Mitsubishi PLFY-P08NCMU-E, PLFY-P12NCMU-E, PLFY-P15NCMU-E Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

R410A / R22

Indoor unit [Model names]

PLFY-P08NCMU-E

PLFY-P12NCMU-E

PLFY-P15NCMU-E

[Service Ref.] PLFY-P08NCMU-E.TH PLFY-P08NCMU-E1.TH PLFY-P08NCMU-ER2.TH PLFY-P08NCMU-ER3.TH PLFY-P08NCMU-ER4.TH PLFY-P12NCMU-E.TH PLFY-P12NCMU-E

1.TH

PLFY-P12NCMU-ER2.TH PLFY-P12NCMU-ER3.TH PLFY-P12NCMU-ER4.TH PLFY-P15NCMU-E.TH PLFY-P15NCMU-E

1.TH

PLFY-P15NCMU-ER2.TH PLFY-P15NCMU-ER3.TH PLFY-P15NCMU-ER4.TH

Revision:

• PLFY-P08/12/15NCMU-ER4.TH

• Some descriptions have been

• Please void OCH410

NOTE:

• This manual describes only

April 2012

No. OCH410

REVISED EDITION-D

have been added in REVISED EDITION-D.

modified.

REVISED EDITION-C.

service data of the indoor units.

Model name

indication

INDOOR UNIT

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

9. MICROPROCESSOR CONTROL

10. TROUBLESHOOTING

11. DISASSEMBLY PROCEDURE

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PARTS CATALOG (OCB410)

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9 11 12

15 16 23 30

Use the speciﬁ ed refrigerant only

OCH410D

Never use any refrigerant other than that speciﬁ ed.

Doing so may cause a burst, an explosion, or ﬁ re when the unit is being used, serviced, or disposed of. Correct refrigerant is speciﬁ ed in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.

TECHNICAL CHANGES

PLFY-P08NCMU-ER3.TH PLFY-P08NCMU-ER4.TH PLFY-P12NCMU-ER3.TH PLFY-P12NCMU-ER4.TH PLFY-P15NCMU-ER3.TH PLFY-P15NCMU-ER4.TH

• INDOOR CONTROLLER BOARD (I.B) has been changed. (S/W version up)

PLFY-P08NCMU-ER2.TH PLFY-P08NCMU-ER3.TH PLFY-P12NCMU-ER2.TH PLFY-P12NCMU-ER3.TH PLFY-P15NCMU-ER2.TH PLFY-P15NCMU-ER3.TH

• TURBO FAN and WASHER have been changed.

PLFY-P08NCMU-E1.TH PLFY-P08NCMU-ER2.TH PLFY-P12NCMU-E

1.TH PLFY-P12NCMU-ER2.TH

PLFY-P15NCMU-E1.TH PLFY-P15NCMU-ER2.TH

• The following functions of CONTROLLER BOARD (C.B) have been changed. * Initial setting of auto restart function Not effective → effective (SW1-9 OFF → ON) * External heating control change

PLFY-P08NCMU-E.TH PLFY-P08NCMU-E1.TH PLFY-P12NCMU-E.TH PLFY-P12NCMU-E PLFY-P15NCMU-E.TH PLFY-P15NCMU-E

• PANEL has been changed.

SLP-15AAU (White : 0.70Y 8.59/0.97) → SLP-15AAUW (Pure white : 6.4Y 8.9/0.4)

1.TH

OCH410D

FEATURES

Models

Cooling capacity / Heating capacity

PLFY-P08NCMU-E 8,000 / 9,000 Btu/h PLFY-P12NCMU-E 12,000 / 13,500 Btu/h PLFY-P15NCMU-E 15,000 / 17,000 Btu/h

Indoor Unit

1. PERFECT PANEL SIZE

The brand new 22-7/16 inch PLFY-P08/12/15NCMU-E models are slim, attractive, yet powerful units. PLFY-P08/12/15NCMU-E’s size and shape, which perfectly match 2-by-2 ceilings, and its lighter weight of 34 lbs

(PLFY-P08NCMU-E) make installation even easier and more convenient.

2. 29 dB WHISPER-QUIET OPERATION (PLFY-P08NCMU-E)

Ideal for cafés, bars, restaurants, and shops. Give all your customers the comfortable environment they deserve.

3. 2,500 HOUR LONG LIFE FILTER

Greatly reduces the frequency the filter needs to be replaced, making maintenance all the easier.

4. FRESH AIR INTAKE

Provides indoor air of the highest quality.

5. SMUDGE-FREE AIRFLOW

Reduces annoying drafts and smudging.

