to set the operation. (3 beep sound and OPERATION lamp blink 5 time/sec for 5 seconds)
2. Press and hold the [RESET] button on the indoor unit for 3 seconds to cancel the operation. (3 beep sound but OPERATION lamp does not blink) · In case of ON timer or OFF timer are set, AUTO RESTART OPERATION dose not activate.
- 64 -
FILE NO. SVM-19002
11. HOW TO DIAGNOSE THE TROUBLE
The pulse motor circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles according to the trouble diagnosis procedure as described below. (Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.)
Table 11-1
No.
Troubleshooting Procedure
1 First Confirmation
2 Primary Judgment
3 Judgment by Flashing LED of Indoor Unit
4 Self-Diagnosis by Remote Controller
5 Judgment of Trouble by Every Symptom
No.
Troubleshooting Procedure
6 How to Check Simply the Main Parts
7 Troubleshooting
8 How to Diagnose Trouble in Outdoor Unit
9 How to Check Simply the Main Parts
10
How to Simply Judge Whether Outdoor Fan Motor is Good or Bad
K Precautions when handling the new inverter
CAUTION: HIGH VOLTAGEN
The high voltage circuit is incorporated. Be careful to do the check service, as the electric shock may be caused in case of touching parts on the P.C. board by hand.
The new inverter will be incorporated starting with this unit.
K The control circuitry has an uninsulated construction.
Fig. 11-1
- 65 -
FILE NO. SVM-19002
CAUTION
A high voltage (equivalent to the supply voltage) is also energized to ground through the sensors, PMV and other low-voltage circuits. The sensor leads and other wires are covered with insulated tubes for protection. Nevertheless, care must be taken to ensure that these wires are not pinched. Take sufficient care to avoid directly touching any of the circuit parts without first turning off the power. At times such as when the circuit board is to be replaced, place the circuit board assembly in a vertical position. Laying the board flat on an electrically conductive object (such as the top panel of the air conditioner's outdoor unit) while a charge is still retained by the electrolytic capacitors of the inverter's main circuit may cause short-circuiting between the electrolytic capacitors and secondary circuit components and result in damage to the components.
Fig. 11-2 Do NOT lay the circuit board assembly flat.
- 66 -
FILE NO. SVM-19002
K Precautions when inspecting the control section of the outdoor unit
NOTE : A large-capacity electrolytic capacitor is used in the outdoor unit controller (inverter). Therefore, if the power supply is turned off, charge (charging voltage DC280 to 380V) remains and discharging takes a lot of time. After turning off the power source, if touching the charging section before discharging, an electrical shock may be caused. Discharge the electrolytic capacitor completely by using soldering iron, etc. < Discharging method > 1. Remove the inverter cover (plating) by opening four mounting claws. 2. As shown below, connect the discharge resistance (approx. 10040W) or plug of the soldering iron to
voltage between + terminals of the C07 ("WARNING ELECTRIC SHOCK" is indicated.) electrolytic capacitor (760µF/400V) on P.C. board, and then perform discharging.
Inverter cover P. C. board (Soldered surface)
Fig. 11-3
CAUTION
A high voltage (equivalent to the supply voltage) is also energized to ground through the sensors, PMV and other low-voltage circuits. The sensor leads and other wires are covered with insulated tubes for protection. Nevertheless, care must be taken to ensure that these wires are not pinched. Take sufficient care to avoid directly touching any of the circuit parts without first turning off the power. At times such as when the circuit board is to be replaced, place the circuit board assembly in a vertical position. Laying the board flat on an electrically conductive object (such as the top panel of the air conditioner's outdoor unit) while a charge is still retained by the electrolytic capacitors of the inverter's main circuit may cause short-circuiting between the electrolytic capacitors and secondary circuit components and result in damage to the components.
- 67 -
FILE NO. SVM-19002
11-1. First Confirmation 11-1-1. Confirmation of Power Supply
Confirm that the power breaker operates (ON) normally.
11-1-2. Confirmation of Power Voltage Confirm that power voltage is AC 220230240 ± 10%. If power voltage is not in this range, the unit may not operate normally.
11-1-3. Operation Which is not a Trouble (Program Operation)
For controlling the air conditioner, the program operations are built in the microcomputer as described in the following table. If a claim is made for running operation, check whether or not it meets to the contents in the following table. When it does, we inform you that it is not trouble of equipment, but it is indispensable for controlling and maintaining of air conditioner.
Table 11-1-1
No.
Operation of air conditioner
Description
1 When power breaker is turned "ON", the
operation indicator (White) of the indoor unit flashes.
The OPERATION lamp of the indoor unit flashes when power source is turned on. If [ ] button is operated once, flashing stops. (Flashes also in power failure)
2 Compressor may not operate even if the room temperature is within range of compressor-ON.
The compressor does not operate while compressor restart delay timer (3-minutes timer) operates. The same phenomenon is found after power source has been turned on because 3-minutes timer operates.
3 In Dry and ECO mode, FAN (air flow)
The air flow indication is fixed to [AUTO].
display does not change even though FAN
(air flow select) button is operated.
4 Increasing of compressor motor speed
For smooth operation of the compressor, the compres-
stops approx. 30 seconds after operation sor motor speed is restricted to Max. 41 rps for 2 min-
started, and then compressor motor speed utes, and Max.91 rps for 2 minutes to 3 minutes, respec-
increases again approx. 30 seconds after. tively after the operation has started.
5 In AUTO mode, the operation mode is changed.
After selecting Cool or Heat mode, select an operation mode again if the compressor keeps stop status for 15 minutes.
6 In HEAT mode, the compressor motor
The compressor motor speed may decrease by high-
speed does not increase up to the maxi-
temp. release control (Release protective operation by
mum speed or decreases before the
temp.-up of the indoor heat exchanger) or current
temperature arrives at the set temperature. release control.
- 68 -
FILE NO. SVM-19002
11-2. Primary Judgment
To diagnose the troubles, use the following methods. 1) Judgment by flashing LED of indoor unit 2) Self-diagnosis by service check remote controller 3) Judgment of trouble by every symptom Firstly use the method 1) for diagnosis. Then, use the method 2) or 3) to diagnose the details of troubles.
11-3. Judgment by Flashing LED of Indoor Unit
While the indoor unit monitors the operation status of the air conditioner, if the protective circuit operates, the contents of self-diagnosis are displayed with block on the indoor unit indication section.
Table 11-3-1
Item
Check code
Block display
Description for self-diagnosis
A
Indoor indication
lamp flashes.
OPERATION Flashing display (1 Hz)
Power failure (when power is ON)
B
Which lamp does flash?
C
OPERATION Flashing display (5 Hz)
Protective circuit operation for indoor P.C. board
OPERATION TIMER (White) Flashing display (5 Hz)
Protective circuit operation for connecting cable and serial signal system
OPERATION
D
Flashing display (5 Hz) Protective circuit operation for outdoor P.C. board
OPERATION
E
TIMER Flashing display (5 Hz)
Protective circuit operation for others (including compressor)
OPERATION TIMER Release status display
Normal
Normal Nothing
F
Flash 1 H z
None Current release
Flash 2 H z 2 times every 1 sec.
None TD release
None
Flash 1 Hz TCrelease
NOTES : 1. The contents of items B and C and a part of item E are displayed when air conditioner operates. 2. When item B and C, and item B and a part of item E occur concurrently, priority is given to the block of item B. 3. The check codes can be confirmed on the remote controller for servicing.
- 69 -
FILE NO. SVM-19002
11-4. Self-Diagnosis by Remote Controller (Check Code)
1. If the lamps are indicated as shown B to E in Table 11-3-1, execute the self-diagnosis by the remote controller. 2. When the remote controller is set to the service mode, the indoor controller diagnoses the operation condi-
tion and indicates the information of the self-diagnosis on the display of the remote controller with the check codes. If a fault is detected, all lamps on the indoor unit will flash at 5Hz and it will beep for 10 seconds (Beep, Beep, Beep ... ). The timer lamp usually flashes (5Hz) during self-diagnosis.
11-4-1. How to Use Remote Controller in Service Mode
Alphanumeric characters are
used for the check codes.
is 5.
is 6.
is A.
is B.
is C.
is D.
1 Press [CHECK] button with a tip of pencil to set the
remote controller to the service mode. · " " is indicated on the display of the remote
controller.
2 Press [TEMP ] or [TEMP ] button If there is no fault with a code, the indoor unit will beep once (Beep) and the display of the remote controller will change as follows :
· · ·
· The TIMER indicator of the indoor unit flashes continuously. (5 times per 1 sec.)
