Mitsubishi Electronics PLFY-P36, PLFY-P30, PLFY-P24, PLFY-P18, PLFY-P15 User Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

R410A / R22

Indoor unit
[Model names] [Service Ref.]

PLFY-P12NBMU-E

PLFY-P15NBMU-E

PLFY-P18NBMU-E

PLFY-P24NBMU-E

PLFY-P30NBMU-E

PLFY-P36NBMU-E

PLFY-P
PLFY-P
PLFY-P
PLFY-P
PLFY-P
PLFY-P
PLFY-P
PLFY-P
PLFY-P
PLFY-P
PLFY-P

12NBMU-E
12NBMU-ER1
15NBMU-E
15NBMU-ER1
18NBMU-E
18NBMU-ER1
24NBMU-E
24NBMU-ER1
30NBMU-E
30NBMU-ER1
36NBMU-E

November 2008

No. OCH421

REVISED EDITION-A

Revision:

• PLFY-P12/15/18/24/30/36

NBMU-ER1 are added in
REVISED EDITION-A.

• Some descriptions have

been modified.

• Plase void OCH421.

Note:

• This manual does not cover
outdoor units.

When servicing them, please
refer to the outdoor unit’s
service manual.

• RoHS compliant products

have <G> mark on the spec
name plate.

Model name
indication

PLFY-P

INDOOR UNIT

36NBMU-ER1

CONTENTS

1. TECHNICAL CHANGES

2. FEATURES

3. PART NAMES AND FUNCTIONS

4. SPECIFICATIONS

5. 4-WAY AIR FLOW SYSTEM

6. OUTLINES AND DIMENSIONS

7. WIRING DIAGRAM
REFRIGERANT SYSTEM DIAGRAM

8.

9. MICROPROCESSOR CONTROL

10. TROUBLESHOOTING

11. DISASSEMBLY PROCEDURE

PARTS CATALOG (OCB421)

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2
2

3

5

9
12
13
14
15

22

31

1

TECHNICAL CHANGES

PLFY-P12NBMU-E PLFY-P12NBMU-ER1
PLFY-P15NBMU-E PLFY-P15NBMU-ER1
PLFY-P18NBMU-E PLFY-P18NBMU-ER1
PKFY-P24NBMU-E PLFY-P24NBMU-ER1
PKFY-P30NBMU-E PLFY-P30NBMU-ER1
PKFY-P36NBMU-E PLFY-P36NBMU-ER1

INDOOR CONTROLLER BOARD (I.B.) has been changed.

2

FEATURES

Indoor Unit

Models

PLFY-P12NBMU-E 12,000 / 13,500 Btu/h
PLFY-P15NBMU-E 15,000 / 17,000 Btu/h
PLFY-P18NBMU-E 18,000 / 20,000 Btu/h
PLFY-P24NBMU-E 24,000 / 27,000 Btu/h
PLFY-P30NBMU-E 30,000 / 34,000 Btu/h
PLFY-P36NBMU-E 36,000 / 40,000 Btu/h

Cooling capacity / Heating capacity

1. WIDE AIRFLOW

The new wide shape vane capable of wide angle air supply provides comfort even at the corners of a room regardless
of cooling and heating operation. A reduction in the air speed by 20% compared to the conventional product eliminates
uncomfortable draft sensation for friendly air conditioning.

2. WAVE AIRFLOW SYSTEM (HEATING MODE)

The wave airflow system has 4 vanes where each vane runs independently. Repeating of horizontal and down blows with a
time lag allows the conditioned warm air to be distributed even to room corners thus preventing uneven room temperature
distribution.

Operation image of "Wave Airflow"

3. AUTOMATIC AIR SPEED ADJUSTMENT MODE

The automatic air speed adjustment mode is provided in addition to the 4 air speed stages of "High/Medium 1/Medium 2/
Low." Air speed can be changed freely in accordance with a difference between the set temperature and the room tempera­ture. The automatic air speed adjustment mode presents quick cooling of a room with the high mode, such as at the start­ing up of cooling operation, for example. After the room temperature is stabilized, the low mode will be applied by automatic
switching to keep your comfort.

Medium 2

Medium 1

HighLow

Automatic air

speed adjustment

4. i-see Sensor (OPTIONAL CORNER PANEL)

The i see sensor is a radiation temperature sensor originated from Mitsubishi’s new technology. In order to create a really
comfortable space in shops and offices, it is essential to control the temperature near the floor where occupants/visitors
gather. The i see sensor measures the infrared rays generated from the surrounding wall and floor surface at an angle of
360° and the infrared ray energy is computed to convert it into the value of temperature. In addition, the floor temperature
at distant spots (radiation temperature) is also measured to supply the optimum airflow to realize comfort which was never
experienced in the past.

2

3

PART NAMES AND FUNCTIONS

Indoor unit

Air outlet

Liquid pipe

Gas pipe

i-see sensor
(option)

Vane

Wired remote controller

Drain pipe

Filter

Air intake
(Intake grille)

Operation Section

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

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

3

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.

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 46–102F.
The display blinks if the temperature
is less than 46

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

F

or 102F or more.

“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.

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

4

SPECIFICATIONS

4-1. SPECIFICATIONS

Model

Power source
Cooling capacity
(Nominal)

Heating capacity
(Nominal )

External finish
External dimension H

Net weight
Decoration panel

Heat exchanger
FAN

Noise level (Low-Mid2-Mid1-High)
(measured in anechoic room)

Insulation material
Air filter
Protection device
Refrigerant control device
Connectable outdoor unit
Diameter of

refrigerant pipe
(O.D.)

Field drain pipe size

Standard
attachment

Optional parts

Remark

Power input
Current input

Power input
Current input

×

W × D

Model
External finish
Dimension

×

W × D

H
Net weight

Type x Quantity
External
static press.

Motor type
Motor output
Driving mechanism
Airflow rate
(Low-Mid2-

Mid1-High)

Liquid

Gas

Document
Accessory

Air outlet shutter plate
High efficiency filterelement
Multi-function casement

*1

*1

*2

*2

(R410A)

(R22)

(R410A)

(R22)

BTU/h

kW
kW
A
Btu/h
kcal/h
kW
A

in.
mm
Ibs (kg)

in.
mm

Ibs (kg)

in.WG
Pa

in.WG
Pa

kW

cfm

3

m

/min
L / s

dB <A>
dB <A>
dB <A>

in. (mm)

in. (mm)

in. (mm)

PLFY-P12NBMU-E

PLFY-P12NBMU-ER1

12,000

3.5

0.03

0.22

13,500

4.0

0.02

0.14

10-3/16 × 33-3/32 × 33-3/32 10-3/16 × 33-3/32 × 33-3/32 10-3/16 × 33-3/32 × 33-3/32

258

×

840 × 840

49 (22) 49 (22) 51 (23)

PLP-40BAU PLP-40BAU PLP-40BAU

1-3/8 × 37-13/32 × 37-13/32

35

×

950 × 950

13 (6) 13 (6) 13 (6)

0.000 (208V) 0.000 (208V) 0.000 (208V)
0

0.000 (230V)
0

0.050

388 - 424 - 459 - 494

11.0 - 12.0 - 13.0 - 14.0
183 - 200 - 217 - 233

27 - 28 - 29 - 31 (208-230V)