6. SLIM UNIT BODY FOR EASY INSTALLATION

The 22-7/16 inch slim body and octagonal shape, which make the distance between bolts only 16-17/32 inch, help installation easy and maintenance trouble-free.

Unit : inch

20-7/8

Suspension bolt pitch

16-17/32

Unit 22-7/16

22-7/16

T-bar

22-11/16

23-5/8

9-1/4

8-3/16

Ceiling surface

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

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 cover

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)

T o return operation number

Ventilation button ( Operation button)

To go to next operation number

Built-in temperature sensor

OCH410D

PART NAMES AND FUNCTIONS

Indoor (Main) Unit

Horizontal Air Outlet Sets horizontal airflow automatically

during cooling or dehumidifying.

Filter Removes dust and pollutants

from return air.

Grille

Auto Air Swing Vane Disperses airflow up and

down and adjusts the angle of airflow direction.

Air Intake Returns air from room.

Wired remote controller

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

Note: The phrase "Wired remote controller" in this manual refers only to the PAR-21MAA. If you need any information for the other remote controller, please refer to either the installation manual or initial setting manual which are included in remote controller's box.

Wired remote controller

OCH410D

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

Shows the direction of the outcoming airflow.

“One Hour Only” indicator

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

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

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

46°F or 102°F

or more.

“Sensor” indication

Displays 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.

OCH410D

SPECIFICATIONS

4-1. SPECIFICATIONS

Item

Power

Cooling capacity

Heating capacity

Cooling

Input

Heating

Cooling

Current

Electric characteristic

(munsell symbol)

Dimensions

Heat exchanger

F a n

Pipe

dimensions

Field drain pipe size Noise level 3 Product weight

Heating

Exterior

Height

Width Depth

Fan × No.

Air flow

DRY

3

WET

External

static pressure

Fan motor

output

Insulator

Air filter

Gas side

Liquid

side

V·Hz Btu/h Btu/h

kW kW

A A

—

in in in —

— CFM CFM

—

PLFY-P08NCMU-E.TH

PLFY-P08NCMU-E

1.TH

PLFY-P08NCMU-ER2.TH PLFY-P08NCMU-ER3.TH PLFY-P08NCMU-ER4.TH

8,000 9,000

0.05

0.23

0.23 Unit : Galvanized sheets with gray heat insulation

Grilles : ABS resin Munsell<0.7Y 8.59/0.97>(PLFY-P·NCMU-E.TH) / <6.4Y 8.9/0.4>(PLFY-P·NCMU-E1/ER2/ER3/ER4.TH)

280-320-350 250-290-320

0.015

29-32-38

34<7>

PLFY-P12NCMU-E.TH

PLFY-P12NCMU-E PLFY-P12NCMU-ER2.TH PLFY-P12NCMU-ER3.TH PLFY-P12NCMU-ER4.TH

Single phase 208/230V 60Hz

Note 1. Rating conditions Cooling : Indoor : D.B. 80°F W.B. 67°F outdoor : D.B. 95°F W.B. 75°F Heating : Indoor : D.B. 70°F outdoor : D.B. 47°F W.B. 43°F Note 2. The number indicated in < > is for the grille.

W 3. Air flow and the noise level are indicated as Low - Medium - High.

12,000 13,500

0.06

0.28

8-3/16<25/32> 22-7/16<25-19/32> 22-7/16<25-19/32>

Cross fin

Turbo fan × 1

Polyethylene sheet

PP honey comb fabric

1/2" 1/4"

O.D1-1/4"

30-34-39

1.TH

320-350-390 290-320-350

PLFY-P15NCMU-E.TH

PLFY-P15NCMU-E1.TH PLFY-P15NCMU-ER2.TH PLFY-P15NCMU-ER3.TH PLFY-P15NCMU-ER4.TH

15,000 17,000

0.06

0.28

0.020

31-35-40

37<7>

4-2. NOISE CRITERION CURVES

OCH410D

PLFY-P08NCMU-E.TH PLFY-P08NCMU-E

1.TH

PLFY-P08NCMU-ER2.TH PLFY-P08NCMU-ER3.TH PLFY-P08NCMU-ER4.TH

APPROXIMATE

THRESHOLD OF

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

HEARING FOR CONTINUOUS NOISE

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NOTCH

High

Medium

Low

SPL(dB)32LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

PLFY-P12NCMU-E.TH PLFY-P12NCMU-E

1.TH

PLFY-P12NCMU-ER2.TH PLFY-P12NCMU-ER3.TH PLFY-P12NCMU-ER4.TH

APPROXIMATE

THRESHOLD OF

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

HEARING FOR CONTINUOUS NOISE

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NOTCH

High

Medium

Low

SPL(dB)34LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

PLFY-P15NCMU-E.TH PLFY-P15NCMU-E

1.TH

PLFY-P15NCMU-ER2.TH PLFY-P15NCMU-ER3.TH PLFY-P15NCMU-ER4.TH

APPROXIMATE

THRESHOLD OF

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

HEARING FOR CONTINUOUS NOISE

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NOTCH

High

Medium

Low

SPL(dB)35LINE

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

UNIT

CEILING

5ft

MICROPHONE

NOTE: The sound level is measured in an anechoic

room where echoes are few, when compressor stops. The sound may be bigger than the indicated level in actual use due to surrounding echoes. The sound level can be higher by about 2 dB than the indicated level during cooling and heating operation.