· Check the unit with all 52 check codes ( to ) as shown in Table-11-4-1.
· Press [TEMP ] or [TEMP ] button to change the check code backward.
If there is a fault, the indoor unit will beep for 10 seconds (Beep, Beep, Beep...). Note the check code on the display of the remote controller. · 2-digits alphanumeric will be indicated on the display. · All indicators on the indoor unit will flash.
(5 times per 1 sec.)
3 Press [CLEAR] button. After service finish for clear service code in memory. · "7F" is indicated on the display of the remote control.
4 Press [ ] button to release the service mode.
· The display of the remote controller returns to as it was before service mode was engaged.
Fig. 11-4-1
- 70 -
FILE NO. SVM-19002
11-4-2 Caution at Servicing 1. After using the service mode of remote controller finished, press the [ ] button to reset the remote controller to
normal function. 2. After finished the diagnosis by the remote controller, turn OFF power supply and turn its ON again to reset the air
conditioner to normal operation. However, the check codes are not deleted from memory of the microcomputer. 3. After servicing finished, press [CLR] button of remote controller under service mode status to send code "7F" to the
indoor unit. The check code stored in memory is cleared.
Block distinction
Check code
Block
Indoor P.C. board.
Table 11-4-1
Check code
Operation of diagnosis function
Cause of operation
Air conditioner
status
Display flashing error
Action and Judgment
TA sensor ; The room
Operation Flashes when 1. Check the sensor TA and connection.
temperature sensor is
continues. error is detected. 2. In case of the sensor and its
short-Circuit or disconnection.
connection is normal, check the
P.C. board.
TC sensor ; The heat exchanger temperature sensor of the indoor unit is out of place, disconnection, short-circuit or migration.
Operation continues.
Flashes when 1. Check the sensor TC and connection. error is detected. 2. In case of the sensor and its
connection is normal, check the P.C. board.
Fan motor of the indoor unit is failure, lock-rotor, shortcircuit, disconnection, etc. Or its circuit on P.C. board has problem.
All OFF
Flashes when 1. Check the fan motor and connection. error is detected. 2. In case of the motor and its
connection is normal, check the P.C. board.
Other trouble on the indoor P.C. board.
Depend on cause of failure.
Depend on cause of failure.
1. Reset power supply. 2. Replace P.C. board.
- 71 -
FILE NO. SVM-19002
Block distinction
Operation of diagnosis function
Check code
Block
Check code
Cause of operation
Air conditioner
status
Display flashing error
Action and Judgment
Serial signal and connecting cable.
1) Defective wiring of the connecting cable or miss-wiring.
2) Operation signal has not send from the indoor unit when operation start.
3) Outdoor unit has not send return signal to the indoor unit when operation started.
4) Return signal from the outdoor unit is stop during operation. Some protector (hardware, if exist) of the outdoor unit open circuit of signal. Signal circuit of indoor P.C. board or outdoor P.C. board is failure in some period.
Indoor unit Flashes when
operates
error is detected.
continue.
Flashing stop
Outdoor unit and outdoor unit
stop.
start to operate
when the return
signal from the
outdoor unit is
normal.
Note : Operation signal of the indoor unit shall be measured in the sending period as picture below.
VDC 60
Sending signal of the indoor unit when have not return signal from the outdoor unit.
***
3 minutes Delay, start
*
counting from power
supply ON or remote
OFF.
15
3 minutes stop
**
Voltage variation stop or have not voltage output.
1) to 3) The outdoor unit never operate. Check connecting cable and correct if defective wiring. Check 25A fuse of inverter P.C. board. Check 3.15A fuse of inverter P.C. board. Check operation signal of the indoor unit by using diode. Measure voltage at terminal block of the indoor unit between No.2 and No.3 (or L2 and S) If signal is varied 15-60V continuously, replace inverter P.C. board. If signal is not varied, replace indoor P.C. board.
4) The outdoor unit abnormal stop at some time. If the other check codes are found concurrently, check them together. Check protector (hardware) such as Hi-Pressure switch, Thermal-Relay, etc. Check refrigerant amount or any possibility case which may caused high temperature or high pressure. Check operation signal of the indoor unit by using diode. Measure voltage at terminal block of the indoor unit between No.2 and No.3 (or L2 and S) If signal is varied 15-60V continuously, replace inverter P.C. board. If signal is not varied, replace indoor P.C. board.
Measured signal voltage by apply diode
0
3
4
7
8
Time (Min)
* Signal send only 1 minute and stop. Because of return signal from outdoor unit has not received.
** Signal resend again after 3 minutes stop. And the signal will send continuously.
** * 1 minute after resending, the indoor unit display flashes error.
- 72 -
FILE NO. SVM-19002
Block distinction
Check code
Block
Outdoor P.C. board
Check code
Operation of diagnosis function
Cause of operation
Air conditioner
status
Display flashing error
Current on inverter circuit
All OFF Flashes after
is over limit in short time.
error is detected
Inverter P.C. board is
8 times*.
failure, IGBT shortage, etc.
Compressor current is
higher than limitation,
lock rotor, etc.
Action and Judgment
1. Remove connecting lead wire of the compressor, and operate again.
2. If outdoor fan does not operate or operate but stop after some period, replace the inverter P.C. board.
3. If outdoor fan operates normally, measure 3-Phase output of inverter P.C. board (150-270VAC) at the connecting lead wire of compressor.
4. If 3-Phase output is abnormal, replace inverter P.C.Board.
5. If 3-Phase output is normal, replace compressor. (lock rotor, etc.)
Compressor position-detect circuit error or short-circuit between winding of compressor.
All OFF
Flashes after error is detected 8 times*.
1. Remove connecting lead wire of the compressor, and operate again.
2. If outdoor fan does not operate or operation but stop after some period, replace the inverter P.C. board.
3. If outdoor fan operates normally, measure resistance of compressor winding. If circuit is shortage, replace the compressor.
Current-detect circuit of inverter P.C. board error.
All OFF
Flashes after error is detected 4 times*.
Even if trying to operate again, all operations stop, replace inverter P.C. board.
TE or TS sensor; abnormal. Out of place, disconnection, shortage, or misconnection (TE sensor is connected to TS connector, TS sensor is connected to TE sensor connector)
TE sensor; Outdoor heat exchanger temperature sensor
TS sensor; Suction pipe temperature sensor TD sensor ; Discharge pipe temperature sensor is disconnection or shortage.
Outdoor fan failure or its drive-circuit on the inverter P.C. board failure.
TO sensor ; The outdoor temperature sensor is disconnection or shortage.
All OFF
Flashes after error is detected 4 times*.
All OFF
Flashes after error is detected 4 times*.
All OFF
Flashes after error is detected 8 times*.
Operation continues.
Record error after detected 4 times*. But does not flash display.
1. Check sensors, TE, TS connection. In case of sensors and it's connection is normal, check the inverter P.C. board
2. Check 4way valve operation/position. In case TE, TS detected temperature relationship are different from normal operation, "18" might be detected.
1. Check sensors TD and connection. 2. In case of the sensor and its
connection is normal, check the inverter P.C. board. 1. Check the motor, measure winding resistance, shortage or lock rotor. 2. Check the inverter P.C. board. 1. Check sensors TO and connection. 2. In case of the sensor and its connection is normal, check the inverter P.C. board.
- 73 -
FILE NO. SVM-19002
Block distinction
Check code
Block
Outdoor P.C. board
Check code
Operation of diagnosis function
Cause of operation
Air conditioner
status
Display flashing error
Action and Judgment
Compressor drive output error.
All OFF Flashes after
1. Check installation conditions such as
(Relation of voltage, current
error is detected packed valve opening, refrigerant
and frequency is abnormal)
8 times*.
amount and power supply (rate +10%,
Overloading operation of
both of operation and non operation
compressor caused by
condition).
over-charge refrigerant,
2. (In case of P.M.V. exists)
P.M.V. failure, etc.
Check P.M.V. by measure the
Compressor failure (High
resistance of the coil and confirm its
current).
operation (sound of initial
operation, etc.)
3. Observe any possibility cause which
may affect operation load of
compressor.
4. Operate again. If compressor operation
is failure when 20 seconds passed
(count time from operation starting of
compressor), replace compressor.