—
—

PP honeycomb (long life filter, anti-bacterial type)

1/4 (6.35) Flare
1/4 (6.35) Flare

1/2 (12.7) Flare
1/2 (12.7) Flare

O.D. 1-1/4 (32) O.D. 1-1/4 (32) O.D. 1-1/4 (32)

PAC-SH51SP-E
PAC-SH59KF-E
PAC-SH53TM-E

PLFY-P15NBMU-E

PLFY-P15NBMU-ER1

1-phase 208-230V 60Hz

15,000

4.4

0.04

0.29

17,000

5.0

0.03

0.22

Galvanized steel sheet

258× 840 × 840 258× 840 × 840

MUNSELL (6.4Y 8.9/0.4)

1-3/8 × 37-13/32 × 37-13/32

35× 950 × 950

Cross fin

Turbo fan

0.000 (230V)

424 - 459 - 494 - 565

12.0 - 13.0 - 14.0 - 16.0
200 - 217 - 233 - 267

27 - 28 - 30 - 31 (208-230V)

R410A, R22 CITY MULTI

1/4 (6.35) Flare
1/4 (6.35) Flare

1/2 (12.7) Flare
1/2 (12.7) Flare

Installation Manual, Instruction Book

PAC-SH51SP-E
PAC-SH59KF-E
PAC-SH53TM-E

0

0

DC motor

0.050

Direct-drive

—
—

PS

Fuse

LEV

×

1Turbo fan × 1 Turbo fan × 1

PLFY-P18NBMU-E

PLFY-P18NBMU-ER1

18,000

5.3

0.05

0.36

20,000

5.9

0.04

0.29

1-3/8 × 37-13/32 × 37-13/32

35× 950 × 950

0

0.000 (230V)
0

0.050

494 - 530 - 565 - 636

14.0 - 15.0 - 16.0 - 18.0
233 - 250 - 267 - 300

28 - 29 - 30- 32 (208-230V)

—
—

1/4 (6.35) Flare
3/8 (9.52) Flare

1/2 (12.7) Flare
5/8 (15.88) Flare

PAC-SH51SP-E

PAC-SH59KF-E

PAC-SH53TM-E

Installation

*1 Nominal cooling conditions Note: *2 Nominal heating conditions

Indoor : 80degF D.B. / 67degF W.B.

(26.7degC D.B. / 19.4degC W.B.)

Outdoor : 95degF D.B. 47degF D.B. / 43degF W.B.

(35degC D.B.) (8.3degC D.B. / 6.1degC W.B.)

Pipe length : 25 ft. (7.6 m) 25 ft. (7.6 m)

Level difference : 0 ft. (0 m) 0 ft. (0 m)

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

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

70degF D.B.
(21.1degC D.B.)

5

Unit converter

kcal/h = kW × 860
BTU/h = kW × 3,412

3

cfm = m

/min × 35.31

lbs = kg/0.4536

*Above specification
data is subject to
rounding variation.

Model

Power source
Cooling capacity
(Nominal)

Power input
Current input

Heating capacity
(Nominal )

Power input
Current input

External finish
External dimension H × W × D

Net weight
Decoration panel

Model
External finish
Dimension
H × W × D

Net weight
Heat exchanger
FAN

Type × Quantity

External

static press.

Motor type

Motor output

Driving mechanism

Airflow rate

(Low-Mid2-

Mid1-High)

Noise level (Low-Mid2-Mid1-High)
(measured in anechoic room)

Insulation material
Air filter
Protection device
Refrigerant control device
Connectable outdoor unit
Diameter of

Liquid

(R410A)
refrigerant pipe
(O.D.)

Gas

(R410A)

Field drain pipe size

Standard
attachment

Optional parts

Document
Accessory

Air outlet shutter plate
High efficiency filterelement
Multi-function casement

Remark

(R22)

(R22)

*1

*1

*2

*2

BTU/h

kW
kW
A

Btu/h

kcal/h
kW
A

in.
mm
Ibs (kg)

in.
mm

Ibs (kg)

in.WG
Pa

in.WG
Pa

kW

cfm

3

/min

m
L/s

dB <A>
dB <A>
dB <A>

in. (mm)

in. (mm)

in. (mm)

PLFY-P24NBMU-E

PLFY-P24NBMU-ER1

24,000

7.0

0.06

0.43

27,000

7.9

0.05

0.36

10-3/16× 33-3/32 × 33-3/32

258 × 840 × 840

51 (23)

PLP-40BAU

1-3/8× 37-13/32 × 37-13/32

35 × 950 × 950

13 (6)

0.000 (208V)
0

0.000 (230V)
0

0.050

530 - 565 - 636 - 706

15.0 - 16.0 - 18.0 -20.0
250 - 267 - 300 - 333

28 - 30 - 32 - 34 (208-230V)

—
—

3/8 (9.52) Flare
3/8 (9.52) Flare

5/8 (15.88) Flare
5/8 (15.88) Flare

O.D. 1-1/4 (32)

PAC-SH51SP-E

PAC-SH59KF-E

PAC-SH53TM-E

PLFY-P30NBMU-E

PLFY-P30NBMU-ER1

1-phase 208-230V 60Hz

30,000

8.8

0.07

0.51

34,000

10.0

0.06

0.43

Galvanized steel sheet

10-3/16× 33-3/32 × 33-3/32

258 × 840 × 840

51 (23)

PLP-40BAU

MUNSELL (6.4Y 8.9/0.4)

1-3/8× 37-13/32 × 37-13/32

35 × 950 × 950

13 (6)

Cross fin

0.000 (208V)
0

0.000 (230V)
0

DC motor

0.050

Direct-drive

565 - 636 - 706 - 777

16.0 - 18.0 - 20.0 - 22.0
267 - 300 - 333 - 367

30 - 32 - 35 - 37 (208-230V)

—
—

PS

PP honeycomb (long life filter, anti-bacterial type)

Fuse

LEV

R410A, R22 CITY MULTI

3/8 (9.52) Flare
3/8 (9.52) Flare

5/8 (15.88) Flare
5/8 (15.88) Flare

O.D. 1-1/4 (32)

Installation Manual, Instruction Book

PAC-SH51SP-E
PAC-SH59KF-E
PAC-SH53TM-E

PLFY-P36NBMU-E

PLFY-P36NBMU-ER1

36,000

10.5

0.16

1.07

40,000

11. 7

0.15

1.00

11-3/4 × 33-3/32 × 33-3/32

298 × 840 × 840

60 (27)

PLP-40BAU

1-3/8× 37-13/32 × 37-13/32

35 × 950 × 950

13 (6)

Turbo fan × 1 Turbo fan × 1 Turbo fan × 1

0.000 (208V)
0

0.000 (230V)
0

0.120

777 - 883 - 989 - 1,059

22.0 - 25.0 - 28.0 - 30.0
367 - 417 - 467 - 500

35 - 38 - 41 - 43 (208-230V)

—
—

3/8 (9.52) Flare
3/8 (9.52) Flare

5/8 (15.88) Flare
3/4 (19.05) Flare

O.D. 1-1/4 (32)

PAC-SH51SP-E

PAC-SH59KF-E

PAC-SH53TM-E

Installation

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

*1 Nominal cooling conditions Note: *2 Nominal heating conditions

Indoor : 80degF D.B. / 67degF W.B.

