Mitsubishi Electronics PCFY-P15NKMU-E, PCFY-P24NKMU-E, PCFY-P36NKMU-E, PCFY-P30NKMU-E User Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

Indoor unit
[Model names] [Service Ref.]

PCFY-P15NKMU-E

PCFY-P24NKMU-E

PCFY-P30NKMU-E

PCFY-P15NKMU-E
PCFY-P24NKMU-E
PCFY-P30NKMU-E

February 2009

No. OCH450

R22R410A

Note:

• This manual describes only

service data of the indoor
units.

• RoHS compliant products

have <G> mark on the spec
name plate.

PCFY-P36NKMU-E

PCFY-P36NKMU-E

CONTENTS

1. PART NAMES AND FUNCTIONS

2. SPECIFICATION

3. OUTLINES AND DIMENSIONS

4. WIRING DIAGRAM

5. REFRIGERANT SYSTEM DIAGRAM

6. MICROPROCESSOR CONTROL

7. TROUBLESHOOTING

8. DISASSEMBLY PROCEDURE

PARTS CATALOG (OCB450)

..........

.....................................

..............

...............................

........

...............

..........................

.............

2
4

8
11
12
13
20
29

INDOOR UNIT

Model name
indication

1

PART NAMES AND FUNCTIONS

Indoor unit

Vane

Air outlet

Louver

Air intake

Filter
(Inside of Air intake)

2

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.

Identifies the current operation

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

“Centrally Controlled” indicator

Indicates that operation from the
remote controller has been prohib­ited by a master controller.

“Timer is Off” indicator

Indicates that the timer is off.

Temperature Setting

Shows the target temperature.

Operation Section

Day-of-Week

Shows the current day of the week.

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.

TIME SUN MON TUE WED THU FRI SAT
TIMER

AFTER

ERROR CODE

°F°C

Hr

AFTER

°F°C

ONLY1Hr.

Up/Down Air Direction indica­tor

The indicator shows the direc­tion of the outcoming airflow.

“One Hour Only” indicator

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,
at which time the airflow direction
also changes.

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.

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.

ON

OFF

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

“Sensor” indication

Displayed when the remote controller
sensor is used.

“Locked” indicator

Indicates that remote controller but­tons have been locked.

“Clean The Filter” indicator

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

Timer indicators

The indicator comes on if the corre­sponding timer is set.

Fan Speed indicator

Shows the selected fan speed.

Ventilation indicator

Appears when the unit is running in
Ventilation mode.

Temperature setting buttons

Down

Up

Timer Menu button
(Monitor/Set button)

Mode button (Return button)

Set Time buttons

Back

Ahead

Timer On/Off button
(Set Day button)

Opening the
lid

Note:

●

“PLEASE WAIT” message

TEMP.

MENU

BACK DAY

MONITOR/SET

PAR-21MAA

CLOCK

ON/OFF

ON/OFF

FILTER

CHECK

OPERATION

Built-in temperature sensor

CLEAR

TEST

ON/OFF button

Fan Speed button

Filter button
(<Enter> button)

Test Run button

Check button (Clear button)

Airflow Up/Down button

Louver button
( Operation button)

To return operation
number

Ventilation button
( Operation button)

To go to next operation
number

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.

3

2

SPECIFICATION

2-1. SPECIFICATIONS

Model PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E
Power source 1-phase 208/230V 60Hz

Cooling capacity *1
(

)

Nominal

Power input
Current input

Heating capacity
(

)

Nominal

Power input
Current input

External finish MUNSELL (6.4Y 8.9/0.4

External dimensions H x W x D mm 230×960×680 230×1280×680 230×1600×680

Net weight kg (lb)
Heat exchanger Cross fin (Aluminum fin and copper tube

FAN

Type x quantity Sirocco fan × 2 Sirocco fan × 3 Sirocco fan × 4

External Pa 0

static press.

Motor type DC motor
Motor output kW

Driving mechanism Direct-driven by motor

Airflow rate

(

Low-Mid2-Mid1-High

Noise level (Low-Mid2-Mid1-High

(

measured in anechoic room

Insulation material Polyeter sheet
Air filter PP honeycomb

Protection device

Refrigerant control device LEV

Connectable outdoor unit R410A, R22 CITY MULTI
Diameter of Liquid
refrigerant pipe

Gas

Field drain pipe size mm(in.

Standard
attachment

Optional parts

Document

Accessory

Drain pump kit
High efficiency filter
External heater adapter
i-see Sensor
Wireless remote controller with i-see Sensor

Wireless remote controller kit

Remarks

Installation

kW 4.4 7.0 8.8 10.6

*1

Btu/h 15,000 24,000 30,000 36,000
kW 0.03 0.04 0.09 0.11
A 0.35 0.41 0.83 0.97

*2

kW 5.0 7.9 10.0 11.7

*2

Btu/h 17,000 27,000 34,000 40,000
kW 0.03 0.04 0.09 0.11
A 0.35 0.41 0.83 0.97

in. 9-1/16×37-13/16×26-3/4 9-1/16×50-3/8×26-3/4 9-1/16×63×26-3/4

24 (53

)

32 (71

)

)

36 (79

)

)

mmH2O0

0.090

3

m

/min

)

L/s 167-183-200-217 233-250-267-300 333-367-417-467 350-400-450-517
cfm

)

dB <A>

10-11-12-13 14-15-16-18 20-22-25-28 21-24-27-31

353-388-424-459 494-530-565-636 703-777-883-989 742-847-953-1095

29-32-34-36

)

(

)

R410A

(

R22

(

R410A

(

R22

mm(in.

)

)

mm(in.

)

)

ø6.35 (ø1/4) Flare ø9.52 (ø3/8) Flare ø9.52 (ø3/8) Flare ø9.52 (ø3/8) Flare
ø6.35 (ø1/4) Flare ø9.52 (ø3/8) Flare ø9.52 (ø3/8) Flare ø9.52 (ø3/8) Flare

)

ø12.7 (ø1/2) Flare ø15.88 (ø5/8) Flare ø15.88 (ø5/8) Flare ø15.88 (ø5/8) Flare
ø12.7 (ø1/2) Flare ø15.88 (ø5/8) Flare ø15.88 (ø5/8) Flare ø19.05 (ø3/4) Flare

)

0.095 0.160

31-33-35-37 34-37-40-43 36-39-42-44

Fuse

O.D. 26mm (1

)

Installation Manual, Instruction Book

Drain joint socket

PAC-SH83DM-E PAC-SH84DM-E

PAC-SH88KF-E PAC-SH89KF-E

PAC-SH90KF-E

PAC-YU25HT

PAC-SH91MK-E

PAR-SA92MW-E

PAR-SL93B-E

Details on foundation work, insulation work, electrical wiring, power source switch, and other items shall be referred to the
Installation Manual.

38 (84

)

*

3

Note :

Pipe length :

Level difference :

* Due to continuing improvement, above specification may be subject to change without notice.

*1 Nominal cooling conditions

Indoor :

Outdoor :

80°FDB/67°FWB (26.7°CDB/19.4°CWB)
95°FDB (
25 ft. (7.6 m)
0 ft (

0 m)

35°CDB)

*2 Nominal heating conditions

70°FDB(21°CDB)
47°FDB/43°FWB (8.3°CDB/6.1°CWB)
25 ft. (7.6 m)
0 ft (0 m)

*3 Connect the joint
(purchased locally) for R22

Unit converter

kcal/h = kW
Btu/h = kW × 3,412
cfm = m
lb = kg/0.4536

*Above specification data is
subject to rounding variation.

× 860

3

/min × 35.31

4

2-2. ELECTRICAL PARTS SPECIFICATIONS

Service Ref.