* 4 or 8 times ; When first error is detected, error is count as 1 time, then once operation is stop and re-started. After re-starting operation within 6 minutes, if same error is detected, error count is add (count become 2 times) When error count comes 4, 8, 11 or 18 times, record error to check code. But after re-starting operation, if no error is detected and air conditioner can operate more than 6 minutes, error count is cleared.
The others (including compressor)
Return signal of the outdoor unit has been sent when operation start. But after that, signal is stop some time.
Instantaneous power failure. Some protector (hardware) of the outdoor unit open circuit of signal. Signal circuit of indoor P.C. board or outdoor P.C. board is failure in some period.
Indoor unit Flashes when 1. Check power supply (Rate + 10%)
operates
error is detected. 2. If the air conditioner repeat operates and
continue.
Flashing stop
stop with interval of approx. 10 to 40
Outdoor unit and outdoor unit minutes.
stop.
start to operate
(In case of these exist)
when the return
Check protector (hardware) such as
signal from the
Hi-Pressure switch, Thermal-Relay, etc.
outdoor unit is
Check refrigerant amount, packed valve
normal.
opening and any possibility cause which
may affect high temperature or high
pressure.
3. Check operation signal of the indoor unit
by using diode. Measure voltage at
terminal block of the indoor unit
between No.2 and No.3 (or L2 and S) If
signal is varied 15-60V continuously,
replace inverter P.C. board.
If signal is not varied, replace indoor
P.C. board.
- 74 -
FILE NO. SVM-19002
Block distinction
Check code
Block
The others (including compressor)
Check code
Operation of diagnosis function
Cause of operation
Air conditioner
status
Display flashing error
Action and Judgment
Compressor does not rotate. All OFF
Flashes after
1. Remove connecting lead wire of the
Because of missed wiring,
error is detected compressor, and operate again.
missed phase or shortage.
8 times*.
2. If outdoor fan does not operate or
operation but stop after some period,
replace the inverter P.C. board.
3. If outdoor fan operates normally,
measure 3-Phase output of inverter
P.C. board (150-270VAC) at the
connecting lead wire of compressor.
4. If 3-Phase output is abnormal, replace
inverter P.C.Board.
5. If 3-Phase output is normal, measure
resistance of compressor winding.
6. If winding is shortage, replace the
compressor.
Discharge temperature exceeded 117oC.
All OFF
Flashes after
1. Check sensors TD.
error is detected 2. Check refrigerant amount.
4 times*.
3. (In case of P.M.V. exists)
Check P.M.V. by measure the
resistance of the coil and confirm its
operation (sound of initial operation, etc.)
4. Observe any possibility cause which
may affect high temperature of
compressor.
Compressor is high current though operation Hz is decreased to minimum limit.
Installation problem. Instantaneous power failure. Refrigeration cycle problem. Compressor break down. Compressor failure (High current).operation, etc.)
All OFF
Flashes after
1. Check installation conditions such as
error is detected packed valve opening, refrigerant
8 times*.
amount and power supply (rate +10%,
both of operation and non operation
condition).
2. (In case of P.M.V. exists)
Check P.M.V. by measure the
resistance of the coil and confirm its
operation (sound of initial operation, etc.)
3. Observe any possibility cause which
may affect high current of compressor.
4. If 1, 2 and 3 are normal, replace
compressor.
- 75 -
FILE NO. SVM-19002
Block distinction
Check code
Block
The others (including compressor)
Check code
Operation of diagnosis function
Cause of operation
Air conditioner
status
Display flashing error
Action and Judgment
Return signal of the outdoor unit has been sent when operation start. But after that, signal is stop some time.
Instantaneous power failure. Some protector (hardware) of the outdoor unit open circuit of signal. Signal circuit of indoor P.C. board or outdoor P.C. board is failure in some period.
TE, TC high tmperature TE for cooling operation TC for heating operation. (TE only exists in the Heat Pump system)
Indoor unit operates continue. Outdoor unit stop.
Flashes when error is detected
11 times*.
Flashing stop and outdoor unit start to operate when the return signal from the outdoor unit is normal.
1. Check power supply (Rate +10%)
2. If the air conditioner repeat operat and stop with interval of approx. 10 to 40 minutes. (In case of these exist) Check protector (hardware) such as Hi-Pressure switch, Thermal-Relay, etc. Check refrigerant amount, packed valve opening and any possibility cause which may affect high temperature or high pressure.
3. Check operation signal of the indoor unit by using diode. Measure voltage at terminal block of the indoor unit between No.2 and No.3 (or L2 and S) If signal is varied 15-60V continuously, replace inverter P.C. board. If signal is not varied, replace indoor P.C. board.
4. Check and clean heat exchanger area Indoor and Outdoor unit.
* 4, 8 or 11 times ; When first error is detected, error is count as 1 time, then once operation is stop and re-started. After re-starting operation within 6 minutes, if same error is detected, error count is add (count become 2 times) When error count comes 4, 8, 11 or 18 times, record error to check code. But after re-starting operation, if no error is detected and air conditioner can operate more than 6 minutes, error count is cleared.
- 76 -
FILE NO. SVM-19002
11-5. Judgment of Trouble by Every Symptom 11-5-1. Indoor Unit (Including Remote Controller)
(1) Power is not turned on (Does not operate entirely) <Primary check> 1. Is the supply voltage normal? 2. Is the normal voltage provided to the outdoor unit? 3. Is the crossover cable connected properly? 4. Is the fuse (F01) blown?
Operation
Check Item
Considerable principle cause
Turn off power supply once, and 5 second later, turn it on again.
Measures
NO Is OPERATION indicator flashing? YES
Item by symptoms
Is it possible to turn on A/C by pushing [ ] button
on remote controller? YES
Unit operates normally.
NO
Does transmission mark on remote controller flash normally,and is its signal
NO
Remote controller is defective.
transmitted properly?
YES
Refer to (5) "Troubleshooting for remote controller".
Point remote to digital
camera. Can see infrared ray at sending LED
NO
on camera monitor
when push [ ] button?
YES
Replace remote control
Is fuse (F01) of indoor control
board blown? NO
YES
YES
Is fuse (F02) of indoor control
board blown? NO
Is voltage (DC5V, 12V and 15V) indicated on rear of
indoor control board nor mal?
YES
NO
Does connection between PC Board
and reciver PCB are connect properly?
NO
YES
Reconnect housing
Microcomputer is defective.
Replace main P.C. board
Replace fan motor.
· Be sure to disconnect the motor connector CN36 after shut off the power supply, or it will be a cause of damage of the motor.
- 77 -
FILE NO. SVM-19002
(2) Power is not turned on though Indoor P.C. board is replaced <Confirmation procedure>
Turn on power supply.
Does operation lamp flash? YES
NO Is it wired as shown in Figure below?
YES
NO
Return the wiring of the
power relay is returned to
the normal procedure.
To the paragraph of "No Power turns on".
CN28 WP-038
- 78 -
FILE NO. SVM-19002
(3) Only the indoor motor fan does not operate
<Primary check>
1. Is it possible to detect the power supply voltage (AC220240V) between Q and R on the terminal block?
2. Does the indoor fan motor operate in cooling operation? (In heating operation, the indoor fan motor does not operate for approximately 10 minutes after it is turned on, to prevent a cold air from blowing in.)
Turn off power supply once, and turn it on again.
Does fan motor
YES
Is it possible to detect DC 1V or more between
NO
continue to operate?
5 + and 3 of motor connector (CN36)?
NO
YES
Is fuse (F02) of indoor control
board blown? NO
YES
Does check
NO
operation LED flash?
Does check connecting cable or power supply
NO
cord complely?
YES
YES
Start to operate indoor unit in cooling operation at airflow level "LOW".
Does check
NO
5V at display unit?
YES
Reconnecting the in terconnection cable
and terminal block
Does check 5V
NO
at main P.C board?
YES
Replace display unit
Replace indoor fan motor.
Does indoor fan operate?
YES
NO
Is it possible to detect DC 311340V between
NO
1 + and 3 of motor
connector (CN36)?
YES
(Motor connection condition) Is it possible to detect DC 15V
NO
between 4 + and 3 of
motor connector (CN36)?
YES
Turn off indoor unit and remove connector from motor. Then push [ ] button
on remote controller to stop flashing lamp on indoor unit.
Change airflow level to "HIGH".
A
Start to operate the
indoor unit in except
heating operation.
NO
At this time, is it possible to
detect DC 1V or more between
5 + and 3 of motor
connector (CN36)?
YES
B
Is it possible to detect DC 15V between 4 +
NO
and 3 of motor
connector(CN36)?
YES
Turn off indoor unit and remove connector from motor. Then start to operate indoor unit with remote controller.
Start to operate the
indoor unit in except
heating operation.
At this time, is it possible to detect DC 1V or more
NO
between 5 + and 3
of motor connector(CN36)?
(Check this condition within
15 seconds after
starting unit.)
YES
Replace main P.C. board.
- 79 -
FILE NO. SVM-19002
A
Is it possible to NO change airflow level
to "HIGH"? YES
Does check display
NO
on remote show high?
YES
Change the new PC
NO
board. Does fan speed
change?
YES B
Replace remote Replace motor
Fan motor operates normally.
Is it possible to
NO
rotate cross-flow fan by
hand properly?
YES
Turn off indoor unit
and rotate cross-flow
fan by hand when the
unit is on standby.
NO
At this time, is it possible to
detect DC 1V or more
between 5 + and 3
of motor connector
(CN36)?
YES
Does check cross-flow
NO
fan bearing normal
condition?
YES
Replace bearing of cross-flow fan.
Replace indoor fan motor.
Replace main P.C. board.
- 80 -
FILE NO. SVM-19002
(4) Indoor fan motor automatically starts to rotate by turning on power supply [For DC fan motor]
<Cause> The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to inside of the motor. If the P.C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning on power supply.
<Inspection procedure> 1. Remove the front panel. (Remove 2 screws.) 2. Remove the cover of the fan motor lead wires. 3. Check DC voltage with CN36 connector while the fan motor is rotating.
NOTE : · Do not disconnect the connector while the fan motor is rotating. · Use a thin test rod.
Indoor fan starts rotating when power supply is turned on.
(Check output DC voltage of fan motor on P.C. board.)
Measure voltage between 3 (GND : BLACK) and 5 (V line : YELLOW) of motor connector (CN36)
while indoor fan motor is rotating.
DC 1.0V or more
Under DC 1.0V
P.C. board is defective.
Motor is defective.
Replace P.C. board.
Replace motor.
P.C. board CN36
Yellow Black
6 (Blue) 5 (Yellow) 4 (White) 3 (Black) 2 1 (Red)
DC
- 81 -
FILE NO. SVM-19002
(5) Troubleshooting for remote controller <Primary check> Check that A or B selected on the main unit is matched with A or B selected on the remote controller.
Push the [ ] button.
There is no beep from the indoor unit The OPERATION lamp of the air conditioner main unit does not light
Does the transmission NO indicator blink?
YES
Is there direct sunlight on the NO receptor of the air
conditioner?
YES
Is there any
thyristor
NO
fluorescent light
nearly?
YES
Is operation
possible when the
NO
transmitter is moved
nearer to the infrared
signal receiver of the
air conditioner?
YES
Battery life
Reset the remote control by take off
batteries
Push the [ ] button
Is operation possible
when setting the
NO
temporary switch of the
air conditioner main unit
to "TEST RUN" or
"TEMPORARY AUTO"?
YES
Can any signal tone
be heard in a transistor
NO
radio when transmitting
within 5 cm distance
from the radio?
YES
Dose the transmission
NO
indicator light?
YES
NO
Is there any beep and
operation?
YES
Avoid direct sunlight.
P.C. board is failure.
Keep the air conditioner away
from thyristor fluorescent light.
Replace P.C. board
Replace the batteries
Normal
Remote control is failure.
Replace remote control.
- 82 -
FILE NO. SVM-19002
11-5-2. Wiring Failure (Interconnecting and Serial Signal Wire)
(1) Outdoor unit does not operate
1) Is the voltage between R and S of the indoor terminal block varied?
Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the following diagram. NOTE: · Measurement should be performed 2 minutes and 30 seconds after starting of the operation. · Be sure to prepare a diode for judgment.
Terminal block at indoor side
Red 3 White 2
S5277G
1 Terminal block
Tester
S5277G or equivalent (G or J type) (Diode with rated voltage of 400V or more is acceptable.)
Normal time : Voltage swings between DC15 and 60V. ...................Inverter Assembly check (11-7-1.) Abnormal time : Voltage does not vary.
(2) Outdoor unit stops in a little while after operation started <Check procedure> Select phenomena described below.
1) The outdoor unit stops 10 to 20 minutes after operation started, and 10 minutes or more are required to restart the unit.
Gas circulation amount is down. Measure gas pressure.
Thermo. operation of compressor
Gas shortage Gas leak Pipe clogging
2) If the unit stops once, it does not operate until the power will be turned on again.
To item of Outdoor unit does not operate.
3) The outdoor unit stops 10 minutes to 1 hour after operation started, and an alarm is displayed. (Discharge temp. error check code 03, 1E Sensor temp. error check code 02, 1C)
Gas leak P.M.V. is defective. Miswiring of connecting wires of indoor/outdoor units Clogging of pipe and coming-off of TC sensor
Refer to the chart in 11-6.
- 83 -
11-6. How to Check Simple the Main Parts
<Check procedure>
1C
Gas leakage, disconnection of TS/TC sensors (Check code 02, 1C)
1E
Discharge temp. error, gas leakage (Check code 03, 1E)
FILE NO. SVM-19002
Valve drive check
Is coil of the pulse motor valve
NO
(P.M.V.) correctly set?
YES
NO Is connecter of coil connected to inverter?
YES
Is positioning sound of valve (sound hitting to stopper) heard from valve when the air conditioner starts the operation after turning off power NO
of the air conditioner once?
YES
Are temp. sensors of indoor/outdoor units correctly set to the holder?
NOTE :
NO
The temperature sensors which are used to control pulse motor valve
include indoor heat exchanger sensor (TC), outdoor heat exchanger temp.
sensor (TE), outdoor suction temp. sensor (TS) and outdoor sensor (TO).
YES
Gas amount check and valve clogging check
Remove TC sensor connector from the P.C. board in indoor unit. (Remove connector from the P.C. board.) Operate the air conditioner in COOL mode by TEMP button ("Beep" sound is heard if keeping pushed for 10 seconds.). The operation enters temporary operation mode which fixes opening degree of compressor speed. Check condensation at outlet of PMV, and then check operating pressure from the service port.
Existence of condensation at outlet of P.M.V. If there is condensation at outlet (1/4 inch=Ø6.35mm valve side),
the valve is clogged.
YES
Check the operating pressure from service port, and add gas if pressure is low.
Set it correctly. Set it correctly. Replace coil valve. Set it correctly.
Replace valve. Add gas.
- 84 -
11-7. How to Diagnose Trouble in Outdoor Unit 11-7-1. Summarized Inner Diagnosis of Inverter Assembly
FILE NO. SVM-19002
Diagnosis/Process flowchart
Remove connector of compressor.
Check 25A fuse (Part No.F01).
OK
NG Replace fuse.
Check electrolytic capacitor, diode block (DB01),
etc.
Table 11-7-1 Item
Contents
Summary
Preparation
Turn "OFF" the power supply breaker, and remove 3P connector which connects inverter and compressor.
Check Check
· Check whether 25A fuse on the control board assembly is blown or not. (F01)
If fuse was blown, be sure to check the electrolytic capacitor and diode block. (DB01)
· Connect discharge resistance (approx. 100, 40W) or soldering iron (plug) between +, terminals of the electrolytic capacitor (760µF) of C07 (with printed WARNING ELECTRIC SHOCK) on P.C. board.
Check terminal voltage of electrolytic
capacitor.
OK
NG
Check electrolytic capacitor, diode
(DB01), etc.
Does outdoor NO fan rotate?
YES
Remove connector CN31 of outdoor fan NG motor, and using a tester, check resistance value between every phases at motor side.
OK
Replace outdoor fan motor.
A
B
Operation
Measurement
Check Stop
Check Measure-
ment
Turn on the power breaker, and operate the air conditioner in COOL mode by time shortening.
OK if 760µF DC280 to 380V
Measure terminal voltage of the electrolytic capacity.
760µF:400V x 2
After operation, turn off the power breaker after 2 minutes 20 seconds passed, and discharge the electrolytic capacitor by soldering iron. Check voltage between motor phases.
Remove CN31 whilepushing the part indicated by an
by an arrow because CN31
is a connector with lock.
· Is not winding between QR, R-S, or Q-S opened
or short-circuited?
· Is not frame grounded with
Q, R, or S?
Resistance between phases should be approx. 16 to 51
Should be 100M or more.
- 85 -
FILE NO. SVM-19002
Diagnosis/Process flowchart
A
B
Replace control board assembly.
