Mitsubishi Electric Mr. Slim PLA-A12BA4 Manuel utilisateur

SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SPLIT-TYPE, AIR CONDITIONERS

CONTENTS

1. REFERENCE MANUAL........................ 2

2. SAFETY PRECAUTION........................ 3

3. PART NAMES AND FUNCTIONS ........ 5

4. SPECIFICATIONS................................. 8

5. NOISE CRITERION CURVES............. 10

6. OUTLINES AND DIMENSIONS............12

7. WIRING DIAGRAM............................. 13

REFRIGERANT SYSTEM DIAGRAM

...... 14

9. TROUBLESHOOTING ........................ 15

10. SPECIAL FUNCTION ......................... 29

11. DISASSEMBLY PROCEDURE ........... 32

NOTE:

• This manual describes only

service data of the indoor units.

• RoHS compliant products have

<G> mark on the spec name

plate.

PARTS CATALOG (OCB482)

WIRED REMOTE

CONTROLLER

(Option)

IR WIRELESS REMOTE

CONTROLLER

(Option)

ON/OFF TEMP

ON/OFF

TEMP.

INDOOR UNIT

Model name

indication

No. OCH482

November 2010

PLA-A12BA4

PLA-A18BA4

PLA-A24BA4

PLA-A30BA4

PLA-A36BA4

PLA-A42BA4

PLA-A12BA4

PLA-A18BA4

PLA-A24BA4

PLA-A30BA4

PLA-A36BA4

PLA-A42BA4

Indoor unit

[Model names] [Service Ref.]

33223

1REFERENCE MANUAL

OUTDOOR UNIT SERVICE MANUAL

Model name Service Ref. Service Manual No.

PUZ-A18/24/30/36/42NHA4 PUZ-A18/24/30/36/42NHA4

OCH481

OCB481

PUZ-A18/24/30/36/42NHA4-BS PUZ-A18/24/30/36/42NHA4-BS

PUY-A12/18/24/30/36/42NHA4 PUY-A12/18/24/30/36/42NHA4

PUY-A12/18/24/30/36/42NHA4-BS PUY-A12/18/24/30/36/42NHA4-BS

Radio frequency interface Wired remote controller IR wireless remote controller

ON/OFF

TEMP.

COOL

DRY

AUTO

FAN

HEAT

RF thermostat

Remote controller (Optional parts)

SAFETY PRECAUTION

Cautions for units utilising refrigerant R410A

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

Use new refrigerant pipes.

Store the piping to be used indoors during

installation, and keep both ends of the piping

sealed until just before brazing. (Leave elbow

joints, etc. in their packaging.)

Charge refrigerant from liquid phase of gas

cylinder.

If the refrigerant is charged from gas phase, composition

change may occur in refrigerant and the efficiency will be

lowered.

Do not use refrigerant other than R410A.

If other refrigerant (R22 etc.) is used, chlorine in refrige-

rant can cause deterioration of refrigerant oil etc.

Use a vacuum pump with a reverse flow check

valve.

Vacuum pump oil may flow back into refrigerant cycle and

that can cause deterioration of refrigerant oil etc.

Use the following tools specifically designed for

use with R410A refrigerant.

The following tools are necessary to use R410A refrigerant.

Handle tools with care.

If dirt, dust or moisture enters into refrigerant cycle, that can

cause deterioration of refrigerant oil or malfunction of com-

pressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigera-

nt will change and the efficiency will be lowered.

Flare tool

Electronic refrigerant

charging scale

Vacuum pump adaptor

Size adjustment gauge

Gauge manifold

Torque wrench

Gas leak detector

Charge hose

Tools for R410A

Contamination inside refrigerant piping can cause deterio-

ration of refrigerant oil etc.

If dirt, dust or moisture enters into refrigerant cycle, that can

cause deterioration of refrigerant oil or malfunction of com-

pressor.

If large amount of mineral oil enters, that can cause deterio-

ration of refrigerant oil etc.

The refrigerant oil applied to flare and flange

connections must be ester oil, ether oil or

alkylbenzene oil in a small amount.

Make sure that the inside and outside of refrige-

rant piping is clean and it has no contaminants

such as sulfur, oxides, dirt, shaving particles, etc,

which are hazard to refrigerant cycle.

In addition, use pipes with specified thickness.

Ventilate the room if refrigerant leaks during

operation. If refrigerant comes into contact with

a flame, poisonous gases will be released.

2-1. ALWAYS OBSERVE FOR SAFETY

Before obtaining access to terminal, all supply

circuits must be disconnected.

Gravimeter

Unit

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

[2] Additional refrigerant charge

When charging directly from cylinder

· Check that cylinder for R410A on the market is syphon type.

· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

[1] Cautions for service

(1) Perform service after recovering the refrigerant left in the unit completely.

(2) Do not release refrigerant in the air.

(3) After completing service, charge the cycle with specified amount of refrigerant.

(4) When performing service, install a filter drier simultaneously.

Be sure to use a filter drier for new refrigerant.

No. Tool name Specifications

1Gauge manifold · Only for R410A

· Use the existing fitting specifications. (UNF1/2)

· Use high-tension side pressure of 5.3MPa·G or over.

2Charge hose · Only for R410A

· Use pressure performance of 5.09MPa·G or over.

3Electronic scale —

4Gas leak detector · Use the detector for R134a, R407C or R410A.

5Adaptor for reverse flow check · Attach on vacuum pump.

6Refrigerant charge base —

7Refrigerant cylinder · Only for R410A · Top of cylinder (Pink)

· Cylinder with syphon

8Refrigerant recovery equipment —

3PART NAMES AND FUNCTIONS

Drain pipe

Filter

Vane

Gas pipe

Liquid pipe

Air outlet

i-see sensor

(option)

Air intake

(Intake grille)

°F°C

ERROR CODE

AFTER

TIMER

TIME SUN MON TUE WED THU FRI SAT

OFF

AFTER

FILTER

FUNCTION

ONLY1Hr.

WEEKLY

SIMPLE

AUTO OFF

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

•

Display Section

For purposes of this explanation,

all parts of the display are shown.

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 prohib-

ited 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.

“Sensor” indication

Displays when the remote controller

sensor is used.

“Locked” indicator

Indicates that remote controller but-

tons 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 corre-

sponding timer is set.

Up/Down Air Direction indica-

tor

The indicator shows the direc-

tion of the outcoming airflow.

“One Hour Only” indicator

Room Temperature display

Shows the room temperature. The room

temperature display range is 46–102˚F.

The display blinks if the temperature

is less than 46˚F or 102˚F or more.

Louver display

Indicates the action of the swing louver.

Does not appear if the louver is not

running.

(Power On indicator)

Indicates that the power is on.

Fan Speed indicator

Shows the selected fan speed.

Ventilation indicator

Appears when the unit is running in

Ventilation mode.

Operation Section

Temperature setting buttons

Down

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)

To return operation

number

Ventilation button

( Operation button)

To go to next operation

number

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.

Built-in temperature sensor

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 1 hour,

when the airflow direction

also changes.

Wired remote controller (Option)

IR wireless remote controller (Option)

ON/OFF TEMP

FAN

VANE

TEST RUN

AUTO STOP

AUTO START

min

LOUVER

MODE

CHECK

RESETSET CLOCK

MODEL

SELECT

NOT AVAILABLE

SWING

CHECK

FAN

TEST

RUN

°F

°C

AMPMSTOP

START

AMPM

COOL

DRY

AUTO

FAN

HEAT

VANE CONTROL button

Changes the air flow direction.

CLOCK button

RESET button

SET button

ON/OFF button

The unit is turned ON and OFF alternately

each time the button is pressed.

LOUVER button

Changes left / right airflow direction.

(Not available for this model.)

MODE SELECT button

Switches the operation mode between

COOLING/DRY/FAN/HEATING and AUTO

mode.

+In case the outdoor unit is cooling only

type, the heating and auto mode are not

available.

CHECK-TEST RUN button

Performs an inspection check or test

operation. Do not use it for normal

operation.

FAN SPEED SELECT button

Changes the fan speed.

TIMER display

Displays when in timer operation or when

setting timer.

button

Sets any desired room temperature.

CLOCK display

Displays the current time.

“” “ ” display

Displays the order of timer operation.

“ ” “ ” display

Displays whether timer is on or off.

Buttons used to set the “hour and minute” of

the current time and timer settings.

"h" and "min" buttons

Temperature setting display

Indicates the desired temperature setting

which is set.

display

Displays selected fan speed.

display

The vertical direction of airflow is indicated.

display

Blinks when model is selected.

display

Lights up while the signal is transmitted to

the indoor unit when the button is pressed.

display

Indicate that the unit is being checked or

test-run.

OPERATION MODE display

Indicates which operation mode is in effect.

TIMER CONTROL buttons

AUTO STOP (OFF timer): when this switch

is set, the air conditioner will be

automatically stopped at the preset time.

AUTO START (ON timer): when this switch is

set, the air conditioner will be automatically

started at the preset time.

MODEL SELECT

CHECK

TEST RUN

Service Ref.

Power supply (phase, cycle, voltage)

Max. Fuse Size

Min. Circuit Ampacity

External finish (Panel)

Heat exchanger

Fan Fan (drive)

No.

Fan motor output

Fan motor

Airflow (Low-Medium2-Medium1-High)

External static pressure

Booster heater

Operation control & Thermostat

Noise level (Low-Medium2-Medium1-High)

Field drain pipe O.D.

Dimensions

Weight

Single phase,60Hz, 208/230V

Munsell 6.4Y 8.9/0.4

Plate fin coil

Turbo fan (direct) %1

0.05

0.51

Dry: 12-14-16-18(420-490-570-640)

Wet:11-13-15-17(390-460-530-600)

0(direct blow)

–

Remote controller & built-in

28-29-31-32

32 (1-1/4)

PLA-A18BA4

UNIT : 840 (33-1/16) PANEL : 950 (37-3/8)

UNIT : 258 (10-3/16) PANEL : 35 (1-3/8)

UNIT : 22 (49) PANEL: 6 (13)

F.L.A.

*/min(CFM)

Pa(mmAq)

mm(in.)

kg(lbs)

INDOOR UNIT

Single phase,60Hz, 208/230V

Munsell 6.4Y 8.9/0.4

Plate fin coil

Turbo fan (direct) %1

0.05

0.51

Dry: 11-12-13-15(390-420-460-530)

Wet: 10-11-12-14(350-390-420-490)

0(direct blow)

–

Remote controller & built-in

27-28-29-31

32 (1-1/4)

F.L.A.

*/min(CFM)

Pa(mmAq)

mm(in.)

kg(lbs)

Service Ref.

Power supply (phase, cycle, voltage)

Max. Fuse Size

Min. Circuit Ampacity

External finish (Panel)

Heat exchanger

Fan Fan (drive)

No.

Fan motor output

Fan motor

Airflow (Low-Medium2-Medium1-High)

External static pressure

Booster heater

Operation control & Thermostat

Noise level (Low-Medium2-Medium1-High)

Field drain pipe O.D.

Dimensions

Weight

INDOOR UNIT

PLA-A12BA4

UNIT : 840 (33-1/16) PANEL : 950 (37-3/8)

UNIT : 258 (10-3/16) PANEL : 35 (1-3/8)

UNIT : 22 (49) PANEL: 6 (13)

SPECIFICATIONS

PLA-A24BA4

UNIT : 840 (33-1/16) PANEL : 950 (37-3/8)

UNIT : 258 (10-3/16) PANEL : 35 (1-3/8)

UNIT : 23 (51) PANEL: 6 (13)

Single phase,60Hz, 208/230V

Munsell 6.4Y 8.9/0.4

Plate fin coil

Turbo fan (direct) %1

0.05

0.51

Dry: 12-14-16-18(420-490-570-640)

Wet: 11-13-15-17(390-460-530-600)

0(direct blow)

–

Remote controller & built-in

28-29-31-32

32(1-1/4)

F.L.A.

*/min(CFM)

Pa(mmAq)

mm(in.)

kg(lbs)

INDOOR UNIT

Service Ref.

Power supply (phase, cycle, voltage)

Max. Fuse Size

Min. Circuit Ampacity

External finish (Panel)

Heat exchanger

Fan Fan (drive)

No.

Fan motor output

Fan motor

Airflow (Low-Medium2-Medium1-High)

External static pressure

Booster heater

Operation control & Thermostat

Noise level (Low-Medium2-Medium1-High)

Field drain pipe O.D.