(26.7degC D.B. / 19.4degC W.B.)

70degF D.B.
(21.1degC D.B.)

Outdoor : 95degF D.B. 47degF D.B. / 43degF W.B.

(35degC D.B.) (8.3degC D.B. / 6.1degC W.B.)

Pipe length : 25 ft. (7.6 m) 25 ft. (7.6 m)

Level difference : 0 ft. (0 m) 0 ft. (0 m)

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

6

Unit converter

kcal/h = kW × 860
BTU/h = kW × 3,412

3

cfm = m

/min × 35.31

lbs = kg/0.4536

*Above specification
data is subject to
rounding variation.

4-2. SOUND LEVEL

PLFY-P-NBMU-E

* Measured in anechoic room.

4-3. NC CURVES

5 ft (1.5m)

Measurement location

PLFY-P12NBMU-E
PLFY-P12NBMU-ER1

PLFY-P15NBMU-E
PLFY-P15NBMU-ER1

PLFY-P18NBMU-E
PLFY-P18NBMU-ER1

PLFY-P24NBMU-E
PLFY-P24NBMU-ER1

PLFY-P30NBMU-E
PLFY-P30NBMU-ER1

PLFY-P36NBMU-E
PLFY-P36NBMU-ER1

Sound level at anechoic room : Low-

Sound level dB (A)

27-28-29-31

27-28-30-31

28-29-30-32

28-30-32-34

30-32-35-37

35-38-41-43

Mid2-Mid1-High

PLFY-P12NBMU-E
PLFY-P12NBMU-ER1

External static pressure : 0Pa

PLFY-P15NBMU-E
PLFY-P15NBMU-ER1

External static pressure : 0Pa

PLFY-P18NBMU-E
PLFY-P18NBMU-ER1

External static pressure : 0Pa

Power source : 208,230V, 60Hz Power source : 208,230V, 60Hz Power source : 208,230V, 60Hz

High 60Hz

70.0

65.0

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

20.0
Approximate minimum

audible limit on

15.0
continuous noise

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

10.0

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

Octave band center frequencies (Hz)

Low 60Hz

PLFY-P24NBMU-E
PLFY-P24NBMU-ER1

External static pressure : 0Pa
Power source : 208,230V, 60Hz Power source : 208,230V, 60Hz

High 60Hz

70.0

65.0

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

20.0

Approximate minimum
audible limit on

15.0

continuous noise

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

10.0

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

Octave band center frequencies (Hz)

Low 60Hz

Middle1 60Hz
Middle2 60Hz

Middle1 60Hz
Middle2 60Hz

70.0

65.0

NC-60

NC-50

NC-40

NC-30

NC-20

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

20.0
Approximate minimum

audible limit on

15.0
continuous noise

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

10.0

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

Octave band center frequencies (Hz)

PLFY-P30NBMU-E
PLFY-P30NBMU-ER1

External static pressure : 0Pa
Power source : 208,230V, 60Hz

70.0

65.0

NC-60

NC-50

NC-40

NC-30

NC-20

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

20.0

Approximate minimum
audible limit on

15.0

continuous noise

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

10.0

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

Octave band center frequencies (Hz)

High 60Hz
Low 60Hz

High 60Hz
Low 60Hz

Middle1 60Hz
Middle2 60Hz

Middle1 60Hz
Middle2 60Hz

70.0

65.0

NC-60

NC-50

NC-40

NC-30

NC-20

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

20.0
Approximate minimum

audible limit on

15.0
continuous noise

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

10.0

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

Octave band center frequencies (Hz)

PLFY-P36NBMU-E
PLFY-P36NBMU-ER1

External static pressure : 0Pa

70.0

65.0

NC-60

NC-50

NC-40

NC-30

NC-20

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

20.0
Approximate minimum
audible limit on

15.0
continuous noise

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

10.0

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

Octave band center frequencies (Hz)

High 60Hz
Low 60Hz

High 60Hz
Low 60Hz

Middle1 60Hz
Middle2 60Hz

Middle1 60Hz
Middle2 60Hz

NC-60

NC-50

NC-40

NC-30

NC-20

NC-60

NC-50

NC-40

NC-30

NC-20

7

4-4. 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-up mechanism

Drain float swich

Linear expansion valve

Power supply terminal
block

Transmission terminal
block

MA remote controller
terminal block

Symbol

TH21

TH22

TH23

FUSE

MF

MV

DP

FS

LEV

TB2

TB5

TB15

PLFY-P12NBMU-E

PLFY-P12NBMU-ER1

DC12V Stepping motor drive port dimension :3.2 (0~2000pulse)

PLFY-P15NBMU-E

PLFY-P15NBMU-ER1

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

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

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

PLFY-P18NBMU-E

PLFY-P18NBMU-ER1

8-pole OUTPUT 50W

EDM-40YGME

PLFY-P24NBMU-E

PLFY-P24NBMU-ER1

250V 6.3A

MSBPC20M04

DC12V 300

PLD-12230ME-1

INPUT 12/10.8W 241/Hr

Open/short detection

(L1, L2, GR) 330V 30A

(M1, M2, S) 250V 20A

(1, 2) 250V 10A



/phase

PLFY-P30NBMU-E

PLFY-P30NBMU-ER1

DC12V Stepping motor drive port

dimension :

PLFY-P36NBMU-E
PLFY-P36NBMU-ER1

8-pole OUTPUT,

5.2

(0~2000pulse)

EDM-80YGME

120W

8

5

4-WAY AIR FLOW SYSTEM

5-1. PLACEMENT OF THE AIR OUTLETS

• For this grille, the blowout direction comes in 11 patterns.
Also, by setting the remote controller to the appropriate settings, you can adjust the air flow and speed. Select the settings
from Table1 according to the location in which you want to install the unit.

1) Decide on the pattern of the airflow direction.

4-direction<Table 1> 3-direction 2-direction

Pattern 1 Initial setting Pattern 4 One air outlet

fully closed

Pattern 6 2 air outlet

fully closed

pattern

Blowout direction

Note: For 3 and 2-direction settings, please use the air outlet shutter plate (option).

2) According to the number of air outlets and height of the ceiling to install the unit, be sure to set up the switches
(SWA, SWB) on the address board to the appropriate setting.

• Correspondence of ceiling heights to numbers of air outlets

SWB

SWA

2

3

3

ON
OFF

12345678910

SW12

0

1

9

2

8

3

7

4

6

5

(10ths DIGIT)

SW1

SW11

0

9

8

7

6

(1s DIGIT)

2
1

1

5

SWC

2

3

4

4

CN82

SW14

E

D

C

B

(BRANCH No.)

CN43

0

1

F

A

9

2

3

4

5

6

7

8

./

.

PLFY-P12·P15·P18·P24·P30NBMU-E(R1)



Silent

2.5m, 8.2ft

2.7m, 8.9ft

3.0m, 9.8ft

Standard

2.7m, 8.9ft

3.0m, 9.8ft

3.3m, 10.8ft

SWB

4 direction



3 direction



2 direction



SWA

PLFY-P36NBMU-E(R1)



Silent

2.7m, 8.9ft

3.0m, 9.8ft

3.3m, 10.8ft

Standard

3.2m, 10.5ft

3.6m, 11.8ft

4.0m, 13.1ft

SWB

4 direction



3 direction



2 direction



SWA





High ceiling

3.5m, 11.5ft

3.5m, 11.5ft

3.5m, 11.5ft





High ceiling

4.5m, 14.8ft

4.5m, 14.8ft

4.5m, 14.8ft

9

5-2. BRANCH DUCT HOLE AND FRESH AIR INTAKE HOLE

At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when
required.

