Friedrich Sm18N30 Users Manual

SS15N30* to the manual 45ff98b9-ea79-42b4-b7d9-36fc6981d945

2015-02-02

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2012 Service/Parts
ServiceManual
Manual

Room Air Conditioners

AUTO FAN
CONTINUOUS
AUTO

C F

AUTO
AUTO
SYSTEM
CONTINUOUS

°F °C
FAN MODE

AUTO

POWER

FAN SPEED

SYSTEM

SCHEDULE

FAN MODE

FAN SPEED

Standard Chassis Models

Cool

Cool Only
Only
115-Volt: SS08N10*,
115-Volt:
SS10N10*,
SS12N10*,
SS08M10, SS10M10,
SS12M10,
SS14M10SS14N10*, SM15N10*
208-230-Volt: SS12N30*,
208-230-Volt:
SS15N30*,
SM18N30*,
SM21N30*
SS12M30, SS15M30,
SM18M30,
SM21M30
SM24N30*,SL22N30*, SL24N30*, SL28N30*, SL36N30*
Coolwith
withElectric
Electric Heat
Cool
208-230-Volt:
208-230-Volt: ES12N33*, ES15N33*, EM18N34*, EM24N34*, EL36N35*

Electric Heat

Heat
HeatPump
Pumpwith
withElectric
Electric Heat
208-230-Volt:
208-230-Volt: YS12N33*, YM18N34*, YL24N35*

Heat Pump

Kuhl-Serv/PartsMan (9-12)

Heat Pump
115-Volt: YS10N10*
115-Volt:
*Last character may vary

93001402_00

Table Of Contents
Important Safety Information ..................................................................................................................................... 2-4
Introduction ................................................................................................................................................................... 5
Model and Serial Number Location .............................................................................................................................. 5
Unit Identification .......................................................................................................................................................... 6
Performance Data and Specifications .......................................................................................................................... 7
Installation Information/Sleeve Dimensions/Circuit Rating ........................................................................................... 8
Electrical Data ............................................................................................................................................................... 9
Before Operating the Unit ............................................................................................................................................10
Kuhl Control Options ....................................................................................................................................................11
Control Panel and Display Identification ......................................................................................................................12
Control Panel Operation Instructions ......................................................................................................................13-19
Remote Control Operation ...................................................................................................................................... 20-21
Unit Operation ............................................................................................................................................................ 22
Electronic Control Sequence of Operation ............................................................................................................ 23-27
Fan Operation ............................................................................................................................................................. 28
Removing the Front Cover and Unit Chassis ................................................................................................................ 29
Replacing the ID Coil Thermistor ................................................................................................................................ 30
Replacing the Control Board ....................................................................................................................................... 30
Airflow Selection and Adjustment ............................................................................................................................... 31
Components Testing .............................................................................................................................................. 32-33
Testing the User Interface and Control Board ........................................................................................................... 34
.
.
Refrigeration Sequence of Operation .......................................................................................................................... 35
R410A Sealed System Repair Considerations ........................................................................................................... 36
Sealed Refrigeration System Repairs .................................................................................................................... 37-40
Hermetics Components Check ................................................................................................................................... 41
Reversing Valve Description/Operation ...................................................................................................................... 42
Testing the Coil ........................................................................................................................................................... 43
Checking the Reversing Valve ............................................................................................................................... 43-44
Compressor Checks .............................................................................................................................................. 45-46
Compressor Replacement ..................................................................................................................................... 47-48
Routine Maintenance ............................................................................................................................................. 49-52
Service and Assistance/Avalaible Accessories .......................................................................................................... 53
How to Check and Erase the Diagnostic Codes ........................................................................................................... 54
Error Codes and Alarm Status .................................................................................................................................... 55
Test Mode ................................................................................................................................................................... 56
Thermistors' Resistance Values .................................................................................................................................. 57
Performance Test Data Sheet ..................................................................................................................................... 58
Troubleshooting ..................................................................................................................................................... 59-68
Electronic Control Board Components Identification & Thermistor Voltage ................................................................... 69
Electronic Control Configuration Instructions .............................................................................................................. 70
Wiring Diagrams .................................................................................................................................................... 71-79
Remote Control Replacement Instructions ........................................................................................................... 80-81
User Interface Service Kit ........................................................................................................................................... 82
Parts Section ......................................................................................................................................................... 83-90
Addendum 1 ............................................................................................................................................................... 91
Warranty ...................................................................................................................................................................... 92
Authorized Parts Depots .............................................................................................................................................. 93
Technical Support Contact Information.........................................................................................................................93
1

IMPORTANT SAFETY INFORMATION
The information contained in this manual is intended for use by a qualified service technician who is familiar
with the safety procedures required for installation and repair, and who is equipped with the proper tools
and test instruments required to service this product.
Installation or repairs made by unqualified persons can result in subjecting the unqualified person making
such repairs as well as the persons being served by the equipment to hazards resulting in injury or
electrical shock which can be serious or even fatal.
Safety warnings have been placed throughout this manual to alert you to potential hazards that may be
encountered. If you install or perform service on equipment, it is your responsibility to read and obey these
warnings to guard against any bodily injury or property damage which may result to you or others.

Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance. Always read
and obey all safety messages.
This is a Safety Alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol with the word “WARNING”
or “CAUTION”. These words mean:

WARNING

You can be killed or seriously injured if you do not follow instructions.

CAUTION

You can receive minor or moderate injury if you do not follow instructions.

All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury,
and tell you what will happen if the instructions are not followed.

NOTICE

A message to alert you of potential property damage will have the
word “NOTICE”. Potential property damage can occur if instructions
are not followed.

PERSONAL INJURY OR DEATH HAZARDS
ELECTRICAL HAZARDS:

•

Unplug and/or disconnect all electrical power to the unit before performing inspections,
maintenance, or service.

•

Make sure to follow proper lockout/tag out procedures.

•

Always work in the company of a qualified assistant if possible.

•

Capacitors, even when disconnected from the electrical power source, retain an electrical charge
potential capable of causing electric shock or electrocution.

•

Handle, discharge, and test capacitors according to safe, established, standards, and approved
procedures.

•

Extreme care, proper judgment, and safety procedures must be exercised if it becomes necessary
to test or troubleshoot equipment with the power on to the unit.

•

Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel,
and sleeve on the room side of the air conditioning unit while cleaning.

•

Electrical component malfunction caused by water could result in electric shock or other electrically
unsafe conditions when the power is restored and the unit is turned on, even after the exterior is dry.

•

Never operate the A/C unit with wet hands.

•

Use air conditioner on a single dedicated circuit within the specified amperage rating.

•

Use on a properly grounded outlet only.

•

Do not remove ground prong of plug.

•

Do not cut or modify the power supply cord.

•

Do not use extension cords with the unit.

•

Follow all safety precautions and use proper and adequate protective safety aids such as: gloves,
goggles, clothing, adequately insulated tools, and testing equipment etc.

•

Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.

REFRIGERATION SYSTEM REPAIR HAZARDS:
•

Use approved standard refrigerant recovering procedures and equipment to relieve pressure before
opening system for repair.

•

Do not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor
to moderate injury.

•

Be extremely careful when using an oxy-acetylene torch. Direct contact with the torch’s flame or hot
surfaces can cause serious burns.

•

Make sure to protect personal and surrounding property with fire proof materials.

•

Have a fire extinguisher at hand while using a torch.

•

Provide adequate ventilation to vent off toxic fumes, and work with a qualified assistant whenever
possible.

•

Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for
leaks, flushing etc.

•

Make sure to follow all safety precautions and to use proper protective safety aids such as: gloves,
safety glasses, clothing etc.

•

Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.

MECHANICAL HAZARDS:

•

Extreme care, proper judgment and all safety procedures must be followed when testing,
troubleshooting, handling, or working around unit with moving and/or rotating parts.

•

Be careful when, handling and working around exposed edges and corners of the sleeve, chassis,
and other unit components especially the sharp fins of the indoor and outdoor coils.

•

Use proper and adequate protective aids such as: gloves, clothing, safety glasses etc.

•

Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.

PROPERTY DAMAGE HAZARDS
FIRE DAMAGE HAZARDS:
•

Read the Installation/Operation Manual for the air conditioning unit prior to operating.

•

Use air conditioner on a single dedicated circuit within the specified amperage rating.

•

Connect to a properly grounded outlet only.

•

Do not remove ground prong of plug.

•

Do not cut or modify the power supply cord.

•

Do not use extension cords with the unit.

•

Be extremely careful when using acetylene torch and protect surrounding property.

•

Failure to follow these instructions can result in fire and minor to serious property damage.

WATER DAMAGE HAZARDS:

•

Improper installation, maintenance or servicing of the air conditioner unit can result in water damage
to personal items or property.

•

Insure that the unit has a sufficient pitch to the outside to allow water to drain from the unit.

•

Do not drill holes in the bottom of the drain pan or the underside of the unit.

•

Failure to follow these instructions can result in damage to the unit and/or minor to serious property
damage.

INTRODUCTION
This service manual is designed to be used in conjunction with the installation and operation manuals provided with
each air conditioning system.
This service manual was written to assist the professional RAC (Room Air Conditioner) service technician to quickly
and accurately diagnose and repair malfunctions.
This manual will deal with subjects in a general nature.

COMPONENTS IDENTIFICATION
Accumulator
Compressor
Fresh Air Vent

Outdoor Grille
Discharge Air
Shroud brace

Reversing Valve

Condense/Fan Shroud

Evaporator Coil

Condenser Coil

Electronic Control
Board

Sleeve

Control Key Pad
Support Bar

Air Intake Vents

Blower Wheel
Air Intake From
Sides and Bottom
Control Key Pad
(User Interface)

Fan Blade
Fan/Blower Motor
Base Pan
Chassis Pull
Out Handle

IMPORTANT: It will be necessary for you to accurately identify the unit you are servicing, so you can be certain of a
proper diagnosis and repair (See Unit Identification code on page 6).

MODEL AND SERIAL NUMBER LOCATION
Register your air conditioner
Model information can be found on the name
plate behind the front cover.
For your future convenience, record the model
information here.
MODEL NUMBER

SERIAL NUMBER

PURCHASE DATE

UNIT IDENTIFICATION

Model Number Code
MODEL NUMBER
AIR CONDITIONING CO. YS10M10A
SAN ANTONIO, TEXAS SERIAL NUMBER
ASSEMBLED IN MEXICO LICY00008

VOLTS 115
60 HZ / 1 PH
VOLTS MIN 108

COOLING
HEATING
BTH/HR 6500 BTH/HR 6500
EER 12.0
EER 10.4
AMPS 8.0
AMPS 7.0

REFRIGERANT XXXXXXXXX
30.1 OZ R410A 600 PSIG HS
300 PSIG LS

XXXXXXXXXX
XXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX

FUSE PROTECTED
CIRCUITS USE 15A
TIME DELAY FUSE

X
XX
XXXXX
XXXXXXXXXX

MODEL NUMBER
AIR CONDITIONING CO. YS10M10A
SAN ANTONIO, TEXAS SERIAL NUMBER
ASSEMBLED IN MEXICO LICY00008

S S 08 M 1 0 B A
9th Digit, Engineering Suffix
Major modification
Subject to change

1st Digit – Function
S = Straight Cool, Value Series
Y = Heat Pump
E = Electric Heat

8th Digit, Marketing Suffix
Indicates modification
Subject to change

7th Digit – Options
0 = Straight Cool &
Heat Pump Models
3 = 3 KW Heat Strip, Nominal
4 = 4 KW Heat Strip, Nominal
5 = 5 KW Heat Strip, Nominal

2nd Digit
S = Small Chassis
M = Medium Chassis
L = Large Chassis

6th Digit – Voltage
1 = 115 Volts
3 = 230-208 Volts

3rd and 4th Digit - Approximate
BTU/HR in 1000s (Cooling)
Heating BTU/Hr capacity listed in the
Specification/Performance Data Section

5th Digit
Alphabetical Modifier

RAC Serial Number Identification Guide
Serial Number
Decade Manufactured
L=0
C=3 F=6 J=9
A=1
D=4 G=7
B=2 E=5 H=8
Year Manufactured
A=1
D=4 G=7
B=2 E=5 H=8
C=3 F=6 J=9

K=0

Month Manufactured
A=Jan D=Apr G=Jul K=Oct
B=Feb E=May H=Aug L=Nov
C=Mar F=Jun J=Sept M=Dec
6

00001
Production Run Number

Product Line

R = RAC

REFRIGERATION SYSTEM PERFORMANCE DATA
EVAP. AIR TEMP. DEG.
CONDENSER
F
Temp. TEMP DEG. F
Discharge Air
Drop F.
54
26
114
59
21
115
54
26
114
56
24
119
55
25
120
47
33
114
47
33
114
61
19
118
54
26
119
54
26
119
55
25
118
57
23
120
57
23
120
48
32
118
60
20
123
45
35
127
45
35
127
58
22
119
54
26
119
54
26
123
54
26
122
52
28
130
52
28
130

COOLING
PERFORMANCE
DATA*
SS08N10-A
YS10N10-A
SS10N10-A
SS12N10-A
SS14N10-A
SS12N30-A
ES12N33-A
YS12N30-A
SS15N30-A
ES15N33-A
SM15N10-A
SM18N30-A
EM18N34-A
YM18N34-A
SM21N30-A
SM24N30-A
EM24N34-A
YL24N35-A
SL22N30-A
SL24N30-A
SL28N30-A
SL36N30-A
EL36N35-A

Discharge Suction
Super Heat
Temp
Temp
153
155
157
170
171
155
155
169
174
174
153
169
169
169
175
175
175
174
159
163
173
190
190

65
67
68
60
62
58
58
69
59
59
58
61
61
53
65
50
50
64
59
58
60
56
56

7
12
16
14
14
10
10
18
12
12
10
14
14
10
10
10
10
22
10
16
11
13
13

SubCooling

OPERATING
PRESSURES

Amps
Cool
6.1
7.8
7.7
10.0
12.0
4.8
4.8
5.2
6.4
6.4
12.6
7.4
7.4
8.5
9.4
11.2
11.2
11.1
9.4
11.2
12.7
18.0
18.0

Suction Discharge

19
14
17
25
23
18
18
21
34
34
18
22
22
21
20
28
28
20
20
19
26
33
33

151
147
137
135
141
134
135
137
127
127
140
136
136
126
130
119
119
124
139
132
139
126
126

R-410A
REF.
Locked Rotor Charge in
Amps
OZ.
32.0
26.0
50.0
26.5
50.0
27.0
55.0
30.0
63.0
31.0
30.0
31.5
30.0
31.5
26.0
32.0
32.0
33.5
32.0
33.5
63.0
37.0
42.0
39.5
42.0
39.5
44.0
40.0
46.0
40.0
60.5
43.6
60.5
43.5
47.0
73.0
48.0
57.0
47.0
69.0
60.0
70.5
88.0
72.0
88.0
72.0

ELECTRICAL RATINGS

400
395
392
423
390
393
393
413
420
420
410
422
422
413
448
457
457
417
409
435
445
480
480

Amps
Heat
7.6

16.0
5.6
16.0

19.5
8.5

19.5
12.2

24.0

BREAKER
FUSE
60 Hertz
Amps
15
15
15
15
15
15
20
20
15
20
15
15
30
30
15
20
30
30
15
20
20
30
30

Voltage
115
115
115
115
115
230/208v
230/208v
230/208v
230/208v
230/208v
115
230/208v
230/208v
230/208v
230/208v
230/208v
230/208v
230/208v
230/208v
230/208v
230/208v
230/208v
230/208v

*Rating Conditions: 80 degrees F, room air temp. & 50% relative humidity, with 95 degree F, outside air temp & 40% relative humidity, all
systems use R-410A. Test done at highest unit fan speed.

SPECIFICATIONS

ENERGY STAR® models
Energy

MODEL
Kühl

Cooling
Amps

Cooling
Watts

Heating
Amps

Heating
Watts

Ratio
EER

Estimated
Yearly
Operating
Cost

COP

Moisture
Removal Pints/HR

CFM

Sleeve

Cooling Btu

Heating Btu

Volts
Rated

7900

115

6.1

677

11.7

$54

1.0

265

9500

115

7.7

848

11.2

$67

2.0

260

12000

115

10.0

1111

10.8

$88

3.0

14000

115

12.0

1444

9.7

$115

3.5

Net
Wt

Ship
Wt.

121

106

136

300

112

136

325

116

133

SS08N10

*
* SS10N10
* SS12N10
SS14N10

* SS12N30
SS15N30

* SM15N10
* SM18N30
* SM21N30

SM24N30

* SL22N30
* SL24N30
* SL28N30
SL36N30

11500/11200

230/208

4.8/4.9

1055/1027

10.9/10.9

$84

2.8

275

112

134

14500/14300

230/208

6.4/6.8

1480/1459

9.8/9.8

$112

3.5

360

116

136

14800

115

12.0

1358

10.9

$109

3.5

360

141

154

17500/17200

230/208

7.4/8.0

1635/1607

10.7/10.7

$131

4.6

350

140

158

20500/20000

230/208

9.4/10.3

2181/2128

9.4/9.4

$173

6.0

425

132

153

22300/22000

230/208

11.2/11.9

2590/2550

8.6/8.6

$206

10.0

390

152

167

21000/20500

230/208

9.6/10.2

2188/2092

9.6/9.8

$174

6.0

625

191

212

24000/23800

230/208

11.2/12.0

2553/2532

9.4/9.4

$207

7.0

640

192

213

27500/27000

230/208

13.5/14.4

2926/2872

9.4/9.4

$229

8.5

600

193

214

36000/35700

230/208

19.0/20.5

4235/4200

8.5/8.5

$338

12.0

725

212

227

Kühl + Heat Pump
®

*
*
*
*

YS10N10*

9400

7500

115

7.8

855

7.6

743

11.0

$68

3.0

1.9

285

109

131

YS12N33

11500/11300

9400/9000

230/208

5.2/5.4

1095/1076

5.6/5.8

1132/1139

10.5/10.5

$87

2.4/2.3

3.0

265

115

136

YM18N34

18200/17800

17900/17700

230/208

8.5/8.9

1808/1788

8.5/8.7

1833/1761

9.9/9.9

$147

2.5/2.6

5.4

370

141

152

YL24N35

23500/23000

230/208

11.1/12.0

2500/2447

12.2/14.3

2610/2575

9.4/9.4

$199

2.6/2.6

7.0

600

197

212

Kühl + Electric Heat
®

ES12N33

11500/11200

10700/8900

230/208

4.8/4.9

1055/1027

16.0/14.7

3500/2900

10.9/10.9

$84

2.8

275

113

128

ES15N33

14500/14300

10700/8900

230/208

6.4/6.8

1480/1459

16.0/14.7

3500/2900

9.8/9.8

$112

3.5

360

117

133

EM18N34

17500/17200

13000/10600

230/208

7.4/8.0

2590/2550

19.5/17.0

4200/3500

8.6/8.6

$131

4.6

350

141

158

EM24N34

22300/22000

13000/10600

230/208

11.2/11.9

2590/2550

19.5/17.0

4200/3500

8.6/8.6

$207

10.0

390

153

166

EL36N35

36000/35700

17300/14300

230/208

19.0/20.5

4235/4200

24.0/22.4

5500/4650

8.5/8.5

$338

12.0

725

213

225

* Operates on 115 volt and is not equipped with supplemental heat. Will not provide heat at temperatures below 40°F.
Friedrich room air conditioners are designed to operate in outdoor temperatures from 60° F to 115° F.
Kühl+ Heat Pump heating information (shown in red) indicates heat pump performance. Kühl+ and Chill+ Electric Heat heating information
(shown in red) indicates electric heat strip performance. For Kühl+ Heat Pump electric heating performance refer to corresponding Kühl+
Electric Heat model.
As an ENERGY STAR® partner, Friedrich Air Conditioning Co. has determined that the selected ENERGY STAR ® models meet the
ENERGY STAR®

R-410A

All models use
environmentally
friendly R-410A
refrigerant.

Estimated yearly operating cost based on a 2007 national average electricity cost of 10.65 cents per kWh.

LISTED

ROOM AIR CONDITIONERS

Installation Information / Sleeve Dimensions
Sleeve

Height

Width

15 15/16 "

25 15/16 "

15/16 "

3/16"

28"

Thru-the-wall Installation
Finished Hole

Depth Shell Depth to Minimum
Louvers
with Front
Extension
Into Room*

Minimum
Extension
Outside*

Height

Width

29"

8 ¾"

5 ¾”

16 15/16 ”

27 3/8"

42"

16 3/16”

26 3/16”

7 3/8"

29"

8 ¾"

5 ¾”

15/16 ”

3/8 "

42"

3/16”

7 3/8 ”

35 ½”

16 ½"

15/16 ”

7/8 ”

3/8 "

3/8 ”

Window Width
Minimum** Maximum

42"

3/16”

28 ¼"

Max. Depth

15 1/8 ”

* Minimum extensions when mounted in a window.

** Minimum widths achieved using one side curtain assembly as opposed to both in a standard installation.
NOTE: S,M and L sleeves may be installed in window with no side kits if properly installed.

Circuit Rating/ Breaker
(C)

Circuit Rating
Breaker or
T-D Fuse

Plug
Face
(NEMA#)

Power Cord
Length (ft.)

SS08N10, SS10N10, SS12N10 and
SS14N10, SM15N10, YS10N10

125V - 15A

5 - 15P

SS12N30, SS15N30, SM18N30 and
SM21N30, SL22N30

250V - 15A

6 - 15P

SM24N30, SL24N30,SL28N30,
ES12N33, ES15N33, YS12N33

250V - 20A

6 - 20P

250V - 30A

6 - 30P

Model

SL36N30, EM18N34, EM24N34,
EL36N35, YM18N34 and YL24N35

Wall Outlet
Appearance

Front
(B)

SIDE VIEW

For the best cooling performance and highest energy efficiency
Keep the filter clean

Make sure that your air conditioner is always in top performing condition
by cleaning the filter regularly.

Provide good air flow

Make sure the airflow to and from the unit is clear. Your air conditioner puts the
conditioned air out at the top of the unit, and takes in unconditioned air at the
bottom. Airflow is critical to good operation. It is just as important on the outside
of the building that the airflow around the unit exterior is not blocked.

Unit placement

If your air conditioner can be placed in a window or wall that is shaded by a tree
or another building, the unit will operate even more efficiently. Using drapes or
blinds on the sunny side of the dwelling will also add to your unit’s efficiency.

Insulation

Good insulation will be a big help in maintaining desirable comfort levels.
Doors should have weather stripping. Be sure to caulk around doors and
windows.

Proper installation of seal gasket

Make sure the seal gasket has been installed properly to minimize noise
and improve efﬁciency. If the seal gasket has not been installed, please
refer to the installation instructions.

ELECTRICAL DATA

WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
All electrical connections and wiring MUST be
installed by a qualified electrician and conform to
the National Electrical Code and all local codes
which have jurisdiction.
Failure to do so can result in personal injury or
death.

NOTICE
FIRE HAZARD
Not following the above WARNING could result in fire or
electically unsafe conditions which could cause moderate
or serious property damage.
Read, understand and follow the above warning.

Wire Size

Use ONLY wiring size recommended for single outlet branch circuit.

Fuse/Circuit Breaker

Use ONLY the correct HACR type and size fuse/circuit breaker. Read electrical ratings on unit’s
rating plate. Proper circuit protection is the responsibiity of the homeowner.

Grounding

Unit MUST be grounded from branch circuit through service cord to unit, or through separate
ground wire provided on permanently connected units. Be sure that branch circuit or general
purpose outlet is grounded.

Receptacle

The field supplied outlet must match plug on service cord and be within reach of service cord.
Do NOT alter the service cord or plug. Do NOT use an extension cord. Refer to the table above
for proper receptacle and fuse type.

The consumer - through the AHAM Room Air Conditioner Certification Program - can
be certain that the AHAM Certification Seal accurately states the unit’s cooling and
heating capacity rating, the amperes and the energy efficiency ratio.
*HACR: Heating Air Conditioning and Refrigeration

LISTED

WARNING
Electrical Shock Hazard
Make sure your electrical receptacle has the
same configuration as your air conditioner’s
plug. If different, consult a Licensed Electrician.
Do not use plug adapters.
Do not use an extension cord.
Do not remove ground prong.
Always plug into a grounded 3 prong oulet.
Failure to follow these instructions can result in
death, fire, or electrical shock.

If you have fuses, they should be of the time delay type. Before you install
or relocate this unit, be sure that the amperage rating of the circuit breaker
or time delay fuse does not exceed the amp rating listed in Table 1.

The cord provided will carry the proper amount of electrical power to the
unit; an extension cord may not.

Proper grounding must be maintained at all times. Two prong receptacles
The grounded receptacle should meet all national and local codes and
ordinances. You must use the three prong plug furnished with the air
conditioner. Under no circumstances should you remove the ground
prong from the plug.

All Friedrich room air conditioners are shipped from the factory with a
Leakage Current Detection Interrupter (LCDI) equipped power cord. The
LCDI device on the end of the cord meets the UL and NEC requirements
for cord connected air conditioners.
To test your power supply cord:
1.

Plug power supply cord into a grounded 3 prong outlet.

Press RESET (See Figure 1).

Press TEST, listen for click; the RESET button trips and pops out.

Press and release RESET (Listen for click; RESET button latches
and remains in). The power cord is ready for use.

NOTICE
Do not use the LCDI device as an ON/OFF switch.
Failure to adhere to this precaution may cause
premature equipment malfunction.
Once plugged in, the unit will operate normally without the need to reset
the LCDI device. If the LCDI device fails to trip when tested or if the power
supply cord is damaged, it must be replaced with a new power supply cord
from the manufacturer. Contact our Technical Assistance Line at (800)
541-6645. To expedite service, please have your model number available.
Table 1.
CIRCUIT RATING
OR TIME DELAY
FUSE

MODEL

REQUIRED
WALL
RECEPTACLE

AMP

VOLT

NEMA
NO.

SS08N10, SS10N10,
SS12N10, SS14N10,
SM15N10, YS10M10

125

5-15R

SS12N30, SS15N30,
SM18N30, SM21N30
SL22N30

250

6-15R

SL24N30, SL28N30,
ES12N33, ES15N33,
YS12N33

250

6-20R

SL36N30, EM18N34,
EL36N35, EM24N34,
YM18N34, YL24N35

250

6-30R

Figure 1
RESET

TEST
TEST
RESET

WARNING

TEST BEFORE EACH USE
1. PRESS RESET BUTTON
2. PLUG LCDI INTO POWER
RECEPTACLE
3. PRESS TEST BUTTON,
RESET BUTTON SHOULD
POP UP
4. PRESS TEST BUTTON,
FOR USE
DO NOT USE IF ABOVE TEST
FAILS
WHEN GREEN LIGHT IS ON
IT IS WORKING PROPERLY

WARNING

Note: in case of power failure, unit will resume operation
according to the last input settings.

15/20A LCDI Device

30A LCDI Device
FRR001

Kühl Control Options

Kuhl Control Options

The Kühl gives you a variety of options for control, programming, and
scheduling including wireless capabilities

Wireless Programming and Control:

The new FriedrichLink™ Adapter (sold seperately) allows you to conviently
control, program and monitor your air conditioning unit remotely from a
smartphone or computer.

FriedrichLink™ Adapter accessory available through Friedrich authorized
retailers or www.friedrich.com. See FriedrichLink™ Adapter section on
www.friedrich.com for complete details.

Pre-Programmed Scheduling Options:
Your unit’s digital control comes equipped with a 24-hour timer and two preprogrammed 7-day energy management options.
24-Hour Timer
The 24-hour timer allows you to turn the unit off and on at pre-set times by
setting an on and off time on the unit control panel. (See page 11 for details on
timer set-up.)
Pre-programmed Energy Management
Your unit comes from the factory with two (2) Pre-programmed Energy
Management settings are shown in Addendum 1 (Residential & Commercial
Schedule Table).
Energy Management Schedule Options are:
1.

Residential Schedule – 40 Hr. Work Week

Commercial Schedule – 7-Day Business Week

The “Residential” (40 Hr. Work Week) Schedule has four (4) time periods: 06:00,
08:00, 18:00, and 22:00. This option will cause your Kühl Q unit to raise the room
temperature temporarily to 85°F during the hours when most people are away
at work, lower them again to 78°F prior to the time when most people will return
home, and then raise slightly to 82°F to maintain a comfortable temperature
overnight.
The “Commercial” (7-Day Business Week) Schedule has two (2) time periods:
07:00 and 18:00. This option will cause your air conditioner to raise temperatures
to 84°F after typical working hours and on weekends when commercial spaces
are typically unoccupied.
(See Control Panel Operation Instructions Section)

Customizable Programming Options:
Customizable schedules, with up to four temperature adjustments per day, can
either be uploaded to the unit via the air conditioner’s built-in micro USB interface
or conveniently transmitted wirelessly using the new FriedrichLink™ Adapter
accessory, greatly simplifying the programming of one or multiple units.
See Figure 2.
See www.friedrich.com for complete Customizable
Programming instructions.

Smart Grid
The Kuhl Unit is also able to be controlled by a Smart Grid.
Smart Grid is a network that brings electricity from power stations to
consumers using new technologies that allow power companies to adjust
electrical loads of residential users. Check with your local electric company
to learn more about Smart Grid programs in your area.

Figure 2

MODEL NUMBER
AIR CONDITIONING CO. YS10M10A
SAN ANTONIO, TEXAS SERIAL NUMBER
ASSEMBLED IN MEXICO LICY00008

FriedrichLink™ Adapter

VOLTS 115
60 HZ / 1 PH
VOLTS MIN 108

HEATING
COOLING
BTH/HR 6500 BTH/HR 6500
EER 10.4
EER 12.0
AMPS 7.0
AMPS 8.0

REFRIGERANT XXXXXXXXX
30.1 OZ R410A 600 PSIG HS
300 PSIG LS

XXXXXXXXXX
XXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX

FUSE PROTECTED
CIRCUITS USE 15A
TIME DELAY FUSE

XX
XXXXX
XXXXXXXXXX

Control Panel and Display Identification
Let’s check out how to control your air conditioner. On the control panel, just above the POWER , is a liquid crystal display (LCD). All of the control panel function
buttons and mode icons can be viewed in Figure 3.
Power On – Press the button to turn on the air conditioner. The power button illuminates to indicate that the power is on. The backlight on the power switch
will automatically dim to 20% intensity after 15 seconds of inactivity. The remote control can also be used to turn power ON / OFF (See Remote Control).
Display
inactivity, the display dims to 20% intensity. After an additional 120 seconds, the display switches off. Touching any button automatically changes the display
to full brightness.
There are three control push buttons on each side of the display.
Figure 3
SYSTEM

FAN MODE

Cycles between Sets fan to either:
AUTO, HEAT,
- Cycle automatically
COOL, or FAN - Run continuously
ONLY
(if equipped)

FAN SPEED

TEMPERATURE
Increment UP

Sets fan speed:
LOW, MED,
HIGH or AUTO
(if equipped)

TIMER / SCHEDULE

Turns ON or OFF

TEMPERATURE:

:
IR WINDOW
Do not block

Increment DOWN

ON / OFF

Turns unit on/off

SYSTEM
F

FAN
MODE
SET POINT

FAN
SPEED

TIMER

AUTO SPEED

SCHEDULE

COOL

HEAT

FAN
ONLY

CONTROL
LOCKED
WI-FI
OPERATING
(if equipped)

AUTO

Automatically switches
between cool & heat

WAIT

(3 minutes compressor time delay)

AUTO

F
C

AUTO FAN
CONTINUOUS

AM
PM

SET POINT
ROOM TEMP

FAN SPEED

Manually selected
fan speed

AUTO SPEED

AUTO SPEED
Automatically selects
best fan cooling or
heating speed

ON OFF
SCHEDULE

CHECK $MART
FILTER

FILTER

$MART OPERATING

Check / Clean (if equipped)

2 DIGIT DISPLAY

Shows Setting for:
- Set Point (Temperature)
- Room Temperature
- Clock (AM/PM)

SCHEDULE ON
TIMER ON

Control Panel Operation Instructions

SYSTEM - The
button allows you to sequentially select the modes
of operation. To select, press once and let go.

FAN MODE – The
button allows you to select between
CONTINUOUS modes. To select, press once and let go.
FAN
MODE

AUTO FAN

and

SYSTEM

AUTO MODE

Automatically changes between HEAT and COOL
(HEAT and COOL ONLY Units)

COOL MODE

HEAT MODE

Not available on some models

AUTO FAN

FAN ONLY MODE
AUTO MODE COOL

- AUTO -

SET POINT

FRR112

AUTO FAN

When in the AUTO FAN mode, the fan operates only when the system has
a demand to cool or heat the room. Note: the fan is off (no fan speed icon),
indicating no command for cooling or heating.

SET POINT

AUTO FAN (Cooling Demand)
FRR204

COOL ONLY MODE

F
F

AUTO FAN

AUTO FAN
SET POINT

SET POINT

FRR103

HEAT MODE

FRR106

System has a demand for cooling. The fan is operating at a medium speed.
CONTINUOUS

AUTO FAN

SET POINT

FAN ONLY MODE

FRR104

CONTINUOUS
SET POINT

FRR113

In the CONTINUOUS fan mode, the fan operates all the time. The system
periodically cools or heats the fan's airﬂow but the ﬂow of air does not stop.

FRR105

When in the SYSTEM COOL or HEAT or FAN ONLY mode, you
can also select FAN MODE, FAN SPEED, TIMER SCHEDULE,
and
. The SYSTEM MODE does not change.

4 Speed

FAN SPEED - The

FAN
SPEED

FAN SPEED - Cooling only units have 4 fan speeds, except models
SL28 and SL36. All Cool+Heat units only have 3 fans speeds.

button allows you to toggle between four speeds: LOW, MEDIUM, HIGH, MAX and AUTO speed operation. Press once and let go each time.

AUTO
FRR095

During the (SYSTEM mode COOL or HEAT), the fan speed automatically varies depending on the difference between the unit's set point on the control
panel and the actual room temperature. Let me explain. Say for example, you’re working in your garage and you open the big door for several minutes. The
system will sense a wide difference between the set point and the actual room temperature. When this occurs, the system fan speed increases to HIGH for
a period of time. The fan speed decreases, in step, as the temperature difference decreases. When the room temperature matches the system's set point,
fan speed returns to the lowest setting, and if the fan mode is on AUTO FAN, the fan will stop.

UP and DOWN
- arrows - Pressing either
or button changes
the system's set point (desired room temperature). These buttons are also
used for setting the Timer and other programming.

ºF - ºC Select

AUTO FAN

AUTO FAN
SET POINT

SET POINT

FRR132
FRR100

To switch from degrees Fahrenheit (F) to Celsius (C), press
buttons simultaneously for three seconds.

and

AUTO FAN

SET POINT

FRR101

One press equals 1 degree of change. Holding the button down for more
than 0.6 seconds starts the fast increment/decrement change of the set
point.

FRR133

An “F” will flash for 5 seconds and then revert to a normal display. To change
from F to C, press the
or
button within 5 seconds.

TIMER SCHEDULE BUTTON The

TIMER
SCHEDULE

button has two main uses:

1.Used to preselect a TIMER
or SCHEDULE
pre-selection instructions, please see page 17.)

function. (For

2. Used to turn on or activate the pre-selected TIMER
SCHEDULE
.

3. To turn on your pre-selction, press the SCHEDULE button once and let
go. The display at bottom right will show the TIMER icon
or
SCHEDULE icon
.
TIMER

Example:
TIMER is turned ON

FRR134

A “C” will ﬂash for 5 seconds and then revert to a normal display.

SCHEDULE is turned ON
C

AUTO FAN

TIMER (FACTORY DEFAULT) - The TIMER is the default on new
units. The TIMER function allows you to turn the unit one time ON
and one time OFF daily at the times that you select. For example, you
can command the system to turn ON at 8:15 am and to turn OFF at
1:30 pm everyday. (To set the timer, see page 18.)
SCHEDULE- The SCHEDULE
has two options with factory
pre-programmed energy management settings: temperature, system
and time settings (see addendum) (for more information, see page 17).
Schedule options are:
1. Residential Schedule - 40 hour work week

2. Commercial Schedule - 5 day business week
(These factory pre-programmed settings can only be changed by using
the WiFi FriedrichLink™ adaptor, or with an upload via the mirco USB
port, with which you can create your own custom program. See page 11.)

SET POINT

FRR135

The ºF icon goes away and the ºC icon illuminates on the normal display.

DIM Function

Wait Icon

There are three separate display brightness levels, AUTO, 20% and full
(100%). To change the DIM setting, press the Power button for three
seconds.
F

AUTO FAN

SET POINT

The wait icon
FRR192

The 1 indicates a DIM setting of Auto (factory default on new units). Use
the
or
buttons to change the setting.

FRR120

illuminates when the compressor lockout is active.

Control Panel Lock
TIMER
To lock the front panel controls, press and hold the SPEED + SCHEDULE
buttons
for 3 seconds. The lock icon
illuminates to indicate the locked status.
During lockout, none of the control panel buttons will operate.
FAN

AUTO FAN

SET POINT

FRR193

The 2 indicates a DIM setting of 20%. Press the TIMER SET button within
15 seconds to save the setting. Button inactivity for more than 15 seconds
causes the display to time out and return to the normal operating display.

To unlock, press and hold the
seconds.

FAN
SPEED

FRR116

TIMER
SCHEDULE

buttons simultaneously for 3

External Control Status

The $MART icon illuminates to indicate that the system is being controlled
remotely, such as from a smart grid from a power company (for more
information, see page 10).
SMART
F

AUTO FAN

FRR194

SET POINT

The 3 indicates a DIM setting of 100% (full brightness). Press the TIMER
SET (Refer to Figure 8) button within 15 seconds to save the setting.
Button inactivity for more than 15 seconds causes the display to time out
and return to the normal operating display.

Alerts
Check Filter
When the ﬁlter needs to be cleaned or replaced, the

$MART

FRR125

WiFi Connection
CHECK
FILTER

icon displays.

AUTO FAN

SET POINT
F

AUTO FAN

FRR126

SET POINT

The
icon illuminates to indicate that the system is receiving a Wi-Fi
connection (for more information, see page 10).

CHECK
FILTER

FRR118

The alert can be dismissed by pressing the

FAN
MODE

and

TIMER
SCHEDULE

for 3 seconds.

TIMER OR SCHEDULE OPTIONS 1 OR 2 SELECTION
The control system has one Timer and two Schedule functions:
A.

Timer (factory default) - Allows you to command the unit to turn
ON and OFF at a time you program. Setting the start, stop and day
can be found latter in this manual on page 18.

AUTO FAN

Residential Schedule - When selection #1 is selected, the unit
follows a pre-programmed set of operational parameters that
covers 5 days of the week with 4 time windows during each day.
Each time window has it's own set of 8 operating parameters.
Refer to Addendum 1.

C. Commercial Schedule - When selection #2 is selected, the unit
follows a pre-programmed set of operational parameters that
covers 7 days of the week with 2 time windows during each day.
Each time window has it's own set of 8 operating parameters.
Refer to Addendum 1.
To change the TIMER/SCHEDULE selection, press and hold the
button for 3 sec, then let go.

TIMER
SCHEDULE

SET POINT

FRR136

The display reverts to the normal display.
NOTE: The schedule options 1 and 2 have factory pre-programmed
settings which can only be changed by using the WiFi FriedrichLink™
adaptor (an accessory). With it, you can create your own custom
schedule program. See page 10 for more information.
NOTE: Once you have selected the TIMER
or SCHEDULE
we must first set the following before turning it on.
1. Set time and day
2. Set start time
3. Set stop time
See timer settings on next page.

To Turn On the Timer or Schedule Selected
The display shows the TIMER is selected. Press the
let go.

FRR139

button once and

FRR139
SCHEDULE

Press the
button and let go. The system will operate in the mode
option (1, 2 or Timer) you selected. At the above image, TIMER is selected
and turned on.
TIMER
SCHEDULE

FRR137

The display shows option 1 (Residential Schedule) is selected. Press
the
button once and let go.

SCHEDULE

FRR138

The display shows option 2 (Commercial Schedule) is selected.
To save and exit selection, press the TIMER SET button (Figure 4, Page
18).

TIMER SETTINGS
1. Set time and day

2. Set start time

3. Set stop time

Figure 4

AUTO FAN

SET POINT

FRR131

Press TIMER SET (Refer to Figure 4) button to exit and save the SET
TIME function. The TIMER SET button must be pressed within 15 second.
Button inactivity for more than 15 seconds causes the display to time out
and return to the normal operating display.

Timer Start Time
SET TIME AND DAY - To adjust the unit's time press and hold the HOUR
and the MIN buttons for three seconds (Refer to Figure 4).
F

AUTO FAN

SET POINT
AM

FRR140

FRR128

The unit's current hour displays. Use the
or
buttons to adjust the
hour. To change from AM to PM continue to increment (roll) the display.
Press TIMER SET (Refer to Figure 4) button to save the hour and display
the unit’s current minutes.

The display shows a normal system. Press and hold the HOUR button
(Figure 4) for 3 seconds. Note: The Timer start-stop times may be set even
when the system is in the Timer or Schedule mode.

AM
ON

FRR141

Use the
or
button to adjust the hour. Press the TIMER SET button
(Figure 4) to adjust the minutes.
FRR129

or
buttons to adjust the minutes. The clock is now set
Use the
for 11:25 AM. Press TIMER SET (Refer to Figure 4) button to display the
unit's day setting.

FRR142

Use the
or
button to adjust the minutes. Press the TIMER SET
button (Figure 4) within 15 seconds to exit and save the setting. The timer
is now set to start at 4:21 AM.
FRR130

Use the
or
buttons to adjust the day (1 to 7). The day setting is up
to the user. If you set the current day = 1. So if today is Tuesday, then
Day 1 = Tuesday, select 1.

The display will return to normal.

Set theTimer Stop Time

Timer ON Scenarios
Scenario 1
F

AUTO FAN

SET POINT

FRR144

The display shows a normal system. Press and hold the MIN button (Figure
4) for 3 seconds. Note the Timer start - stop times may be set even when
the system is in the Schedule mode.

The display shows a normal operating system.

FRR156

AM
OFF

FRR145

Use the
or
button to adjust the hour. Press the TIMER SET button
(Figure 4) to advance to the Minutes section.

FRR157

If the Timer function is turned ON during the Timer’s OFF time, the
illuminates. The control system immediately turns the unit OFF.

icon

Scenario 2

F
OFF

AUTO FAN

SET POINT

FRR146

Use the
or
button to adjust the minutes. Press the TIMER SET
button (Figure 4) within 15 seconds to exit and save the setting. The timer
is now set to stop at 11:55 AM. The display returns to normal.

FRR158

The display shows a normal operating system.

Turning the TIMER ON once the time and day, the start and top times
have been set:
Press the

TIMER
SCHEDULE

button once and let go.

NOTE: See the following TIMER

ON/OFF scenarios.

AUTO FAN

SET POINT

FRR159

If the Timer function is turned ON during the Timer’s ON time, the
illuminates. The control system immediately turns the unit OFF.

18
16

icon

Timer OFF Scenarios
Scenario 1

Timer - Schedule Control Block

AUTO FAN

SET POINT

SCHEDULE

FRR166

The display shows the unit in Timer mode during an in-active (OFF) period.

FRR148

If the unit is operating in the TIMER or SCHEDULE mode, and you press
TIMER
any bytton except the SCHEDULE
button, the TIMER
icon begins to
blink. All button action is blocked.

AUTO FAN

AUTO FAN
SET POINT

SET POINT

SCHEDULE

FRR167

If the Timer function is turned OFF during an in-active (OFF) period, the
Timer icon turns off. The display shows a normal system.
Scenario 2

FRR149

The TIMER
icon stops blinking after 3 seconds. You must turn the
active TIMER or SCHEDULE mode OFF before making changes. Once
TIMER
the changes are made, press the SCHEDULE
button to re-activate TIMER
or SCHEDULE mode.
If the unit is operating in the TIMER or SCHEDULE mode, and then you
TIMER
press any button except the SCHEDULE
button, the TIMER
icon begins
to blink.

AUTO FAN

SET POINT

FRR168

AUTO FAN

The display shows the unit in Timer mode during an active (ON) period.

SET POINT

All button action is blocked.

AUTO FAN

SET POINT

FRR169

If the Timer function is turned OFF during the ON time. The Timer
turns off. The control stays in the current state.
The display shows a normal system.

icon

FRR150

Remote Control Operation

FAN SPEED Button - Used to sequentially select new fan speed, plus
FA N
AUTO operation. When the SPEED
button is pressed, the fan speed icon
(triangle) changes to indicate the new speed level. Fan speed automatically
varies depending on the set temperature on the control panel and the actual
room temperature. For example if there is a big difference between your
set temperature and the actual room temperature, the system fan speed
increases to HIGH. It remains at this speed until the room temperature
matches the set temperature.

Remote Control - Refer to Figures 12 and 13 during operation description.
Getting Started - Install two (2) AAA batteries in the battery compartment
located on the back of the unit.
Operation - The remote control should be within 25 feet of the air
conditioner for operation. (Refer to Figure 11 for effectiveness). Press the
power button to turn the remote on. The remote will automatically power
off after 15 seconds if the buttons are not being pressed. The remote must
be on to control the unit.

TIMER

TIMER/SCHEDULE Button - The SCHEDULE button turns the schedule
function on and off. Press the Schedule button once to turn on the
Schedule (Residential, Commercial, or Timer) that has already been
TIMER
selected on your unit. Pressing the SCHEDULE
button a second time turns
the schedule function off.

POWER Button - Turns remote and unit on and off.
SYSTEM Button - Allows the user to sequentially select the
following: AUTO - AUTO -, COOL , HEAT , and FAN ONLY
operations. When the button is pressed, the display indicates which mode
has been selected via a display message.Note that when the heating
function is not available, the system will automatically skip the HEAT mode.

(UP) or
(DOWN)
UP and DOWN Arrows - Pressing either the
button changes the desired room temperature. The factory preset lower
and upper limits are 60°F (16°C) and 99°F (37°C). These buttons are also
used to navigate between function options when using the User Menu or
Maintenance Mode.

FAN MODE Button - Selects between automatic ( AUTO FAN ) or CONTINUOUS
operation. In the AUTO FAN mode, the fan only turns on and off when the
compressor operates or the heat function is enabled.
NOTE:

Remote Effectiveness

Hand Held Remote - Has an operating range of up to 25 ft. The infrared
remote control signal must have a clear path to transmit the command to
the air conditioning unit. The remote signal has some ability to "bounce"
off of walls and furniture similar to a television remote control. The diagram
below shows the typical operating range of the control in a standard room
with 8 ft high ceilings.

AUTO FAN is not available in the FAN ONLY Mode, the display
indicates CONTINUOUS . In the CONTINUOUS mode, fan speed is
FA N
determined by your selection on the SPEED
button.

Figure 11

TOP VIEW

25ft

7.5ft

SIDE VIEW

4ft
45°

60°

60°
6ft

30°

60°

8ft

45°

25ft
60°

30°

45°

30°

30°
16ft

8ft

25ft

FRR080

Changing Temperature from F˚ (Fahrenheit) To C˚ (Celsius) or Reverse
Be within 25' of unit with the remote control. Press the SYSTEM and FAN MODE buttons at the same time and hold for
3 seconds. The display will show the temperature in Celcius. Do the same to reverse temperature to F˚ (Fahrenheit).
(The remote control operation overrides manual settings on unit)

Remote Control Operation (Continued)
Figure 12

DISPLAY

AUTO
AUTO FAN
CONTINUOUS
AUTO

C F

SYSTEM

FAN MODE
SYSTEM

FAN MODE

POWER
TEMPERATURE
UP

TEMPERATURE
DOWN

POWER

FAN SPEED

SCHEDULE

FAN SPEED

FRR081

Figure 13

COOL
ICON

HEAT
ICON

FAN ONLY
ICON

SYSTEM
MODE

AUTO
FAN
MODE

FAN
SPEED

AUTO FAN
CONTINUOUS
AUTO

C F

°F / °C
ICONs

SCHEDULE
ICON
FRR082

UNIT OPERATION
Front Panel
System Mode Sequence (TIMER/SCHEDULE = OFF)
There are two system modes of operation. One for a cool only unit (see figure 1) and one for a heat-cool unit (see figure 2).
System parameters for each system mode are saved when exiting a system mode, and retrieved when entering a new
system mode.

Figure 1

System Mode: Cool Only Units

Timer/
Schedule

Figure 2

System Mode: Heat - Cool Units

Timer/
Schedule

ELECTRONIC CONTROL SEQUENCE OF OPERATION
Compressor and Reversing Valve Control
Active Mode

Cooling
Heat - Heat Pump
Heat - Electric
Fan Only

Compressor

On
On
Off
Off

Reversing Valve State

De-Energized
Energized

* The Reversing valve stays in the last state until a call for heat or cooling (see figure below)

Compressor Operation:

The reversing valve only changes when required
to provide cooling or heat pump. The RV valve
stays in it's last state until required to change.

Cooling Mode

Once the ambient temperature rises past the cool demand threshold (Cool Set Point + 1.5 ˚F) (see figure below), and
the compressor is not locked out, the cooling cycle begins. As shown in the figure below, the fan is started 5 seconds
prior to the compressor. Once the ambient temperature has been lowered to the cool set point (Cool Set Point minus
.25 ˚F), the cooling cycle starts to terminate by shutting off the compressor. After a 30 seconds delay, the fan is shut
off. (See figure below for graphic details)

Heating Mode Control Operation

There are two heating methods: Heat Pump and Electric Resistance Heat.
There are 3 types of units that provide heating: Heat Pump Only (Model YS10M10)
Heat Pump with Electric Heat and Cool with Electric Heat.

Heat Control Operation Heat Pump Only Unit (YS10M10 has no electric heat back-up)
Once the ambient temperature falls below the Heating Demand Threshold
(1.5 ˚F Below the Heat Set Point Temperature), the heating cycle begins. The fan is turned on 5 seconds before.
Once the ambient temperature has been raised to the Heat Satisfied Point (Set point + .25 ˚F), the compressor is
turned off. The fan is turned off 15 seconds later. The figure below illustrates the basic heat pump operation.
Satisfied Point

Heat Control (Heat Pump Only)

YS10M10 Heat Pump Defrost Cycle Operation

The defrost in this unit is an active reverse cycle. The defrost control runs in the background and determines when a
defrost cycle is required. Once initiated, the defrost cycle runs to completion.
The defrost cycle can only be initiated when the heat pump is in operation. The compressor will not be turned off to
avoid activating the compressor's time delay. The reversing valve will be switched to the cool mode position. The
indoor fan/blower will be turned off. Once the defrost cycle is finished, the system should re-enter a heating demand
cycle if required.
When the heat pump run time is 60 minutes or greater with an outdoor coil temperature of 26F degrees or lower, the
control will run an active defrost for up to 6 minutes. When the temperature at the outdoor coil reaches 54F degrees,
the heat pump heat will resume.
24

Heat Pump With Electric Heat Operation
This heating is more complex due to the possibility of two heating methods. If the ambient indoor temperature is below the heat demand threshold (1.5˚F below the heat set point temperature), and the compressor is not locked out,
turn on compressor. If the ambient indoor temperature is 0.25˚F above the heat set point turn off the compressor.

If the compressor is locked out & electric heat is available:
1. Turn on the electric heat until the compressor is not locked out.
2. After lockout, turn off the electric heat, wait 5 seconds, then turn on the compressor.

If Electric Heat is Available

After the Heat button is initially pressed, the unit will run the electric heater first until the initial set point is satisfied (Hot
Start Feature). After the initial start, the unit will switch to Heat Pump heat and decide between Heat Pump heat and
Electric heat based on the following two monitored conditions:

Condition 1

If the outdoor coil temperature sensor drops to 30 ˚F or less for 2 consecutive minutes, the unit will switch to electric heat
if available. Thereafter, the unit will switch back to Heat Pump heat if the outdoor coil temperature sensor rises to 45 ˚F or
greater.
If Electric Heat is not available (out of order) and the outdoor coil temperature sensor drops to 30 ˚F or less for 2
consecutive minutes, then the compressor and fan will turn off. Thereafter, the unit will switch back to Heat Pump heat if
the outdoor coil temperature rises to 45 ˚F or greater.

Heat Pump With Electric Heat Operation (Continued)
Condition 2

If the Δ (delta) (set point temperature minus the ambient indoor temperature) is greater than 5 ˚F, then the unit will switch
to electric heat, if available. The unit will continue to operate with electric heat until the heat demand is satisfied. Note that
the electric heat switches on after the Δ temp passes 5°F and the heat pump switches off. Also note that the electric heat
will run until the heat demand is satisfied. When another heat demand cycle is initiated, the heat pump will run unless the Δ
temp is greater than the electric heat threshold.

Automatic Emergency Heat

If the sealed system fails with a bad reversing valve or anything that causes the indoor coil to get colder than the indoor
ambient temperature:
1) If the indoor coil thermistor senses a 5 degree temperature drop as compared to the ambient temperature thermistor
and this lasts up to 5 minutes, the control board will switch the unit to electric heat and continue heating with it.
2) At this point, error code 15 is generated; heat pump failure. Indoor coil temperature lower than indoor ambient
temperature for 5 or more degrees for 5 consecutive minutes.
Note: It is Ok to continue to use the unit with the electric heater until the heat pump is repaired.

Electric Heat Operation in Cool with Electric Heat Units

When in the Heat mode, with and without Fan Mode Auto (Fan cycling):
If the indoor ambient temperature is below the Heat Demand Threshold (Heat Set Point minus 1.5 ˚F), turn on electric heat.
If Ambient is 0.3 ˚F above the Heat Set Point turn off the electric heat.

System Mode Auto

This mode provides automatic change over between cool and heat. The auto mode runs based on the room ambient
temperature vs. the Demand Thresholds. It is only available in Heat-Cool Unit.

Notes:

There is a buffer zone between the cool and heat set points where no heating or cooling is allowed to occur. It is critical
that the Cool Demand Threshold be greater than the Heat Demand Threshold by a minimum of 3° while in the Auto
System Mode. For example, if a user enters a value for the Auto Cooling Set Point that violates the minimum Δ 3° rule, the
Auto Heating Set Point will adjust accordingly.

Automatic Change Over Delay (Cool with Heat Units)

The change over delay ensures that any system heating or cooling over shoot does not trigger an opposite demand cycle.
The change over delay = 15 min. This timer blocks the opposite demand cycle from running until the timer expires. As an
example, if the last demand was a cool cycle, and another cool cycle is requested, the timer will not block the request.
However, if the last demand cycle was a cool cycle, and heat cycle is requested, the timer will block the request until the
change over delay is expired.

Compressor Lock Out Time

The lockout feature ensures that the compressor is de-energized for a period of time. The timer varies randomly
from 180 to 240 seconds
The compressor lockout is initiated every time the compressor is “off” due to:
(1) Satisfying the temperature set point
(2) Changing mode to fan only or heat
(3) Turning the unit off
(4) Control is first plugged in or power is restored after failure
(5) Line power is restored from a brown out condition

Wait ICON (Hour Glass

)

The wait icon will be turned on when the compressor is locked out and during demand for cooling or heat pump
compressor operation. The Wait ICON will be turned off when the condition clears.

Cooling Fan Delay

Fan cycle/Auto mode only
When unit cycles cooling ON – starts the fan 5 seconds EARLY. When unit cycles cooling OFF – DELAYS the fan
off for 30 seconds
Note: this fan delay is disabled during Test Mode

Heating Fan Delay

This is only for fan Mode Auto (Fan cycles with cool/heat operation) and not for continuous fan mode. When unit
cycles Heating ON – starts the fan 5 seconds EARLY. When unit cycles Heating OFF – DELAYS the fan off for 15
seconds
Note: the fan delay is disabled during Test Mode

Fan Speed Change Delay

Relay activation is delayed by a minimum number of seconds. The default for this value is 2 seconds and is used to
eliminate relay chatter.

Fan Only System Mode

The fan is turned on and runs at the specified manually set speed.
Only the Fan is turned on. Cool or Heat operation are off.
(This is different than FAN MODE CONTINUOUS where the fan is on with the cool or heat operation).

Fan Only Rules

1. If the SYSTEM FAN ONLY MODE is selected, the Auto fan mode is disabled, and the fan mode is forced to
continuous. In addition, the auto fan speed is disabled. If the user presses the fan speed key, the menu will skip over
the auto selection. The set point temperature display is off.
2. Any fan speed may be manually selected during Fan Only Mode.

Fan Operation (Front Panel Mode)
Heat – Cool – Auto – Fan Only
Models starting with SS, SM have 4 speeds. Models with SL, and all Kuhl+ have 3 speeds

"On" "
Turns
On or
Off with
heat or
cool
demand

On"
Turns
On or
Off with
heat or
cool
demand

Speed Selection
3

"On" "
Turns
On or
Off with
heat or
cool
demand

On"
Turns
On or
Off with
heat or
cool
demand

Continuous

Fan
AUTO

Mode

Fan Only

"On" "

On"

"On" "

AUTO

AUTO Operation, but never
turns Off. Uses cool set point
or heat set point vs. ambient
temperature. When there is
no demand, operate at the
lowest available speed.
AUTO operation turns On or
Off with heat or cool demand
Uses cool set point or heat
set point vs. ambient
temperature

On"

Disabled

Table

Fan ICON Detail

The system may have a 3 or 4 speed fan. The Fan Speed ICON will Display as per the table below.

Note that in the AUTO mode, the speed of the fan will be shown by illuminating the number of bars in the speed triangle.

Using the
Front Panel

Fan Relay Operation

REMOVING THE FRONT COVER

WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.

Remove the decorative front cover by using the tool
provided (see figure below).

REMOVING THE CHASSIS

WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.

Remove the decorative front cover. (See figure at
left). Remove the chassis Entrygard Retainer Wire by
removing the screw at the front right bottom corner
(See Figure below). Save this screw for reattachment
after reinstalling the chassis.

Tighten the four (4) captive screws as indicated by the
arrows in the figure above before closing the front panel
(do not over tighten). Ensure the filter is in place.
Make sure curtains do not block the side air intake
Notes on reattaching the decorative front cover:
Align the cord notch over the cord and center the fresh
air lever. Align the cover over the User Interface
(UI) to ensure it is clear around it and it does not
depress any buttons. If not installed correctly the
wrench alert symbol could flash.

Hold the cabinet stationary then use the hand grips on
both ends of the control unit support bracket to pull the
chassis out of the cabinet (see below).

Before reinserting the chassis into the sleeve ensure to
properly reinstall the chassis seal gasket.

REPLACING THE INDOOR COIL
THERMISTOR
Replace the indoor coil sensor. Ensure to properly clip
and insulate it at the same location (see figure below).

WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.

Remove the decorative front cover (see page 29).
Remove all indicated screws below (8 total, see figure
below). Remove the Discharge Sensor and the User
Interface plugs from the control board.

REPLACING THE CONTROL BOARD

WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.

Remove the screws indicated at the side and back plate
(6 total, see figure below). Partially lift the top cover and
at the same time carefully swing out from the top, the
back and side plate.
Up

Remove the decorative front cover (see page 29).
Disconnect discharge sensor plug (red)
Disconnect the User Interface plug (white)
Remove the 3 screws indicated below.
Pull control board and mount plate out and disconnect
the following connectors from it:
Power, capacitor, thermistors, fan, reversing valve
and heater.
Remove the hex screw holding the control board to
its mount plate. Pull out the control board (see figure
below).

Swing
Out

Airflow Selection and Adjustment
Air flow direction adjustment
left or right side of the discharge opening. Each of the banks of louvers
can be directed left, right, up or down in order to achieve the most optimum

move it in the direction that you would like the air to be directed. Please
louvers than the other.

Fresh air and exhaust control
Your air conditioner has the ability to bring fresh air into the room or exhaust
stale air out of the room. The control slide is found on the upper part of
the unit (See Figure).
TO BRING IN FRESH AIR – Move the lever to the Fresh Air
position
which allows outside air to enter the room. This is useful in fall and spring as
a means of bringing in fresh outside air when using FAN ONLY . It can also
be used in the summer with the compressor in the Cooling Mode if you wish.
TO EXHAUST INDOOR AIR – Move the lever to the Exhaust
position. This will allow stale air to be expelled to the outside of the dwelling.
This is especially handy in the spring or fall when indoor air tends to get
stale, or after a social gathering involving smokers, or to remove cooking
odors.
BEST PERFORMANCE – Move the lever to the Re-Circulate Position

FRR008

COMPONENTS TESTING
FAN MOTOR
A single phase permanent split capacitor motor is used to drive
the evaporator blower and condenser fan. A self-resetting
overload is located inside the motor to protect against high
temperature and high amperage conditions. (See Figure 23)

WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.

BLOWER/FAN MOTOR - TEST
1.

Determine that capacitor is serviceable.

Disconnect fan motor wires from fan speed switch or
system switch.

Apply “live” test cord probes on black wire and common
terminal of capacitor. Motor should run at high speed.

Apply “live” test cord probes on red wire and common
terminal of capacitor. Motor should run at low speed.

Apply “live” test cord probes on each of the remaining
wires from the speed switch or system switch to test
intermediate speeds. If the control is in the “MoneySaver”
mode and the thermostat calls for cooling, the fan will
start - then stop after approximately 2 minutes; then the
fan and compressor will start together approximately 2
minutes later.

Figure 23
Blower/Fan Motor

CAPACITORS

WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before servicing.
Discharge capacitor with a 20,000 Ohm 2 Watt
resistor before handling.
Failure to do so may result in personal injury,
or death.

Many motor capacitors are internally fused. Shorting the
terminals will blow the fuse, ruining the capacitor. A 20,000
ohm 2 watt resistor can be used to discharge capacitors
safely. Remove wires from capacitor and place resistor
across terminals. When checking a dual capacitor with a
capacitor analyzer or ohmmeter, both sides must be tested.

Capacitor Check with Capacitor Analyzer
The capacitor analyzer will show whether the capacitor is
“open” or “shorted.” It will tell whether the capacitor is within
its micro farads rating and it will show whether the capacitor
is operating at the proper power-factor percentage. The
instrument will automatically discharge the capacitor when
the test switch is released.

Capacitor Connections
The starting winding of a motor can be damaged by a
shorted and grounded running capacitor. This damage
usually can be avoided by proper connection of the running
capacitor terminals.
From the supply line on a typical 230 volt circuit, a 115 volt
potential exists from the “R” terminal to ground through a
possible short in the capacitor. However, from the “S” or start
terminal, a much higher potential, possibly as high as 400
volts, exists because of the counter EMF generated in the
start winding. Therefore, the possibility of capacitor failure
is much greater when the identified terminal is connected
to the “S” or start terminal. The identified terminal should
always be connected to the supply line, or “R” terminal,
never to the “S” terminal.
When connected properly, a shorted or grounded running
capacitor will result in a direct short to ground from the “R”
terminal and will blow the line fuse. The motor protector will
protect the main winding from excessive temperature.
Dual Rated Run Capacitor Hook-up

COMPONENTS TESTING (continued)
HEATING ELEMENT
All heat pumps and electric heat models are equipped
with a heating element with the exception of model
YS10M10. The other “YS” and “ES” models are
equipped with a 3.3 KW element. The “YM” and “EM”
models are equipped with a 4.0 KW element. The “YL”
and “EL” models are equipped with a 5.2 KW element.
Heating Element
Sample

The heating element contains a fuse link and a heater
limit switch. The fuse link is in series with the power
supply and will open and interrupt the power when the
temperature reaches 199°F or a short circuit occurs in
the heating element. Once the fuse link separates, a
new fuse link must be installed.
NOTE: Always replace with the exact replacement.
The heater element has a high limit control. This
control is a bimetal thermostat mounted in the top of
the heating element.
Should the fan motor fail or filter become clogged,
the high limit control will open and interrupt power to
the heater before reaching an unsafe temperature
condition.
The control is designed to open at 110°F ±6°F. Test
continuity below 110°F or when it is cooled off.
HEATING ELEMENT (Heat Pump Models)
The heating element for the “Y” model is energized
by an outdoor thermistor via the electronic control
board. The outdoor defrost thermistor is adjusted at
a predetermined temperature of approximately 30
degrees Fahrenheit and sensed for two consecutive
minutes, to stop the compressor and turn on the
heating element.

TESTING THE HEATING ELEMENT

WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.

Testing of the elements can be made with an ohmmeter
across the terminals after the connecting wires
have been removed. A cold resistance reading of
approximately 14.5 ohms for the 3.3 KW heater, 11.9
ohms for the 4.0 KW heater and 9.15 ohms for the 5.2
KW heater should be registered.
DRAIN PAN VALVE
During the cooling mode of operation, condensate
which collects in the drain pan is picked up by the condenser fan blade and sprayed onto the condenser coil.
This assists in cooling the refrigerant plus evaporating
the water.
During the heating mode of operation, it is necessary
that water be removed to prevent it from freezing during
cold outside temperatures. This could cause the condenser fan blade to freeze in the accumulated water
and prevent it from turning.
To provide a means of draining this water, a bellows
type drain valve is installed over a drain opening in the
base pan.
This valve is temperature sensitive and will open when
the outside temperature reaches 40°F. The valve will
close gradually as the temperature rises above 40°F to
fully close at 60°F.

Bellows Assembly
Drain Pan Valve

If the User Interface does not turn on:
1. Make sure the unit has the proper voltage and that it is turned on.
2. Disconnect the User Interface’s wire harness on the control board.
3. Using a voltmeter, check the top and bottom pins of the male connector (see picture below). There
should be 5VDC
4. If there is no voltage, replace the electronic control board.
6. If the connections and the wire harness are good, replace the User Interface.

User Interface

Control Board

Micro USB port for
KWIFI adaptor and
offline scheduler.
(See page #11)

User Interface
Connector

Check here for
5VDC. If no voltage,
replace board. If
there is 5VDC, check
connections and
cable. If ok, replace
User Interface.

REFRIGERATION SEQUENCE OF OPERATION
A good understanding of the basic operation of the
refrigeration system is essential for the service technician.
Without this understanding, accurate troubleshooting of
refrigeration system problems will be more difficult and time
consuming, if not (in some cases) entirely impossible. The
refrigeration system uses four basic principles (laws) in its
operation they are as follows:
1. “Heat always flows from a warmer body to a cooler body.”
2. “Heat must be added to or removed from a substance
before a change in state can occur”
3. “Flow is always from a higher pressure area to a lower
pressure area.”
4. “The temperature at which a liquid or gas changes state
is dependent upon the pressure.”
The refrigeration cycle begins at the compressor. Starting
the compressor creates a low pressure in the suction line
which draws refrigerant gas (vapor) into the compressor.
The compressor then “compresses” this refrigerant, raising
its pressure and its (heat intensity) temperature.
The refrigerant leaves the compressor through the discharge
Line as a hot High pressure gas (vapor). The refrigerant
enters the condenser coil where it gives up some of its
heat. The condenser fan moving air across the coil’s finned
surface facilitates the transfer of heat from the refrigerant to
the relatively cooler outdoor air.
When a sufficient quantity of heat has been removed from
the refrigerant gas (vapor), the refrigerant will “condense”
(i.e. change to a liquid). Once the refrigerant has been
condensed (changed) to a liquid it is cooled even further by
the air that continues to flow across the condenser coil.
The RAC design determines at exactly what point (in the
condenser) the change of state (i.e. gas to a liquid) takes
place. In all cases, however, the refrigerant must be
totally condensed (changed) to a Liquid before leaving the
condenser coil.

Suction
Line
Evaporator
Coil
Metering
Device
Refrigerant
Strainer

The refrigerant leaves the condenser Coil through the
liquid line as a warm high pressure liquid. It next will pass
through the refrigerant drier (if so equipped). It is the function
of the drier to trap any moisture present in the system,
contaminants, and large particulate matter.
The liquid refrigerant next enters the metering device. The
metering device is a capillary tube. The purpose of the
metering device is to “meter” (i.e. control or measure) the
quantity of refrigerant entering the evaporator coil.
In the case of the capillary tube this is accomplished (by
design) through size (and length) of device, and the pressure
difference present across the device.
Since the evaporator coil is under a lower pressure (due to
the suction created by the compressor) than the liquid line,
the liquid refrigerant leaves the metering device entering the
evaporator coil. As it enters the evaporator coil, the larger
area and lower pressure allows the refrigerant to expand
and lower its temperature (heat intensity). This expansion is
often referred to as “boiling”. Since the unit’s blower is moving
indoor air across the finned surface of the evaporator coil,
the expanding refrigerant absorbs some of that heat. This
results in a lowering of the indoor air temperature, hence the
“cooling” effect.
The expansion and absorbing of heat cause the liquid
refrigerant to evaporate (i.e. change to a gas). Once the
refrigerant has been evaporated (changed to a gas), it is
heated even further by the air that continues to flow across
the evaporator coil.
The particular system design determines at exactly what
point (in the evaporator) the change of state (i.e. liquid to a
gas) takes place. In all cases, however, the refrigerant must
be totally evaporated (changed) to a gas before leaving the
evaporator coil.
The low pressure (suction) created by the compressor
causes the refrigerant to leave the evaporator through the
suction line as a cool low pressure vapor. The refrigerant
then returns to the compressor, where the cycle is repeated.

Discharge
Line
Condenser
Coil
Compressor
Refrigerant Drier Liquid
Line

R-410A SEALED SYSTEM REPAIR CONSIDERATIONS

WARNING
Refrigeration system under high pressure
Do not puncture, heat, expose to flame or incinerate.
Only certified refrigeration technicians should
service this equipment.
R410A systems operate at higher pressures than
R22 equipment. Appropriate safe service and
handling practicces must be used.
Only use gauge sets designed for use with R410A.
Do not use standard R22 gauge sets.

The following is a list of important considerations when working with R-410A equipment

•

R-410A pressure is approximately 60% higher than R-22 pressure.

•

R-410A cylinders must not be allowed to exceed 125 F, they may leak or rupture.

•

R-410A must never be pressurized with a mixture of air, it may become
flammable.

•

Servicing equipment and components must be specifically designed for use with R-410A and
dedicated to prevent contamination.

•

Manifold sets must be equipped with gauges capable of reading 750 psig (high side) and 200
psig (low side), with a 500-psig low-side retard.

•

Gauge hoses must have a minimum 750-psig service pressure rating

•

Recovery cylinders must have a minimum service pressure rating of 400 psig, (DOT 4BA400
and DOT BW400 approved cylinders).

•

POE (Polyol-Ester) lubricants must be used with R-410A equipment.

•

To prevent moisture absorption and lubricant contamination, do not leave the refrigeration
system open to the atmosphere longer than 1 hour.

•

Weigh-in the refrigerant charge into the high side of the system.

•

Introduce liquid refrigerant charge into the high side of the system.

•

For low side pressure charging of R-410A, use a charging adaptor.

•

Use Friedrich approved R-410A filter dryers only.

R-410A SEALED REFRIGERATION SYSTEM REPAIRS
IMPORTANT
SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER.

EQUIPMENT REQUIRED:
1. Voltmeter

2. Ammeter

10. Low Pressure Gauge - (-30 to 200 lbs.)

3. Ohmmeter

11. Vacuum Gauge - (0 - 1000 microns)

4. E.P.A. Approved Refrigerant Recovery System
5. Vacuum Pump (capable of 200 microns or less
vacuum.)
6. Acetylene Welder
7. Electronic Halogen Leak Detector capable of
detecting HFC (Hydrofluorocarbon) refrigerants.
8. Accurate refrigerant charge measuring device such
as:
a. Balance Scales - 1/2 oz. accuracy
b. Charging Board - 1/2 oz. accuracy

WARNING
RISK OF ELECTRIC SHOCK
Unplug and/or disconnect all electrical power
to the unit before performing inspections,
maintenances or service.
Failure to do so could result in electric shock,
serious injury or death.

WARNING
HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant
and oil under high pressure.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow these procedures could
result in serious injury or death.

Refrigerant Charging
NOTE: Because the RAC system is a sealed system, service
process tubes will have to be installed. First install a line tap
and remove refrigerant from system. Make necessary sealed
system repairs and vacuum system. Crimp process tube
line and solder end shut. Do not leave a service valve in the
sealed system.

High Pressure Gauge - (0 to 750 lbs.)

12. Facilities for flowing nitrogen through refrigeration tubing
during all brazing processes.
EQUIPMENT MUST BE CAPABLE OF:
1. Recovering refrigerant to EPA required levels.
2. Evacuation from both the high side and low side of the
system simultaneously.
3. Introducing refrigerant charge into high side of the
system.
4. Accurately weighing the refrigerant charge introduced
into the system.
Proper refrigerant charge is essential to proper unit operation.
Operating a unit with an improper refrigerant charge will
result in reduced performance (capacity) and/or efficiency.
Accordingly, the use of proper charging methods during
servicing will insure that the unit is functioning as designed
and that its compressor will not be damaged.
Too much refrigerant (overcharge) in the system is just as bad
(if not worse) than not enough refrigerant (undercharge). They
both can be the source of certain compressor failures if they
remain uncorrected for any period of time. Quite often, other
problems (such as low air flow across evaporator, etc.) are
misdiagnosed as refrigerant charge problems. The refrigerant
circuit diagnosis chart will assist you in properly diagnosing
these systems.
An overcharged unit will at times return liquid refrigerant
(slugging) back to the suction side of the compressor eventually
causing a mechanical failure within the compressor. This
mechanical failure can manifest itself as valve failure, bearing
failure, and/or other mechanical failure. The specific type of
failure will be influenced by the amount of liquid being returned,
and the length of time the slugging continues.
Not enough refrigerant (undercharge) on the other hand,
will cause the temperature of the suction gas to increase to
the point where it does not provide sufficient cooling for the
compressor motor. When this occurs, the motor winding
temperature will increase causing the motor to overheat
and possibly cycle open the compressor overload protector.
Continued overheating of the motor windings and/or cycling
of the overload will eventually lead to compressor motor or
overload failure.

Method Of Charging / Repairs
The acceptable method for charging the sealed system is the
Weighed in Charge Method. The weighed in charge method is
applicable to all units. It is the preferred method to use, as it is
the most accurate.
The weighed in method should always be used whenever
a charge is removed from a unit such as for a leak repair,
compressor replacement, or when there is no refrigerant
charge left in the unit. To charge by this method, requires the
following steps:
1. Install a piercing valve to remove refrigerant from the
sealedsystem. (Piercing valve must be removed from the
system before recharging.)
2. Recover Refrigerant in accordance with EPA regulations.

WARNING
BURN HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with a torch.
Failure to follow these procedures could
result in moderate or serious injury.
3. Install a process tube to sealed system.

CAUTION
FREEZE HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with liquid refrigerant.
Failure to follow these procedures could
result in minor to moderate injury.

4. Make necessary repairs to system.
5. Evacuate system to 200 microns or less.
6. Weigh in refrigerant with the property quantity of R-410A
refrigerant.
7. Start unit, and verify performance.

WARNING

ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.

HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant
and oil under high pressure.

Extreme care must be used, if it becomes
necessary to work on equipment with power
applied.

Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.

Failure to do so could result in serious injury or
death.

Failure to follow these procedures could
result in serious injury or death.

Undercharged Refrigerant Systems
An undercharged system will result in poor performance
(low pressures, etc.) in both the heating and cooling cycle.
Whenever you service a unit with an undercharge of
refrigerant, always suspect a leak. The leak must be
repaired before charging the unit.

A check of the amperage drawn by the compressor
motor should show a lower reading. (Check the Unit
Specification.) After the unit has run 10 to 15 minutes,
check the gauge pressures. Gauges connected to system
with an undercharge will have low head pressures and
substantially low suction pressures.

To check for an undercharged system, turn the unit on,
allow the compressor to run long enough to establish
working pressures in the system (15 to 20 minutes).
During the cooling cycle you can listen carefully at the exit
of the metering device into the evaporator; an intermittent
hissing and gurgling sound indicates a low refrigerant
charge. Intermittent frosting and thawing of the evaporator
is another indication of a low charge, however, frosting
and thawing can also be caused by insufficient air over
the evaporator.
Checks for an undercharged system can be made at
the compressor. If the compressor seems quieter than
normal, it is an indication of a low refrigerant charge.

Overcharged Refrigerant Systems
Compressor amps will be near normal or higher.
Noncondensables can also cause these symptoms.
To confirm, remove some of the charge, if conditions
improve, system may be overcharged. If conditions don’t
improve, Noncondensables are indicated.
Whenever an overcharged system is indicated, always
make sure that the problem is not caused by air flow
problems. Improper air flow over the evaporator coil may
indicate some of the same symptoms as an over charged
system.
An overcharge can cause the compressor to fail, since it
would be “slugged” with liquid refrigerant.
The charge for any system is critical. When the compressor
is noisy, suspect an overcharge, when you are sure that
the air quantity over the evaporator coil is correct. Icing

of the evaporator will not be encountered because the
refrigerant will boil later if at all. Gauges connected to
system will usually have higher head pressure (depending
upon amount of over charge). Suction pressure should be
slightly higher.

Restricted Refrigerant System
Troubleshooting a restricted refrigerant system can be
difficult. The following procedures are the more common
problems and solutions to these problems. There are two
types of refrigerant restrictions: Partial restrictions and
complete restrictions.
A partial restriction allows some of the refrigerant to
circulate through the system.
With a complete restriction there is no circulation of
refrigerant in the system.
Restricted refrigerant systems display the same symptoms
as a “low-charge condition.”
When the unit is shut off, the gauges may equalize very
slowly.
Gauges connected to a completely restricted system
will run in a deep vacuum. When the unit is shut off, the
gauges will not equalize at all.
A quick check for either condition begins at the evaporator.
With a partial restriction, there may be gurgling sounds

at the metering device entrance to the evaporator. The
evaporator in a partial restriction could be partially frosted
or have an ice ball close to the entrance of the metering
device. Frost may continue on the suction line back to the
compressor.
Often a partial restriction of any type can be found by feel,
as there is a temperature difference from one side of the
restriction to the other.
With a complete restriction, there will be no sound at the
metering device entrance. An amperage check of the
compressor with a partial restriction may show normal
current when compared to the unit specifi cation. With a
complete restriction the current drawn may be considerably
less than normal, as the compressor is running in a deep
vacuum (no load.) Much of the area of the condenser will
be relatively cool since most or all of the liquid refrigerant
will be stored there.
The following conditions are based primarily on a system
in the cooling mode.

HERMETIC COMPONENTS CHECK

WARNING

BURN HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with a torch.

CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.

Failure to follow these procedures could
result in moderate or serious injury.

Failure to do so could result in serious injury.

METERING DEVICE
Capillary Tube Systems
All units are equipped with capillary tube metering devices.

Switch the unit to the heating mode and observe the
gauge readings after a few minutes running time. If
the system pressure is lower than normal, the heating
capillary is restricted.

If the operating pressures are lower than normal in both
the heating and cooling mode, the cooling capillary is
restricted.

Checking for restricted capillary tubes.
1. Connect pressure gauges to unit.
2. Start the unit in the cooling mode. If after a few minutes
of operation the pressures are normal, the check valve
and the cooling capillary are not restricted.

CHECK VALVE

A unique two-way check valve is used on the reverse cycle
heat pumps. It is pressure operated and used to direct the
flow of refrigerant through a single filter drier and to the
proper capillary tube during either the heating or cooling
cycle.
One-way Check Valve
(Heat Pump Models)

NOTE: The slide (check) inside the valve is made of teflon.
Should it become necessary to replace the check valve,
place a wet cloth around the valve to prevent overheating
during the brazing operation.
CHECK VALVE OPERATION
In the cooling mode of operation, high pressure liquid enters
the check valve forcing the slide to close the opposite port
(liquid line) to the indoor coil. Refer to refrigerant flow chart.
This directs the refrigerant through the filter drier and cooling
capillary tube to the indoor coil.

In the heating mode of operation, high pressure refrigerant
enters the check valve from the opposite direction, closing
the port (liquid line) to the outdoor coil. The flow path of
the refrigerant is then through the filter drier and heating
capillary to the outdoor coil.
Failure of the slide in the check valve to seat properly in
either mode of operation will cause flooding of the cooling
coil. This is due to the refrigerant bypassing the heating or
cooling capillary tube and entering the liquid line.
COOLING MODE
In the cooling mode of operation, liquid refrigerant from
condenser (liquid line) enters the cooling check valve
forcing the heating check valve shut. The liquid refrigerant
is directed into the liquid dryer after which the refrigerant
is metered through cooling capillary tubes to evaporator.
(Note: liquid refrigerant will also be directed through the
heating capillary tubes in a continuous loop during the
cooling mode).
HEATING MODE
In the heating mode of operation, liquid refrigerant from
the indoor coil enters the heating check valve forcing the
cooling check valve shut. The liquid refrigerant is directed
into the liquid dryer after which the refrigerant is metered
through the heating capillary tubes to outdoor coils. (Note:
liquid refrigerant will also be directed through the cooling
capillary tubes in a continuous loop during the heating
mode).

REVERSING VALVE DESCRIPTION/OPERATION

WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before servicing.
Failure to follow this warning could result in
serious injury or death.

The Reversing Valve controls the direction of refrigerant
flow to the indoor and outdoor coils. It consists of a
pressure-operated, main valve and a pilot valve actuated
by a solenoid plunger. The solenoid is energized during the
heating cycle only. The reversing valves used in the RAC
system is a 2-position, 4-way valve.
The single tube on one side of the main valve body is the
high-pressure inlet to the valve from the compressor. The
center tube on the opposite side is connected to the low
pressure (suction) side of the system. The other two are
connected to the indoor and outdoor coils. Small capillary
tubes connect each end of the main valve cylinder to the

“A” and “B” ports of the pilot valve. A third capillary is a common
return line from these ports to the suction tube on the main
valve body. Four-way reversing valves also have a capillary
tube from the compressor discharge tube to the pilot valve.
The piston assembly in the main valve can only be shifted
by the pressure differential between the high and low sides
of the system. The pilot section of the valve opens and
closes ports for the small capillary tubes to the main valve
to cause it to shift.
NOTE: System operating pressures must be near
normal before valve can shift.

TESTING THE REVERSING VALVE
SOLENOID COIL

WARNING
ELECTRIC SHOCK HAZARD
Unplug and/or disconnect all electrical power
to the unit before performing inspections,
maintenances or service.
Failure to do so could result in electric shock,
serious injury or death.

The solenoid coil is an electromagnetic type coil mounted
on the reversing valve and is energized during the
operation of the compressor in the heating cycle.
1. Turn off high voltage electrical power to unit.
2. Unplug line voltage lead from reversing valve coil.
3. Check for electrical continuity through the coil. If you
do not have continuity replace the coil.
4. Check from each lead of coil to the copper liquid line
as it leaves the unit or the ground lug. There should
be no continuity between either of the coil leads
and ground; if there is, coil is grounded and must be
replaced.

Should the valve fail to shift from coooling to heating,
block the air flow through the outdoor coil and allow the
discharge pressure to build in the system. Then switch
the system from heating to cooling.
If the valve is stuck in the heating position, block the air
flow through the indoor coil and allow discharge pressure
to build in the system. Then switch the system from
heating to cooling.
Should the valve fail to shift in either position after
increasing the discharge pressure, replace the valve.
Dented or damaged valve body or capillary tubes can
prevent the main slide in the valve body from shifting.
If you determing this is the problem, replace the reversing
valve.
After all of the previous inspections and checks have
been made and determined correct, then perform the
“Touch Test” on the reversing valve.

5. If coil tests okay, reconnect the electrical leads.
6. Make sure coil has been assembled correctly.
NOTE: Do not start unit with solenoid coil removed from
valve, or do not remove coil after unit is in operation. This
will cause the coil to burn out.

CHECKING THE REVERSING VALVE
NOTE: You must have normal operating pressures before
the reversing valve can shift.

WARNING

HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant
and oil under high pressure.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow these procedures could
result in serious injury or death.

Check the operation of the valve by starting the system
and switching the operation from “Cooling” to “Heating”
and then back to “Cooling”. Do not hammer on valve.
Occasionally, the reversing valve may stick in the heating
or cooling position or in the mid-position.
When sluggish or stuck in the mid-position, part of the
discharge gas from the compressor is directed back to the
suction side, resulting in excessively high suction pressure.
43

Reversing Valve in Heating Mode

Touch Test in Heating/Cooling Cycle

WARNING
BURN HAZARD
Certain unit components operate at
temperatures hot enough to cause burns.

Protect new valve body from heat while brazing with plastic
heat sink (Thermo Trap) or wrap valve body with wet rag.

Fit all lines into new valve and braze lines into new
valve.

Proper safety procedures must be followed,
and proper protective clothing must be
worn.

WARNING
EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.

Failure to follow these procedures could
result in minor to moderate injury.

The only definite indications that the slide is in the midposition is if all three tubes on the suction side of the valve
are hot after a few minutes of running time.
NOTE: A condition other than those illustrated above, and
on Page 44, indicate that the reversing valve is not shifting
properly. Both tubes shown as hot or cool must be the same
corresponding temperature.

Procedure For Changing Reversing Valve

NOTICE
FIRE HAZARD
The use of a torch requires extreme care and proper
judgment. Follow all safety recommended precautions and
protect surrounding areas with fire proof materials. Have
a fire extinguisher readily available. Failure to follow this
notice could result in moderate to serious property damage.

Install Process Tubes. Recover refrigerant from sealed
system. PROPER HANDLING OF RECOVERED
REFRIGERANT ACCORDING TO EPA REGULATIONS
IS REQUIRED.

Remove solenoid coil from reversing valve. If coil is to
be reused, protect from heat while changing valve.

Unbraze all lines from reversing valve.

Clean all excess braze from all tubing so that they will
slip into fittings on new valve.

Remove solenoid coil from new valve.

Failure to follow proper safety procedures
could result in serious injury or death.
8.

Pressurize sealed system with a combination of R-410A
and nitrogen and check for leaks, using a suitable leak
detector. Recover refrigerant per EPA guidelines.

Once the sealed system is leak free, install solenoid coil
on new valve and charge the sealed system by weighing
in the proper amount and type of refrigerant as shown
on rating plate. Crimp the process tubes and solder the
ends shut. Do not leave Schrader or piercing valves in
the sealed system.

NOTE: When brazing a reversing valve into the system, it is
of extreme importance that the temperature of the valve does
not exceed 250°F at any time.
Wrap the reversing valve with a large rag saturated with
water. “Re-wet” the rag and thoroughly cool the valve after
each brazing operation of the four joints involved.
The wet rag around the reversing valve will eliminate
conduction of heat to the valve body when brazing the line
connection.

COMPRESSOR CHECKS

WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment with
power applied.
Failure to do so could result in serious injury or
death.

Locked Rotor Voltage (L.R.V.) Test

Locked rotor voltage (L.R.V.) is the actual voltage available
at the compressor under a stalled condition.

Single Phase Connections

Disconnect power from unit. Using a voltmeter, attach one
lead of the meter to the run “R” terminal on the compressor
and the other lead to the common “C” terminal of the compressor. Restore power to unit.

Determine L.R.V.
Start the compressor with the volt meter attached; then stop
the unit. Attempt to restart the compressor within a couple
of seconds and immediately read the voltage on the meter.
The compressor under these conditions will not start and will
usually kick out on overload within a few seconds since the
pressures in the system will not have had time to equalize.
Voltage should be at or above minimum voltage of 197 VAC,
as specified on the rating plate. If less than minimum, check
for cause of inadequate power supply; i.e., incorrect wire
size, loose electrical connections, etc.

Amperage (L.R.A.) Test
The running amperage of the compressor is the most
important of these readings. A running amperage higher
than that indicated in the performance data indicates that a
problem exists mechanically or electrically.

Single Phase Running and L.R.A. Test
NOTE: Consult the specification and performance section
for running amperage. The L.R.A. can also be found on the
rating plate.
Select the proper amperage scale and clamp the meter
probe around the wire to the “C” terminal of the compressor.
Turn on the unit and read the running amperage on the
meter. If the compressor does not start, the reading will
indicate the locked rotor amperage (L.R.A.).

Overloads
The compressor is equipped with either an external or
internal overload which senses both motor amperage
and winding temperature. High motor temperature or
amperage heats the overload causing it to open, breaking
the common circuit within the compressor.

Heat generated within the compressor shell, usually due
to recycling of the motor, is slow to dissipate. It may take
anywhere from a few minutes to several hours for the
overload to reset.

Checking the Overloads

WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment
with power applied.
Failure to do so could result in serious injury or
death.

WARNING
BURN HAZARD
Certain unit components operate at
temperatures hot enough to cause burns.
Proper safety procedures must be followed,
and proper protective clothing must be
worn.

Failure to follow this warning could result
in moderate to serious injury.
External Overloads
With power off, remove the leads from compressor
terminals. If the compressor is hot, allow the overload
to cool before starting check. Using an ohmmeter, test
continuity across the terminals of the external overload.
If you do not have continuity; this indicates that the
overload is open and must be replaced.
Interrnal Overloads
Some model compressors are equipped with an internal
overload. The overload is embedded in the motor
windings to sense the winding temperature and/or current
draw. The overload is connected in series with the
common motor terminal.
Should the internal temperature and/or current draw
become excessive, the contacts in the overload will
open, turning off the compressor. The overload will
automatically reset, but may require several hours before
the heat is dissipated.
Checking the Internal Overload
1. With no power to unit, remove the leads from the
compressor terminals.
2. Using an ohmmeter, test continuity between terminals
C-S and C-R. If no continuity, the compressor overload is
open and the compressor must be replaced.

Single Phase Resistance Test

WARNING

Many compressor failures are caused by the following
conditions:
1.

Improper air ﬂow over the evaporator.

Overcharged refrigerant system causing liquid to be
returned to the compressor.

Restricted refrigerant system.

Lack of lubrication.

Remove the leads from the compressor terminals and set
the ohmmeter on the lowest scale (R x 1).

Liquid refrigerant returning to compressor causing oil
to be washed out of bearings.

Touch the leads of the ohmmeter from terminals common
to start (“C” to “S”). Next, touch the leads of the ohmmeter
from terminals common to run (“C” to “R”).

Noncondensables such as air and moisture in
the system. Moisture is extremely destructive to a
refrigerant system.

Capacitor (see page 34).

ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation. Extreme care must be used, if it
becomes necessary to work on equipment
with power applied.
Failure to do so could result in serious injury or
death.

Add values “C” to “S” and “C” to “R” together and
check resistance from start to run terminals (“S” to “R”).
Resistance “S” to “R” should equal the total of “C” to “S”
and “C” to “R.”
In a single phase PSC compressor motor, the highest
value will be from the start to the run connections (“S” to
“R”). The next highest resistance is from the start to the
common connections (“S” to “C”). The lowest resistance
is from the run to common. (“C” to “R”) Before replacing a
compressor, check to be sure it is defective.
GROUND TEST
Use an ohmmeter set on its highest scale. Touch one
lead to the compressor body (clean point of contact as
a good connection is a must) and the other probe in turn
to each compressor terminal. If a reading is obtained the
compressor is grounded and must be replaced.
Check the complete electrical system to the compressor
and compressor internal electrical system, check to be
certain that compressor is not out on internal overload.
Complete evaluation of the system must be made
whenever you suspect the compressor is defective. If
the compressor has been operating for sometime, a
careful examination must be made to determine why the
compressor failed.

CHECKING COMPRESSOR EFFICIENCY
The reason for compressor inefﬁciency is normally due
to broken or damaged suction and/or discharge valves,
reducing the ability of the compressor to pump refrigerant
gas.

This condition can be checked as follows:
1. Install a piercing valve on the suction and discharge or
liquid process tube.
2. Attach gauges to the high and low sides of the system.
3. Start the system and run a “cooling or heating perfor
mance test.” If test shows:
A. Below normal high side pressure
B. Above normal low side pressure
C. Low temperature difference across coil
The compressor valves are faulty - replace the
compressor.

COMPRESSOR REPLACEMENT
Recommended procedure for compressor
replacement

WARNING

RISK OF ELECTRIC SHOCK
Unplug and/or disconnect all electrical power
to the unit before performing inspections,
maintenances or service.
Failure to do so could result in electric shock,
serious injury or death.

Be certain to perform all necessary electrical and
refrigeration tests to be sure the compressor is
actually defective before replacing.

WARNING

After all refrigerant has been recovered, disconnect
suction and discharge lines from the compressor and
remove compressor. Be certain to have both suction
and discharge process tubes open to atmosphere.

Carefully pour a small amount of oil from the suction
stub of the defective compressor into a clean container.

Using an acid test kit (one shot or conventional kit), test
the oil for acid content according to the instructions
with the kit.

If any evidence of a burnout is found, no matter how
slight, the system will need to be cleaned up following
proper procedures.

Install the replacement compressor.

WARNING

HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant
and oil under high pressure.

EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.

Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.

Failure to follow proper safety procedures
result in serious injury or death.

Failure to follow these procedures could
result in serious injury or death.

Recover all refrigerant from the system though
the process tubes. PROPER HANDLING OF
RECOVERED REFRIGERANT ACCORDING TO
EPA REGULATIONS IS REQUIRED. Do not use
gauge manifold for this purpose if there has been
a burnout. You will contaminate your manifold and
hoses. Use a Schrader valve adapter and copper
tubing for burnout failures.

8. Pressurize with a combination of R-410A and nitrogen
and leak test all connections with an electronic or
Halide leak detector. Recover refrigerant and repair
any leaks found.
Repeat Step 8 to insure no more leaks are present.
9.

WARNING
HIGH TEMPERATURES
Extreme care, proper judgment and all safety
procedures must be followed when testing,
troubleshooting, handling or working around
unit while in operation with high temperature
components. Wear protective safety aids
such as: gloves, clothing etc.

CAUTION
FREEZE HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with liquid refrigerant.

Failure to do so could result in serious burn
injury.

Failure to follow these procedures could
result in minor to moderate injury.

Evacuate the system with a good vacuum pump capable
of a final vacuum of 200 microns or less. The system
should be evacuated through both liquid line and suction
line gauge ports. While the unit is being evacuated, seal
all openings on the defective compressor. Compressor
manufacturers will void warranties on units received not
properly sealed. Do not distort the manufacturers tube
connections.

10.

Recharge the system with the correct amount of
refrigerant. The proper refrigerant charge will be
found on the unit rating plate. The use of an accurate
measuring device, such as a charging cylinder,
electronic scales or similar device is necessary.

SPECIAL PROCEDURE IN THE CASE OF MOTOR
COMPRESSOR BURNOUT

WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
Failure to do so may result in personal injury,
or death.

WARNING
EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.
Failure to follow proper safety procedures
result in serious injury or death.

1. Recover all refrigerant and oil from the system.
2. Remove compressor, capillary tube and ﬁlter drier
from the system.
3. Flush evaporator condenser and all connecting
tubing with dry nitrogen or equivalent. Use approved
ﬂushing agent to remove all contamination from
system. Inspect suction and discharge line for
carbon deposits. Remove and clean if necessary.
Ensure all acid is neutralized.
4. Reassemble the system, including new drier strainer
and capillary tube.
5. Proceed with step 8-10 on previous page.
ROTARY AND SCROLL COMPRESSOR SPECIAL
TROUBLESHOOTING AND SERVICE
Basically, troubleshooting and servicing rotary compressors is the same as on the reciprocating compressor with
only one main exception:
NEVER, under any circumstances, liquid charge a rotarycompressor through the LOW side. Doing so would cause
permanent damage to the new compressor. Use a charging
adapter.
48

ROUTINE MAINTENANCE

WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before inspections,
maintenances, or service.
Extreme care must be used, if it becomes
necessary to work on equipment with power
applied.
Failure to do so could result in serious injury
or death.

WARNING

COILS AND BASE PAN
The indoor coil (evaporator coil), the outdoor coil
(condenser coil) and base pan should be inspected
periodically (yearly or bi-yearly) and cleaned of all
debris (lint, dirt, leaves, paper, etc.). Clean the coils
and base pan with a soft brush and compressed air
or vacuum. If using a pressure washer, be careful
not to bend the aluminium fin pack. Use a sweeping
up and down motion in the direction of the vertical
aluminum fin pack when pressure cleaning coils.
Cover all electrical components to protect them from
water or spray. Allow the unit to dry thoroughly before
reinstalling it in the sleeve.
NOTE:

Do not use a caustic coil cleaning agent on coils or base pan.
Use a biodegradable cleaning agent and degreaser. The use
of harsh c leaning materials may lead to deterioration o f the

NOTE:

It is e xtremely i mportant t o insure t hat none o f the electrical
and/or electronic parts of the unit get wet. Be sure to cover all
electrical components to protect them from water or spray.

EXCESSIVE WEIGHT HAZARD
Use two people to lift or carry the unit, and wear
proper protective clothing.
Failure to do so may result in personal injury.

WARNING
CUT/SEVER HAZARD
Be careful with the sharp edges and corners.
Wear protective clothing and gloves, etc.
Failure to do so could result in serious injury.

NOTICE
Units are to be inspected and serviced by qualified service
personnel only. Use proper protection on surrounding
property. Failure to follow this notice could result in
moderate or serious property damage.

NOTICE
Do not use a caustic coil cleaning agent on coils or base
pan. Use a biodegradable cleaning agent and degreaser,
to prevent damage to the coil and/or base pan.

AIR FILTER
The air filter should be inspected weekly and cleaned
if needed by vacuuming with a dust attachment or
by cleaning in the sink using warm water and a mild
dishwashing detergent. Dry the filter thoroughly before
reinstalling. Use caution as the coil surface can be sharp.
TO REMOVE, WASH AND REPLACE FILTER
Lower front panel. Use handle on filter to flex filter
up and out of retainer. Remove filter from unit. Clean
filter monthly or more frequently if needed. Refer to
accessories section for filter options.
49

BLOWER WHEEL / HOUSING / CONDENSER FAN /
SHROUD
Inspect the indoor blower and its housing, evaporator
blade, condenser fan blade and condenser shroud
periodically (yearly or bi-yearly) and clean of all debris
(lint, dirt, mold, fungus, etc.). Clean the blower housing
area and blower wheel with an antibacterial / antifungal
cleaner. Use a biodegradable cleaning agent and
degreaser on condenser fan and condenser shroud.
Use warm or cold water when rinsing these items.
Allow all items to dry thoroughly before reinstalling
them.
ELECTRONIC / ELECTRICAL / MECHANICAL
Periodically (at least yearly or bi-yearly): inspect
all control components: electronic, electrical and
mechanical, as well as the power supply. Use proper
testing instruments (voltmeter, ohmmeter, ammeter,
wattmeter, etc.) to perform electrical tests. Use an air
conditioning or refrigeration thermometer to check
room, outdoor and coil operating temperatures.
BLOWER/FAN MOTOR
The motor is permanently lubricated.

ROUTINE MAINTENANCE (Continued)

NOTICE
Do not drill holes in the bottom of the drain pan or the
underside of the unit. Not following this notice could
result in damage to the unit or condensate water leaking
inappropriately which could cause water damage to
surrounding property.

SLEEVE / DRAIN
Inspect the sleeve and drain system periodically (at least yearly or bi-yearly) and clean of all obstructions and
debris. Clean both areas with an antibacterial and antifungal cleaner. Rinse both items thoroughly with water and
ensure that the drain outlets are operating correctly. Check the sealant around the sleeve and reseal areas as
needed.
DECORATIVE FRONT COVER
Clean the front cover when needed. Use a mild detergent. Wash and rinse with warm water. Allow it to dry
thoroughly before reinstalling it in the chassis.
The decorative front and the cabinet can be cleaned with warm water and a mild liquid detergent. Do NOT use
solvents or hydrocarbon based cleaners such as acetone, naphtha, gasoline, benzene, etc.
Use a damp (not wet) cloth when cleaning the control area to prevent water from entering the unit, and possibly
damaging the electronic control.
CLEARANCES
Inspect the surrounding area (inside and outside) to ensure that the unit’s clearances have not been compromised or
altered.

Accumulator
Compressor
Fresh Air Vent

Outdoor Grille
Discharge Air

Reversing Valve
Evaporator Coil
Condenser Coil

Electronic Control
Board

Sleeve

Control Key Pad
Support Bar
Blower Wheel
Air Intake From
Sides and Bottom
Control Key Pad
(User Interface)

Air Intake Vents
Fan Blade
Fan/Blower Motor
Base Pan
Chassis Pull
Out Handle

ROUTINE MAINTENANCE (Continued)
Standard filter cleaning, removal and installation instructions
Removing filter

Filter dissassembly and cleaning

STEP 1.

NOTE:
Figure 1

Figure 3

FILTER

FILTER
GRIP

STEP 2.
Remove the filter by grabbing it from its handle, lifting it up and swinging
it out.
Figure 2

STEP 2.

Swing the front frame open. Clean the front frame by washing

Figure 4

FILTER
GRIP

TOP TAB
FRONT
FRAME WITH
STANDARD
MESH FILTER

HANDLE

Filter assembly
STEP 1.

(

onto the filter frame.

Filter installation
Install the filter back into the unit by sliding the filter halfway up,
tilt towards the front of you, then gently slide it up fully.
Do not force the filter into the unit.

)

ROUTINE MAINTENANCE (Continued)

After Maintenance/Repair
Start-up Checklist and Notes
u Inspect and ensure that all components and accessories have been
installed properly and that they have not been damaged during the
installation progress.
u Check the condensate water drain(s) to ensure that they are adequate
for the removal of condensate water, and that they meet the approval
of the end user.
u Ensure that all installation instructions concerning clearances around
the unit have been adhered to. Check to ensure that the unit air filter,
indoor coil, and outdoor coil are free from any obstructions.
u Ensure that the circuit breaker(s) or fuse(s) and supply circuit wire
size have been sized correctly. If the unit was supplied with a power
supply cord, insure that it is stored properly.
u Ensure that the entire installation is in compliance with all applicable
national and local codes and ordinances having jurisdiction.
u Secure components and accessories, such as a decorative front
cover.
u Start the unit and check for proper operation of all components in
each mode of operation.
u Instruct the owner or operator of the units operation, and the
manufacturer's Routine Maintenance.
NOTE: A log for recording the dates of maintenance and/or service is
recommended.
u Present the owner or operator of the equipment with the name,
address and telephone number of the Authorized Friedrich Warranty
Service Company in the area for future reference if necessary.

NOTE: This is a warm weather appliance
The air conditioner is designed to cool in warm weather when the outside
temperature is above 60° F (15.6° C) and below 115° F (46.1° C), so it won't
cool a room if it is already cool outside. If you want to cool a room in the
spring or fall, select the FAN ONLY mode and set the Fresh Air/Exhaust
air control to Fresh Air. This will bring in a supply of cooler outside air.

Condensation is normal
Air conditioners actually pump the heat and humidity from your room to the
outside. Humidity becomes water, and your air conditioner will use most
of the water to keep the outside coil cool. If there is excessive humidity,
there may be excess water that will drip outside. This is normal operation.

Frosting
This usually occurs because of insufficient airflow across the coils, a dirty
filter, cool damp weather, or all of these. Set the SYSTEM mode to FAN
ONLY and the frost will disappear. Setting the thermostat a little warmer
will probably prevent the frosting from recurring.

Noises
All air conditioners make some noise. Friedrich units are designed to
operate as quietly as possible. An air conditioner mounted in a wall is
quieter than one mounted in a window. It is important to ensure that the
chassis seal gasket (Item 14) is properly installed (refer to installation
instructions).

Heat pumps operate differently
If your unit is a "Y", or heat pump model, there are some things that you
will want to be aware of. Some functions of a heat pump differ from your
unit when it is used for heating:
1. It is normal for ice to form on the outdoor coil of the heat pump.
Moisture in the outside air, passing over the coil when very cold,
will form ice.
2. If the outdoor temperature drops below 37° F (3° C), your heat
pump will automatically turn on the electric resistance heat. When
the temperature rises to 40° F (4° C), the compressor will resume
the heat pump operation. If your unit is a 115 volt model (YS10),
it is designed for use in warmer climates and does not have an
electrical heat feature, and will not provide adequate heat below
37° F (2.8° C).

Service and Assistance
Before calling for service, please check the “Troubleshooting Tips” section
on pages 40 and 41. This may help you to find the answer to your problem,
avoid unnecessary service calls, and save you the cost of a service call if
the problem is not due to the product itself. If you have checked the “Basic
Troubleshooting” section and still need help, it is available as follows:
You can find the name of your local Authorized Service Provider by visiting
our web site at www.friedrich.com.

If you require further assistance

You can call the Technical Assistance Center at 1-800-541-6645.
Before calling, please make sure that you have the complete model and
serial number, and date of purchase of your equipment available. By
providing us with this information, we will be better able to assist you.

Our specialists are able to assist you with:
u Specifications and Features of our equipment.
u Referrals to dealers, and distributors.
u Use and Care Information.
u Recommended maintenance procedures.
u Installation information.
u Referrals to Authorized Service Providers and Parts depots.

Available Accessories
DC-2 Drain Kit – Part No. 01900235
In some installations, excess condensate water caused by extremely humid
conditions, may result in an undesirable water drip such as on a patio or
over an entryway. MODEL DC-2 DRAIN KIT (Part No. 01900-235) can be
installed to drain excess condensation to an alternate location.

Carbon Filter Kits
The kits vary depending on the chassis size (small, medium, large). Each
kit contains three (3) filters.
WCFS – Carbon filter kit for small chassis models.
WCFM – Carbon filter kit for medium chassis models.
WCFL – Carbon filter kit for large chassis models.

FriedrichLink™
KWIFI - FriedrichLink™ Adaptor Accessory for wireless control and
additional programming options.

Window Installation Kits (Standard in Kühl
Models without Heat)
KWIKS – For all ES and YS models.
KWIKM – For all EM and YM models.
KWIKL – For all EL and YL models.
See www.friedrich.com for additional accessories for your unit.

How to Check the Diagnostic Codes

Erasing the Diagnostic Codes

See codes chart on next page.

AUTO FAN

SET POINT

To check the active system errors, press the

FAN
SPEED

keys for 3 sec.

An “E” will appear in the display. Use the
or
keys to scroll through
any system errors. Only active errors will be shown. The display error
mode will time out in 15 seconds with no key activity.

Press and hold the

TIMER
SCHEDULE

and

buttons simultaneously for 3 sec.

The “E” will blink for 3 seconds.

AUTO FAN

SET POINT

After the “E” blinks for 3 seconds, the display returns to normal.
Press the

key to view the next error. Press the SELECT key to exit.

AUTO FAN

SET POINT

Normal display.

ERROR
CODES
ANDAND
ALARM
STATUS
ERROR
CODES
ALARM
STATUS
Error
Code
1
2
3
4

Problem
Front Panel Button Stuck For More
Than 20 Seconds
Input Voltage Out of Specification (103
- 127 / 187 - 253)
Indoor Temperature Sensor is Open or
Shorted
Indoor Coil Temperature Sensor is
Open or Shorted

Outdoor Coil Temperature Sensor is
Open or Shorted

Outdoor Coil > (greater than) 175 F

7
8
9
10

Control Board's Action
Continue to monitor for "OPEN" (Unstuck) switch. Do not process switch
input. ENSURE FRONT COVER DOES NOT DEPRESS BUTTONS
Open all relays until voltage is back within specs. Resume operation
Set temp to 75°F in COOLING or 68°F in HEATING. Unit continues to
operate
Control Board sets temp to a default of 40°F. Override sensor. Unit
continues to operate.
Sets temp to 20°F. Override sensor. Continue operation. Use Elec Heat if
available for HEATING. If not available use HEAT PUMP if outdoor temp
allows.
Shut down for 5 min. Resume operation for 3 min. Continues to monitor. If
test fails 3 times, the unit operation is locked out. Unplug and replug to
reset.
Turn compressor off. Run High Fan speed. When coil temp reachs 45°F
resume operation after lockout time.

Indoor Coil < (less than) 30 F for 2
consecutive minutes
Unit Cycles > (grater than) 9 Times per
Continue operation. Continue to monitor. Take no action. Log Only.
hour
Unit Cycles < (less than) 3 Times per
Continue operation. Continue to monitor. Take no action. Log Only.
Hour
Only used if Electric Heat is available. Run High Speed and Electric heat
Room Freeze Protection
until room temp reaches 46°F. Display "FRZ" during operation. Logged
Only

Not Applicable

Discharge Air > (greater than) 185 F

Shutdown heat pump and electric heater. Run high fan speed until temp is
100°F. Resume operation. Third occurance in 1 hour locks unit out.

Not Applicable

Discharge Air Temperature Sensor is
Open or Shorted

15
16
17

Override Sensor. Set temp to 75°F. Continue to monitor. Set error code 14
ON.
If indoor coil temp < (Lesser than) ambient temp for 5 minutes. Unit uses
Heat Pump/Reversing Valve Error
electric heat to satisfy heating demand. Unplug and replug to reset.
Ambient temp < (less than) 0°F and ambient temp > (greater than) 130°F.
Temperature Beyond Operating Limits
Set error code 16 ON. When cleared return unit to normal.
Equipment Doesn't Meet Minimum
Must have compressor enabled and at least 2 fan speeds
Configuration

Not Applicable

Outdoor Coil Temperature < 30 F for 2 Unit will use electric heat to satisfy heating demands until temp is greater
than 45°F. Unit must be a Heat Pump with electric heat.
consecutive Minutes

Frost Protection (for Heat Pump Only
Unit- YS10M10)

Unit will run active defrost for up to 6 minutes when Heat Pump run time
is greater than 60 minutes and outdoor coil temp is 26 F or less.

Not Applicable

Key Sequence

Action

To Access Error Codes
Press the fan speed and  key for 3 seconds
Reset Error Codes & Error History Press  + timer/schedule for 3 seconds



When you have entered the Error Codes section, an “E” will appear. Use the up  and down
Only active error codes will display.

keys to scroll through error codes.

Test Mode
This function is used to test the compressor operation. By turning it on,
it allows the service technician to bypass the compressor’s 3 minute
time delay.

AUTO FAN

SET POINT

FAN
FAN
Press the MODE
, SPEED
, & SCHEDULE buttons simultaneously for 3 seconds.
This will activate the test mode.

TIMER

The ON icon will appear for 5 seconds and the display will then revert to
the normal display. The test mode will time out after 1 hour. To cancel
test mode, unplug and replug the power cord.

AUTO FAN

SET POINT

Normal display.

THERMISTORS’ RESISTANCE VALUES
(This Table Applies to All Thermistors)
TEMP

RESISTENCE (K Ohms)

F
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
31
32
33
34
35
36
37
38
39
40
45
50
55
60
65
66
67
68
69
70
71
72
73
74
75
76

MIN
210.889
178.952
151.591
128.434
108.886
92.411
78.541
66.866
57.039
48.763
41.786
35.896
34.832
33.803
32.808
31.846
30.916
30.016
29.144
28.319
27.486
26.697
23.116
20.071
17.474
15.253
13.351
13.004
12.668
12.341
12.024
11.716
11.418
11.128
10.846
10.574
10.308
10.051

CENTR
225.548
190.889
161.325
136.363
115.340
97.662
82.812
70.339
59.864
51.060
43.654
37.415
36.290
35.202
34.150
33.133
32.151
31.200
30.281
29.425
28.532
27.701
23.931
20.731
18.008
15.684
13.697
13.335
12.984
12.644
12.313
11.993
11.682
11.380
11.088
10.804
10.528
10.260

MAX
240.224
202.825
171.059
144.292
121.794
102.912
87.083
73.812
62.688
53.357
45.523
38.934
37.747
36.601
35.492
34.421
33.386
32.385
31.418
30.534
29.579
28.704
24.745
21.391
18.542
16.115
14.043
13.666
13.301
12.947
12.603
12.269
11.946
11.633
11.329
11.034
10.748
10.469

77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
105
110
115
120

9.800
9.550
9.306
9.070
8.841
8.618
8.402
8.192
7.987
7.789
7.596
7.409
7.227
7.050
6.878
6.711
6.548
6.390
6.237
6.087
5.942
5.800
5.663
5.529
4.912
4.371
3.898
3.482

10.000
9.748
9.503
9.265
9.033
8.809
8.591
8.379
8.172
7.972
7.778
7.589
7.405
7.226
7.052
6.883
6.718
6.558
6.403
6.252
6.105
5.961
5.822
5.686
5.060
4.511
4.030
3.606

10.200
9.945
9.699
9.459
9.226
9.000
8.780
8.566
8.358
8.155
7.959
7.768
7.583
7.402
7.226
7.055
6.889
6.727
6.569
6.417
6.268
6.122
5.981
5.844
5.208
4.651
4.161
3.730

RESISTANCE
TOLERANCE %
MIN
MAX
6.50
6.51
6.25
6.25
6.03
6.03
5.81
5.81
5.60
5.60
5.38
5.38
5.16
5.16
4.94
4.94
4.72
4.72
4.50
4.50
4.28
4.28
4.06
4.06
4.02
4.02
3.97
3.97
3.93
3.93
3.89
3.89
3.84
3.84
3.80
3.80
3.75
3.75
3.76
3.77
3.67
3.67
3.62
3.62
3.40
3.40
3.18
3.18
2.96
2.96
2.75
2.75
2.53
2.53
2.48
2.48
2.44
2.44
2.39
2.39
2.35
2.35
2.31
2.31
2.26
2.26
2.22
2.22
2.18
2.18
2.13
2.13
2.09
2.09
2.04
2.04
2.00
2.03
2.07
2.10
2.13
2.17
2.20
2.23
2.27
2.30
2.33
2.37
2.40
2.43
2.47
2.50
2.53
2.57
2.60
2.63
2.67
2.70
2.73
2.77
2.93
3.10
3.27
3.43

2.00
2.03
2.07
2.10
2.13
2.17
2.20
2.23
2.27
2.30
2.33
2.37
2.40
2.43
2.47
2.50
2.53
2.57
2.60
2.63
2.67
2.70
2.73
2.77
2.93
3.10
3.27
3.43

ROOM AIR CONDITIONER UNIT PERFORMANCE TEST DATA SHEET
JOB NAME________________________________ TECHS NAME____________________________________
DATE: _______________ MODEL:_______________ SERIAL:________________
HOW IS ALL OF THE INSTALLATION?
GOOD BAD
YES
NO
____
____
____
____
____

IS A C H AS S IS S E A L G AS K E T IN T A L L E D ?
IS T H E F R E S H/E XA US T A IR V E N T OP E N ?
IS A F R IE DR IC H S L E E V E INS T A L L E D?
IS A F R IE DR IC H O UT DO OR G R IL LE INS T A L L E D?
IS MA IN T E N A NC E B E IN G P E R FO R ME D?
If NO is checked use back of sheet for explanation
E L E C T R IC A L :
LINE VOLTAGE (STATIC)
START UP VOLTAGE
AMPERAGE DRAW
AMPERAGE DRAW
C O MP R E S S O R
LOCKED ROTOR AMPS
RUNNING AMPERAGE DRAW

--------------------------------

____
____
____
____
____

VOLTS
VOLTS
AMPS (COOL)
AMPS (HEAT)

--------- AMPS
--------- AMPS

IN DO O R T E MP E R AT U R E S :
INDOOR AMBIENT TEMPERATURE
RELATIVE HUMIDITY (RH) INDOOR

-------- F
-------- %

DISCHARGE AIR TEMPERATURE (INDOOR)
RETURN AIR TEMPERATURE (INDOOR)

C OO L
HE A T
---------- F --------- F
---------- F --------- F

O U T DO O R T E MP E R A T U R E :
OUTDOOR AMBIENT TEMPERATURE
RH OUTDOOR RELATIVE HUMIDITY
CONDENSER

--------- F
--------- %

DISCHARGE AIR TEMPERATURE (OUTDOOR)
INTAKE AIR TEMPERATURE (OUTDOOR)

--------- F ---------- F
--------- F ---------- F

APPLICATION USE ------------------------- ROOM (RESIDENTIAL OR COMMERCIAL)
COOLING OR HEATING

AREA W ---------- X L ----------- X H ----------- = SQ/CU/FT ------------

T his is a genera l guide. plea s e c ons ult ma nua l J or M.

This is a general guide.
Please consult manual J or M for exact load calculations.
1. If heavily shaded, reduce capacity by 10%.
2. If very sunny, add 10%.
3. Add 500 BTU/hr per person over 2 people.
4. Add 4,000 BTU/hr if area is a kitchen.

TROUBLESHOOTING TIPS
NOTE: To more accurately identify the problem, first check for current maintenance
alerts and their history.
Problem

Possible Cause
The unit is turned to the off position,

Unit does not operate.

Unit Trips Circuit Breaker or
Blows Fuses.

LCDI Power Cord Trips (Reset
Button Pops Out).

The LCDI power cord is unplugged.

The LCDI power cord has tripped
(Reset button has popped out).

Press and release RESET (listen for click;
Reset button latches and remains in) to resume
operation.

The circuit breaker has tripped or
the supply circuit fuse has blown.

Reset the circuit breaker, or replace the fuse as
applicable. If the problem continues, contact a
licensed electrician.

There has been a local power
failure.

The unit will resume normal operation once
power has been restored.

Other appliances are being used on
the same circuit.

The unit requires a dedicated outlet circuit, not
shared with other appliances.

An extension cord is being used.

Do NOT use an extension cord with this or any
other air conditioner.

The circuit breaker or time-delay
fuse is not of the proper rating.

Replace with a circuit breaker or time-delay
fuse of the proper rating. See “Electrical
Rating Tables” on pg. 6 for the proper circuit
breaker/fuse rating for your unit. If the problem
continues, contact a licensed electrician.

The LCDI power cord can trip
(Reset button pops out) due to
disturbances on your power supply
line.

Press and release RESET (listen for click;
Reset button latches and remains in) to resume
normal operation.

Electrical overload, overheating, or
cord pinching can trip (Reset button
pops out) the LCDI power cord.

Once the problem has been determined and
corrected, press and release RESET (listen for
click; Reset button latches and remains in) to
resume normal operation.

A damaged power supply cord must be replaced with a new power supply cord
obtained from the product manufacturer and must not be repaired.

The return/discharge air grille is
blocked.

Ensure that the return and/or discharge air
paths are not blocked by curtains, blinds,
furniture, etc.

Windows or doors to the outside are
open.

Ensure that all windows and doors are closed.

The temperature is not set at a cool
enough/warm enough setting.

Adjust the Temperature control to a cooler or
warmer setting as necessary.

Unit Does Not Cool/Heat

Turn the unit to the on position and raise or
lower temperature setting (as appropriate) to
call for operation.
Plug into a properly grounded 3 prong
receptacle. See “Electrical Rating Tables” on
pg. 6 for the proper receptacle type for your
unit.

NOTE:

On And Off Too Frequently.

Possible Solution

remove obstruction.
The indoor coil or outdoor coil is
dirty or obstructed.

Clean the coils, (See Routine Maintenance), or
remove obstruction.

There is excessive heat or moisture
(cooking, showers, etc.) in the room.

Be sure to use exhaust vent fans while cooking
or bathing and, if possible, try not to use heat
producing appliances during the hottest part of
the day.

The temperature of the room you
are trying to cool is extremely hot.

Allow additional time for the air conditioner to
cool off a very hot room.

TROUBLESHOOTING TIPS (Continued)
Problem

Possible Cause
The outside temperature is below
60° F (16° C).

Do not try to operate your air conditioner in the
cooling mode when the outside temperature
is below 60° F (16° C). The unit will not cool
properly, and the unit may be damaged.

The digital control is set to fan
cycling mode.

Since the fan does not circulate the room
air continuously at this setting, the room air
does not mix as well and hot (or cold) spots
may result. Using the continuous fan setting
is recommended to obtain optimum comfort
levels.

Unit Does Not Cool/Heat
On And Off Too Frequently
(continued).

cooling capacity to match the heat
gain of the room.

heating capacity to match the heat
loss of the room.

Unit Runs Too Much.

Possible Solution

Check the cooling capacity of your unit to
ensure it is properly sized for the room in which
it is installed. Room air conditioners are not
designed to cool multiple rooms.
Check the heating capacity of your unit. Air
conditioners are sized to meet the cooling load,
and heater size is then selected to meet the
heating load. In extreme northern climates,
room air conditioners may not be able to be
used as a primary source of heat.

This may be due to an excessive
heat load in the room.

If there are heat producing appliances in use
in the room, or if the room is heavily occupied,
the unit will need to run longer to remove the
additional heat.

It may also be due to an improperly
sized unit.

Be sure to use exhaust vent fans while cooking
or bathing and, if possible, try not to use heat
producing appliances during the hottest part of
the day.

This may be normal for higher

your new air conditioner may result in the
unit running longer than you feel it should.
This may be more apparent, if it replaced an
compared to older models.

You may notice that the discharge
air temperature of your new air
conditioner may not seem as cold
as you may be accustomed to from
older units. This does not, however,
indicate a reduction in the cooling
capacity of the unit.

capacity rating (Btu/h) listed on the unit’s rating

COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS
Problem

Possible Cause
Low voltage

Possible Solution
Check voltage at compressor. 115V & 230V
units will operate at 10% voltage variance

Temperature not set cold enough or Set temperature to lower than ambient position.
room air thermistor inoperative
Test thermistor and replace if inoperative.
Compressor
does not run

Compressor hums but cuts off on
overload

Hard start compressor. Direct test compressor.
If compressor starts, add starting components

Open or shorted compressor
windings

Check for continuity & resistance

Open overload

Test overload protector & replace if inoperative

Open capacitor

Test capacitor & replace if inoperative

Inoperative system button

Test for continuity in all positions. Replace if
inoperative switch or electronic board.

Broken, loose or incorrect wiring

Refer to appropriate wiring diagrams to check
wiring. Correct as needed.

Problem

Fan motor
does not run

Possible Cause
Inoperative system button

Test button & replace user interface if inoperative

Broken, loose or incorrect wiring

Refer to applicable wiring diagram

Open capacitor

Test capacitor & replace if inoperative

Fan speed button defective

Replace user interface if inoperative

Inoperative fan motor

Test fan motor & replace if inoperative (be sure
internal overload has had time to reset)

Problem

Does not cool or
only cools slightly

Possible Solution

Possible Cause

Possible Solution

Undersized unit

Refer to industry standard sizing chart

Indoor ambient thermistor open
or shorted

See alarms and replace thermistor if needed.

Dirty ﬁlter

Clean as recommended in Owner ’s Manual

Dirty or restricted condenser or
evaporator coil

Use pressure wash or biodegradable cleaning
agent to clean

Poor air circulation

Adjust discharge louvers. Use high fan speed

Fresh air or exhaust air door open

Close doors. Instruct customer on use of this
feature

Low capacity - undercharge

Check for leak & make repair

Compressor not pumping properly

Check amperage draw against nameplate. If
not conclusive, make pressure test

COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS
Problem

Possible Cause
Fuse blown or circuit tripped

Replace fuse, reset breaker. If repeats, check
fuse or breaker size. Check for shorts in unit
wiring & components

Power cord not plugged in

Plug it in

Unit does not run System button in “OFF” position
Inoperative system button or open
electronic control board
Loose or disconnected wiring
control board or other components
Problem

Evaporator coil
freezes up

Problem

Possible Cause

Test for continuity. Check alarms. Correct
as needed.
Check wiring & connections. Reconnect per
wiring diagram
Possible Solution
Clean as recommended in Owner ’s Manual

Restricted airﬂow

Check for dirty or obstructed coil. Use
pressure wash or biodegradable cleaning
agent to clean

Inoperative thermistor

Check alarms. Replace as necessary.

Short of refrigerant

De-ice coil & check for leak

Inoperative fan motor

Test fan motor & replace if inoperative

Partially restricted capillary tube

De-ice coil. Replace capillary tube.

Possible Cause

Possible Solution

Excessive heat load

Unit undersized. Test cooling performance &
replace with larger unit if needed. See sizing chart.

Restriction in line

Check for partially iced coil & check
temperature split across coil
Find leak and repair.
Check operation of t-stat. Replace if contacts
remain closed.

Remote wall T-stat incorrectly wired

Refer to appropriate wiring diagram

Thermistor shorted

Replace thermistor or electronic control board

Possible Cause
Compressor relay contacts stuck

Electronic control Temperature set at coldest point
board does not
turn unit off
Incorrect wiring

Set correctly

Dirty ﬁlter

Compressor runs
continually & does Refrigerant leak
not cycle off
Compressor relay contacts stuck

Problem

Possible Solution

Possible Solution
Replace electronic control board
Turn to higher temp. setting to see if unit
cycles off. If not, replace control board.
Refer to appropriate wiring diagrams

Unit undersized for area to be
cooled

Refer to industry standard sizing chart

Defective thermistor

Replace thermistor or electronic control board

COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS
Problem

Possible Cause
Overload inoperative. Opens too
soon

Check operation of unit. Replace overload if
system operation is satisfactory

Compressor restarted before
system pressures equalized

Control’s default of 3 minutes wait delay timer
inoperative. Replace board.

Compressor runs
Low or ﬂuctuating voltage
for short periods
only. Cycles on
overload
Incorrect wiring

Problem

Water leaks into
the room

Refer to appropriate wiring diagram
Test capacitor and replace if needed.

Restricted or low air flow through
condenser coil or evaporator coil

Check for proper fan speed or blocked
coils. Correct as needed.

Compressor running abnormally
hot

Check for kinked discharge line or restricted
condenser. Refrigerant overcharge. Check
amperage, connections.

Possible Cause
No power

Possible Solution
Check power supply. Check LCDI plug. Check
wire connections. Check if panel is locked.

Incorrect wiring

Refer to appropriate wiring diagram

Defective thermistor

Replace thermistor or electronic control board

Possible Cause
Poorly installed

Noisy operation

Check voltage with unit operating. Check for
other appliances on circuit. Air conditioner
should be in a dedicated circuit for proper
voltage & fused separately

Shorted or incorrect capacitor

Problem
Unit does not
turn on

Possible Solution

Possible Solution
Refer to Installation Manual for proper
installation

Fan blade striking chassis

Reposition - adjust motor mount

Compressor vibrating

Check that compressor grommets have not
deteriorated. Check that compressor mounting
parts are not missing

Improperly mounted or loose
cabinet parts refrigerant tubes

Check assembly & parts for looseness,
rubbing & rattling pipes, etc.

Possible Cause

Possible Solution

Evaporator drain pan overﬂowing

Clean obstructed drain trough

Condensation forming underneath
base pan

Evaporator drain pan broken or cracked.
Reseal or replace. No chassis gasket installed.
Install chassis gasket

Poor installation resulting in rain
entering the room

Check installation instructions. Reseal as
required

Condensation on discharge grille
louvers

Dirty evaporator coil. Use pressure wash
or biodegradable cleaning agent to clean.
Environmental phenomena: point supply
louvers upward. Put on high fan.

Chassis gasket not installed

Install gasket, per Installation manual

Downward slope of unit is too
steep inward

Refer to installation manual for proper
installation

COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS
Problem

Water “spitting”
into room

Problem
Excessive
moisture

Problem

Unit
short cycles

Problem

Prolonged off
cycles

Problem

Outside water
leaks

Possible Cause

Possible Solution

Sublimation:
When unconditioned saturated,
outside air mixes with conditioned
air, condensation forms on the
cooler surfaces

Ensure that foam gaskets are installed in
between window panes & in between the
unit & the sleeve. Also, ensure that fresh
air/exhaust vents (on applicable models) are in
the closed position & are in tact

Downward pitch of installation is
too steep towards back of unit

Follow installation instructions to ensure that
downward pitch of installed unit is no less than
1/4” & no more than 3/8”

Restricted coil or dirty ﬁlter

Clean & advise customer of periodic cleaning
& maintenance needs of entire unit

Possible Cause

Possible Solution

Insufﬁcient air circulation thru area
to be air conditioned

Adjust louvers for best possible air circulation

Oversized unit

Operate in “MoneySaver” position

Inadequate vapor barrier in building
structure, particularly ﬂoors

Advise customer

Possible Cause

Possible Solution

Defective thermistor

Replace thermistor or electronic control board

Unit oversized

See sizing chart. Correct as needed.

Chassis seal gasket not sealing or
absent causting unit to short cycle

Check gasket. Reposition or replace as
needed

Restricted coil or dirty ﬁlter

Clean & advise customer of periodic cleaning
& maintenance needs of entire unit

Possible Cause

Possible Solution

Defective indoor ambient thermistor
or electronic control board

Check alarms. Replace thermistor or electronic
control board

Defective remote wall t-stat

Replace t-stat

Possible Cause

Possible Solution

Evaporator drain pan cracked or
obstructed

Repair, clean or replace as required

Water in compressor area

Detach shroud from pan & coil. Clean &
remove old sealer. Reseal, reinstall & check

Obstructed condenser coil

Use pressure wash or biodegradable cleaning
agent to clean

Fan blade/slinger ring improperly
positioned

Adjust fan blade to 1/2” of condenser coil ﬁn
pack

HEAT / COOL ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS
Problem
Room temperature
uneven
(Heating cycle)

Possible Cause
Bad indoor ambient thermistor

Check error codes. Replace as needed.

Fan speed too low

Set at higher fan speed.

Opened door, windows, etc.

Close doors, windows, etc.

ATSF (room air sampling feature) disabled

Enable ATSF

Problem

Possible Cause
Bad outdoor coil thermistor

Unit will not defrost
(Heat pump
only models)

Possible Solution

Possible Solution
Replace thermistor.
• On heat pumps with electric heat: no action needed
• On model YS10N10: do not operate below 37°F/ 0°C

Temperature below 32°F/ 0°C

• If outdoor air temp is higher than freezing, check
reversing valve, electric coil, outdoor thermistor,
refrigerant circuits, etc.
• For proper operation: correct as needed

Problem

Does not heat
adequately

Possible Cause

Possible Solution

Exhaust or fresh air door open

Check if operating properly. Instruct customer on
proper use of control

Dirty ﬁlter

Clean as recommended in Owner's Manual

Unit undersized

Check heat rise across coil. If unit operates
efﬁciently, check if insulation can be added
to attic or walls. If insulation is adequate,
recommend additional unit or larger one

Outdoor coil thermistor or electronic control
board defective

Check alarms (error codes). Replace thermistor
or electronic control board.

Heater hi-limit control cycling on & off

Check for adequate fan air across heater. Check
for open hi-limit control.

Shorted or open supplementary heater

Do ohmmeter check.

Incorrect wiring

Check applicable wiring diagram

HEAT PUMP ROOM AIR CONDITIONERS: TROUBLE SHOOTING TIPS
Problem

Unit cools when
heat is called for

Possible Cause
Incorrect wiring

Refer to applicable wiring diagram

Defective solenoid coil

Check for continuity of coil

Reversing valve fails to shift

Block condenser coil & switch unit to cooling.
Allow pressure to build up in system, then
switch to heating. If valve fails to shift, replace
valve.

Inoperative system switch

Check for continuity of system switch

Problem

Cooling adequate,
but heating
insufﬁcient

Action

Possible Cause

Action

Heating capillary tube partially
restricted

Check for partially starved outer coil. Replace
heating capillary tube

Check valve leaking internally

Switch unit several times from heating to
cooling. Check temperature rise across
coil. Refer to speciﬁcation sheet for correct
temperature rise

Reversing valve failing to shift
completely; bypassing hot gas

Denergize solenoid coil, raise head pressure,
energize solenoid to break loose. If valve fails
to make complete shift, replace valve.

TROUBLESHOOTING CHART - HEAT PUMP

REFRIGERANT SYSTEM DIAGNOSIS - COOLING CYCLE

LOW SUCTION PRESSURE

HIGH SUCTION PRESSURE

LOW HEAD PRESSURE

HIGH HEAD PRESSURE

Low Load Conditions

High Load Conditions

Low Load Conditions

High Load Conditions

Low Air Flow Across
Indoor Coil

High Air Flow Across
Indoor Coil

Refrigerant System
Restriction

Low Air Flow Across
Outdoor Coil

Refrigerant System
Restriction

Reversing Valve not
Fully Seated

Overcharged

Undercharged

Overcharged

Undercharged
in System

Noncondensables (air)

Moisture in System

Defective Compressor

HEAT PUMP ROOM AIR CONDITIONERS: TROUBLE SHOOTING TIPS

REFRIGERANT SYSTEM DIAGNOSIS - HEATING CYCLE
LOW SUCTION PRESSURE

HIGH SUCTION PRESSURE

LOW HEAD PRESSURE

HIGH HEAD PRESSURE

Low Airﬂow
Across Outdoor Coil

Outdoor Ambient Too High
for Operation in Heating

Refrigerant System
Restriction

Outdoor Ambient Too High
For Operation In Heating

Refrigerant System
Restriction

Reversing Valve not
Fully Seated

Low Airﬂow Across
Indoor Coil

Undercharged

Overcharged

Undercharged

Overcharged

Moisture in System

Defective Compressor

Noncondensables (air)
in System

ELECTRICAL TROUBLESHOOTING CHART - HEAT PUMP
HEAT PUMP
SYSTEM COOLS WHEN
HEATING IS DESIRED.

Is Line Voltage
Present at the Solenoid
YES
Is the Solenoid Coil Good?
YES
Reversing Valve Stuck

Replace the Reversing Valve

Is the Selector Switch
Set for Heat?

Replace the Solenoid Coil

TROUBLESHOOTING TOUCH TEST CHART: TO SERVICE REVERSING VALVES

NOTES:

RIGHT Pilot

RIGHT
PilotTube
Capillary
Capillary Tube

LEFT Pilot

Tube to OUTSIDE

LEFTCapillary
Pilot Tube
Capillary Tube

COIL
Tube to OUTSIDE
COIL

SUCTION TUBE

to INSIDE
Tube toTube
INSIDE
COILCOIL

SUCTION
TUBE to
to Compressor
Compressor

DISCHARGE
TUBE
from Compressor
from Compressor

VALVE
OPERATING
CONDITION

DISCHARGE TUBE

NORMAL FUNCTION OF VALVE

Normal Cooling

Hot

Cool

Cool
as (2)

Hot
as (1)

*TVB

TVB

Normal Heating

Hot

Cool

Hot
as (1)

Cool
as (2)

*TVB

TVB

* TEMPERATURE OF VALVE BODY
** WARMER THAN VALVE BODY

POSSIBLE CAUSES

CORRECTIONS

MALFUNCTION OF VALVE
No voltage to coil.

Check Electrical circuit and coil
Check refrigeration charge

Valve will not
shift from cool
to heat.

Hot

Starts to shift
but does not
complete
reversal.

Apparent
leap in heating.

Hot,
as (1)

*TVB

Hot

Cool,
as (2)

Hot,
as (1)

Hot

Cool

Cool,
as (2)

Hot,
as (1)

Hot

Warm

Cool

Cool,
as (2)

Hot,
as (1)

*TVB

Warm

Hot

Warm

Hot

*TVB

Hot

*TVB

Hot

Warm

Hot

*TVB

Hot

Repair leak, recharge system.

Pressure differential too high.

Recheck system.

Deenergize solenoid, raise head pressure,
reenergize solenoid to break dirt loose.
If unsuccessful, remove valve, wash
Pilot valve okay. Dirt in one bleeder hole.
out. Check on air before installing. If no
movement, replace valve, add strainer to
discharge tube, mount valve horizontally.
Piston cup leak

Stop unit. After pressures equalize, restart
with solenoid energized. If valve shifts,
reattempt with compressor running. If still
no shift, replace valve.

Clogged pilot tubes.

Raise head pressure, operate solenoid to
free. If still no shift, replace valve.

Both ports of pilot open. (Back seat port
did not close).

Raise head pressure, operate solenoid
to free
partially clogged port. If still no shift,
replace
valve.

Defective Compressor.

Replace compressor

Not enough pressure differential at start
of stroke or not enough ﬂ ow to maintain
pressure differential.

Check unit for correct operating pressures
and charge. Raise head pressure. If no
shift, use valve with smaller port.

Body damage.

Replace valve

Both ports of pilot open.

Raise head pressure, operate solenoid. If
no shift, use valve with smaller ports.

Body damage.

Replace valve

Valve hung up at mid-stroke. Pumping
volume of compressor not sufﬁ cient to
maintain reversal.

Raise head pressure, operate solenoid. If
no shift, use valve with smaller ports.

Both ports of pilot open.

Raise head pressure, operate solenoid.
If no
shift, replace valve.

Hot

Cool

Hot,
as (1)

Cool,
as (2)

*TVB

Piston needle on end of slide leaking.

Operate valve several times, then recheck.
If excessive leak, replace valve.

Hot

Cool

Hot,
as (1)

Cool,
**WVB
as (2)

**WVB

Pilot needle and piston needle leaking.

Operate valve several times, then recheck.
If excessive leak, replace valve.

Hot

Cool

Hot,
as (1)

Cool,
as (2)

Pressure differential too high.

Stop unit. Will reverse during equalization
period. Recheck system

Clogged pilot tube.

Raise head pressure, operate solenoid to
free dirt. If still no shift, replace valve.

Dirt in bleeder hole.

Raise head pressure, operate solenoid.
Remove valve and wash out. Check on air
before reinstalling, if no movement, replace
valve. Add strainer to discharge tube.
Mount valve horizontally.

*TVB

Hot

Replace coil.

Low charge.

Hot

*TVB

Cool

Hot,
as (1)

Cool,
as (2)

Hot

Cool

Hot,
as (1)

Cool,
as (2)

Hot

*TVB

Piston cup leak.

Stop unit. After pressures equalize, restart
with solenoid deenergized. If valve shifts,
reattempt with compressor running. If it
still will not reverse while running, replace
the valve.

Hot

Cool

Hot,
as (1)

Cool,
as (2)

Hot

Defective pilot.

Replace valve.

Warm

Cool

Warm,
as (1)

Cool,
as (2)

Warm

*TVB

Defective compressor.

Replace compressor

Hot

Will not shift
from heat to
cool.

Cool,
as (2)

Cool

Hot

Valve will not
shift from cool
to heat.

Cool

Repair electrical circuit.

Defective coil.

Hot

*TVB

ELECTRONIC CONTROL BOARD COMPONENTS IDENTIFICATION

Outdoor Coil Thermistor
(Blue)

Indoor Coil Thermistor

Low Fan speed

(Check here for
3.3 Volts DC)

(Green)

Medium Fan speed
High Fan speed
Max Fan speed

(Heat+Cool units along with Cool models
SL28 and SL36 only have 3 fan speeds)

Indoor Ambient Air Thermistor
(Check here for 3.3 Volts DC)

Reversing Valve
Heater Relay

Transformer
User Interface Connector
Discharge Air Thermistor
(Check here for 3.3 Volts DC)

Heater Relay
115 or 230 VAC
Voltage Configuration

(See next page for details)

Compressor Relay

Fuse

(6.3 Amps/250VAC)

When checking the 3.3 Volts DC for the thermistors, if there is no voltage or wrong voltage, replace control board.
For thermistor testing, see page #57 for resistance values.

Kühl E-Control Service Kit

Configuration Instructions – Electronic Control Gen. 2
For Use with Kühl (cool only models) and Kühl + (cool and heat models) N models.
Example SS08N10-A
Notice: Please read these instructions completely before attempting configuration.
WARNING: Refer to the table below to determine the appropriate Electronic Control Kit part number by unit model
number prefix. Failure to install the correct Electronic Control Kit for the given unit model may result in failure of the
product and/or a potentially unsafe operating condition.
FRIEDRICH ELECTRONIC CONTROL KIT PART #
62601010
62601011
62601012
62601013
62601014
Contents:

•
•
•
•
•
•

FRIEDRICH MODEL PREFIX
SS, SM
SL
YS*, YM, YL (*does not include YS10, see below)
ES, EM, EL
YS10N10

Main Board
Indoor Air Sensor
Indoor Coil Sensor
Outdoor Coil Sensor
Discharge Air Sensor
Instruction Sheet
115V Configuration

230V Configuration

Procedure:
You must first confirm and set the voltage of the electronic control to match
your air conditioner.
Please perform the steps listed below before installation:
Step 1. Identify unit operating voltage from unit nameplate label.
Step 2. Set voltage selection on the electronic control by connecting the
jumper wire(s) to match the voltage listed on the unit nameplate label.
Step 3. Consult service manual for electronic control replacement
instructions and safety information.

92019856_00 (7/12)

Friedrich Air Conditioning Co.
10001 Reunion Place, Suite 500 / San Antonio, Texas 78216
(210) 546-0500 / (800) 541-6645 / www.friedrich.com

Page 1 of 1

Kϋhl Electronic Control
COOL ONLY Models
SS08N10-A, SS10N10-A, SS10N10-B, SS12N10-A, SS14N10-A, SS14N10A-A,
SM15N10-A, SS12N30-A, SS15N30-A, SM18M30-A, SM21N30-A, SM24N30-A

C
S

-F-

RED
ORANGE

ELECTRONIC CONTROL

BLUE
BLACK

Make sure you have the
correct voltage configuration
for your unit (See page 70).

BLACK

POWER SUPPLY
230/208/115VAC
BLACK
WHITE

WHITE

HE R
M

FAN

TO CAPACITOR
BRACKET

GREEN
OR YELLOW/GREEN

RED

BROWN
BLUE

FAN
MOTOR
TO CHASSIS

SCHEMATIC
NEUTRAL (115 V)


MAX
4

USER INTERFACE

L2 (230/208 V)

R
HIGH

OLP

FAN MTR

MEDIUM

LOW
1

OLP
COMPRESSOR
5

COM

CAP

L2 OR N

FAN

COMPRESSOR

COMP



HERM

COM

CAP

LEGEND
CAP
- CAPACITOR
COMPR - COMPRESSOR
- FAN MOTOR 
MTR
- OVERLOAD PROTECTOR
OLP
- USER INTERFACE
UI
TF
- THERMAL FUSE
HL

- HEATER LIMIT FUSE

- THERMISTER
- COMBINATION TERMINAL
- GROUNDED LEAD SYMBOL
- INSULATOR

HTR

- HEATER ELEMENT

PART NO.
92170019

REV.
01

Kϋhl Electronic Control
COOL ONLY Models
SL22N30-A, SL24N30-A, SL24N30-B

C
S

-F-

RED
BLUE

ELECTRONIC CONTROL

BLACK

POWER SUPPLY
230/208/115VAC
BLACK
WHITE

WHITE

HE R
M

FAN

TO CAPACITOR
BRACKET

GREEN
OR YELLOW/GREEN

RED

BROWN
BLUE

FAN
MOTOR
TO CHASSIS

SCHEMATIC
NEUTRAL (115 V)


MAX
4

USER INTERFACE

L2 (230/208 V)

R
HIGH

OLP

FAN MTR

MEDIUM

LOW
1

OLP

C
5

COM

CAP

L2 OR N

FAN

COMPRESSOR

COMP

HERM

COM

CAP



LEGEND
CAP
- CAPACITOR
COMPR - COMPRESSOR
- FAN MOTOR 
MTR
OLP
- OVERLOAD PROTECTOR
UI
- USER INTERFACE
TF
- THERMAL FUSE
HL

- HEATER LIMIT FUSE

- REVERSING VALVE
T

- THERMISTER
- COMBINATION TERMINAL
- GROUNDED LEAD SYMBOL
- INSULATOR

HTR

- HEATER ELEMENT

PART NO.
92170021

REV.
01

Kϋhl Electronic Control
COOL ONLY Models
SL28N30-A, SL28N30-B, SL28N30-C

C
S

-F-

RED
BLUE

ELECTRONIC CONTROL

BLACK





WHITE

SSR
BLACK





BLUE

POWER SUPPLY
230/208/115VAC
BLACK
WHITE

WHITE

HE R
M

FAN

TO CAPACITOR
BRACKET

GREEN
OR YELLOW/GREEN

RED

BROWN
BLUE

FAN
MOTOR
TO CHASSIS

SCHEMATIC
NEUTRAL (115 V)


USER INTERFACE

MAX
4

L2 (230/208 V)

R
HIGH

OLP

FAN MTR

MEDIUM

LOW
1

SSR

OLP

COMP

COM

CAP

L2 OR N

FAN

COMPRESSOR

HERM

COM

CAP



LEGEND
CAP
- CAPACITOR
COMPR - COMPRESSOR
- FAN MOTOR 
MTR
OLP
- OVERLOAD PROTECTOR
UI
- USER INTERFACE
- THERMAL FUSE
TF

- HEATER LIMIT FUSE

SSR

- SOLID STATE RELAY

- REVERSING VALVE
T

- THERMISTER
- COMBINATION TERMINAL
- GROUNDED LEAD SYMBOL
- INSULATOR

HTR

- HEATER ELEMENT

PART NO.
92170013

REV.
01

Kϋhl Electronic Control
COOL ONLY Models
SL36N30-A

C
S

-F-

RED
BLUE

ELECTRONIC CONTROL

BLACK

INDOOR AMBIENT THERMISTOR

DISCHARGE AIR
THERMISTOR

VOLTAGE SELECTOR JUMPER WIRE
WHITE

BLACK

SSR

BLUE

POWER SUPPLY
230/208/115VAC

L1
BLACK

HE R
M

FAN

TO CAPACITOR
BRACKET

WHITE

GREEN
OR YELLOW/GREEN

WHITE

RED

WHITE

BROWN

BLUE

FAN
MOTOR
TO CHASSIS

SCHEMATIC

NEUTRAL (115 V)

USER INTERFACE

MAX

L2 (230/208 V)

HIGH

OLP

MEDIUM

LOW

COMP

FAN

COM

CAP

L2 OR N

FAN MTR

SSR

OLP

COMPRESSOR

HERM

COM

CAP
PTCR

LEGEND
CAP
- CAPACITOR
COMPR - COMPRESSOR
- FAN MOTOR
MTR
OLP
- OVERLOAD PROTECTOR
UI
- USER INTERFACE
TF
- THERMAL FUSE
HL

- HEATER LIMIT FUSE

- REVERSING VALVE
T

- THERMISTER
- COMBINATION TERMINAL
- GROUNDED LEAD SYMBOL
- INSULATOR

HTR

- HEATER ELEMENT

PART NO.
92170018

REV.
01

Kϋhl Electronic Control
COOL with ELECTRIC HEAT Models
ES12N33-A, ES15N33-A, EM18N34-A, EM24M34-A

C
S

-F-

WIRING DIAGRAM

-F-

RED

F1
RELAY

BLUE

F2
RELAY

BLACK

ELECTRONIC CONTROL

F3
RELAY
F4
RELAY
RV
RELAY

HEATER
ORANGE

EH1
RELAY

RED

EH2
RELAY

J18

COMP
RELAY

WHITE

LINE_L5

POWER SUPPLY
230/208/115VAC

LINE_N2

LINE_L3

BLACK
WHITE
WHITE

HE R
M

FAN

TO CAPACITOR
BRACKET

GREEN
OR YELLOW/GREEN

RED

BROWN
BLUE

FAN
MOTOR
TO CHASSIS

SCHEMATIC
NEUTRAL (115 V)


USER INTERFACE

LOW
4

EH1

L2 (230/208 V)

R
MED

OLP

FAN MTR

HIGH

ELECTRIC HEAT

HTR

FAN

COM

CAP

ELECTRIC HEAT
7

EH2

L2 OR N

OLP
L1

COMPRESSOR

COMP

S


HERM

COM

CAP

LEGEND
CAP
- CAPACITOR
COMPR - COMPRESSOR
- FAN MOTOR 
MTR
OLP
- OVERLOAD PROTECTOR
- USER INTERFACE
UI
TF
- THERMAL FUSE
HL

- HEATER LIMIT FUSE

- REVERSING VALVE
T

- THERMISTER
- COMBINATION TERMINAL
- GROUNDED LEAD SYMBOL
- INSULATOR

HTR

- HEATER ELEMENT

PART NO.
92170014

REV.
01

Kϋhl Electronic Control
COOL WITH ELECTRIC HEAT Models
EL36N35-A

C
S

-F-

WIRING DIAGRAM

-F-

RED

F1
RELAY

BLUE

F2
RELAY

BLACK

ELECTRONIC CONTROL

F3
RELAY
F4
RELAY
RV
RELAY

HEATER
ORANGE

EH1
RELAY

RED

PTCR

EH2
RELAY

WHITE

BLACK

SSR

J18

COMP
RELAY

BLUE

LINE_L5

WHITE

BLACK

GREEN
OR YELLOW/GREEN

HE R
M

FAN

TO CAPACITOR
BRACKET

BLACK
WHITE

WHITE

RED

POWER SUPPLY
230/208/115VAC

LINE_N2

LINE_L3

BROWN

BLUE

FAN
MOTOR
TO CHASSIS

SCHEMATIC

NEUTRAL (115 V)

USER INTERFACE

LOW

L2 (230/208 V)

MED

OLP

HIGH

EH1

HL
ELECTRIC HEAT

S
HTR

FAN

COM

CAP

EH2

L2 OR N

FAN MTR

ELECTRIC HEAT

COMP

SSR

OLP

COMPRESSOR

HERM

COM

CAP
PTCR

LEGEND
CAP
- CAPACITOR
COMPR - COMPRESSOR
- FAN MOTOR
MTR
OLP
- OVERLOAD PROTECTOR
- USER INTERFACE
UI
TF
- THERMAL FUSE
HL

- HEATER LIMIT FUSE

- REVERSING VALVE
T

- THERMISTER
- COMBINATION TERMINAL
- GROUNDED LEAD SYMBOL
- INSULATOR

HTR

- HEATER ELEMENT

PART NO.
92170020

REV.
01

Kϋhl Electronic Control
HEAT PUMP without ELECTRIC HEAT
YS10N10-A

C
S

-F-

BLACK

BLUE

ORANGE

F1
RELAY

BLUE

F2
RELAY

BLACK

F3
RELAY

ELECTRONIC CONTROL

F4
RELAY
RV
RELAY

EH1
RELAY

EH2
RELAY

J18

BLACK

COMP
RELAY

LINE_L5

LINE_N2

POWER SUPPLY
230/208/115VAC

LINE_L3

BLACK
WHITE

WHITE

HE R
M

FAN

TO CAPACITOR
BRACKET

GREEN
OR YELLOW/GREEN

RED

BROWN
BLUE

FAN
MOTOR
TO CHASSIS

SCHEMATIC
NEUTRAL (115 V)


MAX
4

USER INTERFACE

L2 (230/208 V)

R
HIGH

OLP

FAN MTR

MEDIUM

LOW
1

REVERSE CYCLE

FAN

COM

CAP

6
HP

L2 OR N

OLP
COMPRESSOR

COMPRESSOR

COMP



HERM

COM

CAP

LEGEND
CAP
- CAPACITOR
COMPR - COMPRESSOR
- FAN MOTOR 
MTR
- OVERLOAD PROTECTOR
OLP
- USER INTERFACE
UI
TF
- THERMAL FUSE
HL

- HEATER LIMIT FUSE

- REVERSING VALVE
- THERMISTER

- COMBINATION TERMINAL
- GROUNDED LEAD SYMBOL
- INSULATOR
HTR

- HEATER ELEMENT

PART NO.
92170015

REV.
01

Kϋhl Electronic Control
HEAT PUMP models
YS12N33-A, YM18M34-A

C
S

-F-

BLACK

BLUE

ORANGE

F1
RELAY

BLUE

F2
RELAY

BLACK

F3
RELAY

ELECTRONIC CONTROL

F4
RELAY
RV
RELAY

HEATER
ORANGE

EH1
RELAY

RED

EH2
RELAY

J18

BLACK

COMP
RELAY

LINE_L5

LINE_N2

POWER SUPPLY
230/208/115VAC

LINE_L3

BLACK
WHITE

WHITE

HE R
M

FAN

TO CAPACITOR
BRACKET

GREEN
OR YELLOW/GREEN

RED

BROWN
BLUE

FAN
MOTOR
TO CHASSIS

SCHEMATIC
NEUTRAL (115 V)


USER INTERFACE

LOW
4

L2 (230/208 V)

R
MEDIUM

OLP

FAN MTR

HIGH

EH1

ELECTRIC HEAT

COM

CAP

HTR

FAN

ELECTRIC HEAT
7

EH2

L2 OR N
8

REVERSING CYCLE

COMPRESSOR

OLP

COMPRESSOR

COMP



HERM

COM

CAP

LEGEND
CAP
- CAPACITOR
COMPR - COMPRESSOR
- FAN MOTOR 
MTR
- OVERLOAD PROTECTOR
OLP
- USER INTERFACE
UI
TF
- THERMAL FUSE
HL

- HEATER LIMIT FUSE

- REVERSING VALVE
- THERMISTER

- COMBINATION TERMINAL
- GROUNDED LEAD SYMBOL
- INSULATOR
HTR

- HEATER ELEMENT

PART NO.
92170016

REV.
01

Kϋhl Electronic Control
HEAT PUMP model
YL24N35-A
C
S

-F-

BLACK

BLUE

ORANGE

F1
RELAY

BLUE

F2
RELAY

BLACK

F3
RELAY

ELECTRONIC CONTROL

F4
RELAY
RV
RELAY

HEATER
ORANGE

EH1
RELAY

RED

EH2
RELAY

BLACK





WHITE
J18

SSR

BLACK





COMP
RELAY

BLUE

LINE_L5

LINE_N2

POWER SUPPLY
230/208/115VAC

LINE_L3

BLACK
WHITE

WHITE

HE R
M

FAN

TO CAPACITOR
BRACKET

GREEN
OR YELLOW/GREEN

RED

BROWN
BLUE

FAN
MOTOR
TO CHASSIS

SCHEMATIC
NEUTRAL (115 V)


USER INTERFACE

LOW
4

EH1

L2 (230/208 V)

R
MEDIUM

OLP

FAN MTR

HIGH

ELECTRIC HEAT

COM

CAP

HTR

FAN

ELECTRIC HEAT
7

EH2

L2 OR N
8

REVERSING CYCLE

OLP

SSR

COMP

COMPRESSOR

HERM

COM

CAP



LEGEND
CAP
- CAPACITOR
COMPR - COMPRESSOR
- FAN MOTOR 
MTR
- OVERLOAD PROTECTOR
OLP
- USER INTERFACE
UI
TF
- THERMAL FUSE
HL

- HEATER LIMIT FUSE

- REVERSING VALVE
- THERMISTER

- COMBINATION TERMINAL
- GROUNDED LEAD SYMBOL
- INSULATOR
HTR

- HEATER ELEMENT

PART NO.
92170017

REV.
01

Kühl Gen2 Remote Control

Replacement Remote Control Configuration Instructions
For Use with Kühl (cool only models) and Kühl + (cool & heat models), N models only.
Contents:
• Remote Control with Holder
• (2) AAA-batteries
• Instruction Sheet

ATTENTION! – If the Remote Control Does not Control the Unit, You May
Need to Configure it. Follow the steps below to configure:

Please read instructions completely before attempting configuration of the Remote Control. Before
performing the steps below, please test the remote control with your Air Conditioning unit as it may
already configured for your unit model type.
Step 1.

Point the Remote Control at the Air Conditioning Unit and press the Remote Control
POWER key once to illuminate the Air Conditioning Unit’s display.

Step 2.

Once the display on the Air Conditioning Unit is illuminated, note the number shown in the
display. (See Figure 1)

Step 3.

With the Remote Control display illuminated, press and hold the Remote Control
SCHEDULE and the FAN SPEED Keys simultaneously for approximately 6 seconds until
the Remote Control displays current configuration number message. (See Figure 2)
If the number displayed does not match what is shown on the Remote Control display, you
will need to change the Remote Control’s setting to match that of the Air Conditioning Unit.
Air Conditioner Message
Figure 1

Remote Control Message
Figure 2

Kühl Gen2 Remote Control

Step 4.

Using the Remote Control  Increase or  Decrease Keys, match the configuration
number displayed on the Remote Control to the number shown on the Air Conditioning Unit
display (see examples below).
Air Conditioning Unit Display

Step 5.

To save setting in Remote Control, press and hold the Remote Control SCHEDULE and
FAN SPEED Key simultaneously for approximately 6 seconds until the displayed
configuration number on the Remote Control flashes.

The Remote Control is now configured to work with the air conditioner.

Remote Control Display

Kühl User Interface Service Kit

Replacement Instructions
For Use with Kühl (cool only models) and Kühl + (cool and heat models)
ATTENTION! - Please read these instructions completely before attempting replacement.

Always unplug the power supply from the power supply receptacle.
Contents:
•
•
•
•

User Interface (UI)
Ribbon Cable
2 – Mounting screws for UI
Instruction Sheet

Step 1.

Disconnect ribbon cable by pulling straight out

Step 2.

Remove 2 –mounting screws securing UI and disconnect ribbon cable

Step 3.

Remove UI and ribbon cable from handle assembly

Step 4.

Install new UI using the 2-screws, route new ribbon cable and reattach ribbon cable to UI
and Main control board

Step 5.

Verify control operation

Ribbon cable connection
Mounting screws

PARTS SECTION
Kühl & Kühl+ Standard Chassis Unit Exploded Diagram

Kühl & Kühl+ Small-Chassis 2012 Parts List
Item Part Number Part Description
1
1
1

62050304
61850343
61850345

CONDENSOR COIL
CONDENSOR COIL
CONDENSOR COIL

61850344

CONDENSOR COIL

61818520

ES12N33-A ES15N33-A SS08N10-A SS10N10-A SS12N10-A SS12N30-A SS14N10-A SS15N30-A YS10N10-A YS12N33-A
1
1

3
1

EXPANDED METAL GRILLE PAINTED SML

60169120

SCRIPT FRIEDRICH 2010 "FESTOON"

*
2

91002900
61850126

SPEEDNUT PUSH TYPE
EVAPORATOR COIL

61850129

EVAPORATOR COIL

61850128

EVAPORATOR COIL

2
2

61850127
61850131

EVAPORATOR COIL
EVAPORATOR COIL

61834800

STRAINER .312 COIL

61718107

COMPRESSOR KIT 62200118

61717176

COMPRESSOR KIT 62200501

3
3
3
3
3
*
*
*
*
*
*
*
*
*
4
5
6
6
6
6
7
7
7
7
7
7
7
*
*
8
8

61717127
61718104
61717126
61717116
61718114
3760500
3760520
3760513
3760511
3760451
3760547
3760543
3760555
3760479
25022022
62601016
62601013
62601010
62601012
62601014
61080522
61080529
61080533
61080559
61080582
61080566
61080532
61820700
61820702
61820401
25063505
25063605

COMPRESSOR KIT 62200109
COMPRESSOR KIT 62200420
COMPRESSOR KIT 62200115
COMPRESSOR KIT 62200103
COMPRESSOR KIT 62200419
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
REVERSING VALVE KIT + SOLENOID KIT
USER INTERFACE SERVICE KIT
ELECTRONIC CONTROL SERVICE KIT CL-EH 3SP GEN2
ELECTRONIC CONTROL SERVICE KIT COOL 4SP GEN2
ELECTRONIC CONTROL SERVICE KIT HP-EH 3SP GEN2
ELECTRONIC CONTROL SERVICE KIT HP 3SP GEN2
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR STRAP 2.0 DIAMETER
CAPACITOR STRAP 2.5 DIAMETER
CAPACITOR MOUNTING BRACKET
COIL SOLENOID 115VAC
COIL SOLENOID 208/230VAC

9
9
9
9
9
9
9
10
11
11
12
12
12
13
14
14
15
16

61764583
61764585
61764586
61764589
61764594
61764601
61764606
61878610
61871496
61871497
60500390
60500394
60500398
60179904
60610603
60610604
61814905
60542003

OVERLOAD
OVERLOAD
OVERLOAD
OVERLOAD
OVERLOAD
OVERLOAD
OVERLOAD
HEATER 3.3 KW @ 230V
FAN MOTOR
FAN MOTOR
SUPPLY CORD 15A 125V
SUPPLY CORD 13A 250V
SUPPLY CORD 20A 250V
CONDENSATE DRAIN VALVE
BLOWER WHEEL
BLOWER WHEEL
SCROLL SML
FAN BLADE

8517

61803601

61802500

61907312

1
1
1
1

1
1

1
1
1
1

1
1

1
1
1
1
1

1
1

1
1
1

1
1

1
1
1

1
1
1
1
1

1
1

1
1
1

1
1

1
1
1

1
1
1
1

1
1

1
1
1

1
1

1
1
1

1
1
1
1
1

SHROUD, SML
MOUNT, FAN MOTOR
INNERWALL ASY SML

1
1
1

1
1

1
1
1
1

1
1
1

1
1

1
1
1

1
1

1
1
1

61871496

FAN MOTOR

11
12

61871497
60500390

FAN MOTOR
SUPPLY CORD 15A 125V

60500394

SUPPLY CORD 13A 250V

60500398

SUPPLY CORD 20A 250V

60179904

CONDENSATE DRAIN VALVE

14
14

60610603
60610604

BLOWER WHEEL
BLOWER WHEEL

61814905

SCROLL SML

1
17
1
18
1
19
1
20
*
**

62050304
61803601
61850343
61802500
61850345
61907312
61850344
61821500
61818520
61814805
60169120

CONDENSOR
SHROUD, SMLCOIL
CONDENSOR
COIL
MOUNT, FAN MOTOR

2*
2
22

61850126
61817000
61850129
61820200

EVAPORATOR
COIL
INSUL L/S PANEL
SML
EVAPORATOR
COIL
AIRFOIL SM/MED/SH

2
23
2
24
2
25
*

26
3
27
3

61817100
91002900

61850128
61816701
61850127
61906700
61850131
61817300
61834800

61816900
61718107
61807255
61717176

1
1
1

1
1

1
1
1

CONDENSOR COIL
INNERWALL ASY SML
CONDENSOR COIL
ASSY DOOR/SLIDE S/M/L
EXPANDED METAL GRILLE PAINTED SML
CONNECTOR
FRESH2010
AIR "FESTOON"
S/M
SCRIPT
FRIEDRICH
DECK SML/MED
SPEEDNUT
PUSH TYPE

EVAPORATOR COIL
INSUL TOP COVER S/M
EVAPORATOR COIL
COVER TOP S/M
EVAPORATOR COIL
BLOWER FR
SML
STRAINER
.312
COIL

INSUL INNERWALL
SML
COMPRESSOR
KIT 62200118
PANEL CONTROL
COMPRESSOR
KITSML
62200501

1
1
1

Kühl & Kühl+ Small-Chassis 2012 Parts List

16 Part
60542003
FAN Description
BLADE
Item
Number Part

21
*

1
1

1
1
1
1
1
1
1
1
1
1
ES12N33-A
ES15N33-A
SS08N10-A
SS10N10-A
SS12N10-A
SS12N30-A
SS14N10-A
SS15N30-A
YS10N10-A
YS12N33-A
1

1
1
1

1
1
11

1
1
1
1
11

1
1
1

1
1
11

1
1
1
1
11

1
1
1

1
11

1
1
1

11
1

11
11

1
1
11

1
1
1
1
11

1
11

1
1
11

1
11

1
1
11

1
11

1
1
1

11
1

21
1

31
1

3
28
3
29
3
29
3
29
3
29
*

61717127
61802810
61718104
61803457
61717126
61803459
61717116
61803461
61718114
61803462
3760500

COMPRESSOR
KITSML
62200109
ASSY PARTITION
COMPRESSOR
KIT 62200420
BASEPAN
COMPRESSOR KIT 62200115
BASEPAN
COMPRESSOR KIT 62200103
BASEPAN
COMPRESSOR KIT 62200419
BASEPAN TUBE
CAPILLARY

1
1

30
*
*
31

61803800
3760520
3760513
62400127

DRAINPAN SML/MED
CAPILLARY
TUBE
CAPILLARY
TUBE
AIR FILTER ASSEMBLY
SML

1
11

1
1
1

*
32
*
*
*
33
*
34
*
35
*

3760511
62400134
3760451
60301802
3760547
62400124
3760543
61802600
3760555
91400402
3760479

CAPILLARY
TUBE
TOOL MANIFOLD
CAPILLARY TUBE
CLIP MANIFOLD TOOL
CAPILLARY TUBE
ASSY UI HOLDER MOUNT SML/MED
CAPILLARY TUBE
BRACE SHROUD,
CAPILLARY
TUBE S/M
COMPRESSOR
STUD
CAPILLARY
TUBE

1
1
1

1
1

1
1
1

1
1

1
11
1

1
11

1
1
12
3

3
13

2
1

3
1

2
13

3
13

5
1

2
1

13
1

1
1

6
36
6
36
6
37
6
38
7

25022022
VALVE KIT + SOLENOID KIT
61715800 REVERSING
COUNTER WEIGHT
62601016
INTERFACE
SERVICE KIT
61028900 USER
COMPRESSOR
GROMMET
62601013 ELECTRONIC CONTROL SERVICE KIT CL-EH 3SP GEN2
61028901 COMPRESSOR GROMMET
62601010 ELECTRONIC CONTROL SERVICE KIT COOL 4SP GEN2
61028903 COMPRESSOR GROMMET
62601012 ELECTRONIC CONTROL SERVICE KIT HP-EH 3SP GEN2
61937200 ELECTRONIC
PANEL L/S SML
62601014
CONTROL SERVICE KIT HP 3SP GEN2
61816800 CAPACITOR
INSUL L/S AIR DECK S/M
61080522

3
1

7
39
7
40
7
41
7
42
7
43
7
44
*

61080529
62400425
61080533
61819816
61080559
61109514
61080582
61819715
61080566
60610305
61080532
61717302
61820700

CAPACITOR
DECORATIVE FRONT SERVICE KIT SML
CAPACITOR
ANGLE WNGBRD SIDE PAINTED SML
CAPACITOR
BRKT SUPPORT ASSY PAINTED
CAPACITOR
ANGLE WINGBOARD TOP PAINTED SML/MED
CAPACITOR
WINDOW SEAL GASKET
CAPACITOR
CHASSIS GASKET
CAPACITOR
STRAPSEAL
2.0 DIAMETER

45
*

61808414
61820702
61820401
61825720
25063505
60294416

SILL PLATE PAINTED
SML/MED
CAPACITOR
STRAP 2.5
DIAMETER
CAPACITOR
MOUNTING
BRACKET
SHELL OUTER
SML REPLMT
2010
COIL
SOLENOID
WINGBOARD
SML115VAC
2010

4
35
5
36

46
8
47

8
48
9
*
9
9*

25063605
62601015
61764583
61824405
61764585
61883102
61764586

COIL SOLENOID 208/230VAC
REMOTE CONTROL SERVICE KIT
OVERLOAD
CHECK VALVE
OVERLOAD
48 PAD ISOLATION 3X6
OVERLOAD

1
3

11
1

1
12

2
1
1

2
1
2

1
1
1

11
1

11
11

1
1
11
1
11
1

11
11

11
1

1
11

1
1

HEATER MOUNT BRACKET
OVERLOAD

1
1

9*
9*
9
*
10
*
11
*
11
*
12

61764594
61812900
61764601
61812901
61764606
61821800
61878610
61715800
61871496
60846016
61871497
60846017
60500390

OVERLOAD
SHIELD BOTTOM S/M 3R
OVERLOAD
SHIELD BOTTOM S/M 4R
OVERLOAD
SHEILD HEAT SMALL
HEATER 3.3 KW @ 230V
COUNTER WEIGHT
FAN MOTOR
ASSYMOTOR
PLSTC BAG W/WIK
FAN
ASSY PLSTC
BAG
WIK
SUPPLY
CORD
15AW/O
125V

1
1
1

1
1
1
1

12
*
12
*

60500394
60073300
60500398
61819601

SUPPLY
13A 250V
GASKET CORD
URETHANE
FOAM
SUPPLY
CORDS/M/L
20A 250V
SHELL GUIDE

CONDENSATE DRAIN VALVE
CHASSIS RETAINER WIRE
BLOWER WHEEL
THERMISTOR SENSOR KIT
BLOWER WHEEL

12
1
1
1
1

1
1
1
11

1
1

11
1

1
1

61818900
61764589

60179904
61826400
60610603
62601019
60610604

13
*
14
*
14

1
3

1
1

1
1
1

1
1

1
1
1

1
1

1
1
1

1
1

1
1
1

2
1
1
1
1

12
1
1
1
1

61814905
60542003

SCROLL SML
FAN BLADE

1
1

61803601

SHROUD, SML

61802500

MOUNT, FAN MOTOR

8616

Kühl & Kühl+ Medium-Chassis 2012 Parts List
Item Part Number Part Description
1
61850227 CONDENSOR COIL
1
61850140 CONDENSOR COIL

EM18N34-A EM24N34-A SM15N10-A SM18N30-A SM21N30-A SM24N30-A YM18N34-A
1
1
1

61850244

CONDENSOR COIL

1
*

61850141
61818521

CONDENSOR COIL
EXPANDED METAL GRILLE PAINTED MED

60169120

SCRIPT FRIEDRICH 2010 "FESTOON"

*
2

91002900
61850108

SPEEDNUT PUSH TYPE
EVAPORATOR COIL

62050030

EVAPORATOR COIL

62050034

EVAPORATOR COIL

2
2

61850130
62050040

EVAPORATOR COIL
EVAPORATOR COIL

*
*

61834800
61834801

STRAINER .312 COIL
STRAINER .375 COIL

61718111

COMPRESSOR KIT 62200311

3
3
3
3
*
*
*
*
*
4
5
6
6
6
7
7
7
7
7
*
*
8
9
9
10
11
11
12
12
12
12
13
14
14
14

61717131
61717118
61717119
61718105
3760500
3760520
3760513
3760545
3760451
25022032
62601016
62601013
62601010
62601012
61080529
61080557
61080588
61080591
61080592
61820700
61820702
61820401
25063605
61764583
61764570
61878611
61871495
61871498
60500390
60500394
60500398
60500399
60179904
60610616
60610617
60610618

COMPRESSOR KIT 62200108
COMPRESSOR KIT 62200105
COMPRESSOR KIT 62200106
COMPRESSOR KIT 62200121
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
REVERSING VALVE KIT + SOLENOID KIT
USER INTERFACE SERVICE KIT
ELECTRONIC CONTROL SERVICE KIT CL-EH 3SP GEN2
ELECTRONIC CONTROL SERVICE KIT COOL 4SP GEN2
ELECTRONIC CONTROL SERVICE KIT HP-EH 3SP GEN2
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR STRAP 2.0 DIAMETER
CAPACITOR STRAP 2.5 DIAMETER
CAPACITOR MOUNTING BRACKET
COIL SOLENOID 208/230VAC
OVERLOAD
OVERLOAD
HEATER 4.0 KW @ 230V
FAN MOTOR
FAN MOTOR
SUPPLY CORD 15A 125V
SUPPLY CORD 13A 250V
SUPPLY CORD 20A 250V
SUPPLY CORD 30A 250V
CONDENSATE DRAIN VALVE
BLOWER WHEEL
BLOWER WHEEL
BLOWER WHEEL

15
16

61817505
60542004

SCROLL MED
FAN BLADE

1
1

8717

61804901

SHROUD, MED

61804100
61907212

MOUNT, FAN MOTOR

1
1

18
19

INNERWALL ASY MED

1
1

3
1

1
1
1

1
1

1
1
1
1
3

1
1

2
3

3
2

1
1

1
1
1

1
1

1
1
1

1
1

1
1
1
1

1
1
1

1
1

1
1
1
1
1
1

1
1

1
1
1

1
1

60500398

SUPPLY CORD 20A 250V

60500399

SUPPLY CORD 30A 250V

60179904

CONDENSATE DRAIN VALVE

60610616

BLOWER WHEEL

60610617

60610618

*
2
22

2
23
2
24

61818521
61814805
60169120
61817100

91002900
61817001
61850108
61820200
62050030
61816701

2
25
2
26

62050034
61906700
61850130
61817400
62050040
61816901

3
29
3
29

61718111
61803461
61717131
61803462

*
27
*
28

3
30
3
31

3
32
*
*
33
*
34
*
35

*
35
4
36

5
36
6
37
6
38

6
39
7
40

7
41
7
42

7
43
7
44

*
45
*
46
47
8
48
9*
9*

10
*
11
*
11
*
12
*
12
*
12
*
12
*
13
*
14
*
14
*
14
*
15
16

8817
18

1
1
1

BLOWER &
WHEELKühl+ Medium-Chassis 2012 Parts
1
Kühl
List

15
61817505
Item
Number
16 Part
60542004
1
61850227
17
61804901
1
61850140
18
61804100
1
61850244
19
61907212
1
61850141
20
61821500
*
*
21

61834800
61807256
61834801
61804310

61717118
61803800
61717119
62400210

61718105
62400134
3760500
60301802
3760520
62400124
3760513
61802600
3760545
91400402

3760451
61715800
25022032
61028900
62601016
61028901
62601013
61937100
62601010
61816800
62601012
62400426
61080529
61819817
61080557
61109514
61080588
61819715
61080591
60610305
61080592
61717302
61820700
61808414
61820702
61825721
61820401
60294421
25063605
62601015
61764583
61824405
61764570
61883102
61878611
61818900
61871495
61812900
61871498
61812901
60500390
61821801
60500394
61715800
60500398
60846016
60500399
60846017
60179904
60073300
60610616
61819601
60610617
61826400
60610618
62601019
61817505
60542004

BLOWER WHEEL
SCROLL MED
Part Description
FAN
BLADE

CONDENSOR
SHROUD, MEDCOIL
CONDENSOR
COIL
MOUNT, FAN MOTOR

CONDENSOR
COIL
INNERWALL ASY
MED
CONDENSOR
COIL S/M/L
ASSY DOOR/SLIDE

EXPANDED
METAL
GRILLE
PAINTED MED
CONNECTOR
FRESH
AIR S/M
SCRIPT
FRIEDRICH 2010 "FESTOON"
DECK SML/MED
SPEEDNUT
PUSH MED
TYPE
INSUL L/S PANEL
EVAPORATOR
COIL
AIRFOIL SM/MED/SH
EVAPORATOR
COILS/M
INSUL TOP COVER
EVAPORATOR
COIL
COVER TOP S/M

EVAPORATOR
COIL
BLOWER FR MED
EVAPORATOR
COILMED
INSUL INNERWALL
STRAINER
.312 COIL
PANEL CONTROL
MED
STRAINER
.375 COIL
ASSY PARTITION
MED

COMPRESSOR
KIT 62200311
BASEPAN
COMPRESSOR
KIT 62200108
BASEPAN
COMPRESSOR
KIT 62200105
DRAINPAN SML/MED
COMPRESSOR
KIT 62200106
AIR FILTER ASSEMBLY
MED

COMPRESSOR
KIT 62200121
TOOL MANIFOLD
CAPILLARY
TUBE
CLIP MANIFOLD TOOL
CAPILLARY
TUBE MOUNT SML/MED
ASSY
UI HOLDER

CAPILLARY
TUBE S/M
BRACE SHROUD,
CAPILLARY
TUBE
COMPRESSOR
STUD
CAPILLARY
TUBE
COUNTER WEIGHT
REVERSING
VALVE
KIT + SOLENOID KIT
COMPRESSOR
GROMMET

USER
INTERFACE
SERVICE KIT
COMPRESSOR
GROMMET
ELECTRONIC
CONTROL SERVICE KIT CL-EH 3SP GEN2
PANEL L/S MED
ELECTRONIC
INSUL L/S AIR CONTROL
DECK S/M SERVICE KIT COOL 4SP GEN2

ELECTRONIC
SERVICE
HP-EH 3SP GEN2
DECORATIVE CONTROL
FRONT SERVICE
KITKIT
MED
CAPACITOR
ANGLE WNGBRD SIDE PAINTED MED
CAPACITOR
BRKT SUPPORT ASSY PAINTED
CAPACITOR
ANGLE WINGBOARD TOP PAINTED SML/MED
CAPACITOR
WINDOW SEAL GASKET
CAPACITOR
CHASSIS GASKET SEAL
CAPACITOR
STRAP 2.0
DIAMETER
SILL PLATE PAINTED
SML/MED
CAPACITOR
STRAP
DIAMETER
SHELL OUTER
MED 2.5
REPLMT
2010
CAPACITOR
MOUNTING
WINGBOARD MED 2010 BRACKET
COIL
SOLENOID
208/230VAC
REMOTE
CONTROL
SERVICE KIT
OVERLOAD
CHECK VALVE
OVERLOAD
48 PAD ISOLATION 3X6
HEATER 4.0
KW @BRACKET
230V
MOUNT
FAN
MOTOR
SHIELD
BOTTOM S/M 3R
FAN
MOTOR
SHIELD
BOTTOM S/M 4R

1
1
1
1
1
1
1
EM18N34-A
EM24N34-A
SM15N10-A
SM18N30-A
SM21N30-A
SM24N30-A
YM18N34-A
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

1
1

1
1
1

1
31

1
1

1
31

1
1
1

31
1

1
1
1

1
1

1
1
1

1
1

1
1
1

1
1
1
1

1
1
1
1
1

1
1
1
31

1
1
1
1

1
31

31
1

31
1
1

1
1
1
1

1
1
1

1
1
1
1
1

1
2

2
3
2

2
3
3

2
3
2
1

13
1
1
1
2
2
1
1
1
1
1
1
1
1

2
3
2
3
1

2
3
2

13
1
1
1

2
3
2
3
1
1
1
1
2
2
1
1
1
1
1
1
1

1
1
1
2
2
1
1
1
1
1
1
1

13
1
1
1
2
12
1
1
1
1
1
1
1

13
1
1
1
1

1
1

1
12
1
1
1
1

1
2
1
1
1
1

3
2
3
1
1
1
1

1
1
1
1
1
1

1
1
1
1
1

1
1
1

1
1
1
1
1
1
1
1
1

1
1
1
1
1
1
1
1
1
1

1
1
1

1
1

BLOWER
WHEEL
SHELL GUIDE
S/M/L
BLOWER
CHASSIS WHEEL
RETAINER WIRE

BLOWER
WHEEL
THERMISTOR
SENSOR KIT
SCROLL MED
FAN BLADE

12
1
1
1
1

2
1
1
1
1

1
12
1
1
1
1

61804901

SHROUD, MED

61804100

MOUNT, FAN MOTOR

SUPPLY
CORDMED
15A 125V
SHIELD HEAT
SUPPLY
CORD
13A 250V
COUNTER WEIGHT
SUPPLY
CORD
20AW/WIK
250V
ASSY PLSTC
BAG

SUPPLY
CORD
30AW/O
250V
ASSY PLSTC
BAG
WIK
CONDENSATE
DRAINFOAM
VALVE
GASKET URETHANE

1
1
2
1
1
1
1

Kühl & Kühl+ Large-Chassis 2012 Parts List
Item Part Number
1
61850238
1
62050222
1
61850246
*
61818522

Part Description
CONDENSOR COIL
CONDENSOR COIL
CONDENSOR COIL
EXPANDED METAL GRILLE PAINTED LRG

EL25N35-A EL36N35-A SL22N30-A SL25N30-A SL28N30-A SL36N30-A YL24N35-A
1
1
1
1
1
1
1
1
1
1
1
1
1
1

*
*
2
2
2

60169120
91002900
61896305
62050004
62050041

SCRIPT FRIEDRICH 2010 "FESTOON"
SPEEDNUT PUSH TYPE
EVAPORATOR COIL
EVAPORATOR COIL
EVAPORATOR COIL

1
3

*
3

61834801
61717134

STRAINER .375 COIL
COMPRESSOR KIT 62200205

3
3
3

61717131
61718113
61717130

COMPRESSOR KIT 62200108
COMPRESSOR KIT 62200207
COMPRESSOR KIT 62200200

*
*
*
*

1390000
3760482
3760473
3760512

CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE

*
4
5
6

3760518
25022032
62601016
62601013

CAPILLARY TUBE
REVERSING VALVE KIT + SOLENOID KIT
USER INTERFACE SERVICE KIT
ELECTRONIC CONTROL SERVICE KIT CL-EH 3SP GEN2

6
6
7
7

62601011
62601012
61080589
61080588

ELECTRONIC CONTROL SERVICE KIT COOL 3SP GEN2
ELECTRONIC CONTROL SERVICE KIT HP-EH 3SP GEN2
CAPACITOR
CAPACITOR

7
7
*
*

61080520
61080514
61820700
61820702
61820401

CAPACITOR
CAPACITOR
CAPACITOR STRAP 2.0 DIAMETER
CAPACITOR STRAP 2.5 DIAMETER
CAPACITOR MOUNTING BRACKET

8
10
11
11
12

25063605
61878612
61871466
61871467
60500394

COIL SOLENOID 208/230VAC
HEATER 5.2 KW @ 230V
FAN MOTOR
FAN MOTOR
SUPPLY CORD 13A 250V

12
12

60500398
60500399

SUPPLY CORD 20A 250V
SUPPLY CORD 30A 250V

13
14
14
14
14
15

60179904
60610617
60610619
60610620
60610620
61818100

16
17
18

1
3
1

1
3

1
3
1

1
1
1

1
1

3
1

1
1
1
1
2

2
2

1
1

1
1
1

1
1

1
1
1

CONDENSATE DRAIN VALVE
BLOWER WHEEL
BLOWER WHEEL
BLOWER WHEEL
BLOWER WHEEL
SCROLL LRG

1
1

60542007
61807702
61806700

FAN BLADE
SHROUD, LRG
MOUNT, FAN MOTOR

1
1
1

19
20
*
21
*
8922

61907111
61821500
61814806
61818000
61817600
61820201

INNERWALL ASY LRG
ASSY DOOR/SLIDE S/M/L
CONNECTOR FRESH AIR LRG
DECK LRG
INSUL L/S PANEL LRG
AIRFOIL LRG

61818201

INSUL, TOP COVER LRG

1
1
1
1

1
1

1
1
1

1
1
1
1
1
1

14
15
16

60610620
61818100
60542007

BLOWER WHEEL
SCROLL LRG
FAN BLADE

1
1
1

1
1

61807702

SHROUD, LRG

18
19

61806700
61907111

INNERWALL ASY LRG

1
1

61821500

ASSY DOOR/SLIDE S/M/L

MOUNT, FAN&
MOTOR
1
1
1
1
1 List
1
Kühl
Kühl+ Large-Chassis
2012
Parts

* Part
61814806
Item
Number
21
61818000
1
61850238
61817600
1*
62050222
22
61820201
1
61850246
23
61818201
*
61818522
24
61906600
*
60169120
25
61817800
*
91002900

CONNECTOR
FRESH AIR LRG
Part Description
DECK LRG COIL
CONDENSOR
INSUL L/S PANEL
CONDENSOR
COILLRG
AIRFOIL LRG COIL
CONDENSOR
INSUL, TOP METAL
COVERGRILLE
LRG PAINTED LRG
EXPANDED
COVER TOP
LRG 2010 "FESTOON"
SCRIPT
FRIEDRICH
BLOWER FRONT
SPEEDNUT
PUSHLRG
TYPE

1
1
1
1
1
1
1
EL25N35-A
EL36N35-A
SL22N30-A
SL25N30-A
SL28N30-A
SL36N30-A
YL24N35-A
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
31
31
31
31
31
31
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
1
1

26
2
27
2
28
2
29
*
29
3

61816902
61896305
61807257
62050004
61807010
62050041
61809515
61834801
61809516
61717134

INSUL INNERWALL
EVAPORATOR
COILLRG
PANEL
CONTROL
LRG
EVAPORATOR COIL
ASSY PARTITION
LRG
EVAPORATOR
COIL
BASEPAN .375 COIL
STRAINER
BASEPAN
COMPRESSOR
KIT 62200205

29
3
29
3
30
3

61809517
61717131
61809518
61718113
61807400
61717130

BASEPAN
COMPRESSOR
KIT 62200108
BASEPAN
COMPRESSOR
KIT 62200207
DRAINPAN
LRG
COMPRESSOR KIT 62200200

1
1
1

31
*
32
*
*
33
*

62400321
1390000
62400134
3760482
60301802
3760473
62400318
3760512

AIR FILTER ASSEMBLY
LRG
CAPILLARY
TUBE
TOOL MANIFOLD
CAPILLARY
TUBE
CLIP
MANIFOLD
CAPILLARY
TUBETOOL
ASSY UI HOLDERMOUNT
LRG
CAPILLARY
TUBE

1
21
1

1
1
21

1
1
1

34
*
35
4
35
5
36
6

61810000
3760518
91400402
25022032
61715800
62601016
1150934
62601013

BRACE SHROUD,
CAPILLARY
TUBE LARGE
COMPRESSOR
STUDKIT + SOLENOID KIT
REVERSING VALVE
COUNTER
WEIGHTSERVICE KIT
USER
INTERFACE
COMPRESSORCONTROL
GROMMET
ELECTRONIC
SERVICE KIT CL-EH 3SP GEN2

2
3
12
13

2
3

36
6
37
6
37
7
38
7

61028902
62601011
61937000
62601012
61937002
61080589
61818300
61080588

COMPRESSORCONTROL
GROMMET
ELECTRONIC
SERVICE KIT COOL 3SP GEN2
PANEL L/S LRG
ELECTRONIC
CONTROL SERVICE KIT HP-EH 3SP GEN2
PANEL L/S LRG PTCR
CAPACITOR
INSUL L/S AIR DECK LRG
CAPACITOR

39
7
40
7
42
*
43
*

62400427
61080520
61819818
61080514
61819710
61820700
60610305
61820702

DECORATIVE FRONT SERVICE KIT LRG
CAPACITOR
ANGLE WNGBRD SIDE PAINTED LRG
CAPACITOR
ASSY ANGLESTRAP
WINGBOARD
TOP LRG
CAPACITOR
2.0 DIAMETER
WINDOW SEAL
GASKET
CAPACITOR
STRAP
2.5 DIAMETER

44
45
8
46
10
47
11
48
11
*
12

61717302
61820401
61808415
25063605
61825730
61878612
60294426
61871466
62601015
61871467
61108801
60500394

CHASSIS GASKET
SEAL BRACKET
CAPACITOR
MOUNTING
SILL PLATE
PAINTED
LRG
COIL
SOLENOID
208/230VAC
SHELL OUTER
REPLMT 2010
HEATER
5.2 KWLRG
@ 230V
WINGBOARD
FAN
MOTOR LRG 2010
REMOTE
CONTROL SERVICE KIT
FAN
MOTOR
SOLID STATE
SUPPLY
CORDRELAY
13A 250V

*
12
*
12

61768203
60500398
61883803
60500399

BOX EXTERNAL
RELAY
SUPPLY
CORD 20A
250V
PTCR RESISTOR
HARD
SUPPLY
CORD 30A
250VSTART

*
13
*
14
*
14
*
14
*
14
*
15

61883804
60179904
61824405
60610617
61883102
60610619
61883101
60610620
61818900
60610620
61813501
61818100

PTCR MNTG CLIP
PTCAUX36-520H
RND
CONDENSATE
DRAIN
VALVE
CHECK VALVE
BLOWER
WHEEL
48 PAD ISOLATION
BLOWER
WHEEL 3X6
48 PAD ISOLATION
BLOWER
WHEEL 2X4
HEATER
MOUNT
BLOWER WHEEL BRACKET
SHIELD BOTTOM
LRG 4R
SCROLL
LRG

1
1

*
16
*
17

61821900
60542007
60846016
61807702

SHIELD
HEAT LRG
FAN
BLADE
ASSY PLSTC
SHROUD,
LRGBAG W/WIK

*
18
*
19
*
20
*
*
21

60846017
61806700
60073300
61907111
61819601
61821500
61826400
61814806
62601019
61818000

ASSY PLSTC
W/O WIK
MOUNT,
FAN BAG
MOTOR
GASKET URETHANE
INNERWALL
ASY LRGFOAM
SHELLDOOR/SLIDE
GUIDE S/M/LS/M/L
ASSY
CHASSIS RETAINER
CONNECTOR
FRESHWIRE
AIR LRG
THERMISTOR
DECK
LRG SENSOR KIT

1
1
1

1
14
1
1

9022

61817600
61820201

INSUL L/S PANEL LRG
AIRFOIL LRG

61818201

INSUL, TOP COVER LRG

1
13

1
1

1
1
1
1
1

1
1
1
1

1
1

1
1
1

1
1

1
1
21
1

1
1
1
21
1

1
1
21

2
3
12
3

1
1

1
1
2
1
1
1
1
1
1
1
1

1
1

1
1
1
1
2
13
1
3
1

1
1

1
2
1
1

1
1
2
1
1

1
12
1
1

1
1
1
1
1
1

1
1
1

1
1

1
1
1
1
1
1
1

1
1
1

1
1

1
1
14
1
1

1
1

1
1
1

1
1

1
14
1
1

1
1
14
1
1

1
1

1
1
1
1
14
1
1

Addendum 1
Schedule Table with Energy Saving Values
Pre Programmed Residential Schedule Option 1
Period

Sun
Start Time
System Mode
Fan Mode
Fan Speed
Set Point Cool
Set Point Heat

Mon
600 Start Time
Cool System Mode
Auto Fan Mode
Low Fan Speed
78
Set Point Cool
70
Set Point Heat

600
Cool
Auto
Low
78
70

Tues
Start Time
System Mode
Fan Mode
Fan Speed
Set Point Cool
Set Point Heat

600
Cool
Auto
Low
78
70

Wed
Start Time
System Mode
Fan Mode
Fan Speed
Set Point Cool
Set Point Heat

600
Cool
Auto
Low
78
70

Thur
Start Time
System Mode
Fan Mode
Fan Speed
Set Point Cool
Set Point Heat

600
Cool
Auto
Low
78
70

Fri
Start Time
System Mode
Fan Mode
Fan Speed
Set Point Cool
Set Point Heat

600
Cool
Auto
Low
78
70

Sat
Start Time
System Mode
Fan Mode
Fan Speed
Set Point Cool
Set Point Heat

600
Cool
Auto
Low
78
70