Dimensions

Weight

UNIT : 840 (33-1/16) PANEL : 950 (37-3/8)

UNIT : 298 (11-3/4) PANEL : 35 (1-3/8)

UNIT : 25 (55) PANEL : 6 (13)

PLA-A36BA4

Single phase,60Hz, 208/230V

Munsell 6.4Y 8.9/0.4

Plate fin coil

Turbo fan (direct) %1

0.12

1.00

Dry: 20-23-26-30(710-810-920-1060)

Wet: 19-22-25-29(670-770-880-1030)

0(direct blow)

–

Remote controller & built-in

32-34-37-40

32(1-4)

F.L.A.

*/min(CFM)

Pa(mmAq)

mm(in.)

kg(lbs)

Service Ref.

Power supply (phase, cycle, voltage)

Max. Fuse Size

Min. Circuit Ampacity

External finish (Panel)

Heat exchanger

Fan Fan (drive)

No.

Fan motor output

Fan motor

Airflow (Low-Medium2-Medium1-High)

External static pressure

Booster heater

Operation control & Thermostat

Noise level (Low-Medium2-Medium1-High)

Field drain pipe O.D.

Dimensions

Weight

INDOOR UNIT

Service Ref.

Power supply (phase, cycle, voltage)

Max. Fuse Size

Min. Circuit Ampacity

External finish (Panel)

Heat exchanger

Fan Fan (drive)

No.

Fan motor output

Fan motor

Airflow (Low-Medium2-Medium1-High)

External static pressure

Booster heater

Operation control & Thermostat

Noise level (Low-Medium2-Medium1-High)

Field drain pipe O.D.

Dimensions

Weight

PLA-A30BA4

UNIT : 840 (33-1/16) PANEL : 950 (37-3/8)

UNIT : 258 (10-3/16) PANEL : 35 (1-3/8)

UNIT : 23 (51) PANEL: 6 (13)

Single phase,60Hz, 208/230V

Munsell 6.4Y 8.9/0.4

Plate fin coil

Turbo fan (direct) %1

0.05

0.51

Dry: 14-16-18-21(490-570-640-740)

Wet: 13-15-17-20(460-530-600-710)

0(direct blow)

–

Remote controller & built-in

28-30-32-34

32(1-1/4)

F.L.A.

*/min(CFM)

Pa(mmAq)

mm(in.)

kg(lbs)

INDOOR UNIT

UNIT : 840 (33-1/16) PANEL : 950 (37-3/8)

UNIT : 298 (11-3/4) PANEL : 35 (1-3/8)

UNIT : 25 (55) PANEL : 6 (13)

PLA-A42BA4

Single phase,60Hz, 208/230V

Munsell 6.4Y 8.9/0.4

Plate fin coil

Turbo fan (direct) %1

0.12

1.00

Dry: 22-25-28-31(780-880-990-1090)

Wet: 21-24-27-30(740-850-950-1060)

0(direct blow)

–

Remote controller & built-in

34-36-39-41

32(1-1/4)

F.L.A.

*/min(CFM)

Pa(mmAq)

mm(in.)

kg(lbs)

INDOOR UNIT

Service Ref.

Power supply (phase, cycle, voltage)

Max. Fuse Size

Min. Circuit Ampacity

External finish (Panel)

Heat exchanger

Fan Fan (drive) %No.

Fan motor output

Fan motor

Airflow (Low-Medium2-Medium1-High)

External static pressure

Booster heater

Operation control & Thermostat

Noise level (Low-Medium2-Medium1-High)

Field drain pipe O.D.

Dimensions

Weight

5NOISE CRITERION CURVES

PLA-A12BA4 PLA-A18BA4

NOTCH SPL(dB) LINE

High 31

Medium1 29

Medium2 28

Low 27

NOTCH SPL(dB) LINE

High 32

Medium1 31

Medium2 29

Low 28

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 (0 dB = 0.0002 bar)

BAND CENTER FREQUENCIES, Hz

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

BAND CENTER FREQUENCIES, Hz

PLA-A24BA4 PLA-A30BA4

NOTCH SPL(dB) LINE

High 32

Medium1 31

Medium2 29

Low 28

NOTCH SPL(dB) LINE

High 34

Medium1 32

Medium2 30

Low 28

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

BAND CENTER FREQUENCIES, Hz

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

BAND CENTER FREQUENCIES, Hz

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

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