4-3. ELECTRICAL PARTS SPECIFICATIONS

OCH410D

Service ref.

Parts name

Thermistor (Room temperature detection)

Thermistor (Pipe temperature detection/ Liquid)

Thermistor (Pipe temperature detection/ Gas)

Fuse (Indoor controller board)

Fan motor (with Thermal fuse)

Fan motor capacitor

Vane motor

Drain pump

Symbol

TH21

TH22

TH23

FUSE

PLFY-P08NCMU-E.TH

PLFY-P08NCMU-E PLFY-P08NCMU-ER2.TH PLFY-P08NCMU-ER3.TH PLFY-P08NCMU-ER4.TH

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

6-pole OUTPUT 15W

PK6N15-LA

1.TH

PLFY-P12NCMU-E.TH

PLFY-P12NCMU-E1.TH PLFY-P12NCMU-ER2.TH PLFY-P12NCMU-ER3.TH PLFY-P12NCMU-ER4.TH

250V 6.3A

6-pole OUTPUT 20W

PK6N20-LA

Thermal fuse OFF 284F $ 36F

1.5 × 440V

MSBPC20M13

DC12V 300

PLD-12230ME-1

INPUT 12/10.8W 241/Hr



/phase

PLFY-P15NCMU-E.TH

PLFY-P15NCMU-E1.TH PLFY-P15NCMU-ER2.TH PLFY-P15NCMU-ER3.TH PLFY-P15NCMU-ER4.TH

6-pole OUTPUT 20W

PK6N21-LA

Drain sensor

Linear expansion valve [coil]

Electric heater (Condensation proof)

Power supply terminal block

Transmission terminal block

MA remote controller terminal block

+Note: Refer to WIRING DIAGRAM for the supplied voltage.

LEV

TB2

TB5

TB15

Thermistor resistance 30F/6.3k, 50F/3.9k, 70F/2.5k, 80F/2.0k, 90F/1.6k, 100F/1.3k

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

EDM-40YGME

240V 15W

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

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

(1, 2) Rated to 250V 10A +

OCH410D

4-WAY AIR FLOW SYSTEM

5-1. FRESH AIR INTAKE (Location for installation)

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

Fresh air intake

Fresh air intake hole diagram (Unit : inch)

3 - W1/8 Burring hole

4-21/32

120"

W3-15/16 Burring hole pitch

120"

W2-7/8 (Cut out hole)

Ceiling surface

Refrigerant pipe

Electrical Box

Drain pipe

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

PLFY-P08/12/15NCMU-E.TH PLFY-P08/12/15NCMU-E1.TH PLFY-P08/12/15NCMU-ER2.TH PLFY-P08/12/15NCMU-ER3.TH PLFY-P08/12/15NCMU-ER4.TH

Taking air into the unit

Static pressure : P [in. W.G.%10-2]

20 40 60 80 100 120

-20

-40

-60

-80

-100

-120

NOTE: Fresh air intake amount should be 20% or less of

whole air amount to prevent dew dripping.

Air flow : Q [CFM]

How to read curves

Duct characteristics at site

Curve in the

left graphs

Q…Designed amount of fresh air intake <CFM> A…Static pressure loss of fresh air

intake duct system with air flow amount Q <in. W.G.o10

B…Forced static pressure at air condi-

tioner inlet with air flow amount Q <in. W.G.o10 C…Static pressure of booster fan with

air flow amount Q <in. W.G.o10 D…Static pressure loss increase

amount of fresh air intake duct sys-

tem for air flow amount Q <in. W.G.o10-2> E…Static pressure of indoor unit with

air flow amount Q <in. W.G.o10 Qa…Estimated amount of fresh air

intake without D <CFM>

-2

5-3.

OPERATION IN CONJUNCTION WITH DUCT FAN (BOOSTER FAN)

• Whenever the indoor unit is operating, the duct fun 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 wires.

(*) Use a relay of 1W or smaller.