Check compressor NG
winding resistance.
OK
Replace control board.
Replace compressor.
Item Check
Contents
Summary
Check winding resistance between phases of compressor, and resistance between outdoor frames by using a tester.
· Is not grounded.
· Is not short-circuited between windings.
· Winding is not opened.
OK if 20M or more
OK if about 1.57
(Check by a digital tester.)
Operation
Remove connector CN31 of the outdoor fan motor, turn on the power supply breaker, and perform the operation. (Stops though activation is prompted.)
Check operation within 2 minutes 20 seconds after activation stopped.
11-8. How to Check Simply the Main Parts
11-8-1. How to Check the P.C. Board (Indoor Unit)
(1) Operating precautions 1) When removing the front panel or the P.C. board, be sure to shut off the power supply breaker. 2) When removing the P.C. board, hold the edge of the P.C. board and do not apply force to the parts. 3) When connecting or disconnecting the connectors on the P.C. board, hold the whole housing. Do not pull at the lead wire.
(2) Inspection procedures 1) When a P.C. board is judged to be defective, check for disconnection, burning, or discoloration of the copper foil pattern or this P.C. board. 2) The P.C. board consists of the following 2 parts
a. Main P.C. board part : DC power supply circuit, Indoor fan motor control circuit, CPU and peripheral circuits, buzzer, and Driving circuit of louver.
b. Indication unit of infrared ray receiving infrared ray receiving circuit, LED : To check defect of the P.C. board, follow the procedure described below.
- 86 -
FILE NO. SVM-19002
(3) Check procedures
Table 11-8-1
No.
Procedure
1 Turn off the power supply breaker and remove the P.C. board assembly from electronic parts base. Remove the connecting cables from the terminal block.
Check points
Causes
Check whether or not the fuse (F01) Impulse voltage was applied or the
or (F02) is blown.
indoor fan motor short-circuited.
2 Remove the connector of the motor and turn on the power supply breaker.
If OPERATION indicator flashes (once per second), it is not necessary to check steps (1 to 3) in the right next column.
Check power supply voltage :
1. The terminal block or the crossover
1. Between No. 4 of RY01 and CN31 cable is connected wrongly.
(AC 220240V)
2. The capacitor (C01), line filter (L01),
2. Between and of C03 (DC 310340V)
resistor (R03), or the diode (DB01) is defective.
3. Between of C117 and output 3. IC11, R105, R117 and T-01 are
side of IC15 (DC 15V)
defective.
4. Between 12V and GND 5. Between 5V and GND
4. IC11, IC14, C112 and T-01 are defective.
3 Push [ ] button once to start the unit. (Do not set the mode to Fan Only or On-Timer operation.)
Check power supply voltage :
1. Between CN28 and CN31 (DC 1560V)
IC51 and IC52 are defective.
4 Shorten the restart delay timer and Check whether or not all indicators The indicators are defective or the
start unit.
(OPERATION, TIMER, Hi-POWER, housing assembly (CN10) is defective.
ECO, WiFi) are indicated for 3
seconds and they return to normal 3
seconds later.
5 Push [ ] button once to start the 1. Check whether or not the
unit,
compressor operates.
· Shorten the restart delay timer. 2. Check whether or not the
· Set the operation mode to COOL.
OPERATION indicator flashes.
· Set the fan speed level to AUTO.
· Set the preset temperature much lower than the room temperature. (The unit (compressor) operates continuously in the above condition.)
1. The temperature of the indoor heat exchanger is extremely low.
2. The connection of the heat exchanger sensor is loose. (The connector is disconnected.) (CN62)
3. The heat exchanger sensor and the P.C. board are defective. (Refer to Table 11-8-1.)
4. The main P.C. board is defective.
6 If the above condition (No. 5) still continues, start the unit in the following condition.
· Set the operation mode to HEAT.
· Set the preset temperature much higher than room temperature.
1. Check whether or not the compressor operates.
2. Check whether or not the OPERATION indicator flashes.
1. The temperature of the indoor heat exchanger is extremely high.
2. The connection of the heat exchanger sensor short-circuited. (CN62)
3. The heat exchanger sensor and the P.C. board are defective. (Refer to Table 11-4-1.)
4. The main P.C. board is defective
7 Connect the motor connector to 1. Check it is impossible to detect
the motor and turn on the power
the voltage (DC 15V) between 3
supply. Start the unit the following and 4 of the motor terminals.
condition.
2. The motor does not operate or
· Set the fan speed level to HIGH.
the fan motor does not rotate
(The unit (compressor) operates with high speed. (But it is
continuously in the above
possible to receive the signal
condition in No. 5.)
from the remote controller.)
3. The motor rotates but vibrates strongly.
1. The indoor fan motor is defective. (Protected operation of P.C. board.)
2. The P.C. board is defective.
3. The connection of the motor connector is loose.
- 87 -
11-8-2. P .C . Board Layout
FILE NO. SVM-19002
+12V GND
[1] Sensor characteristic table
+5V
Resistance value (k )
100
90
80 TD
70
60
50
40
30
20
10
TA, TC, TO, TS, TE
0 0 10 20 30 40 50 60
Temperature (°C)
TD : Discharge temp. sensor TA : Room temp. sensor TC : Heat exchanger temp. sensor TO : Outdoor temp. sensor TS : Suction temp. sensor
TE : Outdoor heat exchanger temp sensor
- 88 -
FILE NO. SVM-19002
11-8-3. Indoor Unit (Other Parts)
No.
Part name
Checking procedure
1 Room temp. (TA) sensor
Disconnect the connector and measure the resistance value with tester.
Heat exchanger (TC) sensor (Normal temp.)
Sensor
Temperature
TA, TC (k)
10°C 20.7
20°C 12.6
25°C 10.0
30°C 7.9
40°C 4.5
2 Remote controller 3 Louver motor
24BYJ48-ST
4 Indoor fan motor
Refer to 11-5-1. (5).
Measure the resistance value of each winding coil by using the tester.
(Under normal temp. 25°C)
Position
Resistance value
White 1 1 Yellow 2 2 Yellow 3 3 Yellow 4 4 Yellow 5 5
1 to 2 1 to 3 1 to 4 1 to 5
200 ± 7%
at 25°C
Refer to 11-5-1. (3) and (4).
11-8-4. OutdoorUnit
1 Compressor Model : KTN150D42UFZ
2 Fan motor Model : WDF-340-A43-1
3 4-Way valve coil Model : SQ-A2522G-000352
Measure the resistance value of each winding by using the tester.
Back
Position
Resistance value
White Red
Red - White White - Black Black - Red
1.82 at 20°C
Measure the resistance value of winding by using the tester.
Red
Position
Resistance value
White
Black
Red - White White - Black Black - Red
33.7 ± 1.7 at 20°C
Measure the resistance value of winding by using the tester.
Resistance value
4 Pulse Modulating Valve (PMV) coil Measure the resistance value of winding by using the tester.
Model : PQ-M10012-000313
COM
1W 5 R 3O
Y GR BL COM 2 6 4
Position Red - White Red - Orange Gray- Yellow Gray- Blue
2210 ± 221 at 20°C
Resistance value 42 to 50 42 to 50 42 to 50 42 to 50 at 20°C
5 Outside air temp. sensor (TO) Discharge temp. sensor (TD) Suction temp. sensor (TS) Exchanger temp. sensor (TE)
Disconnect the connector, and measure resistance value with the tester. (Normal temperature)
Temperature Sensor
TD (k ) TO, TS, TE (k )
10°C 105 20.7
20°C 64 12.6
30°C 41 7.9
40°C 27 4.5
50°C 18 3.4
- 89 -
11-8-5. Checking Method for Each Part
FILE NO. SVM-19002
No.
Part name
1 Electrolytic capacitor (For raising pressure, smoothing)
Checking procedure
1. Turn OFF the power supply breaker. 2. Discharge all three capacitors completely. 3. Check that safety valve at the bottom of capacitor is not broken. 4. Check that vessel is not swollen or exploded. 5. Check that electrolytic liquid does not blow off. 6. Check that the normal charging characteristics are show in
continuity test by the tester.
C07, C08 760µF/400V
Case that product is good
Pointer swings once, and returns slowly. When performing test once again under another polarity, the pointer should return.
2 Converter module
1. Turn OFF the power supply breaker. 2. Discharge all three capacitors completely. 3 Check that the normal rectification characteristics are shown in continuity
test by the tester.
