Mitsubishi PLFY-P12NAMU-E, PLFY-P30NAMU-E, PLFY-P15NAMU-E, PLFY-P36NAMU-E, PLFY-P18NAMU-E Technical & Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

R410A / R22

August 2006

No. OC340

REVISED EDITION-A

[Models]

PLFY-P12NAMU-E
PLFY-P15NAMU-E
PLFY-P18NAMU-E
PLFY-P24NAMU-E
PLFY-P30NAMU-E
PLFY-P36NAMU-E

INDOOR UNIT

Revision:

• RoHS PARTS LISTis added.

• Some descriptions have been
modified.

• Please void OC340.

NOTE:

• This manual describes only

service data of the indoor
units.

• RoHS compliant products have

<G> mark on the spec name
plate.

• For servicing of RoHS compli-

ant products, refer to the RoHS
PARTS LIST.

CONTENTS

1. FEATURES ····························································· 2

2. PART NAMES AND FUNCTIONS ························· 3

3. SPECIFICATIONS·················································· 5

4. 4-WAY AIR FLOW SYSTEM ·································· 8

5. OUTLINES AND DIMENSIONS····························· 11

6. WIRING DIAGRAM ················································ 12

7.

REFRIGERANT SYSTEM DIAGRAM

8. MICROPROCESSOR CONTROL·························· 14

9. TROUBLE SHOOTING ·········································· 21

10. DISASSEMBLY PROCEDURE ······························ 26

11. PARTS LIST ··························································· 29

12. RoHS PARTS LIST ················································ 32

13. OPTIONAL PARTS················································· 35

······················· 13

1

33-7/16

Unit:in.

FEATURES

Indoor Unit

Models Cooling capacity / Heating capacity

PLFY-P12NAMU-E 12,000 / 13,500 Btu/h
PLFY-P15NAMU-E 15,000 / 17,000 Btu/h
PLFY-P18NAMU-E 18,000 / 20,000 Btu/h
PLFY-P24NAMU-E 24,000 / 27,000 Btu/h
PLFY-P30NAMU-E 30,000 / 34,000 Btu/h
PLFY-P36NAMU-E 36,000 / 40,000 Btu/h

1. SPACE-SAVING CENTRALLY LOCATED CEILING RECESSED INSTALLATION

2. 4-WAY AIR FLOW SYSTEM

This series allows you to select from 2, 3, and 4 way air flow directions according to your requirement. As a result, you get
superb flexibility in choosing a configuration that gives you maximum cooling/heating efficiency in a neat and unobstructive
installation.

3. DRAIN PUMP FOR EASY PIPE CONNECTION (DRAIN LIFT-UP MECHANISM)

This mechanism, with its capacity to raise drain water 33-7/16 inch above the ceiling line, is convenient for removing water
and avoiding piping contact with beams, etc.

4. FRESH AIR INTAKE AND BRANCH DUCTING ARE AVAILABLE (on-site work)

5. HIGH RELIABILITY AND EASY SERVICING.

2

2

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

Grille

Filter
Removes dust and pollutants
from return air

Horizontal Air Outlet
Sets airflow horizontal automatically
during cooling or dehumidifying.

Air Intake
Returns air from room.

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

MENU

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

Set Temperature 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
door.

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 preceding operation
number.

Ventilation button
(

Operation button)

To next operation number.

PART NAMES AND FUNCTIONS

● Indoor (Main) Unit

● Remote controller

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

● Operation buttons

3

● Display

For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.

˚F˚C

˚F˚C

ERROR CODE

AFTER

TIMER

TIME SUN MON TUE WED THU FRI SAT

ON
OFF

Hr
AFTER

FILTER

FUNCTION

ONLY1Hr.

WEEKLY

SIMPLE

AUTO OFF

Identifies the current operation

Shows the operating mode, etc.
* Multilanguage display is sup-

ported.

“Centrally Controlled” indicator

Indicates that operation of 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, shows the time
remaining.

“Sensor” indication

Displayed when the remote controller
sensor is used.

“Locked” indicator

Indicates that remote controller but­tons have been locked.

“Clean The Filter” indicator

Comes on when it is time to clean the
filter.

Timer indicators

The indicator comes on if the corre­sponding timer is set.

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 and downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off after one
hour, at which time the airflow di­rection also changes.

Room Temperature display

Shows the room temperature.

Louver display

Indicates the action of the swing
louver. Does not appear if the
louver is stationary.

(Power On indicator)

Indicates that the power is on.

Fan Speed indicator

Shows the selected fan speed.

Ventilation indicator

Appears when the unit is running in
Ventilation mode.

Caution

● Only the Power on indicator lights when the unit is stopped and power supplied to the unit.

● If you press a button for a feature that is not installed at the indoor unit, the remote controller will display the “Not Available”

message.
If you are using the remote controller to drive multiple indoor units, this message will appear only if the feature is not pre­sent at every unit connected.

● When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indica­tion (For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappear then start the operation.

4

3

Item

Btu/h
Btu/h

kW
kW

A
A

—

in
in

in
—
—

CFM
CFM

Pa

kW

—
—

in

in

in

dB

lb

Cooling capacity

Power

Heat exchanger

Insulator

Air filter

Fan ✕ No

Pipe

dimensions

Unit drain pipe size
Noise level W3
Product weight

Exterior

(munsell symbol)

Fan motor

output

External

static pressure

Liquid

side

Gas
side

Heating capacity

F

a

n

Dimensions

Height

Width
Depth

Electric characteristic

Input

Cooling
Heating
Cooling
Heating

Current

PLFY-P12NAMU-E

PLFY-P18NAMU-E PLFY-P24NAMU-E PLFY-P30NAMU-E PLFY-P36NAMU-E

12,000
13,500

0.14

0.14

0.68

0.68

390-420-460-490
350-380-410-440

24-27-28-30

18,000
20,000

0.14

0.14

0.68

0.68

490-530-570-640
470-500-530-600

27-28-31-33

PLFY-P15NAMU-E

15,000
17,000

0.14

0.14

0.68

0.68

420-460-490-570
380-410-470-530

27-28-30-32

30,000
34,000

0.27

0.27

1.30

1.30

710-810-920-990
670-770-870-930

3/8"

34-36-40-41

36,000
40,000

0.27

0.27

1.30

1.30

780-880-990-1060
730-830-930-1000

5/8" / 3/4"

(Compatible)

37-40-43-44

24,000
27,000

0.14

0.14

0.68

0.68

530-570-640-710
500-530-600-670

PVC with O.D.1-1/4"

28-30-33-34

Single phase 208/230V 60Hz

V

·Hz

11-3/4<1-3/16>

0.110

5/8"

53<11>

66<11>

Air flow
W3

DRY
WET

Unit : Galvanized sheets with gray heat insulation Grills : ABS resin Munsell<0.70Y 8.59/0.97>

33-1/16<37-3/8>
33-1/16<37-3/8>

Cross fin

Turbo fan ✕ 1

0

Polyethylene sheet

PP honey comb fabric

10-3/16<1-3/16>

0.070

1/2"
1/4"

49<11>

1/2" / 5/8"

(Compatible)

1/4" / 3/8"

(Compatible)

SPECIFICATIONS

3-1. SPECIFICATIONS

Note 1. Rating conditions

Note 2. The number indicated in < > is just for the grille.

W 3. Air flow and the noise level are indicated as Low - Medium2 - Medium1 - High.

Cooling : Indoor : D.B. 80_F W.B. 67_F

Heating : Indoor : D.B. 70_F

outdoor : D.B. 95_F W.B. 75_F
outdoor : D.B. 47_F W.B. 43_F

5

3-2. NOISE CRITERION CURVES

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

PLFY-P12NAMU-E

High
Medium1
Medium2

Low

NOTCH

30
28
27
24

SPL(dB)

LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

PLFY-P18NAMU-E

High
Medium1
Medium2

Low

NOTCH

33
31
28
27

SPL(dB)

LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

PLFY-P24NAMU-E

High
Medium1
Medium2

Low

NOTCH

34
33
30
28

SPL(dB)

LINE

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

PLFY-P15NAMU-E

High
Medium1
Medium2

Low

NOTCH

32
30
28
27

SPL(dB)

LINE

6

PLFY-P30NAMU-E

90

NOTCH

High
Medium1
Medium2

Low

SPL(dB)

41
40
36
34

LINE

PLFY-P36NAMU-E

90

NOTCH

High
Medium1
Medium2

Low

SPL(dB)

44
43
40
37

LINE

80

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

HEARING FOR
CONTINUOUS
NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

UNIT

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

80

70

60

50

40

30

APPROXIMATE

20

THRESHOLD OF

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

HEARING FOR
CONTINUOUS
NOISE

10

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

CEILING

5ft

MICROPHONE

Ambient temperature 80˚F

7

3-3. ELECTRICAL PARTS SPECIFICATIONS

Parts name

Model

Symbol

TH21

TH22

TH23

FUSE

MF

C

MV

DP

DS

LEV

H2

TB2

TB5

TB15

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"

250V 6A

240V 21.8W

(L1, L2, GR) 330V 30A

(M1, M2, S) 250V 20A

(1, 2) 250V 10A

Liquid pipe thermistor

Gas pipe thermistor

Fan motor capacitor

Vane motor

Drain-up mechanism

Drain sensor

Linear expansion valve

PLFY-P12NAMU-E PLFY-P18NAMU-EPLFY-P15NAMU-E PLFY-P24NAMU-E PLFY-P30NAMU-E PLFY-P36NAMU-E

Room temperature
thermistor

Fuse
(Indoor controller board)

Fan motor
(with inner-thermostat)

Electric heater
(Condensation proof)

Power supply terminal
block

Transmission terminal
block

MA remote controller
terminal block

6-pole OUTPUT 110W D176P110MS

Inner-thermostat OPEN 266°F i 9_F

6-pole OUTPUT 70W D17D6P70MS

MSBPC20M13

DC12V 300

"

/phase

PLD-12220ME-2

INPUT 12/10.8W 24R/Hr

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

DC12V Stepping motor drive port

dimension [

5.2

(0~2000pulse)

EDM-80YGME

3.0+ ✕ 440V

7.0+ ✕ 440V

Blowout direction

pattern

4-direction<Table 1> 3-direction 2-direction Note1.

For 3 and 2-directional,
please use the air outlet
shutter plate (option).

Pattern 1 Factory setting Pattern 4 One air outlet

fully closed

Pattern 6 Two air outlet

fully closed

4

4-1. PLACEMENT OF THE AIR OUTLETS

4-WAY AIR FLOW SYSTEM

• For this grille, the blowout direction comes in 11 patterns.
Also, by setting the dip switches (SWA and SWB) on the address board to the appropriate settings, you can adjust the air
flow and speed. Select the settings from Table according to the location in which you want to install the unit.

1) Decide on the pattern of the airflow direction.

8

1

Standard

8.9

9.8

10.8

2

High ceiling 1

9.8

10.8

11.5

(Unit : feet)

(Unit : feet)

3

High ceiling 2

11.5

11.5
—

4 direction
3 direction
2 direction

SWA

SWB

PLFY-P12, P15, P18NAMU-E

PLFY-P24, P30, P36NAMU-E

4
3
2

1

Standard

10.5

11.8

13.1

2

High ceiling 1

11.8

13.1

13.8

3

High ceiling 2

13.8

13.8
—

4 direction
3 direction
2 direction

SWA

SWB

4
3
2

2) According to the number of air outlets and height of the ceiling to install the unit, be sure to set up the switches

Fresh air intake hole

Fresh air intake hole diagram (Unit : inch)

3 - {1/8
Burring hole

{4-29/32
Burring hole pitch

{3-15/16
(Cut out hole)

Refrigerant pipe Drain pipe

Ceiling surface

120

_

120_

w6-7/32

CN51

Multiple remote
controller adapter
PAC-SA88HA-E

Indoor controller board

Distance between indoor
controller board and relay
must be within 10m.

Be sure to secure insulation
material by tape and such

5

Green

Yellow

Orange

Connector (5P)

Indoor unit side

Multiple remote
controller adapter
PAC-SA88HA-E

Be sure to secure insulation
material by tape and such

Installation at site

CN51
on
indoor unit
board

Red

Brown

1

~

CN51

MB

(SWA, SWB) on the indoor board to the appropriate setting.

• Correspondence of ceiling heights to numbers of air outlets.

(208V)

(230V)

22

11

4-2. FRESH AIR INTAKE (INSTALLATION OF SITE)

• At the time of installation, use the duct holes (cutout) located at the positions shown in following diagram, as and when required.
Note :

Be sure to add5-5/16inch to the dimensions in the diagram that are marked with a “w” if installing a multi function

casement (Option)

4-3. INTERLOCKING OPERATION

METHOD 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 lines.

(w)Use a relay under 1W.
MB: Electromagnetic switch power relay for duct fan.

X: Auxiliary relay (12V DC LY-1F)

9

Static pressure [in. W.G.]

Air flow [CFM]

2.0
50 100 150 200

0.2

0.4

0.6

0.8

0

2 intakes

1 intake

2 intakes

1 intake

Static pressure [in. W.G.]

Air flow [CFM]

2.0
50 100 150 200

0.2

0.4

0.6

0.8

0

Static pressure [in. W.G.]

Air flow [CFM]

2.0
50 100 150 200

0.2

0.4

0.6

0.8

0

Air flow
[CFM]

2 intakes

1 intake

Static pressure [in. W.G.]

2.0
50 100 150 200 250 300

0.2

0.4

0.6

0.8

0

Air flow
[CFM]

2 intakes

1 intake

Static pressure [in. W.G.]

2.0
50 100 150 200 250 300

0.2

0.4

0.6

0.8

0

Air flow [CFM]

Static pressure [in. W.G.]

2.0
50 100 150 200 250 300

0.2

0.4

0.6

0.8

0

4-4. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS

Q

0

B

A

C

1

Curve in the
left graphs.

Duct characteristics
at site

Q

A

EC

2

Q

Qa

AD

3

ll

PLFY-P12 /P15 /P18 /P24NAMU-E

Multifunction casement + Standard filter

Multifunction casement + High efficiency filter

Taking air into the unit

22

PLFY-P30 /P36NAMU-E

How to read curves

Q…Planned amount of fresh air intake
A…Static pressure loss of fresh air

intake duct system with air flow
amount Q

B…Forced static pressure at air condi-

tioner inlet with air flow amount Q

C…Static pressure of booster fan with

air flow amount Q

D…Static pressure loss increase

amount of fresh air intake duct sys­tem for air flow amount Q

E…Static pressure of indoor unit with air

flow amount Q

Qa…Estimated amount of fresh air

intake with out D <CFM>

Multifunction casement + Standard filter Multifunction casement + High efficiency filter

<CFM>

<in.W.G.>

<in.W.G.>
<in.W.G.>

<in.W.G.>
<in.W.G.>

Taking air into the unit

10

5

OUTLINES AND DIMENSIONS

PLFY-P12NAMU-E PLFY-P24NAMU-E
PLFY-P15NAMU-E PLFY-P30NAMU-E
PLFY-P18NAMU-E PLFY-P36NAMU-E

Branch duct hole

3-15/16(100)

[6-7/8([175)

3-[1/8([2.8)
Burring hole

[4-29/32([125)

6-7/32(158)

3-17/32(90)

3-15/16(100)

°

70

13-25/32(350)

Detail drawing of fresh air intake

120

°

(Cut out hole)

3-17/32(90)

3-15/16(100)

14-[1/8([2.8)
Burring hole

[5-29/32([150)

°

120

[3-15/16([100)

(Cut out hole)

Ceiling surface

High efficiency filter
& Fresh air intake casement(option)

5-1/8(130)

6-3/32(155)

0

+5

5-5/16(135)

0

+3/16

11/16 (17 )

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

Fresh air intake

6-9/16(167)

Branch duct hole

33-1/16(840)

7-9/16(192)

Suspension
bolt
lower edge

6-1/4(159)

3-27/32(98)

C

Suspension bolt
W3/8(M10)

1

2

6-11/16(170)

5-1/2(140)

(50~70)

1-31/32~2-3/4

6-1/4(159)

D

7-3/4(197)

2-3/8(60)

Wiring entrance holes

1-1/2(37)
Air intake grille

Ceiling hole

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

31-7/8(810)

Suspension bolt pitch

Terminal block

33-1/16(840)

Feeding hole
(Drain pump)

11-1/4(286)

14-23/32(374)

2-[1-1/16(27)

9-3/4(248)1-3/4(45)

22-23/32(577)

Air intake hole

M

6-1/4(159)

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

Ceiling surface

Grille

Drain hole

M

1(26)

6-1/4(159)

4-1/8(105)

7-15/32(190)

Auto vane

Unit : in(mm)

(20~45)

25/32~1-25/32

Ceiling hole

23-13/16(605)

Suspension bolt pitch

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

(20~45)

25/32~1-25/32

A

B

0

+5

0

+3/16

1-3/16(30)

11/16 (17 )

Branch
duct
hole

Models

PLFY-P12NAMU-E
PLFY-P15NAMU-E

PLFY-P18NAMU-E

PLFY-P24NAMU-E

PLFY-P30NAMU-E

PLFY-P36NAMU-E

37-3/8(950)

3-1/32(77)

2(51)

1 Liquid Pipe

1/4F

([6.35)

1/4F / 3/8F

([6.35/[9.52)

(Compatible)

3/8F

([9.52)

11

16-3/16(411)

Air outlet hole

M

2 Gas Pipe

1/2F

([12.7)

1/2F / 5/8F

([12.7/[15.88)

(Compatible)

5/8F

([15.88)

5/8F / 3/4F

([15.88/[19.05)

(Compatible)

16-3/16(411)

Air outlet hole

37-3/8(950)

A

9-1/2
(241)

11-1/16
(281)

M

Unit : inch (mm)

B

3-11/32
(85)

10-3/16
(258)

3-1/2
(89)

11-3/4
(298)

C

22-23/32(577)

Vane motor
2(51)

3-1/32(77)

D

3
(76)

3-5/32
(80)

3-5/16
(84)

Air intake hole