• A fresh air intake hole for the optional multi function casement can also be made.

Note:
The figures marked with * in the drawing below represent the dimensions of the main unit excluding those of the optional
multi function casement.
When installing the optional multi function casement, add 5-5/16” (135 mm) to the dimensions marked on the figure.
When installing the branch ducts, be sure to insulate adequately.
Otherwise, condensation and dripping may occur.

Unit : inch(mm)

Fresh air intake hole



Refrigerant pipe

Indoor unit

Branch duct hole





Drain pipe

:6-7/8 (:175) burring hole pitch

Branch duct hole diagram
(view from either side)

Fresh air intake hole diagram

3-:1/8 (:2.8) burring hole

120

(*158)

6-7/32

3-17/32

3-15/16

3-15/16

(90)

3-17/32

(90)

70

(90)

(100)

13-25/32 (350)

:4-29/32 (:125) burring hole pitch

120

3-:15/16 (:100) cut out hole

Ceiling

3-15/16 (100)

5-1/8 (130)

*6-3/32 (155)

*6-9/16 (167)

14-:1/8 (:2.8) burring hole

:5-29/32 (:150) cut out hole

5-3. OPERATION IN CONJUNCTION WITH

DUCT FAN (Booster fan)

• Whenever the indoor unit is operating, the duct fan also
operates.

(1) Connect the optional multiple remote controller adapter

(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.

MB: Electromagnetic switch power relay for duct fan.

X: Auxiliary relay (For DC 12V, coil rating: 1.0W or smaller)

CN51
on
indoor
controller
board

Indoor controller board

Multiple remote
controller adapter
PAC-SA88HA-E

Connector (5P)

Indoor unit side

10

5

1

CN51

Be sure to secure insulation

Green

CN51

material by tape, etc.

Red

Brown

Multiple remote
controller adapter
PAC-SA88HA-E

Yellow

Orange

~

MB

Installation at site

Be sure to secure insulation
material by tape, etc.

Distance between indoor
controller board and relay
must be within 10m (33ft).

5-4. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
1 PLFY-P12 · P18 · P24 · P30NBMU-E(R1)

Multifunction casement + High efficiency filter Multifunction casement + Standard filter

50(20)

)]

-2

0

-50(-20)

-100(-40)

-150(-60)

Static pressure [Pa(in.W.G.%10

-200(-80)
012

Taking air into the unit

50(20)

)]

-2

0

-50(-20)

-100(-40)

-150(-60)

Static pressure [Pa(in.W.G.%10

-200(-80)
012

50 100 150 200

50 100 150 200

Air flow rate

Air flow rate

2 PLFY-P36NBMU-E(R1)

2 - inlet

1 - inlet

[CMM]

345

3456

6

[CFM]

[CMM]

[CFM]

50(20)

)]

-2

0

-50(-20)

-100(-40)

-150(-60)

Static pressure [Pa(in.W.G.%10

-200(-80)
012

How to read curves

Curve in the

1

graphs.

0

Q

2

Q

3

Q

Qa

2 - inlet

1 - inlet

50 100 150 200

Duct characteristics
at site

A

C

B

345

Q…Designed amount of fresh air intake

A…Static pressure loss of fresh air

intake duct system with air flow
amount Q <Pa (in.W.G.o10-2)>

B…Forced static pressure at air condi-

tioner inlet with air flow amount Q

<Pa (in.W.G.o10

A

EC

C…Static pressure of booster fan with air

flow amount Q <Pa (in.W.G.o10

D…Static pressure loss increase amount

of fresh air intake duct system for air
flow amount Q <Pa (in.W.G.o10

E…Static pressure of indoor unit with air

flow amount Q <Pa (in.W.G.o10

AD

Qa…Estimated amount of fresh air

intake without D <CMM (CFM)>

<CMM (CFM)>

Multifunction casement + Standard filter Multifunction casement + High efficiency filter

6

[CMM]

[CFM]

-2

)>

-2

)>

-2

)>

-2

)>

50(20)

)]

-2

0 0

-50(-20)

-100(-40)

-150(-60)

Static pressure [Pa(in.W.G.%10

-200(-80)
02

50 100 150 200 250

Taking air into the unit

50(20)

)]

-2

0

-50(-20)

-100(-40)

-150(-60)

Static pressure [Pa(in.W.G.%10

-200(-80)
02

50 100 150 200 250

50(20)

)]

-2

-50(-20)

2 - inlet

1 - inlet

48

Air flow rate

48

Air flow rate

6

6

[CMM]

[CFM]

[CMM]

[CFM]

-100(-40)

-150(-60)

Static pressure [Pa(in.W.G.%10

-200(-80)

1 - inlet

02

50 100 150 200 250

48

Air flow rate

2 - inlet

6

[CMM]

[CFM]

11

6

OUTLINES AND DIMENSIONS

PLFY-P12NBMU-E(R1) PLFY-P15NBMU-E(R1) PLFY-P18NBMU-E(R1) Unit : inch (mm)
PLFY-P24NBMU-E(R1) PLFY-P30NBMU-E(R1) PLFY-P36NBMU-E(R1)

25/32~1-25/32(20~45)

Fresh air
intake hole

(160)

6-5/16

Branch duct hole

33-1/16(840)

(90)

3-17/32

(150)

C

5-29/32

Suspension bolt
M10 or W3/8

1

6-16/5

(160)

For MA-Remote controller
terminal block

D

7-3/8

(187.5)

(60)

2-3/8

Ceiling hole

33-27/32 to 35-13/16(860~910) 25/32 to 1-25/32(20~45)

31-7/8(810)

Suspension bolt pitch

Indoor unit/Outdoor unit
connecting terminal block

For wiring replacement kit
terminal block

(840)

33-1/16

(284)

14-27/3211-3/16

(377)

6-5/16

(160)

Suspension bolt pitch

(160)

(24)

15/16

6-5/16

Drain pipe
connected to VP-25

(7.5)

(5/16)(5/16)

+35

-5

(605 )

-3/16

+1-3/8

24-13/32

23-13/16

(7.5)

(620)

1-25/32

25/32 to

Ceiling hole

33-27/32 to 35-13/16(860~910)25/32

to 1-25/32

Detail connecting of branch duct (Both aspects)

(20~45)

Branch
duct hole

(20~45)

Connected the attached
flexible pipe or socket.