1 2 34
+~~
12 34 (DB01)
Diode check
Tester rod
Resistance value in good product
1
4
2
50k or more
3
4 (0 in trouble)
2
1 3
- 90 -
FILE NO. SVM-19002
11-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad
1. Symptom · Outdoor fan motor does not rotate. · Outdoor fan motor stops within several tens seconds though it started rotating. · Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc. Remote controller check code "02 : Outdoor block, 1A : Outdoor fan drive system error"
2. Cause The following causes are considered when the outdoor fan motor does not normally rotate. 1) Mechanical lock of the outdoor fan motor 2) Winding failure of the outdoor fan motor 3) Position-detect circuit failure inside of the outdoor fan motor 4) Motor drive circuit failure of the outdoor P.C. board
3. How to simply judge whether outdoor fan motor is good or bad
Turn OFF the breaker.
Disconnect two connectors (CN31) of the outdoor fan motor from the outdoor P.C. board.
Does the fan rotate without trouble when rotating it with hands?
YES
If the resistance value between
1 (Red lead)
2 (White lead)
2 (White lead) 3 (Black lead)
3 (Black lead) 1 (Red lead) of the connector
(CN31 : Motor winding)
is 16 to 51, it is normal.
YES
Fan motor is normal. (Outdoor P.C. board error)
NO
CN31
NO
Fan motor error
NOTE : However, GND circuit error inside of the motor may be accepted in some cases when the above check is performed. When the fan motor does not become normal even if P.C. board is replaced, replace the outdoor fan motor.
- 91 -
FILE NO. SVM-19002
12. HOW TO REPLACE THE MAIN PARTS
WARNING
· Since high voltages pass through the electrical parts, turn off the power without fail before proceeding with the repairs. Electric shocks may occur if the power plug is not disconnected.
· After the repairs have been completed (after the front panel and cabinet have been installed), perform a test run, and check for smoking, unusual sounds and other abnormalities. If this check is omitted, a fire and/or electric shocks may occur. Before proceeding with the test run, install the front panel and cabinet.
· Ensure that the following steps are taken when doing repairs on the refrigerating cycle. 1. Do not allow any naked flames in the surrounding area. If a gas stove or other appliance is being used, extinguish the flames before proceeding. If the flames are not extinguished, they may ignite any oil mixed with the refrigerant gas. 2. Do not use welding equipment in an airtight room. Carbon monoxide poisoning may result if the room is not properly ventilated. 3. Do not bring welding equipment near flammable objects. Flames from the equipment may cause the flammable objects to catch fire.
· If keeping the power on is absolutely unavoidable while doing a job such as inspecting the circuitry, wear rubber gloves to avoid contact with the live parts. Electric shocks may be received if the live parts are touched. High-voltage circuits are contained inside this unit. Proceed very carefully when conducting checks since directly touching the parts on the control circuit board may result in electric shocks.
12-1. Indoor Unit
No. Part name
Procedures
Remarks
1 Air inlet grille
1) Stop operation of the air conditioner and turn off its main power supply.
2) Open the air inlet grille and push it up until the air inlet grille take off.
<Remark> If you do not have enough space for push the air inlet grille up until it take off, you can push the arms of air inlet grille toward the outside, and remove the air inlet grille.
Air inlet grille
<To re-installation> - Carry out attaching in the reverse order to
removal. - Keep front panel horizontally and put both
arms into guides. - Make sure both arms are inserted
completely.
- 92 -
No. Part name 2 Air filters
Procedures 1) Follow to the procedure in the item 1 .
FILE NO. SVM-19002
Remarks
Air filters
2) Remove the left and the right air filters from the front panel.
3 Front panel
1) Stop operation of the air conditioner and turn off its main power supply.
2) Open two screw caps and securely remove screws (2 pcs.) at the front panel.
Hooks of front panel
Screw
Front panel Back body
3) Take off the hooks of front panel from top side of the back body.
4) Slightly open the lower part of the front panel then pull the upper part of the front panel toward you to remove it as shown on figure.
Air inlet grille
Screw Screw cap
Front panel Screw cap
- 93 -
FILE NO. SVM-19002
No. Part name 4 Electric part
box assembly
Procedures
1) Follow the procedure item 3 . 2) Remove screw holding the electric part cover.
Remarks
TA sensor Earth line
TC sensor
LN1 2 3
Fan motor connector Louver motor connector
Screw
Electric part cover
Connectors
3) Disconnect the connectors for the fan motor and louver motor from P.C. board assembly.
Washer
Earth screw Earth line
TC sensor Sensor holder
4) Remove the earth screw and earth line from evaporator.
5) Pull out TC sensor from sensor holder of the evaporator.
6) Remove the 2 fixing screws that secures the electric parts box assembly, unit display assembly and remove the electric parts box assembly.
Electric parts box
Screw Unit display
Screw
- 94 -
No. Part name 5 Fan motor
Procedures
1) Follow the procedure item 3 and 4 . 2) Loosen the set screw of the cross flow fan.
Cross flow fan Body back 3.5 mm
FILE NO. SVM-19002
Remarks
Cross flow fan
Set screw Fan motor
3) Remove 2 fixing screws of the motor band. 4) Pull the motor band and the fan motor
outward.
<To re-installation>
- Keep connector position and arrange fan
motor wire follow figure.
Screws
Fan motor connector
Vertical louver
Hexagon screw driver
Motor band
Fan motor
(45°)
Fan motor wire
6 Horizontal louver 1) Remove shaft of the horizontal louver from the back body. (First remove 2 the center shafts then remove the other shafts.)
Drain pan
7 Drain hose
1) Follow the procedure item 3 . 2) The drain hose can be removed by removing
the screw securing the drain hose and then pulling out the drain hose. 3) When removing the drain hose, be careful of any sharp edges of steel plate. The edges can injuries.
Drain pan
Heat insulator of drain pan
Steel plate of drain hose
Drain hose
Screw
<To re-installation> - To install the drain hose, insert the drain hose
firmly until the connection part contacts with heat insulator, and then secure it with original screw.
- 95 -
Horizontal louver Drain pan
Drain hose
No. Part name
8 Drain pan assembly
Procedures
1) Follow the procedure item 3 . 2) Remove screw holding the electric part
cover. 3) Disconnect the louver motor connector (5P)
from P.C. board assembly.
LN1 2 3
P.C.board
Louver motor connector
Louver motor connector
FILE NO. SVM-19002
Remarks
Screw
Electric part cover
Connectors
4) Remove fixing screw of the unit display and remove unit display.
5) Remove drain pan can be selected remove drain hose or not remove drain hose following: - Not remove drain hose Pulling out the drain pan from back body, then holding the drain pan with main unit.
- Remove drain hose; Drain hose can be removed follow the procedure item 7 . After that remove the drain pan from main unit.
Unit display
Screw Drain pan
<To re-installation> - Press the drain pan into the back body. - Please make sure ribs of drain pan in left
and right side must be install to lock position. - Press the two center arms of drain pan to back
body.
Drain pan
Back body
Rib of drain pan Drain pan
Back body
Center arms of drain pan
- 96 -
Back body
Drain pan
Rib of drain pan
FILE NO. SVM-19002
No. Part name 9 Vertical louver assembly
Procedures
1) Follow the procedure item 3 and 8 . 2) Remove 2 fixing screws from the base
vertical louver then remove the vertical louver assembly from the body back.
Remarks
Vertical louver
Screw
Screw
10 Bearing base
1) Follow the procedure item 3 . 2) Remove 4 fixing screws from the bearing
base, then remove it from the main unit.
Bearing base Bearing
<Caution at assembling> - If the bearing is out from the housing, push it
into the specified position, then incorporate it in the main unit.
11 Cross flow fan
1) Follow the procedure item 9 and 10 . 2) Loosen the set screw of the cross flow fan.
3) Lift up the heat exchanger follow the figure. Pull out the left hand side until the cross flow fan released from the shaft of the fan motor and then pull out the lower side of heat exchanger follow the figure.
<To re-installation> 1) To incorporate the fan motor and the motor
into the position in the following figure. - Install the cross flow fan so that the right
end of the 1st joint from the right of the Cross flow fan is keep 3.5mm from closed wall of the main unit.
Cross flow fan
Body back
3.5 mm
Heat exchanger
Bearing base
Cross flow fan
Cross flow fan
Vertical louver Hexagon screw driver Heat exchanger
Cross flow fan
Set screw Fan motor
- Holding the set screw, install the cross flow fan so that flat area on shaft of the fan motor comes to the mounting hole of the set screw.