MB: Electromagnetic switch power relay for duct fan. X: Auxiliary relay (For DC 12V, coil rating : 1.0W or

below)

CN51 on indoor unit board

Indoor unit side

Indoor controller board

Multiple remote controller adapter PAC-SA88HA-E

Connector (5P)

CN51

Be sure to secure insulation

Green

material by tape, etc.

Red

Brown

Multiple remote controller adapter PAC-SA88HA-E

CN51

Yellow

Orange

Installation at site

Be sure to secure insulation material by tape, etc.

Distance between indoor controller board and relay must be within 33ft.

5-4. FIXING HORIZONTAL VANE

OCH410D

Horizontal vane of each air outlet can be fixed according to the environment where it is installed.

Setting procedure

1) Turn off a main power supply (Turn off a breaker).

2) Disconnect the vane motor connector of the direction of the arrow with pressing the unlocking button as shown in figure below.

Insulate the disconnected connector with the plastic tape.

Vane motor

Connector

Unlocking button

Horizontal vane

3) Set a vertical vane of the air outlet, which is to be fixed by the hand slowly within the range in the table below.

Measured standard position of the grille

Horizontal vane

< Specified range >

Up/down airflow

direction

· The vanes can be set between 21mm, 13/16 inch and 30 mm, 1-3/16 inch.

Horizontal 30° Downward 45° Downward 55° Downward 70°

21 mm

13/16 inch

25 mm

31/32 inch

28 mm

1-3/32 inch

30 mm

1-3/16 inch

Caution: Do not set the up/down vanes passed the specified range. Condensation could form and drop from the ceiling, or the unit could malfunction.

OCH410D

OUTLINES AND DIMENSIONS

PLFY-P08NCMU-E.TH PLFY-P12NCMU-E.TH PLFY-P15NCMU-E.TH PLFY-P08NCMU-E

1.TH PLFY-P12NCMU-E1.TH PLFY-P15NCMU-E1.TH

PLFY-P08NCMU-ER2.TH PLFY-P12NCMU-ER2.TH PLFY-P15NCMU-ER2.TH PLFY-P08NCMU-ER3.TH PLFY-P12NCMU-ER3.TH PLFY-P15NCMU-ER3.TH PLFY-P08NCMU-ER4.TH PLFY-P12NCMU-ER4.TH PLFY-P15NCMU-ER4.TH

Unit : inch(mm)

Fresh air intake

Ceiling hole

19/32~1-15/32(15~37)

16-17/32(420)

Suspension bolt pitch

20-7/8(530)

Suspension bolt pitch

22-7/16(570)

13-3/16(335)

Detail drawing of fresh air intake

4-21/32(118)

1(25)

:2-7/8(:73.4)

Cut out hole

120

:3-15/16(:100)

3-:1/8(:2.8)

Burring hole

120

19/32~1-15/32(15~37)

22-11/16~24-13/32(576~620)

7-27/32(199)

2-1/4(57)

19/32~1-15/32(15~37) 19/32~1-15/32(15~37)

2-19/32(66)

3-21/32(93)

4-3/4(121)

2-7/32(56)

21/32(17)

2 1

1-1/2~2-9/32(38~58)

7-15/16(202)

Terminal block

13-27/32(352)

22-11/16~24-13/32(576~620)

13-3/16(335)

9-1/16(230)

Grille

Ceiling hole

Ceiling surface

Drain pipe VP-25 connection (O.D.:1-1/4(:32))

Suspension bolt M10 or W3/8

1-7/32(31)

8-3/16(208)

9-1/4(235)

7-19/32(193)

(27 )

25/32(20)

+3/16

1-1/16

Suspension bolt lower edge

25-19/32(650)

1-3/8(35)

V/M

11-27/32(301) Air outlet hole

Brand label

Grille Drain hole

Ceiling surface

3-7/16(87)

Wiring entry

7-5/32(182)1-7/8(48)

Models

PLFY-P08/12/15NCMU-E.TH PLFY-P08/12/15NCMU-E PLFY-P08/12/15NCMU-ER2.TH PLFY-P08/12/15NCMU-ER3.TH PLFY-P08/12/15NCMU-ER4.TH

1.TH

Refrigerant pipe (1/4 (6.35) dia.) flared connection

Unit : inch(mm)

Refrigerant pipe (1/2 (12.7) dia.) flared connection

2-5/32(55)

11-27/32(301)

25-19/32(650)

Air outlet hole

V/M

14-27/32(377) Air intake hole

1-3/8(35)

2-5/32(55)

V/M

Auto vane

14-27/32(377)

Air intake hole

Air intake grille

Vane motor

+ 23 hidden pages

Mitsubishi PLFY-P08NCMU-E, PLFY-P12NCMU-E, PLFY-P15NCMU-E Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual