Mitsubishi Electronics Split Type Heat Pump Air Conditioners Pmfy P08Nbmu E Users Manual OC341B 1.qxp

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OC341B--1.qxp

07.7.11 1:29 PM

Page 1

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

July 2007
No. OC341
REVISED EDITION-B

TECHNICAL & SERVICE MANUAL
R410A / R22
Indoor unit
[Model names]
PMFY-P06NBMU-E

PMFY-P08NBMU-E

PMFY-P12NBMU-E

PMFY-P15NBMU-E

[Service Ref.]

PMFY-P06NBMU-E
PMFY-P06NBMU-E1
PMFY-P08NBMU-E
PMFY-P08NBMU-E1
PMFY-P12NBMU-E
PMFY-P12NBMU-E1
PMFY-P15NBMU-E
PMFY-P15NBMU-E1

Revision:
• PMFY-P06/08/12/15NBMU-E1 are
added in REVISED EDITION-B.
• Some descriptions have been
modified.
• Please void OC341 REVISED
EDITION-A.

NOTE:
• This manual describes only
service data of the indoor units.
• RoHS compliant products have
 mark on the spec name
plate.
• For servicing RoHS compliant
products, refer to the RoHS
PARTS LIST.

CONTENTS
1. TECHNICAL CHANGES·······················2
2. FEATURES ···········································2
3. PART NAMES AND FUNCTIONS ········3
4. SPECIFICATION ···································5
5. OUTLINES AND DIMENSIONS············9
6. WIRING DIAGRAM·····························10
7. REFRIGERANT SYSTEM DIAGRAM ···12
8. MICROPROCESSOR CONTROL·······13
9. TROUBLESHOOTING ························20
10. DISASSEMBLY PROCEDURE···········27
11. PARTS LIST········································30
12. RoHS PARTS LIST·····························33
INDOOR UNIT

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Page 2

TECHNICAL CHANGES

PMFY-P06NBMU-E
PMFY-P08NBMU-E
PMFY-P12NBMU-E
PMFY-P15NBMU-E

➔
➔
➔
➔

PMFY-P06NBMU-E1
PMFY-P08NBMU-E1
PMFY-P12NBMU-E1
PMFY-P15NBMU-E1

1. FAN MOTOR(MF) has been changed.
2. CONTROLLER BOARD(I.B) has been changed.

2

FEATURES

Indoor Unit

Models
PMFY-P06NBMU-E
PMFY-P08NBMU-E
PMFY-P12NBMU-E
PMFY-P15NBMU-E

Cooling capacity / Heating capacity
6,000 / 6,700 Btu/h
8,000 / 9,000 Btu/h
12,000 / 13,500 Btu/h
15,000 / 17,000 Btu/h

1. Fresh Air Intake
Air recycled indefinitely can become stale and stagnant with air quality suffering significantly. Fresh air is the
answer and it is for this reason that the PMFY- series takes in air directly from outdoors. This fresh air intake
allows you to enjoy the comfort of crisp, refreshing air in the confines of your living or working space.

2. Light and Compact
The main unit weighs only 31 lb. and the panel merely 7 lb. This makes the PMFY- series one of the lightest in the
industry. The unit size is also quite small, having been standardised to a strikingly compact 33-5/8 inch. All of
this make the chore of installation and maintenance that much simpler and easier.

2

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3

Page 3

PART NAMES AND FUNCTIONS

● Indoor Unit

Auto Air Swing Vane
Disperses airflow up and
down and adjusts the angle
of airflow direction.

Guide vane
Air flow can be changed to horizontal
by moving the guide vane to the left or right.

Horizontal Air Outlet

Filters
Remove dust and pollutants
from return air.

Air intake
Returns air from room.

● Wired remote controller
Once the controllers are set, the same operation mode can be repeated by simply pressing the ON/OFF button.

ON/OFF button

Temperature setting buttons
Down

Fan Speed button

Up
Timer Menu button
(Monitor/Set button)

Filter
button
( button)

Mode button (Return button)

TEMP.

ON/OFF

Set Time buttons

Check button (Clear button)

Back
Ahead

Test Run button

MENU
BACK

MONITOR/SET

ON/OFF

FILTER

DAY

CHECK TEST

Airflow Up/Down button
Timer On/Off button
(Set Day button)

PAR-21MAA

CLOCK

OPERATION

CLEAR

Louver button
(
Operation button)
To return operation
number

Opening the
lid

Ventilation button
( Operation button)
Built-in temperature sensor

3

To go to next operation
number

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● Wired remote controller
Display Section
For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.

Day-of-Week

“Sensor” indication

Shows the current day of the week.

Displayed when the remote controller
sensor is used.

Time/Timer Display
Shows the current time, unless the simple or Auto Off
timer is set.
If the simple or Auto Off timer is set, the time to be
switched off is shown.

“Locked” indicator
Indicates that remote controller buttons have been locked.

Identifies the current operation
“Clean The Filter” indicator

Shows the operating mode, etc.
*Multilanguage display is available.

To be displayed on when it is time to
clean the filter.

TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER

AFTER OFF

ERROR CODE

FUNCTION
FILTER

˚F˚C

“Centrally Controlled” indicator
Indicates that operation from the
remote controller has been prohibited by a master controller.

˚F˚C

WEEKLY
SIMPLE
AUTO OFF

ONLY1Hr.

Timer indicators
The indicator comes on if the corresponding timer is set.

Fan Speed indicator
Shows the selected fan speed.

“Timer is Off” indicator
Indicates that the timer is off.

Up/Down Air Direction indicator
Shows the direction of the
outcoming airflow.

Room Temperature display
Shows the room temperature. The room
temperature display range is 46~102°F.
The display blinks if the temperature
is less than 46°F or 102°F or more.

Ventilation indicator
Appears when the unit is running in
Ventilation mode.

“One Hour Only” indicator

Temperature Setting
Shows the target temperature.

Displayed if the airflow is set to
low or downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off in one hour,
when the airflow direction also
changes.

Louver display
Indicates the action of the swing louver.
Does not appear if the louver is not
running.

(Power On indicator)
Indicates that the power is on.

Note:

● “PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.
● “NOT AVAILABLE” message
This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as
far as any of the indoor units is equipped with the function.

4

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4

Page 5

SPECIFICATION

4-1. SPECIFICATIONS
PMFY-P06NBMU-E
PMFY-P06NBMU-E1

Item

PMFY-P08NBMU-E
PMFY-P08NBMU-E1

PMFY-P12NBMU-E
PMFY-P12NBMU-E1

PMFY-P15NBMU-E
PMFY-P15NBMU-E1

V·Hz

Cooling capacity

Btu/h

6,000

8,000

12,000

15,000

Heating capacity

Btu/h

6,700

9,000

13,500

17,000

Cooling

kW

0.042

0.042

0.044

0.054

Heating

kW

0.042

0.042

0.044

0.054

Cooling

A

0.20

0.20

0.21

0.26

Heating

A

0.20

0.20

0.21

0.26

Electric characteristic

Power

Input

Current

Exterior
(munsell symbol)

—

Single phase 208-230V 60Hz

Unit : Galvanized sheets · Standard grilles : ABS resin acrylic coating Munsell<6.4Y 8.9/0.4>

in.

9-1/16<1-3/16>

Dimensions Width

in.

31-15/16<39-3/8>

Depth

in.

15-9/16<18-1/2>

Heat exchanger

—

Cross fin

Fan ✕ No

—

Line flow fan ✕ 1

Air flow W3

CFM

a

n

Height

External
static pressure
Fan motor
output

230-250-280-300

250-280-300-320
0

kW

0.028

Insulator

—

Polyethylene sheet

Air filter

—

PP honey comb fabric

[in.

1/2"

[in.

1/4"

Field drain pipe size

[in.

1" O.D. (PVC pipe VP-20 connectable)

Noise level W3

dB

Product weight

lb.

F

in W.G.

Pipe
dimensions

Gas
side
Liquid
side

27-30-33-35

32-34-36-37
31<7>

Note 1. Rating conditions
Cooling: Indoor: D.B. 80°F W.B. 67°F
outdoor: D.B. 95°F W.B. 75°F
Heating: Indoor: D.B. 70°F
outdoor: D.B. 47°F W.B. 43°F
Note 2. The number indicated in < > is for the grille.
W 3. Air flow and the noise level are indicated as Low - Medium2 - Medium1 - High.

5

270-300-340-370

33-35-37-39

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Page 6

4-2. ELECTRICAL PARTS SPECIFICATIONS
Service Ref.
Symbol

PMFY-P06NBMU-E
PMFY-P06NBMU-E1

PMFY-P08NBMU-E
PMFY-P08NBMU-E1

PMFY-P12NBMU-E
PMFY-P12NBMU-E1

PMFY-P15NBMU-E
PMFY-P15NBMU-E1

Parts name
Room temperature
thermistor

TH21

Resistance 30˚F/15.8k", 50˚F/9.6k", 70˚F/6.0k", 80˚F/4.8k", 90˚F/3.9k", 100˚F/3.2k"

Liquid pipe thermistor

TH22

Resistance 30˚F/15.8k", 50˚F/9.6k", 70˚F/6.0k", 80˚F/4.8k", 90˚F/3.9k", 100˚F/3.2k"

Gas pipe thermistor

TH23

Resistance 30˚F/15.8k", 50˚F/9.6k", 70˚F/6.0k", 80˚F/4.8k", 90˚F/3.9k", 100˚F/3.2k"

Fuse
(Indoor controller board)

FUSE

250V 6A

Fan motor

MF

DC Brushless Motor
8-pole OUTPUT 28W
PN0H28-MB

Vane motor

MV

MSFJC 20M23
12V/380"

Drain pump

DP

PJV-1063
208-240V 50/60Hz

Drain sensor

DS

Linear expansion valve

LEV

DC12V Stepping motor drive
port dimension [3.2 (0~2000pulse)
EDM-40YGME

Power supply
terminal block

TB2

(L1, L2, GR) Rated to 330V 30A

w

Transmission
terminal block

TB5

(M1, M2, S) Rated to 250V 20A

w

MA-remote controller
terminal block

TB15

(1,2) Rated to 250V 10A

Thermistor resistance 30_F/6.3k", 50_F/3.9k", 70_F/2.5k", 80_F/2.0k", 90_F/1.6k", 100_F/1.3k"

w

wNote : Refer to WIRING DIAGRAM for the supplied voltage.

6

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Page 7

4-3. AIR CAPACITY TAKEN FROM OUTSIDE
PMFY-P·NBMU-E series are capable of taking air from outside. When taking air from outside, the duct fan is used.
The air capacity should be 20% or less of the airflow SPEC(Hi).
9-13/16

11-3/8

904-{1/8
6

4-1/4

/1
{3-15

Service Ref.
PMFY-P06NBMU-E
PMFY-P06NBMU-E1
PMFY-P08NBMU-E
PMFY-P08NBMU-E1
PMFY-P12NBMU-E
PMFY-P12NBMU-E1
PMFY-P15NBMU-E
PMFY-P15NBMU-E1

Air capacity taken from outside

300 CFM

60 CFM

320 CFM

64 CFM

320 CFM

64 CFM

370 CFM

74 CFM
Be sure to secure insulation
material by tape, etc.
CN51
on
indoor unit
board

5

~

Green
Yellow

1
Connector (5P)
Indoor unit side

Orange

MB

Red
Brown
Multiple remote
controller adapter
PAC-SA88HA-E

Installation at site
Be sure to secure insulation
material by tape, etc.

Indoor controller board
Distance between indoor
controller board and relay
must be within 33 feet.
Multiple remote
controller adapter
PAC-SA88HA-E

How to read curves
Curve in the
right graphs

(Unit:inch)

Air flow (Hi)

Operation in conjunction with duct fan (Booster fan)
●Whenever the indoor unit is operating, the duct fan
operates.
(1)Connect the optional multiple remote controller
adaptor (PAC-SA88HA-E) to the connector CN51
on the indoor controller board.
(2)Drive the relay after connecting the 12V DC relay
between the Yellow and Orange connector lines.
(w)Use a relay of 1W or smaller.
MB: Electromagnetic switch power relay for duct fan.
X: Auxiliary relay (12V DC LY-1F)

Duct characteristics
at site

CN51

Q

E

C
A

2

Q

A

D

3

Q…Designed amount of fresh air
intake

A…Static pressure loss of fresh air
intake duct system with air flow
amount Q

B…Forced static pressure at air conditioner inlet with air flow amount Q

C…Static pressure of booster fan with
air flow amount Q

D…Static pressure loss increase
amount of fresh air intake duct
system for air flow amount Q

E…Static pressure of indoor unit with
air flow amount Q

Qa…Estimated amount of fresh air
intake without D


Characteristic diagram of air capacity taken from outside of PMFY-P·NBMU-E
0.2
Static pressure (in.W.G.)

B

A

0

C

1

/16

-13
{4

Fresh air intake hole
(Knockout)

Fresh air intake hole
(Knockout)

0.1
00
2 intake
-0.1
1 intake
-0.2
-0.3
-0.4

Q
Qa

0

10

20

30

40
Air flow (CFM)

7

50

60

70

80

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Page 8

4-4. NOISE CRITERION CURVES
NOTCH SPL(dB)
High
35
Medium1
33
30
Medium2
Low
27

LINE

90

80

70

NC-70

60
NC-60

50
NC-50

40
NC-40

30
NC-30

20
NC-20

10

APPROXIMATE THRESHOLD OF HEARING
FOR CONTINUOUS NOISE

63

125

250

500

1000

2000

4000

PMFY-P08NBMU-E
PMFY-P12NBMU-E
PMFY-P08NBMU-E1
PMFY-P12NBMU-E1
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

PMFY-P06NBMU-E
PMFY-P06NBMU-E1

8000

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

NOTCH SPL(dB)
High
39
Medium1
37
35
Medium2
Low
33

80

70

NC-70

60
NC-60

50
NC-50

40
NC-40

30
NC-30

20

10

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

63

125

NC-20

250

500

1000

NC-70

5ft
60
NC-60

50

MICROPHONE

NC-50

40
NC-40

30
NC-30

10

63

125

NC-20

250

500

1000

2000

4000

8000

UNIT
CEILING

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

4000

LINE

80

20

2000

BAND CENTER FREQUENCIES, Hz

90

70

LINE

90

BAND CENTER FREQUENCIES, Hz

PMFY-P15NBMU-E
PMFY-P15NBMU-E1

NOTCH SPL(dB)
High
37
Medium1
36
34
Medium2
Low
32

8000

BAND CENTER FREQUENCIES, Hz

8

16-15/16(430)
Ceiling opening
13-3/8(340) Suspension bolt pitch

1-13/18(46)
1-11/16(43)

Refrigerant
pipe(liquid)
O.D.{1/4"(6.35) 3-3/8(96)

Ceiling
Drain pan
panel
Same line

Left side

Lower view

7-7/8(200)

7-7/8(200)

Panel(grille):PMP-16BMU

23-5/8(600)

39-3/8(1000) outer side of grille

drain pan

{1-31/32(50)

31-15/16(812)
29-7/8(759)

Air outlet(lower)

13/16(20)
2-15/18(74.5)
1-1/32(26)

Outer line of grille

1-3/16(30)

Terminal block for
remote controller

Electrical box

Center line of unit

2-1/16(53)

39-3/8(1000) outer side of grille
37-13-16(960) ceiling opening
31-15/18(811)suspension bolt pitch
29-7/8(759)
13/16(20)
13/16(20)

Front

2-3/16(56)

Refrigerant pipe(gas)
O.D.{1/2"(12.7)
15-9/16(395)
11-7/8(302)
10(254)
Drainage pipe
5-9/16(141) PVC pipe:
VP-20[O.D.{1"(26)]

3-3/8(96)

Ceiling panel

6-15/16(176)

Outer side of grille
18-1/2(470)

11/16(17.5) 11/16(17.5)

13/16(20)
2-15/18(74.5)
1-1/32(26)

1-9/16(40)

1-25/32(45)

1-25/32(45)

13/16(20)

13/16(20)
13/32(10) 7-13/16(198)

9
13/16(20) 9-1/16(230)

9-3/8(247)
2-11/16(69)

Top
Pipe cover
Liquid pipe
Gas pipe
PVC pipe:VP-20[I.D.{31/32"({25)]

O.D.{1-11/16({43)
O.D.{1/4"({6.35)
O.D.{1/2"({12.7)

/1
{3-15

)

Panel(grille):PMP-16BMU

Suspension bolt(M10 or W 3/8)

Fresh air intake hole

9-13/16(250) 11-3/8(288.5)

6(100

4-{1/8(2.8) Burring hole

Mounting plate

Installation space required around indoor unit

Terminal block for transmission

Right side

Terminal block for power supply

Knockout

90-

Details of fresh air intake hole

Drainage piping

Refrigerant
piping

2)

2-3/8(60)

(12

Outer side of grille

3/6

18-1/2(470)

-1
{4
4-5/16 (110)

PMFY-P06NBMU-E1
PMFY-P08NBMU-E1
PMFY-P12NBMU-E1
PMFY-P15NBMU-E1

9-1/16(230)
9-1/2
(235) or more

PMFY-P06NBMU-E
PMFY-P08NBMU-E
PMFY-P12NBMU-E
PMFY-P15NBMU-E

4-5/16
(110)