- 97 -
No. Part name
Procedures
12 Heat exchanger 1) Follow the procedure in item 3 and 4 .
(Evaporator)
2) Remove 3 fixing screws at the upper left
side of the heat exchanger.
FILE NO. SVM-19002
Remarks
Screws
3) Remove 2 fixing screws at the upper and right side of the heat exchanger.
4) Remove the pipe holder from the rear side of the main unit.
5) Pull out the heat exchanger to upper side.
Heat exchanger Back body
Screw
Heat exchanger Pipe holder
Heat exchanger
Screw
<To re-installation> - Keep the back body horizontally and put the
heat exchanger carefully to the back body. - Make sure the heat exchenger can be
assembled with the back body and secure it tightly with screws.
- 98 -
Microcomputer
No.
Part name
Procedure
Common procedure 1) Turn the power supply off to stop the
operation of air-conditioner. 2) Remove the front panel.
· Remove the 2 fixing screws. 3) Remove the electrical part base.
FILE NO. SVM-19002
Remarks Replace terminal block, microcomputer ass'y and the P.C. board ass'y.
- 99 -
FILE NO. SVM-19002
12-2. Outdoor unit
No.
Part name
1 Common procedure
Procedures
1. Detachment NOTE
Wear gloves for this job. Otherwise, you may injure your hands on the parts, etc.
1) Stop operation of the air conditioner, and turn off the main switch of the breaker for air conditioner.
2) Remove the valve cover. (ST2TØ4 × 10L 2 pcs.) · After removing screw, remove the valve cover pulling it downward.
3) Remove cord clamp (ST2TØ4 × 14L 3 pcs.), and then remove connecting cable.
4) Remove the upper cabinet. (ST1TØ4 × 10L 5 pcs.) · After removing screws, remove the upper cabinet pulling it upward.
2. Attachment 1) Attach the water-proof cover.
NOTE The water-proof cover must be attached without fail in order to prevent rain water, etc. from entering inside the indoor unit.
Remarks Upper cabinet
Waterproof cover
Valve cove
2) Attach the upper cabinet. (ST1TØ4 × 10L 5 pcs.)
3) Perform cabling of connecting cable, and attach the cord clamp.
· Fix the cord clamp by tightening the screws (ST2TØ4 x 14L 3 pcs.), fitting 2 concave parts of the cord clamp to each connecting cables.
4) Attach the valve cover. (ST2TØ4 x 10L 2 pcs.)
· Insert the upper part into the square hole of the side cabinet, set hook claws of the valve cover to square holes (at three positions) of the main unit, and attach it pushing upward,
This line shall be pavallel to the front cabinet
These 2 bending parts shall be put inside of a unit by bending these 2 ports.
This part shall be put on the side cabinet.
Fit the corner of the water proof cover to the corner of the front cabinet.
This part shall cover the gap between the inverter box and the front cabinet.
How to mount the water-proof cover
- 100 -
FILE NO. SVM-19002
No.
Part name
2 Front cabinet
Procedures
1. Detachment 1) Perform step 1 in 1.
2) Remove the fixing screws (ST2TØ4 × 10L 2 pcs.) used to secure the front cabinet and inverter cover, the screws (ST2TØ4 × 10L 4 pcs.) used to secure the front cabinet at the bottom, and the fixing screws (ST2TØ4 × 10L 2 pcs.) used to secure the motor base.
· The front cabinet is fitted into the side cabinet (left) at the front left side so pull up the top of the front cabinet to remove it.
2. Attachment 1) Insert the claw on the front left side into the side cabinet (left).
2) Hook the bottom part of the front right side onto the concave section of the bottom plate. Insert the claw of the side cabinet (right) into the square hole in the front cabinet.
3) Return the screws that were removed above to their original positions and attach them.
Remarks
Front cabinet
Claw
Square hole
Concave section
- 101 -
No.
Part name
3 Inverter assembly
FILE NO. SVM-19002
Procedures
1) Perform work of item 1 in 1. 2) Remove screw (ST2TØ4 × 10L 2 pcs.) of the
upper part of the front cabinet.
· If removing the inverter cover in this condition, P.C. board can be checked.
· If there is no space above the unit, perform work of 1 in 2.
Be careful to check the inverter because high-voltage circuit is incorporated in it.
3) Perform discharging by connecting e, d polarity by discharging resistance (approx. 10040W) or plug of soldering iron e to d, terminals a of the C14 (printed "CAUTION HIGH VOLTAGE" is attached.) electrolytic capacitor (760µF or 500µF) on P.C. board.
Be careful to discharge the capacitor because the electrolytic capacitor cannot naturally discharge and voltage remains according to trouble type in some cases.
NOTE This capacitor is one with mass capacity. Therefore, it is dangerous that a large spark generates if short-circuiting between e, d
4) Remove screw (ST2TØ4 x 10L 4pcs.) fixing the terminal part of inverter box to the main body.
5) Remove the front cabinet by performing step 1 in 2, and remove the fixing screws (ST2TØ4 x 10L) for securing the main body and inverter box.
6) Remove various lead wires from the holder at upper part of the inverter box.
7) Pull the inverter box upward. 8) Disconnect connectors of various lead wires.
Requirement As each connector has a lock mechanism, avoid to remove the connector by holding the lead wire, but by holding the connector.
Remarks
Inverter cover
P.C. board (Soldered surface)
Discharging position (Discharging period 10 seconds or more)
Plug of soldering iron
The connector is one with lock, so remove it while pushing the part indicated by an arrow.
Be sure to remove the connector by holding the connector, not by pulling the lead wire.
- 102 -
FILE NO. SVM-19002
No. Part name
Procedure
Remarks
4 Control board 1. Disconnect the leads and connectors connected to
assembly
the other parts from the control board assembly.
1) Leads
· 3 leads (black, white, orange) connected to terminal block.
· Lead connected to compressor : Disconnect the connector (3P).
· Lead connected to reactor : Disconnect the two connectors (2P).
2) Connectors CN31 : Outdoor fan motor (3P: white)* (* : See Note) CN72 : 4-way valve (2P: yellow)* CN61 : TE sensor (2P: white)* CN73 : PMV (6P: white) CN64 : TS sensor (3P: white)* CN62 :TD sensor (3P: white)*
CN31,CN72,CN61,CN73,CN64, CN62 and CN63 are connectors with locking mechanisms: as such, to disconnect them, they must be pressed in the direction of the arrow while pulling them out.
CN63 : TO sensor (2P: white)
NOTE
These connectors have a disconnect prevention mechanism: as such, the lock on their housing must be released before they are disconnected.
2. Remove the control board assembly from the s pacer. (Remove the heat sink and control board assembly while keeping them screwed together.)
3. Remove the two fixing screws used to secure the heat sink and control board assembly.
4. Mount the new control board assembly.
NOTE
When mounting the new control board assembly, ensure that the P.C. board is inserted properly into the spacer support.
P.C. board base P.C. board
- 103 -
No.
Part name
5 Side cabinet
Procedures
1. Side cabinet (right) 1) Perform step 1 in 2 and all the steps in 3. 2) Remove the fixing screw (ST2TØ4 × 10L 4 pcs.) used for securing the side cabinet to the bottom plate and valve fixing panel.
2. Side cabinet (left) 1) Perform step 1 in 2. 2) Remove the fixing screw (ST2TØ4 × 10L 1 pc.) used to secure the side cabinet (left) onto the heat exchanger.
3) Remove the fixing screw (ST2TØ4 × 10L 2 pcs.) used for securing the side cabinet to the bottom plate and heat exchanger.
FILE NO. SVM-19002
Remarks
Hook the claw noto the bottom plate
The back body section hooked onto the bottom plate here.
6 Fan motor
Detail A
Detail B
Detail C
1) Perform work of item 1 of 1 and 2. 2) Remove the flange nut fixing the fan motor and
the propeller.
· Flange nut is loosened by turning clockwise. (To tighten the flange nut, turn counterclockwise.)
3) Remove the propeller fan. 4) Disconnect the connector for fan motor from
the inverter.
5) Remove the fixing screws (3 pcs.) holding by hands so that the fan motor does not fall.
* Precautions when assembling the fan motor Tighten the flange nut using a tightening torque of 4.9 N·m.
Propeller fan Fan motor
Flange nut
- 104 -
No.
Part name
7 Compressor
Procedures
1) Perform work of item 1 of 1 and 2, 3, 4, 5.
2) Extract refrigerant gas.
3) Remove the partition board. (ST2TØ4 × 10L 3 pcs.)
4) Remove the sound-insulation material. 5) Remove terminal cover of the compressor, and
disconnect lead wire of the compressor from the terminal. 6) Remove pipe connected to the compressor with a burner. 7) Remove the fixing screw of the bottom plate and heat exchanger. (ST2TØ4 × 10L 1 pc.) 8) Remove the fixing screw of the bottom plate and valve fixing plate. (ST2TØ4 × 10L 1 pc.)
9) Pull upward the refrigeration cycle.
10) Remove NUT (3 pcs. fixing the compressor to the bottom plate.
FILE NO. SVM-19002
Remarks
Compressor
8 Reactor
1) Perform work of item 1 of 2 and 3.
2) Remove screws fixing the reactors. (ST2TØ4 × 10L 4 pcs.)
Reactor
- 105 -
No.
Part name
9 Electronic expansion valve coil
Procedures
1. Detachment 1) Perform step 1 in 1, 1 in 2 and 1 in 5. 2) Turn the coil by 180 degrees then remove by
pull it upward.
2. Attachment 1) Insert the coil at position which
perpendicular with pipe of PMV then turn the coil by 180 degrees.
Make sure that lead wire of coil is opposite with pipe of PMV
FILE NO. SVM-19002
Remarks
Rotate 180°C
BODY-PMV
COIL-PMV
! Fan Guard
1. Detachment 1) Perform work of item 1 of 2 . 2) Remove the front cabinet, and put it down so that fan guard side directs downward.
Perform work on a corrugated cardboard, cloth, etc. to prevent f aw to the product. 3) Remove the hooking claws by pushing
minus screwdriver according to the arrow mark in the right figure, and remove the fan guard.
2. Attachment 1) Insert claws of the fan guard in the holes of the front cabinet. Push the hooking claws (9 positions) by hands and fix the claws.
Check that all the hooking claws are fixed to the specified positions.
Minus screwdriver Hooking claw
- 106 -
No.
Part name
Procedure
11 TE sensor (Outdoor heat exchanging temperature sensor)
· Attachment With the leads pointing downward and the sensor leads pointing in the direction shown in the figure, install the sensor onto the straight pipe part of the condenser output pipe.
FILE NO. SVM-19002
Remarks
Detail C
12 TS sensor (Suction pipe temperature sensor) · Attachment With its leads pointing downward, point the sensor in the direction of the packed valve, and install it onto the straight pipe part of the suction pipe.
13 TD sensor (Discharge pipe temperature sensor) · Attachment With its leads pointed downward, install the sensor onto the vertical straight pipe part of the discharge pipe.
14 TO sensor (Outside air temperature sensor) · Attachment Insert the outdoor air temperature sensor into the holder and install the holder onto the heat exchanger.
B A
D C
Detail A TS sensor
Detail B TD sensor
Arrow D TO sensor
CAUTION
During the installation work (and on its completion), take care not to damage the coverings of the sensor leads on the edges of the metal plates or other parts. It is dangerous for these coverings to be damaged since damage may cause electric shocks and/or a fire.
CAUTION
After replacing the parts, check whether the positions where the sensors were installed are the proper positions as instructed. The product will not be controlled properly and trouble will result if the sensors have not been installed in their proper positions.
- 107 -
FILE NO. SVM-19002
13. EXPLODED VIEWS AND PARTS LIST
13-1. Indoor Unit
234 221
232 223
233
201 204 203
205 217 216 212 215
206 209
213
222 225
224 214
210
218 220
219
211
ELECTRICAL PARTS ASSEMBLY 202
227 228 226
Location No. 201 202 203 204 205 206 209 210 211 212 213 214 215 216 217
Part No. 43T00717 43T00715 43T09564 43T80351 43T03407 43T22357 43T72342 43T22354 43T70321 43T79322 43T21478 43T21471 43T20357 43T39385 43T22312
Description
FRONT PANEL ASSY CAP SCREW GRILLE OF AIR INLET ASSY AIR FILTER BACK BODY ASSY VERTICAL LOUVER ASSY DRAIN PAN ASSY HORIZONTAL LOUVER DRAIN HOSE DRAIN CAP MOTOR; STEPPING MOTOR FAN CROSS FLOW FAN ASSY BASE BEARING BEARING ASSY, MOLD
Location No. 218 219 220 221 222 223 224 225 226 227 228 232 233 234
Part No. 43T39384 43T39381 43T39382 43T44660 43T19333 43T49045 43T49043 43T82008 43T62360 43T66388 43T83310 43T91333 43T91334 43T91335
Description
MOTOR COVER MOTOR BAND BACK MOTOR BAND FRONT REFRIGERATION CYCLE HOLDER, SENSOR PIPE, SHIELD HOLDER, PIPE PLATE, INSTALLATION TERMINAL COVER ASSY WIRELESS REMOCO HOLDER, REMOTE CONTROL PACKING SLEEVE PACKING CUSHION RIGHT PACKING CUSHION LEFT
- 108 -
13-2. Indoor Unit (Part-E)
FILE NO. SVM-19002
402 404
406
405
407 401 403
Location No. 401 402 403 404
Part No. 43T50324 43T6V673 43T6V674 43T62340
Description
SENSOR; HEAT EXCHANGER TERMINAL(5P-TF) TEMPERATURE SENSOR CORD-CLAMP
Location Part
No.
No.
405 43T6W441
406 43T6W530
407 43T60480
Description
PC BOARD ASSY:WRS-LED PC BOARD HOUSING-WiFi
- 109 -
13-3. Outdoor Unit
FILE NO. SVM-19002
44
4
72
45
2
73
7
43
62 5
20
9 52 21
30 42
25 51
3
70
23
24
1
59
71
8
60
37,41
61
36,40
6
35
63 HOLDER SENSOR (TE) 64 HOLDER SENSOR (TD) 65 HOLDER SENSOR (TS)
Location No. 1 2 3 4 5 6 7 8 20 21 23 24 25 30 35 36 37 40
Part No. 43T42327 43T00459 43T00690 43T00735 43T00688 43T00448 43T39333 43T04366 43T19364 43T20319 43T79305 43T00691 43T63376 43T43591 43T41527 43T47403 43T47405 43T46435
Description
BASE PLATE ASSEMBLY LEFT CABINET RIGHT CABINET ASSEMBLY UPPER CABINET ASSEMBLY FRONT CABINET ASSEMBLY FIXING PLATE VALVE MOTOR BASE CONNECTION PLATE GUIDE WIND PARTITION ASSEMBLY FAN GUARD PROPELLER FAN DRAIN NIPPLE PACKED VALVE COVER ASSEMBLY HOLDER, SENSOR CONDENSER ASSEMBLY COMPRESSOR BONNET, 6.35 DIA BONNET, 12.7 DIA VALVE; PACKED 6.35 DIA
Location No. 41 42 43 44 45 51 52 59 60 61 62 63 64 65 70 71 72 73
Part No. 43T46461 43T46469 43T63360 43T46367 43T63327 43T58306 43T21460 43T60494 43T97001 43T49335 43T47001 43T63318 43T63317 43T63316 43T91343 43T91342 43T91314 43T91301
Description
VALVE; PACKED 12.7 DIA BODY PMV COIL PMV 4 WAY VALVE COIL-4WAY REACTOR FAN MOTOR LEAD ASSY, COMPRESSOR NUT RUBBER CUSHION NUT FLANGE HOLDER SENSOR HOLDER,SENSOR HOLDER,SENSOR CARTON BOX FIBERBOARD UNDER ASSEMBLY CUSHION-PKG-UPR PE SHEET
- 110 -
13-4. Outdoor Unit (Part-E)
FILE NO. SVM-19002
702 709 701
704
708 707 706
703
705
TE Sensor (Ø6) TO Sensor (Ø6) TS Sensor (Ø6) TD Sensor (Ø4)
Location Part
No.
No.
701 43T67310
702 43T6W512
703 43T60392
704 43T60326
705 43T50369
Description
HEATSINK PC BOARD TERMINAL-5P FUSE TEMPERATURE SENSOR
Location No. 706 707 708 709
Part No. 43T50336 43T50360 43T50371 43T62313
Description
TEMPERATURE SENSOR TC-SENSOR(TO) TEMPERATURE SENSOR PC PLATE BASE
- 111 -
144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANG, PATHUMTHANI 12000, THAILAND.