Parts name

Room temperature
thermistor

Liquid pipe thermistor

Gas pipe thermistor

Fuse
(Indoor controller board)

Fan motor

Vane motor

Drain-pump
(Option)

Drain float switch

Linear expansion valve

Power supply terminal
block

Symbol

TH21

TH22

TH23

FUSE

MF

MV

DP

FS

LEV

TB2

PCFY-P24NKMU-EPCFY-P15NKMU-E

PCFY-P30NKMU-E
PCFY-P36NKMU-E

Resistance 30°F/15.8kΩ, 50°F/9.6kΩ, 70°F/6.0kΩ, 80°F/4.8kΩ, 90°F/3.9kΩ, 100°F/3.2kΩ

Resistance 30°F/15.8kΩ, 50°F/9.6kΩ, 70°F/6.0kΩ, 80°F/4.8kΩ, 90°F/3.9kΩ, 100°F/3.2kΩ

Resistance 30°F/15.8kΩ, 50°F/9.6kΩ, 70°F/6.0kΩ, 80°F/4.8kΩ, 90°F/3.9kΩ, 100°F/3.2kΩ

250V 6.3A

8-pole OUTPUT 90W 8-pole OUTPUT 95W

8-pole OUTPUT 160W

MSBPC20

DC12V 300Ω/phase

INPUT 10.8W 24 /Hr

Open / Short detection DC 5V

DC12V Stepping motor drive
Port dimension ø3.2 (0~2000pulse)
EFM-40YGME

DC12V Stepping motor drive
Port dimension ø5.2 (0~2000pulse)
EFM-80YGME

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

Transmission terminal
block

MA remote controller
terminal block

2-3. SOUND LEVEL

PCFY-P•NKMU-E

3.3ft
(1m)

Measurement

location

* Measured in anechoic room.

3.3ft
(1m)

TB5

TB15

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

(1, 2) Rated to 250V 10A

Note : Refer to WIRING DIAGRAM for the supplied voltage.

Sound level at anechoic room : Low-

Service Ref.

PCFY-P15NKMU-E

PCFY-P24NKMU-E 31-33-35-37

PCFY-P30NKMU-E 34-37-40-43

PCFY-P36NKMU-E 36-39-42-44

Sound level dB (A)

29-32-34-36

Mid2-Mid1-High

5

A

A

2-4. NC CURVES

PCFY-P15NKMU-E

External static pressure : 0Pa
Power source :

70.0

65.0

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

Approximate minimum

20.0

audible limit on
continuous noise

15.0

Octave band pressure level (dB) 0dB=20μPa

10.0
63 125 250 500 1k 2k 4k 8k

208V, 230V, 60Hz

High
Middle1

Octave band center frequencies (Hz)

Middle2
Low

NC-60

NC-50

NC-40

NC-30

NC-20

PCFY-P24NKMU-E

External static pressure : 0Pa
Power source :

70.0

65.0

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

pproximate minimum

20.0

audible limit on
continuous noise

15.0

Octave band pressure level (dB) 0dB=20μPa

10.0
63 125 250 500 1k 2k 4k 8k

208V, 230V, 60Hz

High
Middle1

Octave band center frequencies (Hz)

Middle2
Low

NC-60

NC-50

NC-40

NC-30

NC-20

PCFY-P30NKMU-E

External static pressure : 0Pa
Power source :

70.0

65.0

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

Approximate minimum

20.0

audible limit on
continuous noise

15.0

Octave band pressure level (dB) 0dB=20μPa

10.0
63 125 250 500 1k 2k 4k 8k

208V, 230V, 60Hz

High
Middle1

Octave band center frequencies (Hz)

Middle2
Low

NC-60

NC-50

NC-40

NC-30

NC-20

PCFY-P36NKMU-E

External static pressure : 0Pa
Power source :

70.0

65.0

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

pproximate minimum

20.0

audible limit on
continuous noise

Octave band pressure level (dB) 0dB=20μPa

15.0

10.0
63 125 250 500 1k 2k 4k 8k

208V, 230V, 60Hz

High
Middle1

Octave band center frequencies (Hz)

Middle2
Low

NC-60

NC-50

NC-40

NC-30

NC-20

6

2-5. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS

■

PCFY-P15NKMU-E

How to read curves

50(20)

0

-50(-20)

-100(-40)

-150(-60)

-200(-80)

-250(-100)

-300(-120)

Static pressure[Pa(in.W.G.×10ˉ²]

■

PCFY-P24NKMU-E

0 1 2 3 4

50(20)

0

-50(-20)

-100(-40)

-150(-60)

-200(-80)

-250(-100)

-300(-120)

Static pressure[Pa(in.W.G.×10ˉ²]

0 1 2 3 4

50 100

Airflow rate

50 100

Airflow rate

[CMM]
[CFM]

[CMM]
[CFM]

1

0

2

3

Q

Qa

Curve in the
graphs

Q

Q

Duct characteristics
at site

A

C

B

A

EC

AD

Q…Designed amount of fresh air intake

A…Static pressure loss of fresh air

intake duct system with airflow
amount Q <Pa(in.W.G.x10-2)>

B…Forced static pressure at air con-

ditioner inlet with airflow amount Q

C…Static pressure of booster fan with

airflow amount Q <Pa(in.W.G.x10-2)>

D…Static pressure loss increase amount

of fresh air intake duct system for
airflow amount Q <Pa(in.W.G.x10-2)>

E…Static pressure of indoor unit with

airflow amount Q <Pa(in.W.G.x10-2)>

Qa…Estimated amount of fresh air

intake without D <CMM(CFM)>

<CMM(CFM)>

<Pa(in.W.G.x10

-2

)>

■

PCFY-P30, 36NKMU-E

50(20)

0

-50(-20)

-100(-40)

-150(-60)

-200(-80)

-250(-100)

-300(-120)

Static pressure[Pa(in.W.G.×10ˉ²]

0 1 2 3 4

50 100

Airflow rate

[CMM]
[CFM]

7

3

OUTLINES AND DIMENSIONS

PCFY-P15NKMU-E

6

6

3-1/8(80)

26-3/4(680)

12-5/8(320)

2(51)

3/8(10)

1/16(2)

3/16(5)

When drain socket

is installed

gas Φ1/2(Φ12.7)

liquid Φ1/4(Φ6.35)

8(203)

9-5/16(236)

7-1/4(184)

9-3/16(233)

14

9/16

In case of wireless

remote controller

and i-see sensor

9-1/16(230)

7-11/16(195)

3-7/16(88)

3-5/16(84)

Drainage

9-11/16(246)

NOTES.

1.Use M10 or W3/8 screw for anchor bolt.

2.Please be sure when installing the

drain lift up mechanism(option parts),

refrigerant pipe will be only upward.

Emergency operation

switch <Heating>

DEFROST/STAND BY lamp

Operation lamp

(Optional Parts)

In case of wireless remote controller

and i-see sensor(Optional Parts)

Emergency operation

switch <Cooling>

3-3/8(85)7-3/16(182)

Receiver

i-see sensor

26-3/4(680)

2-1/4(57)

18-3/4(476)

10(254)

Unit : inch(mm)

1

5

[FRONT VIEW]

5-1/2(140) 2-7/16(62)

36-1/16(917)(Suspension bolt pitch)

4

3-3/8(85)

1/16(2)

3-3/8(86)

10-1/4(260)

120°

3(76)4-7/8(124)

11/16(18)

5-7/8(150)

4-15/16(126)

1/16(1)

Ceiling

3

Electrical box

7-1/2(190)1-13/16(46)

7-1/2(190)

5-7/16(138)

11/16(18)

125)

2-15/16(75)

1-7/16(37)

1-1/2(38)

4-15/16(Φ

Φ

2

4-3/4(121)

15-1/4(387)

18-1/8(461)

33-9/16(853)

37-13/16(960)

1/16(2)

7

1-7/8(48)5/16(8)

Air outlet

Drainage

When drain socket

is installed

9-11/16(246)

9-3/16(233)

8

2

In case of the rear pipe arrangement, make sure to

remove the shaded portions from the independent piece.

Then put the independent piece back in initial

position.(The heat exchanger might be clogged because of dust)

When electrical box

is pulled down

Electrical box

8

34-9/16(878)

Air intake

Drainage pipe connection(1(26mm)I.D.)

Drainage pipe connection(for the left arrangement)

Knock out hole for left drain-piping arrangement

Refrigerant-pipe connection(gas pipe side/flared connection)

Refrigerant-pipe connection(liquid pipe side/flared connection)

Knock out hole for upper drain pipe arrangement

Knock out hole for fresh air intake Φ3-15/16(Φ100)

Knock out hole for wiring arrangement Φ7/8(Φ22)

1

2

1

5

4

3

5

6

6

4

3

2

Accessory...Drain socket (1(26mm) I.D.)

8

7

8

7

PCFY-P24NKMU-E

2-7/16(62)

Unit : inch(mm)

Drainage

liquid Φ3/8(Φ9.52)

gas Φ5/8(Φ15.88)

When drain socket

is installed

9-5/16(236)

7-7/8(200)

9-3/16(233)

9-11/16(246)

7-1/16(180)

Emergency operation

14

9/16

2(51)

3/8(10)

3/16(5)

6

26-3/4(680)

3-1/8(80)

12-5/8(320)

In case of wireless

remote controller

and i-see sensor

9-1/16(230)

7-11/16(195)

3-7/16(88)

3-5/16(84)

(Optional Parts)

3-3/8(85)

switch <Heating>

DEFROST/STAND BY lamp

Operation lamp

Receiver

In case of wireless remote controller

and i-see sensor(Optional Parts)

Emergency operation

switch <Cooling>

2-1/4(57)

i-see sensor

NOTES.

1.Use M10 or W3/8 screw for anchor bolt.

2.Please be sure when installing the drain lift up

mechanism(option parts),refrigerant pipe will be only upward.

26-3/4(680)

18-3/4(476)

10(254)

5-1/2(140)

11/16(18)

5-7/8(150)

48-11/16(1237) (Suspension bolt pitch)

46-3/16(1173)

7-3/16(182)

47-3/16(1198)

Air outlet

4-15/16(126)

1/16(1)

7-1/12(190)

1-7/16(37)

1/16(2) 1/16(2)50-3/8(1280)

Air intake

4

3-3/8(85)

10-1/4(260)

1/16(2)

3-3/8(86)

120°

Ceiling

3(76)

5-7/16(138)

11/16(18)

125)

1-1/2(38)

Φ4-15/16(Φ

4-3/4(121)

4-7/8(124)

15-1/4(387)

7

7

8

8

18-1/8(461)

In case of the rear pipe arrangement, make sure to

remove the shaded portions from the independent piece.

Then put the independent piece back in initial

1-7/8(48)5/16(8)

position.(The heat exchanger might be clogged because of dust)

When drain socket

2

Drainage

is installed

9-11/16(246)

9-3/16(233)

1

5

[FRONT VIEW]

Electrical box

3

7-1/2(190)

2-15/16(75)

2

When electrical box

is pulled down

1-13/16(46)

Electrical box

9

Drainage pipe connection(1(26mm)I.D.)

Drainage pipe connection(for the left arrangement)

Knock out hole for left drain-piping arrangement

Refrigerant-pipe connection(gas pipe side/flared connection)

Refrigerant-pipe connection(liquid pipe side/flared connection)

Knock out hole for upper drain pipe arrangement

Knock out hole for fresh air intake Φ3-15/16(Φ100)

Knock out hole for wiring arrangement Φ7/8(Φ22)

3

214

5

6

Accessory...Drain socket (1(26mm) I.D.)

8

7

PCFY-P30, 36NKMU-E

80

3-1/8

62

2-7/165-1/2

6

26-3/4(680)

12-5/8(320)

2(51)

3/8(10)

1/16(2)

3/16(5)

When drain socket

is installed

gas Φ5/8(Φ15.88)

liquid Φ3/8(Φ9.52)

9-5/16(236)

9-3/16(233)

7-7/8(200)

7-1/16(180)

14

9/16

In case of wireless

remote controller

9-1/16(230)

and i-see sensor

7-11/16(195)

3-7/16(88)

3-5/16(84)

Drainage

9-11/16(246)

Emergency operation

switch <Heating>

DEFROST/STAND BY lamp

Receiver

In case of wireless remote controller

and i-see sensor(Optional Parts)

Emergency operation

switch <Cooling>

(Optional Parts)

57

2-1/4

85

26-3/4(680)

18-3/4(476)

10(254)

Unit : inch(mm)

Operation lamp

Air intake

140

11/16(18)

5-7/8(150)

61-5/16(1557) (Suspension bolt pitch)

NOTES.

1.Use M10 or W3/8 screw for anchor bolt.

2.Please be sure when installing the drain lift up

mechanism (option parts),refrigerant pipe will be only upward.

4-15/16(126)

1/16(1)

4

3-3/8(85)

10-1/4(260)

1/16(2)

3-3/8(86)

°
0

2

1

1

1

5

7-1/2(190)

5-7/16(138)

11/16(18)

)

5

2

1

(Φ

1-7/16(37)

1-1/2(38)

6

/1

5

-1

4

4-3/4(121)

15-1/4(387)

Φ

18-1/8(461)

7

8

Ceiling

3(76)

[FRONT VIEW]

4-7/8(124)

In case of the rear pipe arrangement, make sure to

remove the shaded portions from the independent piece.

Then put the independent piece back in initial

position.(The heat exchanger might be clogged because of dust)

58-3/4(1493)

1/16(2) 63(1600)

Electrical box

1-7/8(48)5/16(8)

Air outlet

Drainage

When drain socket

is installed

9-11/16(246)

9-3/16(233)

2

182

7-3/16 3-3/8

59-3/4(1518)

Knock out hole for upper drain pipe arrangement

Knock out hole for fresh air intake Φ3-15/16(Φ100)

Knock out hole for wiring arrangement Φ7/8(Φ22)

Drainage pipe connection(1(26mm)I.D.)

Drainage pipe connection(for the left arrangement)

Knock out hole for left drain-piping arrangement

Refrigerant-pipe connection

(gas pipe side/flared connection)

Refrigerant-pipe connection

(liquid pipe side/flared connection)

5

4

3

2

11

Accessory...Drain socket (1(26mm)I.D.)

8

7

6

Electrical box

3

7-1/2(190)

When electrical box

2-15/16(75)

2-15/16(75)

2

1-13/16(46)

is pulled down

10

4

WIRING DIAGRAM

PCFY-P15, 24, 30, 36NKMU-E

[LEGEND]

SYMBOL

I. B

LEV
MF
MV

TB2
TB5
TB15
TH21

INDOOR CONTROLLER BOARD

CN24

CONNECTOR
CN27
CN32
CN51
CN52

SURGE ABSORBER

DSA
FUSE

FUSE (T6.3AL250V)
SW2

SWITCH
SW3
SW4
SWE

AUX. RELAY

X1

VARISTOR

ZNR01,02

LINEAR EXPANSION VALVE
FAN MOTOR
VANE MOTOR
I-SEE SENSOR MOTOR(OPTIONAL PARTS)MT
TERMINAL

BLOCK

THERMISTOR

EXTERNAL HEATER
DAMPER
REMOTE SWITCH
CENTRALLY CONTROL
REMOTE INDICATION

CAPACITY CODE
MODE SELECTION
MODEL SELECTION
DRAIN LIFT UP MECHANISM (TEST MODE)
DRAIN LIFT UP MECHANISM (OPTIONAL PARTS)

POWER SUPPLY
TRANSMISSION
MA-REMOTE CONTROLLER
ROOM TEMP. DETECTION
(32°F/15ΚΩ, 77°F/5.4ΚΩ Detect)

SYMBOLNAME

TH22

TH23

A. B

SWA
SWC
SW1
SW11
SW12
SW14

OPTIONAL PARTS

W.B

BZ
LED1
LED2
RU
SW1
SW2

DP

FS

NAME

THERMISTOR

ADDRESS BOARD
SWITCH

PCB FOR WIRELESS REMOTE CONTROLLER
BUZZER
LED (OPERATION INDICATION : GREEN)
LED (PREPARATION FOR HEATING : ORANGE)
RECEVING UNIT
EMERGENCY OPERATION (HEAT / DOWN)
EMERGENCY OPERATION (COOL / UP)

DRAIN LIFT UP MECHANISM
DRAIN FLOAT SWITCH

PIPE TEMP. DETECTION / LIQUID
(32°F/15ΚΩ, 77°F/5.4ΚΩ Detect)

PIPE TEMP. DETECTION / GAS
(32°F/15ΚΩ, 77°F/5.4ΚΩ Detect)

CEILING HEIGHT SELECTOR
OPTION SELECTOR
MODE SELECTION
ADDRESS SETTING 1s DIGIT
ADDRESS SETTING 10ths DIGIT
BRANCH No.

LED on indoor board for service

Mark

LED1

LED2

Meaning Function

Main power supply

Power supply for
MA-Remote controller

Main Power supply (Indoor unit:208-230V)
power on → lamp is lit

Power supply for MA-Remote controller
on → lamp is lit

45

M

I-SEE
SENSOR

MT

I-SEE SENSOR

(OPTIONAL PARTS)

1418

ADDRESS

9

BZ

LED2

LED1

RU

<Fig. w1>

MODELS

P15

P24

P30

P36

4

ON

OFF

12345678910 12345612345

CN42

(RED)

LIQUID/PIPE

CN44
(WHT)

14

When attaching
drain lift up
mechanism

t° t°

(optional parts),
remove the jumper
connector CN4F
and fit the drain
float switch (FS).

SW2 SW3

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

See fig.w1

SW3 SW4

SWE

ONOFF

FLOAT SW

CN4F

(WHT)

14

ON

OFF

12345678910

ON

OFF

12345678910

SW2

When attaching
drain lift up
mechanism
(optional parts)

FLOAT SW

CN4F

(WHT)

ON
OFF

DC294~325V
RECTIFICATION

CN25

CN24

(WHT)

(YLW)

21

INTAKE

CN20
(RED)

14

t°

TH21TH23TH22

FS

BLU
BLU

21

M-NET
CN2M
(BLU)

21

LED1

CN27
(RED)

2121

w

Be sure to turn off the source power
and then disconnect fan motor connector.
(Failure to do so will cause trouble in Fan motor)

A.B

MV

M

5

20

I-SEE SENSOR MOTOR

CN6Y
(RED)

16

I-SEE SENSOR

CN4Y

(WHT)

14

VANE CNV

MA REMOCON

LEV

CN60

(WHT)

16

CN52

(GRN)

6

BLU

YLW

ORN

WHT

M

LEV

OFF

(WHT)

CN3A
(BLU)

13

CN51
(WHT)

1515

RED

BRN

SW1

ON

12345678910

SW12 SW11

9

8

7

10ths
DIGIT

12345678910111213141516171819

SWA

3
2
1

0

0

1

1

9

2

2

8

3

3

7

2

4

4

6

6

5

5

1

1s

DIGIT

CN32
(WHT)

13

LED2

CN41
(WHT)

14

TB15

BLU

1

BLU

2

4

(RED)

ADDRESS

CN43

1

8

(RED)

ADDRESS

SW14

CN82

0

1

SWC

F

2

E

3

4

D

5

C

6

B

7

A

8

9

BRANCH

1

No.

8

J42 J41

Pair No.

ADDRESS

CN81
(RED)

WIRELESS

CN90
(WHT)

19

TO MA-REMOTE
CONTROLLER
DC8.7-13V

CNB

SW1

SW2

W.B

(OPTIONAL PARTS)

NOTES:

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, : connecter.

6.The setting of the SW2 dip switches differs in the capacity. For the detail, refer to fig.w1.

<w2>Use copper supply wires.

TB5

M1
M2

S

(SHIELD)

U

ZNR01

74

TO OUTDOOR UNIT
BC CONTROLLER
REMOTE CONTROLLER
DC24-30V

GRN/YLW

135

CND

(BLK)

DSA

ZNR02

U

FUSE

FAN
CNMF
(WHT)

MS

D.U.M

1

CNP

(BLU)

3~

MF

(OPTIONAL PARTS)

<w2>

RED
BLU

M

1~

DP

TB2

L1
L2

GR

I.B

X1

13

POWER SUPPLY
~208-230V 60Hz

BREAKER
(16A)

FUSE(16A)

PULL BOX

TO NEXT
INDOOR UNIT

11

5 REFRIGERANT SYSTEM DIAGRAM

PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E

Refrigerant flow in cooling
Refrigerant flow in heating

Heat exchanger

Strainer1 (#50 mesh)
Strainer2 (#100 mesh)

Room temparature thermistor TH21

Service Ref.

PCFY-P15NKMU-E

Item

Gas pipe

Liquid pipe

Gas pipe thermistor TH23

Liquid pipe thermistor TH22

Linear expansion valve

ø12.7 (1/2)

ø6.35 (1/4)

Strainer (#100 mesh)

Gas pipe

Flare connection

Liquid pipe

Strainer (#100 mesh)

Unit : mm (inch)

PCFY-P24NKMU-E
PCFY-P30NKMU-E
PCFY-P36NKMU-E

ø15.88 (5/8)

ø9.52 (3/8)

12

MICROPROCESSOR CONTROL6

INDOOR UNIT CONTROL
6-1. COOL OPERATION

TIME SUN MON TUE WED THU FRI SAT
TIMER

AFTER

ûF ûC

ONLY1Hr.

TEMP.

MENU

ON/OFF

MONITOR/SET

BACK DAY

PAR-21MAA

CLOCK

Control modes

1. Thermoregulating
function

<How to operate>

ERROR CODE

ON

OFFHrAFTER

FUNCTION

ûF ûC

FILTER

WEEKLY

SIMPLE

AUTO OFF

ON/OFF

Press POWER ON/OFF button.
Press the operation MODE button to display COOL.
Press the TEMP. button to set the desired temperature.

NOTE: The set temperature changes 2°F when the or button is

pressed one time. Cooling 67 to 87°F

FILTER

CHECK

TEST

OPERATION

CLEAR

Control details

1-1. Thermoregulating function (Function to prevent restarting for 3 minutes)

• Room temperature desired temperature + 2°F

• Room temperature desired temperature

···Thermo ON

···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 thermo 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.

Liquid pipe temp. (TH22) turns 50°F or above.

The condition of the thermo OFF has become complete

by thermoregulating, etc.

The operation modes became mode other than COOL.

The operation stopped.

Remarks

2. Fan

By the remote controller setting (switch of 4 speeds+Auto)

Type

4 speeds + Auto type

[Low], [Med2], [Med1], [High], [Auto]

Fan speed notch

When [Auto] is set, fan speed is changed depending on the value of:

Room temperature - Desired temperature

13

Control modes

gg

Control details

Remarks

3. Drain pump

3-1. Drain pump control

•Drain pump is always ON during the COOL and DRY mode operation.
(Regardless of the thermo ON/OFF)

•When the operation mode has changed from the COOL or DRY to the others
(including Stop), the drain pump will be kept on for 3 minutes, then turns OFF.

Float switch control

• Float switch control judges whether the sensor is in the air or in the water by
turning the float switch ON/OFF.
In the water: Detected that the float switch is ON for 15 seconds.
In the air : Detected that the float switch is OFF for 15 seconds.

Float SW

ON

OFF

15sec. 15sec. 15sec. 1min.30sec. 1min.30sec.

In the water In the air In the water Error

postponement

Drain pump

abnormal

4. Vane

(up/down vane change)

(1) Initial setting: Start at COOL mode and horizontal vane.
(2) Vane position:

Horizontal →Downward A →Downward B →Downward C→Downward D→Swing→Auto

→

(3) Restriction of the downward vane setting

When setting the downward vane A, B, C or D in [Med1], [Med2], [Low] or [Auto] of
the fan speed notch, the vane changes to horizontal position after 1 hour have
passed.

· "ONLY 1 Hr"
appears on the
wired remote
controller.

14

6-2. DRY OPERATION

TIME SUN MON TUE WED THU FRI SAT
TIMER

AFTER

ûF ûC

ONLY1Hr.

TEMP.

MENU

ON/OFF

MONITOR/SET

BACK DAY

PAR-21MAA

CLOCK

Control modes

1. Thermo regulating
function

<How to operate>

ERROR CODE

ON

OFFHrAFTER

FUNCTION

ûF ûC

FILTER

WEEKLY

SIMPLE

AUTO OFF

ON/OFF

Press POWER ON/OFF button.
Press the operation MODE button to display DRY.
Press the TEMP. button to set the desired temperature.

NOTE: The set temperature changes 2°F when the or button is

pressed one time. Dry 67 to 87°F

FILTER

CHECK

TEST

OPERATION

CLEAR

Control details

1-1. Thermo regulating function (Function to prevent restarting for 3 minutes)
Setting the Dry thermo by the thermo regulating signal and the room
temperature (TH21).
Dry thermo ON Room temperature desired temperature + 2°F
Dry thermo OFF Room temperature desired temperature

Room
temperature

Over 64°F

Less than 64°F

3 min. passed since starting operation

Thermo regulating signal

ON

Room temperature (T1)

83°F > T1 79°F

79°F > T1 75°F

75°F > T1

OFF

Unconditional

Dry thermo OFF

T1 83°F

Dry thermo

ON

time (min)

93

7

5

33

3

Remarks

Dry thermo

OFF

time (min)

3

3

10

2. Fan

3. Drain pump

4. Vane
(up/down vane change)

1-2. Freeze prevention control
No control function

Indoor fan operation controlled depending on the compressor conditions.

Dry thermo

ON

OFF

Excluding the following

Room temp. < 64°F

Fan speed notch

[Low]

Stop

[Low]

Note: Remote controller setting is not acceptable.

Same control as COOL operation

Same control as COOL operation

15

6-3. FAN OPERATION

TIME SUN MON TUE WED THU FRI SAT

ûF ûC

TEMP.

MENU

MONITOR/SET

BACK DAY

PAR-21MAA

CLOCK

TIMER

AFTER

ONLY1Hr.

ON/OFF

ERROR CODE

ûF ûC

OPERATION

ON

OFFHrAFTER

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

ON/OFF

FILTER

CHECK

CLEAR

<How to operate>

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

TEST

Control modes

1. Fan

2. Drain pump

Control details

Set by remote controller.

Type

4 speeds + Auto type [Low], [Med2], [Med1], [High], [Auto]

Fan speed notch

When [Auto] is set, fan speed becomes [Low].

2-1. Drain pump control
The drain pump turns ON for the specified amount of time when any of the following
conditions is met:
ON for 3 minutes after the operation mode is switched from COOL or DRY to
another operation mode (FAN).
ON for 6 minutes after the float switch is submerged in the water when the
float swich control judges the sensor is in the water.

2-2. Float switch control

• Float switch control judges whether the sensor is in the air or in the water by
turning the float switch ON/OFF.
In the water : Detected that the float switch is ON for 15 seconds.
In the air : Detected that the float switch is OFF for 15 seconds.

Remarks

· Same control
as COOL
operation

3. Vane
(up/down vane change)

Same as the control performed during the COOL operation, but with no restriction
on the vane's downward blow setting

16

6-4. HEAT OPERATION

TIME SUN MON TUE WED THU FRI SAT

ûF ûC

TEMP.

MENU

BACK DAY

MONITOR/SET

PAR-21MAA

CLOCK

TIMER

AFTER

ONLY1Hr.

ON/OFF

ERROR CODE

ûF ûC

OPERATION

ON

OFFHrAFTER

ON/OFF

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

FILTER

CHECK

CLEAR

TEST

<How to operate>

Press POWER ON/OFF button.
Press the operation MODE button to display HEAT.
Press the TEMP. button to set the desired temperature.

NOTE: The set temperature changes 2°F when the or button is

pressed one time. Heating 63 to 83°F.

<Display in HEAT operation>
[DEFROST]

The [DEFROST] symbol is only displayed during the defrost operation.

[STANDBY]

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

Control modes

1.

Thermoregulating

function

2. Fan

Control details

1-1. Thermoregulating function (Function to prevent restarting for 3 minutes)

•

Room temperature desired temperature -2°F ···Thermo ON

•

Room temperature desired temperature ···Thermo OFF

By the remote controller setting (switch of 4 speeds+Auto)

Type

4 speeds + Auto type

[Low], [Med2], [Med1], [High], [Auto]

Fan speed notch

When [Auto] is set, fan speed is changed depending on the value of:

Desired temperature - Room temperature
Give priority to under-mentioned controlled mode
2-1. Hot adjust mode
2-2. Residual heat exclusion mode
2-3. Thermo OFF mode (When the compressor off by the thermoregulating)
2-4. Cool air prevention mode (Defrosting mode)

2-1. Hot adjust mode
The fan controller becomes the hot adjuster mode for the following conditions.
When starting the HEAT operation

When the thermoregulating function changes from OFF to ON.

When release the HEAT defrosting operation

Hot adjust mode *1

Set fan speed by the remote controller

[Low]

[Extra Low]

Remarks

*1

"STAND BY"
will be displayed
during the hot
adjust mode.

ACB

A: Hot adjust mode starts.
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 B. (Terminating the hot adjust mode)

2-2. Residual heat 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.

To be continued on the next page.

17

· This control is
same for the
model without
auxiliary heater.

From the preceding page

Control modes

2. Fan

3. Drain pump

Control details

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.

3-1. Drain pump control
The drain pump turns ON for the specified amount of time when any of the following
conditions is met:
ON for 3 minutes after the operation mode is switched from COOL or DRY to
another operation mode (FAN).
ON for 6 minutes after the float switch is submerged in the water when the
float swich control judges the sensor is in the water.

3-2. Float switch control

• Float switch control judges whether the sensor is in the air or in the water by
turning the float switch ON/OFF.
In the water: Detected that the float switch is ON for 15 seconds.
In the air : Detected that the float switch is OFF for 15 seconds.

Remarks

· Same control as
COOL operation

4. Vane control
(Up/down vane
change)

(1) Initial setting: OFF → HEAT···[last setting]
When the last setting is [Swing] ··· [Downward D]
When changing the mode from exception of HEAT to HEAT operation

···[Downward D]
(2) Vane position:

Horizontal →Downward A →Downward B →Downward C→Downward D→Swing→Auto

→

(3) Restriction of vane position
The vane is horizontally fixed for the following modes.
(The control by the remote controller is temporally invalidated and control by
the unit.)

•Thermo OFF

•Hot adjust [Extra low] mode

•Heat defrost mode

18

6-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION]

<How to operate>

Press POWER ON/OFF button.
Press the operation MODE button to display AUTO.
Press the TEMP. button to set the desired temperature.

NOTE: The set temperature changes 2°F when the or button is

pressed one time. Automatic 67 to 83°F

ûF ûC

TEMP.

MENU

MONITOR/SET

BACK DAY

PAR-21MAA

TIME SUN MON TUE WED THU FRI SAT
TIMER

AFTER

ERROR CODE

ONLY1Hr.

ON/OFF

CLOCK

ûF ûC

OPERATION

ON

OFFHrAFTER

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

ON/OFF

FILTER

CHECK

CLEAR

TEST

Control modes

1. Initial value of
operation mode

2. Mode change

HEAT mode for room temperature < Desired temperature
COOL mode for room temperature Desired temperature

(1) HEAT mode → COOL mode
Room temperature Desired temperature + 3°F. or 3 min. has passed
(2) COOL mode → HEAT mode
Room temperature Desired temperature - 3°F. or 3 min. has passed

3. COOL mode

4. HEAT mode

Same control as cool operation

Same control as heat operation

6-6. WHEN UNIT IS STOPPED

Control modes

1. Drain pump

1-1. Drain pump control
The drain pump turns ON for the specified amount of time when any of the following
conditions is met:
ON for 3 minutes after the operation mode is switched from COOL or DRY to
another operation mode (FAN).
ON for 6 minutes after the float switch is submerged in the water when the
float swich control judges the sensor is in the water.

Control details

Control details

Remarks

Remarks

1-2. Float switch control

• Float switch control judges whether the sensor is in the air or in the water by
turning the float switch ON/OFF.
In the water : Detected that the float switch is ON for 15 seconds.
In the air : Detected that the float switch is OFF for 15 seconds.

19

· Same control
as COOL
operation

7

TROUBLESHOOTING

7-1. HOW TO CHECK THE PARTS
PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E

Parts name Check points

Room temperature
thermistor (TH21)
Liquid pipe thermistor
(TH22)
Gas pipe thermistor
(TH23)

Disconnect the connector then measure the resistance using a tester.
(At the ambient temperature 50"F~86"F)

Normal

4.3k~9.6k

Abnormal

Open or short

(Refer to the next page for a detail.)

Vane motor (MV)

White

Orange

Red

Blue

Yellow

Drain pump (DP) (Option)

YLW

1

3

YLW

Drain float switch (FS)
(Option)

Moving part

1

2

3

4

i-see sensor
(Option)

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

Connector

Normal

Abnormal
Red - Yellow
Red - Blue
Red - Orange

300

Open or short

Red - White

Measure the resistance between the terminals using a tester.
(Winding temperature 68°F)

Normal Abnormal

290 Open or short

Measure the resistance between the terminals using a tester.

State of moving part Abnormal

UP

DOWN Other than open

Normal

Short Other than short

Open

Turn on the indoor unit with the black plastic tape on the outside of i-see sensor controller board.
i-see sensor rotates then pull out the connector of motor for i-see sensor.
With electricity being turned on, measure the power voltage between connectors with tester.

Switch

Magnet

Moving
Part

4321

43 1

2

Black

Pink

Brown

Blue

Vane motor for
i-see sensor (Option)

White

Orange

Red

Blue

Linear expansion
valve (LEV)

M

White

Red

Orange

Yellow

Blue

Brown

Yellow

Black plastic tape

i-see sensor (At the ambient temperature of 50°F~104°F)

i-see sensor connector

(–)—(+)

(+)—(–) Other than the normal

Normal
DC 1.857V~ 3.132V Other than the normal

DC 0.939V~ 1.506V

NOTE : Be careful of handing such a static electricity.

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

Connector

Normal

Abnormal
Red - Yellow
Red - Blue
Red - Orange

250

Open or short

Red - White

Disconnect the connector then measure the resistance valve using a tester.

Normal

White-Red Yellow-Brown Orange-Red Blue-Brown

200 $10%

20

Abnormal

Abnormal

Open or short

Refer to 7-1-2.

7-1-1. Thermistor

<Thermistor characteristic graph>

Thermistor for
lower temperature

Room temperature thermistor (TH21)
Liquid pipe temperature thermistor (TH22)
Gas pipe temperature thermistor (TH23)

Thermistor R0=15kΩ ± 3%

< Thermistor for lower temperature >

50

40

30

Fixed number of B=3480 ± 2%

Rt=15exp { 3480( ) }

1

273+(t-32)/1.8

1

273

Resistance (kΩ)

20

30°F 15.8kΩ
50°F 9.6kΩ

10

70°F 6.0kΩ
80°F 4.8kΩ
90°F 3.9kΩ
100°F 3.2kΩ

7-1-2.

Operation summary of the linear expansion valve

• Linear expansion valve open/close through 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.
<Connection between the indoor controller board and the linear expansion valve>

Linear expansion valve

0

0-20 20 40 60 80 100 120

Temperature (°F)

Linear expansion valve

4

M

6

2

5

White

1

Red

3

Orange

Blue

Brown

Yellow

Φ4

Φ3

Φ2

Φ1

Brown

Red

Blue

Orange

Yellow

White

Connector(CN60)

Controller board

DC12V

6

5

4

3

2

1

Drive circuit

Φ4

Φ3

Φ2

Φ1

21

<Output pulse signal and the valve operation>

2

OFF

ON
ON

OFF

Output

3
OFF
OFF

ON
ON

D

4

ON
OFF
OFF

ON

C

Output

(Phase)

Φ1

1

ON

Φ2 ON
Φ3 OFF
Φ4 OFF

Linear expansion valve operation

Open

Close

Closing a valve : 1 → 2 → 3 → 4 → 1
Opening a valve : 4 → 3 → 2 → 1 → 4
The output pulse shifts in above order.

Note:

• 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 sent till it goes to point

in order to define the valve position.

• When the valve moves smoothly, there is no sound or vibration
occurring from the linear expansion valves, however, when the
pulse number moves from

to or when the valve is locked,

more sound can be heard than in a normal situation.

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

Valve position (capacity)

A

E

Close

Extra tightening (200~800 pulse)

Trouble shooting

Open

B

Pulse number

Operation circuit
failure of the micro
processor

Linear expansion
valve mechanism is
locked.

Short or breakage
of the motor coil of
the linear expansion
valve

Valve does not close
completely.

Wrong connection
of the connector or
contact failure

Outdoor unit R410A model : 1400 pulse
Outdoor unit R22 model : 2000 pulse
Opening a valve all the way

Symptom

Disconnect the connector on the controller board, then con­nect LED for checking.

When power is turned on, pulse signals will be output for 10
seconds. There must be some defects in the operation circuit
if the LED does not light while the signals are output or keeps
lighting even after the signals stop.

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.

Measure the resistance between each coil (white-red, yellow­brown, orange-red, blue-brown) using a tester. It is normal if
the resistance is in the range of 200Ω ±10%.

To check the linear expansion valve, operate the indoor unit
in fan mode and at the same time operate other indoor units
in cooling mode, then check the pipe temperature <liquid

Thermistor
(Liquid pipe)

Linear
expansion
valve

It is not necessary to exchange the linear expansion valve, if
the leakage is small and not affecting normal operation.

Check the color of lead wire and missing terminal of the con­nector.

Check points

6
5
4
3
2

LED1kΩ

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 there
is any leaking, detecting temperature of
the thermistor will go lower. If the detected
temperature is much lower than the tem­perature indicated in the remote controller,
it means the valve is not closed all the way.

1

Countermeasures

Exchange the indoor con­troller board at drive circuit
failure.

Exchange the linear expan­sion valve.

Exchange the linear expan­sion valve.

If large amount of refriger­ant is leaked, exchange
the linear expansion valve.

Disconnect the connector
at the controller board,
then check the continuity.

22

7-1-3. DC Fan motor (fan motor/indoor controller circuit board)

Check method of DC fan motor (fan motor/indoor controller circuit board)

Notes

· High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service.

· Do not pull out the connector (CNMF) for the motor with the power supply on.
(It causes trouble of the indoor controller circuit
Self check
Symptom : The indoor fan cannot turn around.

Wiring contact check

Contact of fan motor connector (CNMF)

board and fan motor.)

Is there contact failure?

No

Power supply check (Remove the connector (CNMF))

Measure the voltage in the indoor controller circuit

TEST POINT

: VDC (between 1 (+) and 4 (-) of the fan connector): VDC DC294~325V

Yes

Wiring recovery

board.

TEST POINT : VCC (between 5 (+) and 4 (-) of the fan connector): VCC DC15V

Is the voltage normal?

Yes

Sensor signal check

No

Indoor controller board fuse check

Is the fuse normal? Replace the fuse

Replace indoor controller board.

Measure the voltage between CNMF  and  DC 0V
and DC 15V in the indoor controller circuit board.

Does the voltage repeat

No

DC 0V and DC 15V?

Yes

Replace indoor

controller board

Check the operation END

Replace the fan motor

Replace the fan motor

Yes

NG

No

OK

Check the operation END

NG

OK

OK

Check the operation END

NG

Replace the fan motor.

OK

Check the operation END

NG

Replace indoor controller board.

23

7-2. FUNCTION OF DIP SWITCH

Switch Function Remarks

Pole

ON OFF

Thermistor <Room temperature

Operation by switch

SW1

Function

setting

SW2

Capacity

code

setting

1

detection> position

2

Filter clogging detection

3

Filter cleaning

4

Fresh air intake

Switching remote

5

display

6

Humidifier control

Airflow set in case of

7

Heat thermo OFF at

8

heating mode

9

Auto restart function

10

Power ON/OFF by breaker

Capacity

ON

P15

OFF

1~6

P30

ON

OFF

SW 2 Capacity SW 2

123456

1234 56

Built-in remote controller

Provided

2,500 hr

Effective

Thermo ON signal display

Always operated while the heat in ON 1

Low 3

Setting air flow 3

Effective

Effective

ON

P24

OFF

123456

ON

P36

OFF

1234 56

Indoor unit

Not provided

100 hr

Not effective

Indicating fan operation
ON/OFF

Operated depends on the condition 2

Extra low 3

Depends on SW1-7

Not effective

Not effective

Effective

timing

Under
suspension

Before
power
supply
ON

Address board

<Initial setting>

ON

OFF

1234 567 89

Note :

1

Fan operation at heating

mode

2

Thermo ON operation at

heating mode

3

SW1-7

SW1-8

OFF

OFF Extra low

OFF

ON

ON

OFF

ON

ON

Indoor controller board

Set while the unit is off.

<Initial setting>

Set for each capacity.

10

Low

Setting airflow

Stop

SW3

Function

setting

Heat pump/Cooling only

1

Louver

2

Van e

3

Vane swing function in heating

4

(wave-flow)

Vane horizontal angle

5

Vane cooling limit

6

angle setting

Changing the opening of

7

linear expansion valve
4-deg up

8

(Heating mode)

Superheat setting temperature

9

Sub cool setting temperature

10

Cooling only

Available

Available

Available

Second setting

Horizontal

Effective

Not effective

5

—

5

—

4

Heat pump

Not available

Not available

Not available

First setting

Setting A,B,C,D

Not effective

Effective

—

—

In case of replacing the indoor controller board, make sure to set the switch to the
initial setting, which is shown below.

SW4

Model

Selection

1~5

ON

OFF

12345

Note : 4 SW3-5

SW3-5

Vane setting

Initial setting●Setting Vane position

OFF Set up Standard Standard

ON Set up

Less draft Upward position than the standard

Indoor controller board

Set while the unit is off.

<Initial setting>

ON

OFF

1234 567 89

Note :

4

Under
suspension

4 SW3-5

5 Please do not use
SW-3-9,10.
SW9 setting
P15: ON
P24,P30,P36: OFF
6 Each angle can be used
only 1 hour when fan speed
setting Low and Middle 1,2

10

Indoor controller board

Before
power
supply
ON

24

Switch

Pole

Operation by switch

Effective

timing

Remarks

SWA

Ceiling

height

selector

SWC

Option

selector

SW11

1s digit

address

setting

SW12

10ths digit

address

setting

SW14
Branch

No.

setting

(High ceiling)

1~3

(Standard)

(Silent)

2

Rotary switchRotary switch

(Standard)

SW1210SW11

0

0

1

9

8

7

6

2

3

4

5

SW14

F

E

D

C

B

A

9

8

7

6

1

0

1

2

3

4

5

6

7

8

9

* Ceiling height can be changed depending

3

on SWA setting.

2

1

(Option)

SWA

P15, P24
P30, P36

Silent

8.2ft.(2.5m)

8.5ft.(2.6m)

Standard

8.9ft.(2.7m)

9.8ft.(3.0m)

* In this model it is not necessary to

change SWC to the option side.

How to set address

1

2

Example : If address is "3", remain SW12

3

4

5

(for over 10) at "0", and match SW11 (for 1 to 9)
with "3".

How to set branch number SW14 (Series R2 only)
Match the indoor unit’s refrigerant pipe with the BC
contoller’s end connection number
Remain other than series R2 at "0".

High ceiling

11.5ft.(3.5m)

13.8ft.(4.2m)

Under
operation
or
suspension

Before
power
supply
ON

Address board

<Initial setting>

3
2
1

Address board

<Initial setting>

Address board

Address can be set while the
unit is stopped.

<Initial setting>

SW12 SW11

0

0

1

9

8

7

6

5

1

9

2

4

2

8

3

3

7

4

6

5

Address board

<Initial setting>

SW14

0

1

2

F

3

E

4

D

5

C

6

B

7

A

8

9

25

Switch Pole Operation by switch Remarks

Effective

timing

J41, J42

Wireless

remote

controller

Pair No.

• To operate each indoor unit by each remote controller when installed 2 indoor
units or more are near, Pair No. setting is necessary.
Pair No. setting is available with the 4 patterns

(Setting patters A to D)

.
Make setting for J41, J42 of indoor controller board and the Pair No. of
wireless remote controller.

• You may not set it when operating it by 1 remote controller.
Setting for indoor unit
Jumper wire J41, J42 on the indoor controller board are cut according to
the table below.
Wireless remote controller pair number:
Setting operation

1. Press the SET button (using a pointed implement). Check that the
remote controller's display has stopped before continuing.

MODEL SELECT

flashes, and the model No. (3 digits) appears (steadily-lit).

2. Press the MINUTE button twice. The pair number appears flashing.

3. Press the temperature buttons to select the pair number to set.

4. Press the SET button (using a pointed implement). The set pair number is
displayed (steadily-lit) for 3 seconds, then disappears.

Indoor controller

Setting pattern

Jumper wire

J41 J42

A

B

C

D

—

Cut

—

Cut

Cut

Cut

Pair No.4-9 of wireless remote controller is setting pattern D.

—

—

Pair No. of wireless
remote controller

0

1

2

3

Factory setting

—

—

—

Under
operation
or
suspension

<Initial setting>

CHECK

TEST RUN

SET button

Pattern A

MODEL SELECT

TEMP

ON/OFF

AUTO STOP

FAN

AUTO START

MODE

VANE

LOUVER

RESET

CLOCK

SET

Pair No.

Model No.

Temperature
button

h

Minute
button

min

SWE

Test run

for

Drain

pump

(Option)

Drain pump and fan are activated simultaneously after the connector
SWE is set to ON and turn on the power.

SWE SWE

OFF ON

Connector Jumper

The connector SWE is set to OFF after test run.

Under
operation

<Initial setting>

SWE

OFF ONOFF ON

26

7-3. TEST POINT DIAGRAM

7-3-1. Indoor controller board
PCFY-P15NKMU-E PCFY-P24NKMU-E PCFY-P30NKMU-E PCFY-P36NKMU-E

CN60

Linear expansion valve (LEV)
output
12VDC pulse output

CN4Y

i-See sensor

CN52

Remote indicator

CN51

Centrally controlled

CN44

Pipe temperature thermistor

: Liquid (TH22)
: Gas (TH23)

CN4F

Drain float switch (FS)

CN20

Room temperature

thermistor (TH21)

CN27

Damper signal output
12VDC( : +)

CN90
Connect to the wireless
remote controller board
(W.B)

CN6Y

i-see sensor motor output
12VDC pulse output

CN3A

Connect to the terminal block (TB15)
(MA-Remote controller connecting wire)

- : 8.7-13V DC (Pin (+))

CNV

Vane motor output
12VDC pulse

CN32

Remote switch

Jumper wire J41, J42

Pair No.setting for wireless
remote controller

LED2

Power supply for
MA-Remote controller

SW3

Function setting

SW4

Model selection

SWE

Test run(Drain pump)

SW2

Capacity setting

LED1
Main power supply
(Indoor unit : 208-230V)

CNMF
Connect to the
fan motor (MF)

: DC294~325V
: DC15V
: DC0~6V
:

DC0 or DC15V (Stop)

DC7.5V (Operation)
(12VDC pulse)

CNP
Drain pump output (DP)

: 208-230VAC

CN2M

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

CND

Power supply for indoor controller board

- : 208-230VAC

FUSE

6.3A 250V

27

7-3-2. Address board
PCFY-P15NKMU-E
PCFY-P24NKMU-E
PCFY-P30NKMU-E
PCFY-P36NKMU-E

SW1

Function setting

SW12

Address setting
10ths DIGIT

SW11

Address setting
1st DIGIT

SWA

Ceiling height
selector

SWC

Option selector

SW14

Branch No.

28

8

DISASSEMBLY PROCEDURE

PCFY-P15NKMU-E PCFY-P24NKUM-E
PCFY-P30NKMU-E PCFY-P36NKMU-E

OPERATING PROCEDURE

1. Removing the air intake grille

(1)

Slide the air intake grille holding knobs (at 2 or 3 loca-

tions) to the rear to open the air intake grille. (See Figure 1)

(2) While the air intake grille left open, push the stoppers

on the rear hinges (at 2 or 3 locations) to pull out the air
intake grille. (See Figure 2)

Figure 2

hinges

Pull out the air intake grille

2.

Removing the indoor controller board and the electrical box

(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the screw from the beam and remove the

beam. (See Photo 1)

(3) Remove 2 screws from the electrical cover, and remove

the electrical cover.

(4) Remove 2 screws from the electrical box and pull the

electrical box downward.

Temporarily secure the electrical box using 2 hooks in

the back of electrical box.

(5) Disconnect the connectors on the indoor controller

board.

PHOTOS & ILLUSTRATIONS

Figure 1

Air intake grille

Air intake grille

holding knobs

Photo 1

Electrical cover

Be careful when removing heavy parts.

(Photo: PCFY-P36NKMU-E)

slide

Beam

Electrical cover
fixing screws

[Removing the electrical box]
(6) Disconnect the wires from the terminal blocks and pull

out the electrical box. (See Photo 2)

[Removing the indoor controller board]
(6) Remove the 6 supports from the indoor controller board

and remove the indoor controller board. (See Photo 3)

29

Photo 2

Electrical box

Photo 3

Electrical box
fixing screw

Room temperature
thermistor (TH21)

Terminal blocks
(TB2),(TB5),(TB15)

Indoor controller
board (I.B.)

OPERATING PROCEDURE

PHOTOS & ILLUSTRATIONS

3. Removing the room temperature thermistor (TH21)

(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the screw from the beam and remove the beam.

(See Photo 1)

(3) Remove 2 screws from the electrical cover, and remove

the electrical cover.

(4) Remove 2 screws from the electrical box and pull the

electrical box downward.

Temporarily secure the electrical box using 2 hooks in

the back of electrical box.

(5) Disconnect the connector CN20 (red) from the indoor

controller board.

(6) Remove the sensor holder from the electrical box and

remove the thermistor form the holder.

4. Removing the fan motor and right side fan

(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the screw from the beam and remove the beam.

(See Photo 1)

(3) Remove 2 screws from the electrical cover, and remove

the electrical cover.

(4) Remove 2 screws from the electrical box and pull the

electrical box downward.

(5) Temporarily secure the electrical box using 2 hooks in

the back of electrical box.

(6) Remove the lower casing while pressing the 4 catches of

the casing (right side of the fan motor). (See Photo 6)

(7) Loosen the 2 set screws (2 hexagon set screws) of con-

necting joint and slide the fan motor to the left. (See

Photo 5)
(8) Remove the screw for motor earth wire. (See Photo 5)
(9) Remove the motor piece (left and right, each 1 screw).

(See Photo 5)
(10) Remove the fan motor and right side fan together.
(11) Loosen the set screw (hexagon set screw) of fan and

remove the fan from the shaft. (See Photo 7,8)

Photo 4

Room temperature
thermistor (TH21)

Electrical box

Photo 5

Connecting
joint

Casing

Photo 6

Casing

Catch

Motor piece
fixing screws

Set screws

Casing

Fan motor

Electrical box

Catch

Motor earth wire
fixing screw

Casing

Photo 8

Hexagon set screw

30

Photo 7

Catch

Hole for driver

OPERATING PROCEDURE

PHOTOS & ILLUSTRATIONS

5. Removing the fan (3 connection)

(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the screw from the beam and remove the beam.

(See Photo 1)

(3) Remove 2 screws from the electrical cover, and remove

the electrical cover.

(4) Remove 2 screws from the electrical box and pull the

electrical box downward.

Temporarily secure the electrical box using 2 hooks in

the back of electrical box.

(5) Remove 2 screws from the left side beam and remove

the beam. (See Photo 9)

(6) Loosen 2 set screws (2 hexagon set screws) of connect-

ing joint. (See Photo 5)

(7) Remove 3 lower casings while pressing each 4 catches

of the casing. (See Photo 6)

(8) Remove the 4 screws from the bearing support. (See

Photo 10)

(9) Slide the connecting joint to the left and remove the fans

and shaft together. (See Photo 11)

10

) Remove the fan from the shaft. (See Photo 7,8 )

(

Photo 11

Fan (3 connection)

Photo 9

Photo 10

Bearing sup­port fixing
screws

Beam

Bearing support

Shaft

Bearing support

Shaft

6. Removing the side panel

(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the screw from the side panel, and remove the

side panel by sliding the panel to the front.

Figure 3

Side panel
(Right)

Sliding the panel
to the front

Side panel
(Left)

Screw

31

OPERATING PROCEDURE

7. Removing the vane motor

(1) Remove the air intake. (See Figure 1,2)
(2) Remove the right side panel. (See Figure 3)
(3) Remove the connector of vane motor.
(4) Remove 2 screws of vane motor cover , then remove

vane motor.

PHOTOS & ILLUSTRATIONS

Photo 12

Vane motor and cover

Screws

Connector

8. Removing the under panel

(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the left and right side panels. (See Figure 3)
(3) Remove the beam. (See Photo 1)
(4) Remove the electrical cover. (See Photo 1)
(5) Pull the electrical box downward. (See Photo 2)
(6) (Wireless remote controller receiver type only)
Disconnect the connector CNB from the PCB for wire-

less remote controller and remove the clamp and strap

for wires.
(7) Remove 8 screws from the under panel.
(8) Move the under panel forward by about 7/16in. (10mm)

and remove the under panel.

9. Removing the drain pan

(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the side panel (right and left). (See Figure 3)
(3) Remove the under panel. (See Photo 13)
Remove the screws of the right and left side drain pan.
(See Photo 14)
(4) Remove 2 insulation in centre of the drain pan, and after

removing 2 screws with washer, remove the drain pan.
(See Photo 15,16)

(Note)
Please be aware that there might be some drainage left in
the drain pan when you remove the drain pan.

Photo 16

Photo 13

Under panel fixing
screws

Photo 14

Drain pan fix­ing screws
(left and right
each 1 screw)

Photo 15

Van e

Pipe cover fixing screws

Drain pan

Insulations

Screw with
washer
(2 locations)

32

OPERATING PROCEDURE

10. Removing the pipe thermistors/Liquid (TH22) and Gas
(TH23)

(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the left and right side panels. (See Figure 3)
(3) Remove the under panel. (See Photo 13)
(4) Remove the drain pan. (See Photo 14, 15, 16)
(5) Disconnect the connector CN44 (white) from the indoor

controller board.

(6) Remove 6 screws from the pipe cover and remove the

pipe cover. (See Photo 14, 17)

(7)

Remove the fastener for wires and remove the thermistors
(liquid and gas) from each holder. (See Photo 18)

PHOTOS & ILLUSTRATIONS

Photo 17

Pipe cover fixing
screws

Pipe cover

Pipe cover fix­ing screws
(See Photo 15)

11. Removing the guide vane

(1) Remove the intake grille. (See Figure 1,2)
(2) Remove the side panel (right and left). (See Figure 3)
(3) Remove the under panel. (See Photo 13)
(4) Remove the drain pan. (See Photo 14, 15,16)
(5) Remove the screw from the guide vane, then remove

the guide vane.

12. Removing the Auto vane

(1) Remove the intake grille. (See Figure 1,2)
(2) Remove the right side panel. (See Figure 3)
(3) Remove the vane motor and cover. (See Photo 12)
(4) Slide the auto vane to the vane motor side.
(5) Remove 2 axes from each vane support pushing the

vane support to the vane sleeve side.

Photo 18

Liquid pipe
thermistor

Photo 19

Photo 20

Vane sleeve

Gas pipe
thermistor

Fastener

Screw

Drain pan

Guide vane

Vane support Van e

Vane motor side

33

OPERATING PROCEDURE

13. Removing the heat exchanger and LEV

(1) Remove the air intake grille. (See Figure 1,2)
(2) Remove the beam. (See Photo 1)
(3) Remove the electrical cover. (See Photo 1)
(4) Pull the electrical box downward. (See Photo 2)
(5) Disconnect the connector CN60 (white) from the indoor

controller board.
(6) Remove the left and right side panels. (See Figure 3)
(7) Remove the under panel. (See Photo 13)
(8) Remove the drain pan. (See Photo 14,15,16)
(9) Remove the pipe cover. (See Photo 17)

10

) Remove the pipe thermistors (TH22 and TH23) from

(

each holder. (See Photo 18)
(11) Remove the pipe band fixing screw and remove the

pipe band. (See Photo 21)

12

) Remove 2 screws from the heat exchanger and

(

remove the heat exchanger with LEV.

PHOTOS & ILLUSTRATIONS

Photo 21

Heat exchanger

Pipe band

Pipe band fixing
screw

Photo 22

Heat exchanger
fixing screws

Heat exchanger Va ne

34

35

TM

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU TOKYO 100-8310, JAPAN

Copyright 2009 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Feb. 2009 No. OCH450 PDF 7
Made in Japan

New publication, effective Feb. 2009
Specifications subject to change without notice