5

07.7.11 1:29 PM

4-1/4
(108)

OC341B--1.qxp
Page 9

OUTLINES AND DIMENSIONS
Unit : in. (mm)

TH23



TO NEXT INDOOR UNIT

PULL BOX

FUSE(15A)

BREAKER
(15A)

1
2

L1
L2
G

TB2

S(SHIELD)
M2
M1

POWER SUPPLY
~ / N 208—230V 60Hz

TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V

TO MA-REMOTE
CONTROLLER
DC8.7-13V

MF

5

GRN / YLW

RED
BLU

TB5

TB15

BLU
BLU

ORN

ORN

(BLU)
(M-NET)
CN2M

LED2

CN3A
(BLU)

LED1

6
5
4 FAN
3 (WHT)
2
1

1
2

1
2
3

I.B
2 1
(BLK)
GAS
CN29

(WHT)
DRAIN
CN31

TH23

3 2 1

DS

2 1

TH21

CND
(RED)

FUSE
250V
6A

LEV

(WHT)
LEV
CN60

T

MV
1 2 3 4 5

1

(GRN)
VANE
CN6V

X1

DP

1 2 3

X1

6 5 4 3 2 1

(GRN)
REMOTE
INDICATION
CN52

1 5

(WHT)
CENTRALLY
CONTROL
CN51

5

6 5 4 3 2 1

6

BLU
BRN
ORN
YLW
RED
WHT

3 2 1

(WHT) (RED)
LIQUID INTAKE
CN21 CN20

2 1

TH22

BRN
RED
ORN
YLW
GRN

Note
1.At servicing for outdoor unit, always follow the wiring diagram of outdoor unit.
2.In case of using MA-Remote controller, please connect to TB15. (Remote controller wire is non-polar.)
3.In case of using M-NET, please connect to TB5. (Transmission wire is non-polar.)
4.Symbol [S] of TB5 is the shield wire connection.
5.Symbols used in wiring diagram above are,
: terminal block,
:connecter.
6.The setting of the SW2, SW3 dip switches differs in the capacity for the detail, refer to the fig : w1.
7.Please set the switch SW5 according to the power supply voltage.

A.B
Address board
SW1 Switch
Mode selection
SW5
Voltage selection
SW11
Address setting 1st digit
SW12
Address setting 2nd digit
SW14
Connection No.

2 1

(WHT)
CNP

CN25

2 1
CN27

ON
OFF
ON
OFF
ON
OFF

P08
P12
P15
123456

123456

123456

123456

SW2

ON
OFF

ON
OFF

ON
OFF

ON
OFF

(RED)
ADDRESS
CN42

(WHT)
REMOTE
SWITCH
CN32

4
3
2
1

(RED)
ADDRESS
CN81

3

1

8
7
6
5
4
3
2
1

4

8

SW3

(RED)
ADDRESS
CN43

4 3 2 1

0

(RED)
ADDRESS
CN82

8 7 6 5 4 3 2 1

1 2 3 4 5 6 7 8 9 10

1 2 3 4 5 6 7 8 9 10

1 2 3 4 5 6 7 8 9 10

1 2 3 4 5 6 7 8 9 10

A.B

(w2)Use copper supply wire.

ON
OFF

P06

Models



See fig : w1

1 2 3 4 5 6 1 2 3 4 5 6 7 8 910

TH22

SW4
SW3
SW2

1 2 34 5

LED on indoor board for service
Mark
Meaning
Function
Main power supply (Indoor unit:208-230V)
LED1 Main power supply
Power on ➝ Lamp is lit.
Power supply for
Power supply for MA-Remote controller
LED2
MA-Remote controller on ➝ Lamp is lit.

ON
OFF
ON
OFF

Name
Room temp. detection
(32°F/15k", 77°F/5.4k")
Pipe temp. detection / Liquid
(32°F/15k", 77°F/5.4k")
Pipe temp. detection / Gas
(32°F1/15k", 77°F/5.4k")

SW5

Symbol
TH21
Thermistor

SW1

Name
Drain pump
Aux.relay
Transformer
Power supply (I.B)
Power supply (I.B)
Fan motor (with inner thermo)
Vane motor
Drain water lifting-up mech.
Drain sensor
Linear expansion valve
Terminal
Power supply
Transmission
block
MA-Remote Controller

1 2 3 4 5 6 7 8 910

Symbol
X1
T
LED1
LED2
MF
MV
DP
DS
LEV
TB2
TB5
TB15

ON
OFF

Name
Indoor controller board
Connector
Humidifier
Damper
Remote switch
Centrally control
Remote Indication
Switch
Capacity code
Mode selection
Model selection
Varistor
Fuse (6A / 250V)

0

0

2

Symbol
I.B
CN25
CN27
CN32
CN51
CN52
SW2
SW3
SW4
ZNR
FUSE

230V
208V

SWC SW14
SW12 SW11

CONNECTION
No.

[Legend]

1

10

1ST
DIGIT

6

07.7.11 1:29 PM

3RD
2ND
DIGIT DIGIT

OC341B--1.qxp
Page 10

WIRING DIAGRAM

PMFY-P06NBMU-E PMFY-P08NBMU-E PMFY-P12NBMU-E PMFY-P15NBMU-E



TO NEXT INDOOR UNIT

PULL BOX

FUSE
(15A)

BREAKER
(15A)

POWER SUPPLY
~ / N 208-230V 60Hz

TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V

TO MA-REMOTE
CONTROLLER
DC8.7-13V

GR

L2

L1

TB2

MF

(SHIELD)

GRN / YLW

BLU

RED

MS
3~

S

M2

M1

TB5

2

TB15
1

BLU
BLU

ORN

ORN

LED2

CN3A
(BLU)

t°

LED1

6

(WHT)

3 FAN

1

1 (BLU)
(M-NET)
2 CN2M

3

1

I.B
2 1
(BLK)
GAS
CN29

1

t°

TH23

(WHT)
DRAIN
CN31

3

DS

2 1

t°

2 1

TH21

U

1

FUSE
CND 3
(RED)

(WHT) (RED)
LIQUID INTAKE
CN21 CN20

t°

TH22

6

1

(WHT) 1
CENTRALLY
CONTROL
CN51

5

(WHT)LEV
CN60

T

5

M

M
1

MV

BRN
RED
BLU
ORN
YLW
WHT

LEV

Note
1.At servicing for outdoor unit, always follow the wiring diagram of outdoor unit.
2.In case of using MA-Remote controller, please connect to TB15. (Remote controller wire is non-polar.)
3.In case of using M-NET, please connect to TB5. (Transmission line is non-polar.)
4.Symbol [S]of TB5 is the shield wire connection.
5.Symbols used in wiring diagram above are,
: terminal block,
:connector.
6.The setting of the SW2, SW3 dip switches differs in the capacity for the detail, refer to the fig :w1.
7.Please set the switch SW5 according to the power supply voltage.

A.B
Address board
SW1 Switch
Mode selection
SW5
Voltage selection
SW11
Address setting 1st digit
SW12
Address setting 2nd digit
SW14
Connection No.

TH23

TH22

5

(GRN) 1
REMOTE
INDICATION
CN52

1

CN6V

M
1~
DP

3

X1

6 (GRN)VANE 1

2 1

(WHT)
CNP

CN25

SW2
SW3
SW4

2 1
CN27

1234 56
1 2 3 4 5 6 7 8 910

ON
OFF
ON
OFF
ON
OFF

P08
P12
P15

123456

123456

123456

123456

SW2

ON
OFF

ON
OFF

ON
OFF

ON
OFF

8

(WHT) 1
REMOTE
SWITCH
CN32 3

1

4
(RED)
ADDRESS
CN42

1

4

A.B

1

8

(RED)
ADDRESS
CN43

4

8

SW3

1 2 3 4 5 6 7 8 9 10

1 2 3 4 5 6 7 8 9 10

1 2 3 4 5 6 7 8 9 10

1 2 3 4 5 6 7 8 9 10

23

4 56

(RED)ADDRESS
CN82

Use Copper Supply Wire.

ON
OFF

P06

Models



(RED)
ADDRESS
CN81

See fig : w1

1 2 34 5

BRN
RED
ORN
YLW
GRN

2 3

2 3

1

LED on indoor board for service
Mark
Meaning
Function
Main power supply (Indoor unit:208-230V)
LED1 Main power supply
Power on
Lamp is lit.
Power supply for
Power supply for MA-Remote controller
LED2
MA-Remote controller on
Lamp is lit.

ON
OFF
ON
OFF

Name
Room temp. detection
(32°F/15kΩ, 77°F/5.4kΩ)
Pipe temp. detection / Liquid
(32°F/15kΩ, 77°F/5.4kΩ)
Pipe temp. detection / Gas
(32°F/15kΩ, 77°F/5.4kΩ)

230V

Symbol
TH21
Thermistor

SW5

Name
Drain pump
Aux.relay
Transformer
Power supply(I.B)
Power supply(I.B)
Fan motor
Vane motor
Drain water lifting-up mech.
Drain sensor
Linear expansion valve
Terminal
Power supply
Transmission
block
MA-Remote Controller

SW1

Symbol
X1
T
LED1
LED2
MF
MV
DP
DS
LEV
TB2
TB5
TB15

ON
OFF

Name
Indoor controller board
Connector
Humidifier
Damper
Remote switch
Centrally control
Remote Indication
Switch
Capacity code
Mode selection
Model selection
Varistor
Fuse (6A / 250V)

F 01

Symbol
I.B
CN25
CN27
CN32
CN51
CN52
SW2
SW3
SW4
ZNR
FUSE

SWC SW14

2
0 1
0 1

CONNECTION
No.

[Legend]

4 5 6
7 8 9

208V

1
7 8 9

1 2 3 4 5 6 7 8 910
SW12 SW11

789A
D
BC E

11

1ST
DIGIT

07.7.11 1:29 PM

3RD
2ND
DIGIT DIGIT

OC341B--1.qxp
Page 11

PMFY-P06NBMU-E1 PMFY-P08NBMU-E1 PMFY-P12NBMU-E1 PMFY-P15NBMU-E1

4 5 6

OC341B--1.qxp

7

07.7.11 1:29 PM

Page 12

REFRIGERANT SYSTEM DIAGRAM

PMFY-P06NBMU-E
PMFY-P06NBMU-E1

PMFY-P08NBMU-E
PMFY-P08NBMU-E1

PMFY-P12NBMU-E
PMFY-P12NBMU-E1

Thermistor TH23


PMFY-P15NBMU-E
PMFY-P15NBMU-E1

Strainer (#100mesh)

Gas pipe
Thermistor TH22

Flare connection

w1

w2
Liquid pipe

Heat exchanger
Strainer
(#50mesh)

Linear expansion valve
Strainer
(#100mesh)

Strainer pipe (#100mesh)

Thermistor TH21


Unit:in.(mm)
Service Ref.

Item

PMFY-P06/ P08/ P12/ P15NBMU-E
PMFY-P06/ P08/ P12/ P15NBMU-E1

Gas pipe

[1/2"(12.7)

Liquid pipe

[1/4"(6.35)
Unit:mm
PMFY-P06/ P08NBMU-E
PMFY-P06/ P08NBMU-E1

PMFY-P12/ P15NBMU-E
PMFY-P12/ P15NBMU-E1

Capillary tube w1

O.D.[4.6 o I.D.[3.4 o R200 O.D.[3.6 o I.D.[2.4 o R200

Capillary tube w2

O.D.[3.6 o I.D.[2.4 o R80

12

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8

Page 13

MICROPROCESSOR CONTROL

INDOOR UNIT CONTROL
8-1. COOL OPERATION

TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER

AFTER OFF

ERROR CODE

FUNCTION
FILTER

˚F˚C

˚F˚C

WEEKLY
SIMPLE
AUTO OFF

ONLY1Hr.

TEMP.

MENU
BACK
PAR-21MAA

MONITOR/SET

ON/OFF

ON/OFF

button is

FILTER

DAY

CLOCK


1 Press POWER ON/OFF button.
2 Press the operation MODE button to display COOL.
3 Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 2°F when the
or
pressed once. Cooling 67 to 87°F.

CHECK TEST

OPERATION

CLEAR

Control modes

Control details

Remarks

1. Functions regulated 1-1. Functions regulated by temperature
by temperature
• Room temperature ] desired temperature + 2°F ···Thermo ON
• Room temperature [ desired temperature ···Thermo OFF

1-2. Anti-freezing control
Detected condition : When the liquid pipe temp. (TH22) is 32°F or less in 16
minutes from compressors start up, anti-freezing control
starts and the thermostat OFF.
Released condition : The timer which prevents reactivating is set for 3 minutes,
and anti-freezing control is cancelled when any one of the
following conditions is satisfied.
1 Liquid pipe temp. (TH22) turns to be 50°F or above.
2 The condition of the thermostat OFF becomes
complete by thermoregulating, etc.
3 The operation mode becomes a mode other than COOL.
4 The operation stops.
1-3. Compressor time delay
• 3 minutes minimum off cycle.

2. Fan

By the remote controller setting (switch of 4 speeds)
Type

Fan speed notch

4 speeds

[Low], [Medium2], [Medium1], [High]

To be continued to the next page

13

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Page 14

From the preceding page
Control modes
3. Drain pump

Remarks

Control details
3-1. Drain pump control
• Always drain pump ON during the COOL and DRY mode operation.
(Regardless of the thermostat ON/ OFF)
• When the operation mode is changed from COOL or DRY to any other mode
(including Stop), the drain pump continues to run for 3 minutes.

Drain sensor function
• The indoor circuit board energizes the drain sensor at a fixed voltage for a fixed
duration. After energizing, the circuit board then compares the drain sensor’s
temperature to the one before energizing, and judges whether the sensor is in

✻1
Drain sensor
Indoor controller
board
CN31 1

→

the air or in the water.
Basic control system

2
3

• While drain pump is turned on, it will repeat the following control system and judge
whether the sensor is in the air or in the water.
Timing of
energizing
drain sensor

ON
·······Repeat
OFF
Stand by for
a minute

30
sec.

Stand by for
a minute

30
sec.

Detect the
temperature
before
energizing.
(T0)
Detect the
temperature
after
energizing.
(T1)

Judge whether
the sensor is in
the air or in the
water.

•Drain sensor temperature rise (∆t)
•Temperature of drain sensor before current is applied (T0)
•Temperature of drain sensor after current is applied (T1)
[ ∆t = T1 – T0 ]

(1) Initial setting : Start at COOL mode and horizontal vane.
(up/ down vane change) (2) Vane position : Horizontal →Downward A →Downward B →Downward C→Swing
→

4. Vane

(3) Restriction of the downward vane setting
When setting the downward vane A, B or C in [Medium1], [Medium2] or [Low] of
the fan speed notch, the vane changes to horizontal position after 1 hour has
passed.

14

✻1
"Only 1 Hr"
appears on the
wired remote
controller.

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Page 15

8-2. DRY OPERATION


1 Press POWER ON/OFF button.
2 Press the operation MODE button to display DRY.
3 Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 2°F when the
or
pressed once. Dry 67 to 87°F.

TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER

AFTER OFF

ERROR CODE

FUNCTION
FILTER

˚F˚C

˚F˚C

WEEKLY
SIMPLE
AUTO OFF

ONLY1Hr.

TEMP.

MENU
BACK
PAR-21MAA

MONITOR/SET

ON/OFF

ON/OFF

FILTER

DAY

CLOCK

CHECK TEST

OPERATION

CLEAR

Control modes

Remarks

Control details

1. Functions regulated 1-1. Dry mode temperature is controlled by TH21.
Dry mode ON Room temperature ] desired temperature + 2°F
by temperature
Dry mode OFF Room temperature [ desired temperature

Room
temperature

Dry mode Dry mode
ON
OFF
Room temperature (Ta) time (min) time (min)

3 min. passed since starting operation
Call

ON
Over 64°F

OFF

Ta ] 83°F

9

3

83°F > Ta ] 79°F

7

3

79°F > Ta ] 75°F

5

75°F > Ta

3

3
3

3

10

Unconditional

Less than 64°F

Dry mode OFF

1-2. Frozen prevention control
No control function
2. Fan

Indoor fan operation control depends on the compressor conditions.
Dry mode

Fan speed notch

ON

[Low]

OFF

Stop

Note: Remote controller setting is not acceptable.

3. Drain pump

button is

Same control as COOL operation

4. Vane
Same control as COOL operation
(up/ down vane change)

15

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Page 16

8-3. FAN OPERATION

1 Press POWER ON/OFF button.
2 Press the operation MODE button to display FAN.

TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER

AFTER OFF

ERROR CODE

FUNCTION
FILTER

˚F˚C

˚F˚C

WEEKLY
SIMPLE
AUTO OFF

ONLY1Hr.

TEMP.

MENU
BACK
PAR-21MAA

MONITOR/SET

ON/OFF

ON/OFF

FILTER

DAY

CLOCK

CHECK TEST

OPERATION

CLEAR

Control modes
1. Fan

2. Drain pump

Control details
Set by remote controller.
Type

Fan speed notch

4 speeds type

[Low], [Medium2], [Medium1], [High]

2-1. Drain pump control
The drain pump turns ON for the specified amount of time when any of the
following conditions is satisfied:
1 ON for 3 minutes after the operation mode is switched from COOL or DRY to
another operation mode (FAN).
2 ON for 6 minutes after the drain sensor is determined to be submerged
using the liquid level detection method given below.
3 ON for 6 minutes after indoor piping (liquid piping) temperature – indoor
room temperature [ -18°F, AND the drain sensor input is at the short or
open level.
(If condition 2 or 3 is still being met after the drain pump has been turned ON
for 6 minutes, the drain pump is kept ON for a further 6 minutes.)
2-2. Liquid level detection method
The liquid level is detected by determining whether or not the drain sensor is
submerged, based on the amount the temperature rises after self-heating the
sensor. This process is performed if any of the following conditions is satisfied:
1 Drain pump is ON.
2 Indoor piping (liquid piping) temperature – indoor room temperature [ -18°F
3 Indoor piping (liquid piping) temperature or indoor room temperature is at
the short or open level temperature.
4 Every 1 hour after the drain pump has been switched from ON to OFF.

Same as the control performed during the COOL operation, but with no restriction
3. Vane
(up/ down vane change) on the vane's downward blow setting.

16

Remarks

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Page 17

8-4. HEAT OPERATION

1 Press POWER ON/OFF button.
2 Press the operation MODE button to display HEAT.
3 Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 2°F when the
or
pressed once. Heating 63 to 83°F.

TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER

AFTER OFF

ERROR CODE

˚F˚C

˚F˚C

FUNCTION
FILTER
WEEKLY
SIMPLE
AUTO OFF

ONLY1Hr.

TEMP.

MENU
BACK
PAR-21MAA

MONITOR/SET

ON/OFF

ON/OFF

CLOCK


[DEFROST]
The [DEFROST] symbol is only displayed during the defrost operation.
[STANDBY]
The [STANDBY] symbol is only displayed during hot adjust mode.

FILTER

DAY

CHECK TEST

OPERATION

button is

CLEAR

Control modes

Remarks

Control details

1. Functions
regulated by
temperature

1-1. Minimum compressor off cycle is 3 minutes.
• Room temperature [ desired temperature -2°F ···Thermo ON
• Room temperature ] desired temperature ···Thermo OFF

2. Fan

Controlled by the remote controller (4-speed)
Priority is given to below-mentioned control mode
2-1. Stand by (hot adjust) mode
2-2. Preheating exclusion mode
2-3. Thermo OFF mode (When the compressor off by the thermoregulating)
2-4. Cool air prevention mode (Defrosting mode)
2-1. Stand by (hot adjust) mode
The fan controller becomes the stand by (hot adjust) mode for the following
conditions.
1 When starting the HEAT operation
2 When the thermoregulating function changes from OFF to ON.
3 When releasing the HEAT defrosting operation
✻1
"STAND BY"
will be displayed
during the stand
by (hot adjust)
mode.

Hot adjust mode ✻1
Set fan speed by the remote controller
[Low]
[Extra Low]

A

B

C

A: Stand by (hot adjust) mode start
B: 5 minutes have passed since the condition A or the indoor liquid pipe
temperature turned 95°F or more
C: 2 minutes have passed since the condition A
(Terminating the stand by (hot adjust) mode)
2-2. Preheating exclusion mode
When the condition changes the auxiliary heater ON to OFF
(thermoregulating or operation stop, etc), the indoor fan operates in [Low] mode for
1 minute.

✻1
This control is
same for the
model without
auxiliary heater.

To be continued to the next page

17

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Page 18

From the preceding page
Control details

Control modes
2. Fan

Remarks

2-3. Thermo OFF mode
When the thermoregulating function changes to OFF, the indoor fan operates in
[Extra low].
2-4. Heat defrosting mode
The indoor fan stops.

No drain pump operation
However, when the control changes from COOL or DRY operation, the drain pump
operates for 3 minutes.

4. Vane control
(Up/ down vane
change)

(1) Initial setting : OFF → HEAT···[last setting]
When changing the mode from exception of HEAT to HEAT
operation ···[Downward C]
(2) Vane position :
Horizontal →Downward A →Downward B →Downward C→Swing
→

3. Drain pump

(3) Restriction of vane position
1 The vane is horizontally fixed for the following modes.
(The control by the remote controller is temporarily invalidated and controlled by
the unit.)
• Thermo OFF
• Stand by (hot adjust) [Extra low] mode
• Heat defrost mode

18

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Page 19

8-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION]

TIME SUN MON TUE WED THU FRI SAT
TIMER
Hr
ON
AFTER

AFTER OFF

ERROR CODE

˚F˚C

˚F˚C

WEEKLY
SIMPLE
AUTO OFF

ONLY1Hr.

TEMP.

MENU
BACK
PAR-21MAA

MONITOR/SET

FUNCTION
FILTER

ON/OFF

ON/OFF

FILTER

DAY

CLOCK

CHECK TEST

OPERATION


1 Press POWER ON/OFF button.
2 Press the operation MODE button to display AUTO.
3 Press the TEMP. button to set the desired temperature.
NOTE: The set temperature changes 2°F when the
or
button is
pressed once. Automatic 67 to 83°F.
When in AUTO mode, the unit will switch from either heat or cool
automatically to maintain the set temperature.

CLEAR

Control details

Control modes

Remarks

1. Initial value of HEAT mode for room temperature < Desired temperature
operation mode COOL mode for room temperature ] Desired temperature
2. Mode change (1) HEAT mode → COOL mode
Room temperature ] Desired temperature + 3°F or 3 minutes has passed
(2) COOL mode → HEAT mode
Room temperature [ Desired temperature - 3°F or 3 minutes has passed
3. COOL mode

Same control as cool operation

4. HEAT mode

Same control as heat operation

8-6. WHEN UNIT IS STOPPED
Control modes
1. Drain pump

Control details
1-1. Drain pump control
The drain pump turns ON for the specified amount of time when any of the
following conditions is satisfied.
(regardless of whether the compressor is ON or OFF)
1 ON for 3 minutes after the operation mode is switched from COOL or DRY to
another operation mode (HEAT mode).
2 ON for 6 minutes after the drain sensor is determined to be submerged using the
liquid level detection method given below.
3 ON for 6 minutes after indoor piping (liquid piping) temperature – indoor room
temperature [ 14°F, and the drain sensor input is at the short or open level.
(If condition 2 or 3 is still being met after the drain pump has been turned ON for 6
minutes, the drain pump is kept ON for a further 6 minutes.)
1-2. Liquid level detection method
The liquid level is detected by determining whether or not the drain sensor is
submerged, based on the amount the temperature rises after self-heating the
sensor.
This process is performed if any of the following conditions is satisfied:
1 Drain pump is ON.
2 Indoor piping (liquid piping) temperature – indoor room temperature [ 14°F
(except during defrosting)
3 Indoor piping (liquid piping) temperature or indoor room temperature is at the
short or open level temperature.
4 Every 1 hour after the drain pump has been switched from ON to OFF.

19

Remarks

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9

07.7.11 1:29 PM

Page 20

TROUBLE SHOOTING

9-1. HOW TO CHECK THE PARTS
PMFY-P06NBMU-E PMFY-P08NBMU-E
PMFY-P06NBMU-E1 PMFY-P08NBMU-E1

PMFY-P12NBMU-E
PMFY-P12NBMU-E1

Parts name

PMFY-P15NBMU-E
PMFY-P15NBMU-E1

Check points

Thermistor (TH21)

Thermistor (TH22)


Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 50°F~86°F)
Normal

Abnormal

4.3k"~9.6k"

Open or short

Refer to the next page for the details.

Thermistor (TH23)


Vane motor (MV)
Yellow 2

Connector
MV

Brown — Red
1

3

Green Orange

Linear expansion
valve (LEV)

5

Abnormal

Brown — Orange

380" i7%

Open or short

Brown — Green
Disconnect the connector then measure the resistance with a tester.

Blue

4

1

Normal

Brown — Yellow

Red 4
Brown 5

M

Measure the resistance between the terminals with a tester.
(At the ambient temperature 68°F~86°F)

Normal

6

Brown

2
3

Yellow

White-Red

Abnormal

Yellow-Brown Orange-Red

Blue-Brown

150k" i10%

Open or short

Refer to the next
page for the details.

Orange
Red
White

Drain pump (DP)

Measure the resistance between the terminals with a tester.
(At the ambient temperature 68°F)

Blue

1

Normal

Abnormal

2

400"~480"

Open or short

Blue

Drain sensor (DS)
1
2
3

Measure the resistance after 3 minutes have passed since the power supply was turned off.
(At the ambient temperature 32°F~140°F
Normal

Abnormal

0.6k"~6.0k"

Open or short

20

Refer to the next page for the details.

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Page 21



< Thermistor for lower temperature >
50

Thermistor  (TH21)
Thermistor for
lower temperature Thermistor  (TH22)
Thermistor  (TH23)
Resistance (k")

Thermistor R0=15k' ± 3%
Fixed number of B=3480K ± 2%
Rt=15exp { 3480(
30_F
50_F
70_F
80_F
90_F
100_F

1
273+(t-32)/1.8

40

1
)}
273

15.8k'
9.6k'
6.0k'
4.8k'
3.9k'
3.2k'

30

20

10

0
-20

0

20

40

60

80

100

120

Temperature (°F)

Thermistor for
drain sensor

Drain sensor (DS)

10

< Thermistor for drain sensor >

9
8

Rt=6exp { 3390(
30_F
50_F
70_F
80_F
90_F
100_F
140_F

1
273+(t-32)/1.8

Resistance (k")

Thermistor R0=6.0k' ±5%
Fixed number of B=3390K ±2%
1 )}
273

6.3k'
3.9k'
2.5k'
2.0k'
1.6k'
1.3k'
0.6k'

7
6
5
4
3
2
1
0
20

40

60

80

100

120

140 170

Temperature (°F)

Linear expansion valve
1 Operation summary of the linear expansion valve
• Linear expansion valves open/close through the use of a stepping motor after receiving the pulse signal from the indoor
controller board.
• Valve position can be changed in proportion to the number of pulse signals.

Controller board
DC12V
Brown

6

Red

5

[4

Blue

4

[4

[3

Orange

3

[3

[2

Yellow

2

[2

[1

White

1

[1

Linear expansion valve
4
M

6

5

2

1
White Red

3
Orange

Blue
Brown
Yellow

Drive circuit

Connector (CN60)

Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color of
the lead wire.

21

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07.7.11 1:29 PM

Page 22


Output
(Phase)

Output

1

2

3

4

{1

ON

OFF

OFF

ON

{2

ON

ON

OFF

OFF

{3

OFF

ON

ON

OFF

{4

OFF

OFF

ON

ON

2 Linear expansion valve operation
C

D

Closing a valve : 1 → 2 → 3 → 4 → 1
Opening a valve : 4 → 3 → 2 → 1 → 4
The output pulse shifts in above order.
• When linear expansion valve operation stops, all output phase
become OFF.
• At phase interruption or when phase does not shift in order, motor
does not rotate smoothly and motor will lock and vibrate.
• When the switch is turned on, 2200 pulse closing valve signal will be
send till it goes to point A in order to define the valve position.

Valve position (capacity)

• When the valve moves smoothly, there is no sound or vibration
occurring from the linear expansion valves : however, when the
pulse number moves from E to A or when the valve is locked, more
sound can be heard than in a normal situation.
Close

Open
2000 pulse
Opening a valve
all the way

A
E

• Sound can be detected by placing the ear against the screw driver
handle while putting the screw driver tip to the linear expansion
valve.

Pulse number

B

Extra tightening (80~100pulse)

3 Trouble shooting

Symptom

Check points

Countermeasures

Operation circuit fail- Disconnect the connector on the controller board, then con6
ure of the micro
nect LED for checking.
5
processor
4
3
2
1
1k" LED
When power is turned on, pulse signals will send for 10
seconds. If the LED does not light or keeps lighting even
after the signals stop, that means some failures in the
operation circuit.

Exchange the indoor controller board at drive circuit
failure.

Linear expansion
valve mechanism is
locked.

Exchange the linear
expansion valve.

Motor will idle and make a ticking noise when the motor is
operated while the linear expansion valve is locked. This
ticking sound is the sign of the abnormality.

Short or breakage of Measure the resistance between each coil (white-red, yellow- Exchange the linear
the motor coil of the brown, orange-red, blue-brown) with a tester. It is normal if
expansion valve.
linear expansion
the resistance is in the range of 150Ω ±10%.
valve
Valve doesn't close
completely.

To check the linear expansion valve, operate the indoor unit If large amount of refrigerin fan mode and at the same time operate other indoor units ant is leaked, exchange
in cooling mode, then check the pipe temperature  of the indoor unit by the
outdoor multi controller board operation
monitor. During fan operation, linear
expansion valve is closed completely and if
Thermistor
(Liquid pipe) there is any leaking, detecting temperature
of the thermistor will go lower. If the detectLinear
expansion
ed temperature is much lower than the temvalve
perature indicated in the remote controller,
it means the valve is not closed all the way. It is not necessary to exchange the linear expansion valve, if the leakage is
small and not affecting normal operation.

Wrong connection of Check the color of lead wire and missing terminal of the con- Disconnect the connector
the connector or
nector.
at the controller board,
contact failure
then check the continuity.

22

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07.7.11 1:29 PM

Page 23

9-2. TROUBLESHOOTING
Check method of indoor fan motor (fan motor / controller board)
1 Notes
· High voltage is applied to the connecter (FAN) for the fan motor. Give attention to the service.
· Do not pull out the connector (FAN) for the motor with the power supply on, doing so may result in damage to the board.
2 Self check
Conditions : The indoor fan does not rotate.
Turn OFF the power supply.
Wiring contact check
Contact of fan motor connector (FAN)
Contact of power supply cable.

Was contact good?

No

Correct wiring connection.

Yes
Fan motor check
Measure the resistance between the fan motor connecter 1(+) and 3(–).
(With the connector pulled out from the board)

No

Is the resistance 1M" or more?

Replace the fan motor.

Yes
Turn ON the power supply.
Power supply check
Check the voltage of the indoor controller board with the connector (FAN) connected to the board.
Approx. 294~325V DC between the connecter (FAN) 1(+) and 3(–)

Is the voltage normal?

No

Yes

Indoor controller board fuse check
Turn off the power supply and check if there is
any broken wire by using a tester.

Is the fuse normal?

No

Yes

Replace the indoor controller board.

Fan motor position sensor signal check
Rotate the fan motor more than one turn slowly and check the voltage between
the connector (FAN) 6(+) and 3(–) with the connector (FAN) connected to the board.

Does the voltage repeat 0V DC and 15V DC ?

No

Yes

Replace the indoor controller board.

23

Replace the fan motor.

Replace the fuse.

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Page 24

9-3. FUNCTION OF DIP SWITCH
Operation by switch
Switch Pole

Function
ON

SW1
Function
setting

1

Thermistor  position

Built-in remote controller

Indoor unit

2

Filter clogging detection

Provided

Not provided

3

Filter cleaning sign

2,500h

100h

4

Fresh air intake
Switching remote
controller display

Effective
Indicating if the
thermo is ON

Not effective
Indicating fan operation
ON/OFF

5

Effective
timing

Remarks
Address board

ON
OFF
1 2 3 4 5 6 7 8 9 10

Under
suspension

6

Humidifier control

Fan operation at Heating mode

Thermo ON operation at
Heating mode

7

Air flow at

Low w

Extra low w

OFF

OFF

Extra low

8

Heat thermo OFF

Setting air flow

Depends on SW1-7

ON

OFF

Low

Not effective

OFF

ON

Setting air flow

ON

ON

stop

9
10

Auto restart function

Effective

Power ON/OFF by breaker
MODELS

SW 2
ON

MODELS

Indoor controller board

SW 2
ON

1 2 3 4 5 6

PMFY-P08NBMU-E

SW 1-7 SW 1-8 SW 1-8

PMFY-P12NBMU-E OFF

ON
OFF

w

Not effective

Effective

PMFY-P06NBMU-E OFF

SW2
Capacity
1~6
code
setting

1 2 3 4 5 6

PMFY-P15NBMU-E
1 2 3 4 5 6

SW3
Function
setting

OFF

ON
OFF

Before
power
supply
ON


Set for each capacity.

1 2 3 4 5 6

1

Heat pump / Cool only

Cooling only

Heat pump

2

Louver

Available

Not available

3

Vane

Available

Not available

Indoor controller board

4

Vane swing function

Available

Not available

5

Vane horizontal angle

Second setting w6

First setting

6

Vane cooling limit angle setting w4 Horizontal angle

Down B, C

7

Changing the opening of linear
expansion valve when the
thermostat is OFF

Effective

Not effective

8

Heating 4deg. up

Not effective

Effective

9

Target superheat setting w5

—

—

10

Target sub cool setting w5

—

—


ON
OFF
1 2 3 4 5 6 7 8 9 10

( w4 ) At cooling mode, each
angle can be used only
1 hour.