3-17/32

13-25/32

(350)

3-15/16

(100)

3-17/32

Cut out hole

ø5-29/32(ø150)

Cut out hole

(90)

(100)

3-15/16

14-ø1/8(14-ø2.8)

Burring hole

(130)

5-1/8

3-15/16
(90)

70

(ø175)

6-7/8

Burring hole pitch

(100)

Detail drawing of fresh air intake hole

Burring hole
3-ø1/8(3-ø2.8)

)(

120

Burring hole pitch

ø4-29/32(ø125)

+6-9/16(167)

+6-3/32(155)

2

(170)

+5-1/2

+6-11/16

Suspension bolt
lower edge

(950)

37-3/8

Air intake
grille

Ceiling

Grille

Entire
periphery

(140)

1-31/32 to 2-3/4

(500)

19-11/16

Air outlet hole

(83)

3-17/64

(36)

Corner pocket

1-27/64

Min.19-11/16(500)

(50~70)

M

M

Indoor unit

23-1/2

Air intake hole

19-11/16
Air outlet hole

37-3/8

Min.94-1/2(2400)
from floor

Floor

(597)

(500)

(950)

M

3-17/64

+4-1/8(105)

Ceiling

Grille

Drain hole
Drain pump clean hole
and Drain emergency
drainage hole

M

1-27/64

(83)

A

+B

(190)

(156)

+7-15/32

+6-9/64

+3/16

0

+5

0

1-3/8

(17 )

11/16

Auto vane
(Air outlet)

(597)

23-1/2

Air intake hole

Vane motor

(36)

Models

PLFY-P12NBMU-E
PLFY-P15NBMU-E
PLFY-P18NBMU-ER1

PLFY-P18NBMU-E

PLFY-P24NBMU-E
PLFY-P30NBMU-E

PLFY-P36NBMU-E

PLFY-P36NBMU-ER1

Keep 25/64(10) to 19/32(15)
between unit ceiling
and ceiling slab.

In case of standard grille

(35)

Note:

1. Please choose the Grille from a standard grille.

2. As for drain pipe, please use VP-25 (O.D. :1-1/4(:32) PVC TUBE.)
Drain pump is included.
Max. lifting height is 70-7/18 (850mm) from the ceiling.

3. As for suspension bolt, please use M10 or W3/8. (Procured at local site)

4. Electrical box may be removed for the service purpose.
Make sure to slack the electrical wire little bit for control/power wires connection.

5. The height of the indoor unit is able to be adjusted with the grille attached.

6. For the installation of the optional high efficiency filter or optional multi-functional
casement.

1) Add 5-5/16"(135mm) to the dimensions marked on the figure.

2) The optional high efficiency filter becomes optional multi-functional casement
and concomitant use.

7. When installing the branch ducts, be sure to insulate adequately.
Otherwise condensation and dripping may occur.
(It becomes the cause of dew drops/water dew.)

8. As for necessary installation/service space, please refer to the left figure.



Refrigerant pipe

···ø6.35
Flared connection

···1/4F
Refrigerant pipe

ø6.35 / ø9.52
Flared connection
1/4F / 3/8F
(compatible)

Refrigerant pipe

···ø9.52
Flared connection

···3/8F

Refrigerant pipe ···ø12.7
Flared connection ···1/2F

Refrigerant pipe ø12.7 / ø15.88
Flared connection 1/2F / 5/8F
(compatible)

Refrigerant pipe ···ø15.88
Flared connection ···5/8F

Refrigerant pipe ø15.88 / ø19.05
Flared connection 5/8F / 3/4F
(compatible)

Refrigerant pipe ···ø15.88
Flared connection ···5/8F

6-7/32

(+158)

In case of wireless remote controller

Emergency operation switch <Cooling>
and Emergency Up/Down switch <Up>

Receiver

Operation lamp

9-1/2

11-1/16

(281)

Cut out hole

120

ø3-15/16(ø100)

Ceiling

Emergency operation switch <Heating>
and Emegency Up/Down switch <Down>

DEFROST/STAND BY lamp

DCBA

3-5/32

3-11/32

(85)

2-29/32

(74)(80)(258)(241)

3-1/32

(77)

10-3/16

11-3/4

(298)

12

7

WIRING DIAGRAM

PLFY-P12NBMU-E(R1) PLFY-P15NBMU-E(R1) PLFY-P18NBMU-E(R1)
PLFY-P24NBMU-E(R1) PLFY-P30NBMU-E(R1) PLFY-P36NBMU-E(R1)

<+1>

MODELS

P12

P15

P18

4

81 41

ADDRESS

CN42
(RED)

91

LIQUID/PIPE

CN44

(WHT)

194

BZ

LED2

LED1

RU

SW2 SW2

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

SW3

ON

OFF

12345678910 12345612345

CN24

(YLW)

12 12

FLOAT SW

CN4F

(WHT)

14FS12

tt

TH23TH22

SWE

ONOFF

13

CN3G

(BLK)

MODELS

ON

P24

OFF

123456

ON

P30

OFF

123456

ON

P36

OFF

123456

See fig:+1

SW4

SW2

ON
OFF

DC311~339V
RECTIFICATION

CN25

(WHT)

LED1

INTAKE

CN27

CN20

(RED)

(RED)

12

t

+Be sure to turn off the source power
and then disconnect fan motor connector.

TH21

(Failure to do so will cause trouble in Fan motor)

(WHT)

714

FAN

CNMF

MS

3~

MF

GRILLE

MV

MVMVMV

MMMM

5555

I-SEE SENSOR MOTOR

CN6Y
(RED)

16

I-SEE SENSOR

CN4Y

(WHT)

14

16

CN52

(GRN)

54

I-SEE

M

SENSOR

I-SEE SENSOR CORNER PANEL
(OPTION PART)

MT

WHT

A.B

1011121314151617181920

MA REMOCON

1

LEV
CN60
(WHT)

6

BLU

RED

YLW

ORN

M

LEV

ON

OFF

12345678910

10ths DIGIT 1s DIGIT

VANE

(WHT)

CN3A
(BLU)

3

CN51

(WHT)

BRN

SW1

SW12 SW11

0

0

1

9

9

2

8

8

3

7

7

4

6

6

5

CN32

(WHT)

13

123456789

CNV

LED2

CN41

(WHT)

141515

TB15

BLU
BLU

3
2
1

SWC

1

2

3



4

5



Pair No.

TO MA-REMOTE

1

CONTROLLER

2

DC8.7-13V

(RED)

ADDRESS

CN43

SWBSWA

2
3
4

SW14

F

E

D

C

B

A

BRANCH

No.

J41J42

4

1

ADDRESS

0

1

2

3

4

5

6

7

8

9

8

W.B

8

(RED)

CN82

1

ADDRESS

CN81

(RED)

WIRELESS

CN90
(WHT)

CNB

SW1

SW2

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.<+1>.
+2.Use copper supply wires.

21

M-NET
CN2M
(BLU)

BLU
BLU

ZNR01

D.U.M

CNP

(BLU)

TB5

TO OUTDOOR UNIT
BC CONTROLLER

M1

REMOTE CONTROLLER

M2

DC24-30V

S

(SHIELD)

ZNR02

FUSE

U

X1

31

M

1~

DP

DSA

135

U

RED

BLU

GRN/YLW

CND

CNAC

(WHT)

31

POWER SUPPLY
~/N 208-230V 60Hz

+2

TB2

L1
L2

GR

I.B

BREAKER
(16A)

FUSE(16A)

PULL BOX

TO NEXT
INDOOR UNIT

[LEGEND]

SYMBOL

I. B

INDOOR CONTROLLER BOARD

CN27

CONNECTOR DAMPER
CN32
CN51
CN52

SURGE ABSORBER

DSA
FUSE

FUSE (T6.3AL250V)

POWER SUPPLY (I. B)

LED1
LED2

POWER SUPPLY (I. B)
SW2

SWITCH
SW3
SW4
SWE

AUX. RELAY

X1

VARISTOR

ZNR01,02

REMOTE SWITCH
CENTRALLY CONTROL
REMOTE INDICATION

CAPACITY CODE
MODE SELECTION
MODEL SELECTION
DRAIN-UP MACHINE (TEST MODE)
DRAIN WATER LIFTING-UP MACH.

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.

DP
FS
LEV
MF
MV
TB2
TB5
TB15
TH21

TH22

TH23

DRAIN-UP MACHINE
DRAIN FLOAT SWITCH
LINEAR EXPANSION VALVE
FAN MOTOR
VANE MOTOR
TERMINAL
BLOCK

THERMISTOR

POWER SUPPLY
TRANSMISSION
MA-REMOTE CONTROLLER
ROOM TEMP. DETECTION
(0/15k, 25/5.4k)
PIPE TEMP. DETECTION / LIQUID
(0/15k, 25/5.4k)
PIPE TEMP. DETECTION / GAS
(0/15k, 25/5.4k)

SYMBOLNAME SYMBOL NAME NAME

A. B

OPTION PART

ADDRESS BOARD

SWA

SWITCH

SWB

SWC
SW1
SW11
SW12
SW14

PCB FOR WIRELESS REMOTE CONTROLLER

W.B

BZ

BUZZER

LED1

LED (OPERATION INDICATION: GREEN)

LED2

LED (PREPARATION FOR HEATING: ORANGE)
RECEIVING UNIT

RU
SW1

EMERGENCY OPERATION (HEAT/DOWN)

SW2

EMERGENCY OPERATION (COOL/UP)

CEILING HEIGHT SELECTOR
DISCHARGE OUTLET NUMBER
SELECTOR
OPTION SELECTOR
MODE SELECTION
ADDRESS SETTING 1s DIGIT
ADDRESS SETTING 10ths DIGIT
BRANCH NO.

13

8 REFRIGERANT SYSTEM DIAGRAM

PLFY-P12NBMU-E(R1) PLFY-P15NBMU-E(R1) PLFY-P18NBMU-E(R1)
PLFY-P24NBMU-E(R1) PLFY-P30NBMU-E(R1) PLFY-P36NBMU-E(R1)

Refrigerant flow in cooling
Refrigerant flow in heating

Item

Gas pipe

Liquid pipe

Heat exchanger

Room temparature thermistor TH21

Model

PLFY-P12/P15NBMU-E

PLFY-P12/P15NBMU-ER1

:12.7 (1/2'')

:6.35 (1/4'')

Gas pipe thermistor TH23

Liquid pipe thermistor TH22

Linear expansion valve

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

PLFY-P18NBMU-E

PLFY-P18NBMU-ER1

:12.7 (1/2'')/:15.88 (5/8'')

:6.35 (1/4'')/:9.52 (3/8'')

Strainer (#100mesh)

Gas pipe

Flare connection

Liquid pipe

Strainer (#100mesh)

PLFY-P24/P30NBMU-E

PLFY-P24/P30NBMU-ER1

:15.88 (5/8'')

:9.52 (3/8'')

Unit : mm (inch)

PLFY-P36NBMU-E

PLFY-P36NBMU-ER1

:15.88 (5/8'')/:19.05 (3/4'')

:9.52 (3/8'')

14

MICROPROCESSOR CONTROL9

INDOOR UNIT CONTROL
9-1. 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

ûF ûC

ON

OFFHrAFTER

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

ON/OFF

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 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

To be continued on the next page.

15

From the preceding page.

Control modes

3. Drain pump

Control details

3-1. Drain pump control

•Always drain pump 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), OFF the control after the drain pump ON for 3 minutes.

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

Remarks

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] or [Low] 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.

16

9-2. DRY OPERATION

TIME SUN MON TUE WED THU FRI SAT
TIMER

AFTER

ûF ûC

ONLY1Hr.

TEMP.

MENU

ON/OFF

BACK DAY

MONITOR/SET

PAR-21MAA

CLOCK

Control modes

1. Thermo regulating
function

<How to operate>

ERROR CODE

ON

OFFHrAFTER

ûF ûC

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

ON/OFF

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 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 64F

Less than 64F

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. Frozen prevention control
No control function

Indoor fan operation controlled depends 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

17

9-3. 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>

1 Press POWER ON/OFF button.
2 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

18

9-4. 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>

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 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. 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. 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 A. (Terminating the 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.

To be continued on the next page.

19

· 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

20

9-5. AUTO OPERATION [AUTOMATIC COOL/HEAT CHANGE OVER OPERATION]

<How to operate>

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 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

ûF ûC

ONLY1Hr.

ON/OFF

CLOCK

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

Control details

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

9-6. WHEN UNIT IS STOPPED CONTROL MODE

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

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.

21

· Same control
as COOL
operation

10

TROUBLESHOOTING

10-1. HOW TO CHECK THE PARTS
PLFY-P12/15/18/24/30/36NBMU-E PLFY-P12/15/18/24/30/36NBMU-ER1

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)

YLW

1

3

YLW

Drain float switch (FS)

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

Red - Yellow (-, -, -, -)
Red - Blue (-, -, -, -)
Red - Orange (-, -, -, -)

300

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.
With electricity being turned on, measure the power voltage between connectors with tester.
i-see sensor rotates then pull out the connector of motor for i-see sensor.

Black plastic tape

Do not disassemble corner panel
with i-see sensor.

Abnormal

Open or short

Switch

Magnet

Moving
Part

4321

43 1

2

Blue

Black

Pink

Brown

Vane motor for
i-see sensor (Option)

White

Orange

Red

Blue

Linear expansion
valve (LEV)

M

White

Red

Orange

Yellow

Blue

Brown

Yellow

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

150k $10%

22

Abnormal

Abnormal

Open or short

Refer to 8-1-2.

10-1-1. Thermistor

<Thermistor characteristic graph>

Thermistor for
lower temperature

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

Thermistor R0=15k' ± 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 (k)

20

30_F 15.8k'
50_F 9.6k'

10

70_F 6.0k'
80_F 4.8k'
90_F 3.9k'
100_F 3.2k'

10-1-2.

1 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)

Controller board

DC12V

Linear expansion valve

4

M

6

2

5

White

1

Red

3

Orange

Blue

Brown

Yellow

Brown

Red

:4

:3

:2

:1

Blue

Orange

Yellow

White

Connector(CN60)

6

5

4

3

2

1

Drive circuit

:4

:3

:2

:1

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.

23

<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)

{1
{2
{3
{4

1
ON
ON

OFF
OFF

2 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

A 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

E to A 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)

3 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 con-

nect LED for checking.

When power is turned on, pulse signals will 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, yellow-

brown, orange-red, blue-brown) using a tester. It is normal if
the resistance is in the range of 150' ±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 con-

nector.

Check points

6
5
4
3
2

LED1k

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 vale.

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.

24

10-1-3. DC Fan motor (fan motor/indoor controller board)

Check method of indoor fan motor (fan motor/indoor controller 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 board and fan motor)
Self check



Conditions : The indoor fan cannot turn around.

Wiring contact check

Contact of fan motor connector (CNMF)
Contact of power supply cable

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

Fan motor position sensor signal check

Turn around the fan motor more than one revolution slowly, and check
the voltage TEST POINT V

FG (between 7(+) and 4(-)).

No

Does the voltage repeat DC0V and DC15V?

Yes

Replace the indoor controller board.

OK

Check the operation of fan.

NG

END

Trouble of the indoor controller board
Replace the indoor controller board.

No

Trouble of the fan motor
Replace the fan motor.

Yes

Check the operation of fan.

NG

Replace the indoor
controller board

Replace the fan motor.

Yes

Check the operation of fan.

NG

Replace the fan motor.

OK

END

OK

END

25

10-2. FUNCTION OF DIP SWITCH

Switch Function Remarks

Pole

Operation by switch

ON OFF

Thermistor <Room temperature

SW1

Function

setting

1

detection> position

2

Filter clogging detection

3

Filter cleaning

4

Fresh air intake

Switching remote

5

display

6

Humidifier control

7

Air flow set in case of
Heat thermo OFF

8

9

Auto restart function

10

Power ON/OFF by breaker

Built-in remote controller

Provided

2,500hr

Effective

Thermo ON signal display

Always operated while the heat in ON +1

Low +3

Setting air flow +3

Effective

Effective

Indoor unit

Not provided

100hr

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

Note :

+1

mode

Under
suspension

+2

operating.

Address board

<Initial setting>

ON

OFF

1234 56789

Fan operation at Heating

Heating thermo ON is

+3

SW1-7

SW1-8
OFF

ON

OFF

ON

OFF Extra low

OFF

ON

ON

10

Low

Setting air flow

Stop

SW2

Capacity

code

setting

SW3

Function

setting

MODELS

P12

P15

1~6

P18

Heat pump/Cooling only

1

Louver/Humidifier

2

Vane

3

Vane swing function in heating

4

(wave-flow)

Vane horizontal angle 

5

Vane horizontal angle 

6

Changing the opening of

7

linear expansion valve

Sensible temperatre correction

8

Superheat setting temperature

9

Sub cool setting temperature

10

SW2 SW2

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

MODELS

P24

P30

P36

Cooling only

Available

Available

Available

Second setting

Third setting

Effective

Not effective

+5

—

+5

—

ON

OFF

123456

ON

OFF

123456

ON

OFF

123456

+4

+4

Heat pump

Not available

Not available

Not available

First setting

+4

Depends on SW3-5

Not effective

Effective

—

—

Before
power
supply
ON

Under
suspension

Indoor controller board

<Initial setting>

Set for each capacity.

Indoor controller board

<Initial setting>

ON

OFF

1234 56789

Note :
+4

SW3-5,6

+5

Please do not use
SW-3-9,10 as trouble
might be caused by the
usage condition.

10

SW4

Model
Selection
(Setting

for

PLFY

series)

1~5

ON

OFF

12345

Before
power
supply
ON

Indoor controller board

Note : +4 SW3-5,6

SW3-5

SW3-6 Vane setting

Initial setting●Setting Vane position

OFF OFF Set up  Standard Standard
ON OFF Set up  Less draft * Upward position than the standard
OFF ON Set up  Less smudging Downward position than the standard

ON ON unused — —

* Be careful of the smudge on ceiling.

26

Switch

Pole

Operation by switch

Effective

timing

Remarks

SWA

Ceiling

height

selector

SWB

Discharge

outlet

number

selector

SWC

Option

selector

(High ceiling)

1~3

(Standard)

(Silent)

3



2



(2

direction)

direction)

(3

(4 direction)

(Option)

(Standard)

* Ceiling height can be changed depending on

3

2

1

2

3

4

SWB setting.

PLFY-P12·P15·P18·P24·P30NBMU-E(R1)

SWA

SWB

4 direction



3 direction



2 direction



PLFY-P36NBMU-E(R1)

SWA

SWB

4 direction



3 direction



2 direction





Silent

2.5m, 8.2ft

2.7m, 8.9ft

3.0m, 9.8ft



Silent

2.7m, 8.9ft

3.0m, 9.8ft

3.3m, 10.8ft



Standard

2.7m, 8.9ft

3.0m, 9.8ft

3.3m, 10.8ft



Standard

3.2m, 10.5ft

3.6m, 11.8ft

4.0m, 13.1ft



High ceiling

3.5m, 11.5ft

3.5m, 11.5ft

3.5m, 11.5ft



High ceiling

4.5m, 14.8ft

4.5m, 14.8ft

4.5m, 14.8ft

Under
operation
or
suspension

Address board

<Initial setting>

3
2
1

Address board

<Initial setting>

2
3
4

Address board

When attaching the optional high performance
filter elements (multi function casement) to

<Initial setting>

the unit, be sure to attach it to the option
side in order to prevent the airflow reducing.




SW11

1s digit

address

setting

SW12

10ths digit

address

setting

SW14

Branch

No.

setting

SW1210SW11

0

1

9

2

8

3

7

4

6

5

Rotary switchRotary switch

SW14

F

E

D

C

B

A

Address board

0

9

8

7

6

5

1

How to set address

1

2

Example : If address is "3", remain SW12

3

4

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

<Initial setting>

SW12 SW11

0

0

1

9

8

7

6

5

1

9

2

4

2

8

3

3

7

4

6

5

Before
power
supply

Address board

ON

0

1

2

3

4

5

6

7

8

9

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".

<Initial setting>

SW14

0

1

2

F

3

E

4

D

5

C

6

B

7

A

8

9

27

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 one 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 No.:

Setting operation

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

MODEL SELECT

blinks, 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 No. 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

Initial setting

—

—

—

Under
operation
or
suspension

Indoor controller board

<Initial setting>

Pattern A

MODEL SELECT

TEMP

ON/OFF

AUTO STOP

FAN

AUTO START

MODE

VANE

h

LOUVER

CHECK

TEST RUN

SET button

min

RESET

CLOCK

SET

Pair No.

Model No.

Temperature
button

Minute
button

SWE

Test run

for
Drain
pump

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.

OFF ON

Under
operation

Indoor controller board

<Initial setting>

SWE

OFF ON

28

10-3. TEST POINT DIAGRAM

10-3-1. Indoor controller board
PLFY-P12/15/18/24/30/36NBMU-E PLFY-P12/15/18/24/30/36NBMU-ER1

CN60

Linear expansion valve (LEV)
output
12VDC pulse output

CN4Y

i-See sensor

CN52

Remote indicator

CN51

Centrally controlled

CN44

Pipe temperature thermistor

1-2 : Liquid (TH22)
3-4 : Gas (TH23)

CN4F

Drain float switch (FS)

CN20

Room temperature
thermistor (TH21)

CN27

Damper signal output
12VDC(1 : +)

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)
1 - 3 : 8.7-13V DC (Pin1 (+))

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)

1-4 : DC310~340V
5-4 : DC15V
6-4 : DC0~6V

DC0 or DC15V (Stop)

7-4 :

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

CNP
Drain pump output (DP)

1-3 : 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
3 - 5 : 208-230VAC

FUSE

6.3A 250V

29

10-3-2. Circuit board

PLFY-P12NBMU-E(R1) PLFY-P15NBMU-E(R1) PLFY-P18NBMU-E(R1)
PLFY-P24NBMU-E(R1) PLFY-P30NBMU-E(R1) PLFY-P36NBMU-E(R1)

SW1

Function setting

SW12

Address setting
2nd digit

SWA

Ceiling height
selector

SW11

Address setting
1st digit

SWB

Discharge outlet

number selector

SWC

Option selector

30

11

DISASSEMBLY PROCEDURE

PLFY-P12NBMU-E(R1) PLFY-P15NBMU-E(R1) PLFY-P18NBMU-E(R1)
PLFY-P24NBMU-E(R1) PLFY-P30NBMU-E(R1) PLFY-P36NBMU-E(R1)

Be careful when removing heavy parts.

OPERATING PROCEDURE

1. Removing the air intake grille

(1) Slide the knob of air intake grille toward the arrow 1 to

open the air intake grille.

(2) Remove drop prevention hook from the panel.
(3) Slide the shaft in the hinge to the direction of the arrow 2

and remove the air intake grille.

2. Removing the room temperature thermistor (TH21)

(1) Remove the air intake grille and the filter. (See Figure 1)
(2) Remove the 2 screws from the electrical box.
(3) Disconnect the connector CN20 (Red) from the indoor con­ troller board.
(4) Remove the room temperature thermistor.

3. Removing the address board (A.B)

(1) Remove the air intake grille and the filter. (See Figure 1)
(2) Remove the 2 screws from the address board cover.
(3) Disconnect the connectors CN43 (RED/4P) and CN82

(RED/8P).

(4) Slide and remove the address board.

Figure 1

Photo 1

MA remote
controller
terminal
cover

Terminal

cover
fixing

screw

PHOTOS & ILLUSTRATIONS

Filter

Address board
cover fixing
screw

Address
board

Address
board
fixing screw

Electrical box cover

fixing screws

Electrical box cover

cover

4. Removing the indoor controller board (I.B)

(1) Remove the air intake grille and the filter. (See Figure 1)
(2) Remove the 2 screws from the electrical box cover.
(3) Disconnect the connectors :
CNMF (White/7P) for fan motor
CN44 (White/4P) for thermistor (TH22/TH23)
CNP (Blue/3P) for drain pump
CN4F (White/4P) for float switch
CN01 (Black/5P) for earth and TB2
CNV (White/20P) for vane motor
CN81, CN42 (Red/8P, 4P) for address board
CN2M (Blue/2P) for TB5
CN3A (Blue/3P) for TB15
(4) Remove the 6 supports from indoor controller board.
(5) Remove the indoor controller board.

5. Removing the electrical box

(1) Remove the air intake grille and the filter. (See Figure 1)
(2) Remove the 2 screws from the electrical box cover.
(3) Disconnect the connectors. (Refer to 4.)

Remove 4 electrical box fixing screws and remove 2 hooks.

(4)
(5) Pull the electrical box.

<Electrical parts in the electrical box>

Indoor controller board
Terminal block (TB2) (TB5)

Photo 2

Room temp.
thermistor
(TH22)

Electrical
box fixing
screw

Electrical box

Indoor controller
board

Bell mouth

Turbo fan

Nut

Electrical
box
fixing
screw

Support for Indoor
controller board

31

OPERATING PROCEDURE

PHOTOS & ILLUSTRATIONS

6. Removing the fan and fan motor (MF)

(1) Remove the electrical box. (See Photo 2)
(2) Remove the bell mouth (3 screws). (See Photo 2)
(3) Remove the turbo fan nut.
(4) Pull out the turbo fan.
(5) Remove the wire cover (3 screws).
(6) Remove 2 wiring clamps.
(7) Disconnect the connector of the fan motor (CNMF).
(8) Remove the 3 nuts and washers and rubber mounts of the

fan motor.

7. Removing the panel

(1) Remove the air intake grille and the filter. (See Figure 1)
(2) Disconnect the connector CNV (White/20P).

Corner panel (See Figure 2)

(3) Remove the corner screw.
(4) Slide the corner panel to the direction of the arrow 1, and

remove the corner panel.

Panel (See Photo 4, 5)

(5) Remove the 2 screws from the panel which fixes to the oval

holes.

(6) Rotate the panel a little to come to the bell shaped hole

where the screw is large and remove the panel.

Photo 3

Figure 2

Corner panel

Photo 4

Fan motor

Screw

Detail

Coil plate

Screw

Corner panel

Bell shaped hole

Clamp

Wire cover
fixing screw

Nut
Washer
Rubber mount

Panel

Photo 5

8. Removing the drain pan

(1) Remove the air intake grille and the filter. (See Figure 1)
(2) Remove the 2 screws from the electrical box cover.
(3) Disconnect the connectors. (Refer to 4.)
(4) Remove the panel. (See Photo 4, 5)
(5) Remove the electrical wiring service panel (3 screws).
(6) Remove the drain pump wire cover (1 screw).
(7) Remove the electrical box. (See Photo 2)
(8) Remove the bell mouth. (See Photo 2)
(9) Remove the 4 screws and pull out the drain pan.
w Pull out the left and right of the pan gradually.
Be careful not to crack or damage the pan.

Photo 6

Drain pan
fixing screw

Electrical wiring
service panel

Drain pan
fixing screw

Oval hole

Drain pump wire cover

Electrical wiring ser­vice panel fixing screw

Drain pan
fixing screw

Drain pan

32

OPERATING PROCEDURE

PHOTOS & ILLUSTRATIONS

9. Removing the liquid pipe temperature thermistor (TH22)
and gas pipe temperature thermistor (TH23)

(1) Remove the drain pan. (See Photo 6)
(2) Remove the turbo fan. (Refer to 6)
(3) Remove the 2 wiring clamps. (See Photo 3)
(4) Remove the coil plate (2 screws).
(5) Remove the thermistors which are inserted into the holders

installed to the thin copper pipe.

(6) Disconnect the 4-pin white connector (CN44).

10 Removing the drain pump (DP) and float switch (FS)

(1) Remove the drain pan. (See Photo 6)
(2) Cut the hose band and remove the hose.
(3) Remove the drain pump assembly (3 screws and 2 hooks).
(4) Remove the drain pump (3 screws).
(5) Remove the float switch (2 screws).

Photo 7

Gas pipe temp. thermistor (TH23)

Liquid pipe temp. thermistor (TH22)

Photo 8

Float switch

Hose band

Drain pump

33

Photo 9

Drain pump
fixing screw

Drain pump
assembly fixing screw

Float switch
fixing screw

OPERATING PROCEDURE

11. Removing the heat exchanger

(1) Remove the drain pan. (See Photo 6)
(2) Remove the 3 screws of the piping cover, and pull out

piping cover.
(3) Remove the 2 screws of coil plate.
(4) Remove the 2 screws of the coil.
(5) Remove the screw of the coil support.
(6) Pull out the heat exchanger.

PHOTOS & ILLUSTRATIONS

Photo 10

Heat exchanger

Coil support

Linear expansion
valve

Piping cover

Heat exchanger
fixing screw

34

35

TM

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

cCopyright 2007 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Nov. 2008 No. OCH421 REVISED EDITION-A PDF 7
Distributed in Jul. 2007 No. OCH421 PDF 9
Made in Japan

New publication, effective Nov. 2008
Specifications subject to change without notice