Under
suspension

( w5 ) SW 3-9 setting
PMFY-P06, P08NBMU-E=ON
PMFY-P12, P15NBMU-E=OFF
SW 3-10 setting
PMFY-P06, P08NBMU-E=ON
PMFY-P12, P15NBMU-E=OFF
Do not use SW3-9, 10 as trouble
might be caused by the usage
condition.

w6 Second setting
means first setting.

In case replacing the indoor controller board, make sure to set the switch to the
SW4
initial setting, which is shown below.
Model
Selection
PMFY-P·NBMU-E
PMFY-P·NBMU-E1
(Setting 1~5
ON
ON
for
PMFY
OFF
OFF
series)
1 2 3 4 5
1 2 3 4 5

24

Indoor controller board
Before
power
supply
ON

07.7.11 1:29 PM

Page 25

Switch Pole

Effective
timing

Remarks

90 1

78

SW11

90 1

23

45 6

45 6

1

SW12
23

10



Address setting should be done when M-NET
remote controller is being used.

78

78

90 1

78

SW11

90 1

45 6

SW12

23

Rotary switch

Address board

23

SW11
1st digit
address
setting
SW12
2nd digit
address
setting

Operation by switch

45 6

OC341B--1.qxp


SW14
F01

45 6

Before
power
supply
ON

23

This is the switch to be used when the indoor
unit is operated with R2 series outdoor unit
as a set.

CDE
AB

45 6

CDE
AB

F01

789

SW14
23

789

SW14
Connection
No.
setting

Rotary switch

Address board

Address board
SW5
Voltage
Selection

220V
(208V)

2

240V
(230V) If the unit is used at the 230V area,

set the voltage to 230V.
If the unit is used at the 208V, set the voltage
to 208V.

25


220V
240V
(208V)
(230V)

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Page 26

9-4. TEST POINT DIAGRAM
PMFY-P06NBMU-E PMFY-P08NBMU-E
PMFY-P06NBMU-E1 PMFY-P08NBMU-E1

SW2
Capacity setting

SW3
Function setting

PMFY-P12NBMU-E
PMFY-P12NBMU-E1

CN32
Connector
(Remote switch)

PMFY-P15NBMU-E
PMFY-P15NBMU-E1

SW4
Model selection

CN27
Connector
(Damper)
CNP
Drain pump output
(DP)
Between 1 to 3
208-230V AC

CN25
Connecter
(Humidifier)

CND
Connect to the
terminal block (TB2)
(Power supply for
indoor controller
board connecting
wire)
Between 1 to 3
208-230V AC

CN6V
Vane motor output
(MV)

CN52
Remote indication

FUSE
6.3A 250V

CN51
Centrally control

FAN
Fan motor output
(MF)

CN41
HA terminal-A
CN60
Linear expansion
valve output (LEV)

CN20
Room temperature
thermistor (TH21)
CN21
Pipe temperature
thermistor/Liquid
(TH22)
CN29
Pipe temperature
thermistor/Gas
(TH23)

CN31
Drain sensor (DS)

LED1
Power supply (I.B)
(Indoor unit :
208-230V)
LED2
Power supply (R.B)

CN3A
Connect to the terminal block (TB15)
(MA-Remote controller connecting wire)
1 (+))
Between 1 to 3 8.7-13V DC (Pin1

26

CN2M
Connect to the terminal block (TB5)
(M-NET transmission connecting wire)
24-30V DC (non-polar)

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10

Page 27

DISASSEMBLY PROCEDURE

PMFY-P06NBMU-E
PMFY-P06NBMU-E1

PMFY-P08NBMU-E
PMFY-P08NBMU-E1

PMFY-P12NBMU-E
PMFY-P12NBMU-E1

PMFY-P15NBMU-E
PMFY-P15NBMU-E1

Be careful when removing heavy parts.

OPERATING PROCEDURE

PHOTOS&ILLUSTRATIONS
Photo 1

1. Removing the intake grille
Opening the air intake grille
(1) Press the PUSH of the air intake grille.(See figure 1)
(2) Put your fingers on both ends of the air intake grille and let
it down after the grille clicks.

Removing the air intake grille
(1) Press the PUSH of air intake grille, and pull down both
ends with your fingers after the grille clicks.
(See figure 1)
(2) Pull out the handle of air intake grille toward you.
(See figure 2)
(3) Unhook the string, which secures air intake grille.
(See figure 3)

Air filter

Figure 1

Figure 2

Figure 3

27

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07.7.11 1:29 PM

Page 28

OPERATING PROCEDURE

PHOTOS&ILLUSTRATIONS
Photo 2

2. Removing the electrical parts box
(1) Remove the panel.
(2) Remove the address board cover.
(3) Remove the electrical parts cover.
(4) Disconnect the connectors of
fan motor, vane motor,
drain pump, room temperature thermistor,
pipe temperature thermistor,
condenser/evaporator temperature thermistor,
and drain sensor on the electrical controller board.
(5) Disconnect the lead wire and earth wire from terminal
block.
(6)Remove the electrical parts box.

Claw in middle
of nozzle

Nozzle

Electrical parts

Drain pan

Photo 3

Electrical parts
cover

Address board
cover

3. Removing the nozzle
Note when the nozzle is removed.

Photo 4
Nozzle

· The insulation material (white) which prevents water
drop is mounted to the side of vane motor. Remove the
insulation material before removing nozzle.
(See figure 4)
·After completing the service, re-mount the insulation
material as before as shown in right figure.
·After service, mount the double layer insulation
without fail.
The hard material side should be faced toward the
nozzle. (See figure 4)
(1) Remove the panel.
(2) Remove the room temperature thermistor.
(3) Unhook the claws in the middle of nozzle and remove the
drain pan. (5 screws) (See photo 2)
(4) Remove the nozzle side of the heat exchanger.(2 screws)
(5) Remove the address board cover.
(6) Remove the electrical parts cover.
(7) Disconnect the connector of vane motor.
(8) Remove the insulation material (white) on the right side of
nozzle.
(9)Remove the nozzle. (6 screws)

Vane motor

Room temperature thermistor

Figure 4
Insulation material
Hard side of insulation

Nozzle

Vane motor

Photo 5

4. Removing the vane motor
(1) Remove the nozzle. Refer to above-mentioned 3
Removing the nozzle.
(2) Remove the vane motor.

Vane motor

28

Heat exchanger

Soft side of insulation

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07.7.11 1:29 PM

Page 29

OPERATING PROCEDURE

PHOTOS&ILLUSTRATIONS

5. Removing the drain pump
(1) Remove the panel.
(2) Unhook the claw in the middle of nozzle and remove the
drain pan.
(3) Remove the address board cover.
(4) Remove the electrical parts cover.
(5) Disconnect the connector of drain pump.
(6) Remove the drain hose.
(7) Remove the drain pump.(2 screws)

Photo 6

Drain sensor

Drain pump

Fan motor

6. Removing the fan motor and line flow fan
(1) Remove the panel.
(2) Unhook the claw in the middle of nozzle and remove the
drain pan.
(3) Unscrew 2 screws at the nozzle side of the heat exchanger.
(4) Remove the address board cover.
(5) Remove the electrical parts cover.
(6) Disconnect the connector of vane motor, fan motor and
drain pump.
(7) Remove the nozzle side of the heat exchanger.(2 screws)
(8) Remove the nozzle.
(9) Remove the drain pump.
(10) Unscrew 2 screws in the motor support.
(11) Remove the fan motor and line flow fan. (The fan motor
and line flow fan can be removed without removing the
heat exchanger.)
7. Removing the thermistor
(1) Remove the panel.
(2) Remove the address board cover.
(3) Remove the electrical parts cover.
(4) Remove the thermistor. 
(5) Disconnect the lead wire from the cord clamp. (5 points)
(6) Disconnect the connector (CN20) on the indoor controller
board.
8. Removing the thermistor


(1) Remove the panel.
(2) Remove the address board cover.
(3) Remove the electrical parts cover.
(4) Remove the drain pan.
(5) Remove the thermistor 
/.
(6) Disconnect the lead wire from the cord clamp.
(7) Disconnect the connector (CN21)/(CN29) on the indoor
controller board.

29

Photo 7

Line flow fan

Fan motor

OC341B--1.qxp

11

07.7.11 1:29 PM

Page 30

PARTS LIST (non-RoHS compliant)

PANEL PARTS FOR
PMFY-P06NBMU-E PMFY-P08NBMU-E PMFY-P12NBMU-E PMFY-P15NBMU-E
PMP-16BMU
10

11

10

2

3

1

4
2

3

9

4
5
8
6

7

Q'ty/set
Part No.

No.

Part Name

Specification
PMP-16BMU
1

1

T7W E11 003 AIR OUTLET GRILLE

2

R01

E00

055 LATCH

2

3

R01

E00

099 PANEL HOOK

2

4

R01

E01

054 GRILLE CATCH

2

5

R01

E01

500 L.L.FILTER

1

6

R01

E02

500 L.L.FILTER

1

7

TW7 E01 691 INTAKE GRILLE

1

8

R01

E00

054 GRILLE CATCH

2

9

R01

E00

648 RECEIVER COVER

1

10 R01

E00

044 MAGNET

2

11 R01

E00

096 SCREW CAP

1

30

Remarks
(Drawing No.)

Wiring RecomDiagram mended
Symbol
Q'ty

OC341B--2.qxp

07.7.11 1:30 PM

Page 31

FUNCTIONAL PARTS
PMFY-P06NBMU-E
PMFY-P08NBMU-E
PMFY-P12NBMU-E
PMFY-P15NBMU-E

22

21
20

1

19

2
3

17

16
15
14

4
5

13
12

6

11
10

7

9

8

10

18

Part number that is circled is not shown in the figure.
Q'ty/set
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

Part No.
R01 22A
R01 005
R01 E02
R01 E00
R01 E00
T7W K08
T7W K09
R01 E10
R01 E00
R01 E00
R01 E01
R01 E03
R01 E66
R01 E01
R01 E01
R01 E00
R01 31K
R01 E01
T7W E07
R01 E00
R01 E14
R01 E07
R01 E00
R01 E01

Part Name
102
103
114
079
092
480
480
529
202
038
202
202
401
002
223
110
241
266
355
130
220
105
527
673

Specification

BEARING MOUNT
SLEEVE BEARING
LINE FLOW FAN
STABILIZER ASSY
VANE SLEEVE
HEAT EXCHANGER
HEAT EXCHANGER
DRAIN PAN ASSY
THERMISTOR
ROOM
GUIDE VANE
THERMISTOR
LIQUID
THERMISTOR
GAS
LINEAR EXPANSION VALVE
VANE
VANE MOTOR
CASING ASSY
SENSOR HOLDER
DRAIN SENSOR
DRAIN PUMP
MOTOR SUPPORT
FAN MOTOR
RUBBER MOUNT
DRAIN PIPE ASSY
SCREW ASSY

31

PMFY-P · NBMU-E

06/ 08
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

12/ 15
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Remarks
(Drawing No.)

Wiring
RecomDiagram mended
Symbol
Q'ty

TH21
TH22
TH23
LEV
MV

DS
DP
MF

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07.7.11 1:30 PM

Page 32

ELECTRICAL PARTS
PMFY-P06NBMU-E PMFY-P08NBMU-E

PMFY-P12NBMU-E

PMFY-P15NBMU-E

RG79L094H01

6

CN60

FAN

1
2

CN6V

CNP

3

4
5

Q'ty/set
No.

Part No.

1 T7W

E11

Part Name

Specification

PMFY-P
06/08/12/15
NBMU-E

716 TERMINAL BLOCK

3P (L1,L2,G)

1

Remarks
(Drawing No.)

Wiring RecomDiagram mended
Symbol
Q'ty

TB2

2 T7W

E17

716 TERMINAL BLOCK

3P (M1,M2,S)

1

TB5

3 R01

556

246 TERMINAL BLOCK

2P(1,2)

1

TB15
A.B

4 T7W

E00

294 ADDRESS BOARD

1

5 R01

E00

304 CABLE ASSY

1

6 T7W

E43

310 INDOOR CONTROLLER BOARD with POWER BOARD

1

32

I.B

OC341B--2.qxp

07.7.11 1:30 PM

12

Page 33

RoHS PARTS LIST

PANEL PARTS FOR
PMFY-P06NBMU-E PMFY-P08NBMU-E
PMFY-P06NBMU-E1 PMFY-P08NBMU-E1
PMP-16BMU
10

PMFY-P12NBMU-E
PMFY-P12NBMU-E1

11

10

PMFY-P15NBMU-E
PMFY-P15NBMU-E1

2

1

3
4

2

3

9

4
5
8
6

No.

RoHS

7

Q'ty/set
Part No.

Part Name

Specification
PMP-16BMU

1

G T7W E16 003 AIR OUTLET GRILLE

1

2

G R01

E01

055 LATCH

2

3

G R01

E01

099 PANEL HOOK

2

4

G R01

E07

054 GRILLE CATCH

2

5

G R01

E14

500 L.L.FILTER

1

6

G R01

E15

500 L.L.FILTER

1

7

G T7W E04 691 INTAKE GRILLE

1

8

G R01

E06

054 GRILLE CATCH

2

9

G R01

E01

648 RECEIVER COVER

1

10 G R01

E01

044 MAGNET

2

11 G R01

E04

096 SCREW CAP

1

33

Remarks
(Drawing No.)

Wiring RecomDiagram mended
Symbol
Q'ty

OC341B--2.qxp

07.7.11 1:30 PM

FUNCTIONAL PARTS
PMFY-P06NBMU-E
PMFY-P08NBMU-E
PMFY-P12NBMU-E
PMFY-P15NBMU-E
PMFY-P06NBMU-E1
PMFY-P08NBMU-E1
PMFY-P12NBMU-E1
PMFY-P15NBMU-E1

Page 34

22

21
1

20

2

19

17

16

18

15
14
13

3
4
5

12

6
11
7

10

8

9

No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

RoHS

Part number that is circled is not shown in the figure.

G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G

Part No.
R01
R01
R01
R01
R01
T7W
T7W
R01
R01
R01
R01
R01
R01
R01
R01
R01
R01
R01
T7W
R01
R01
R01
R01
R01
R01

23A
E04
E32
E01
E02
H08
H09
E30
H12
E03
H16
H17
H06
E16
E18
E05
32K
E11
E11
E35
E24
E45
E13
E05
E03

Part Name
102
103
114
079
092
480
480
529
202
038
202
202
401
002
223
110
241
266
355
130
220
220
105
527
673

Specification

BEARING MOUNT
SLEEVE BEARING
LINE FLOW FAN
STABILIZER ASSY
VANE SLEEVE
HEAT EXCHANGER
HEAT EXCHANGER
DRAIN PAN ASSY
THERMISTOR
ROOM
GUIDE VANE
THERMISTOR
LIQUID
THERMISTOR
GAS
LINEAR EXPANSION VALVE
VANE
VANE MOTOR
CASING ASSY
SENSOR HOLDER
DRAIN SENSOR
DRAIN PUMP
MOTOR SUPPORT
FAN MOTOR
FAN MOTOR
RUBBER MOUNT
DRAIN PIPE ASSY
SCREW ASSY

Q'ty/set
Wiring RecomPMFYRemarks
Diagram mended
P·NBMU-E P·NBMU-E1 (Drawing No.) Symbol
Q'ty
06/08 12/15 06/08 12/15

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

34

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

1
1
1
1

1
1
1
1

TH21
TH22
TH23
LEV
MV

DS
DP
MF
MF

OC341B--2.qxp

07.7.11 1:30 PM

Page 35

ELECTRICAL PARTS
PMFY-P06NBMU-E
PMFY-P06NBMU-E1

PMFY-P08NBMU-E PMFY-P12NBMU-E
PMFY-P08NBMU-E1 PMFY-P12NBMU-E1

PMFY-P15NBMU-E
PMFY-P15NBMU-E1

RG79L094H01

7
6
CN60

FAN

1
2
CN6V

CNP

3

No.

RoHS

4

5

Q'ty/set
Part No.

Part Name

Specification

PMFY-P06/08/12/15
NBMU-E NBMU-E1

Remarks
(Drawing No.)

Wiring RecomDiagram mended
Symbol
Q'ty

1

G T7W E41 716 TERMINAL BLOCK

3P (L1,L2,G)

1

1

TB2

2

G R01

E27

246 TERMINAL BLOCK

3P (M1,M2,S)

1

1

TB5

3

G R01

E21

246 TERMINAL BLOCK

2P(1,2)

1

1

TB15

4

G T7W E01 294 ADDRESS BOARD

1

1

A.B

5

G R01

1

1

6

G T7W 420 239 FUSE

1

1

7

E07

304 CABLE ASSY
250V, 6A

G T7W E59 310 INDOOR CONTROLLER BOARD

I.B

1

G T7W E67 310 INDOOR CONTROLLER BOARD

1

35

FUSE
I.B

OC341B--2.qxp

07.7.11 1:30 PM

Page 36

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN
cCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Jul. 2007. No. OC341 REVISED EDITION-B PDF 9
Distributed in Aug. 2006. No. OC341 REVISED EDITION-A PDF 9
Distributed in Jun. 2005. No. OC341 PDF 10
Made in Japan

New publication, effective Jul. 2007
Specifications subject to change without notice



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