Mitsubishi Electronics PCA-A24GA User Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

ON/OFF

TEMP.

3 3 2 2 3

SPLIT-TYPE, AIR CONDITIONERS

SERVICE MANUAL

Indoor unit [Model names] [Service Ref.]

PCA-A24GA

PCA-A30GA

PCA-A36GA

PCA-A42GA

PCA-A24GA PCA-A24GA PCA-A30GA PCA-A30GA PCA-A36GA PCA-A36GA PCA-A42GA PCA-A42GA

June 2007

No. OC368

REVISED EDITION-B

Revision:

• WIRING DIAGRAM has been changed in REVISED EDITION-B.

• Some descriptions have been modified.

• Please void OC368 REVISED

EDITION-A.

NOTE:

• This manual describes only service data of the indoor units.

• RoHS compliant products have <G> mark on the spec name plate.

• For servicing RoHS compliant products, refer to the RoHS PARTS LIST.

INDOOR UNIT

REMOTE CONTROLLER

Model name indication

CONTENTS

1. TECHNICAL CHANGES ··································2

2. REFERENCE MANUAL······································2

3. SAFETY PRECAUTION···································3

4. PART NAMES AND FUNCTIONS ···················5

5. SPECIFICATIONS············································8

6. NOISE CRITERION CURVES··························9

7. OUTLINES AND DIMENSIONS·····················10

WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

10. TROUBLESHOOTING ···································14

11. DISASSEMBLY PROCEDURE ·······················26

12. PARTS LIST···················································31

13. RoHS PARTS LIST ········································34

············································12

··················13

Series (Outdoor unit)

PUZ-A·NHA PUZ-A·NHA-BS PUY-A·NHA PUY-A·NHA-BS

Manual No.

OCS04

TECHNICAL CHANGES

PCA-A24GA

PCA-A30GA ➔ PCA-A30GA1 PCA-A36GA ➔ PCA-A36GA1 PCA-A42GA ➔ PCA-A42GA1

• Indoor controller board has been changed.

2-1. OUTDOOR UNIT SERVICE MANUAL

Service Ref.

➔ PCA-A24GA1

REFERENCE MANUAL

Service Manual No.

PUZ-A18/24/30/36/42NHA PUZ-A18/24/30/36/42NHA-BS PUY-A12/18/24/30/36/42NHA(1) PUY-A12/18/24/30/36/42NHA(1)-BS

2-2. TECHNICAL DATA BOOK

OC367

Use new refrigerant pipes.

Make sure that the inside and outside of refrigerant piping is clean and it has no contamination such as sulfur hazardous for use, oxides, dirt, shaving particles, etc. In addition, use pipes with specified thickness.

Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.)

Use ester oil, ether oil or alkylbenzene oil (small amount) as the refrigerant oil applied to flares and flange connections.

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 refrigerant 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.

Keep the tools with care.

If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of the refrigerant oil or malfunction of the compressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigerant 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 deterioration of refrigerant oil etc.

If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

If large amount of mineral oil enters, that can cause deterioration of refrigerant oil etc.

Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.

SAFETY PRECAUTION

3-1. ALWAYS OBSERVE FOR SAFETY

Before obtaining access to terminals, all supply circuits must be disconnected.

3-2. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilising refrigerant R410A

[1] Cautions for service

(1) Perform service after collecting the refrigerant left in a 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.

Gravimeter

Unit

[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.)

[3] Service tools

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

No. Specifications

1 Gauge manifold ·Only for R410A

·Use the existing fitting

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

2 Charge hose ·Only for R410A

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

3 Electronic scale 4 Gas leak detector ·Use the detector for R134a, R407C or R410A. 5 Adaptor for reverse flow check ·Attach on vacuum pump. 6 Refrigerant charge base 7 Refrigerant cylinder ·Only for R410A Top of cylinder (Pink)

8 Refrigerant recovery equipment

specifications

Cylinder with syphon

. (UNF1/2)

Air outlet

Intake grille

Air intake

Left/right guide vanes

Change the direction of airflow from the horizontal blower.

Long-life filter

Removes dust and foreign matter from air coming in through the grille (Recommended cleaning interval : Approx. every 2,500 operating hours)

Up/down guide vanes

Change the direction of airflow from the vertical blower.

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 lid

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

PART NAMES AND FUNCTIONS

● Indoor Unit

● Wired remote controller

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

● Wired remote controller

●

˚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

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 A V AILABLE” 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.

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.

“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.

Up/Down Air Direction indicator

Shows the direction 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

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.

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.

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.

wIn 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 air flow 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

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

● Wireless remote controller

A A

F.L.A

m3/min(CFM)

Pa(mmAq)

dB mm(in.) mm(in.) mm(in.) mm(in.)

kg(lbs)

Service Ref.

Power supply(phase, cycle, voltage)

Max. Fuse Size

Min.Circuit Ampacity External finish Heat exchanger Fan Fan(drive) o No.

Fan motor output

Fan motor

Airflow(Low-Medium2-Medium1-High)

External static pressure Operation control & Thermostat Noise level(Low-Medium2-Medium1-High) Field drain pipe O.D. Dimensions

Weight

D H

INDOOR UNIT

PCA-A24GA, PCA-A24GA1

Single phase, 60Hz, 208/230V

Munsell 0.70Y 8.59/0.97

Plate fin coil

Sirocco fan (direct) o 3

0.070

0.53

Dry: 14-15-16-18(495-530-565-635)

Wet: 13-14-15-16(445-480-510-570)

0(direct blow)

Remote controller & built-in

37-39-41-43

26(1-1/32)

1,310(51-9/16)

680(26-25/32)

210(8-9/32)

34(75)

Single phase, 60Hz, 208/230V

Munsell 0.70Y 8.59/0.97

Plate fin coil

Sirocco fan (direct) o 3

0.090

0.69 Dry: 20-21-23-25(705-740-810-885) Wet:18-19-21-22(635-670-730-790)

0(direct blow)

Remote controller & built-in

40-41-43-45

26(1-1/32)

1,310(51-9/16)

680(26-25/32)

270(10-5/8)

37(82)

A A

F.L.A

K/min(CFM)

Pa(mmAq)

dB mm(in.) mm(in.) mm(in.) mm(in.)

kg(lbs)

Service Ref.

Power supply(phase, cycle, voltage)

Max. Fuse Size

Min.Circuit Ampacity External finish Heat exchanger Fan Fan(drive) o No.

Fan motor output

Fan motor

Airflow(Low-Medium2-Medium1-High)

External static pressure Operation control & Thermostat Noise level(Low-Medium2-Medium1-High) Field drain pipe O.D. Dimensions

Weight

D H

INDOOR UNIT

PCA-A36GA, PCA-A36GA1

Single phase, 60Hz, 208/230V

Munsell 0.70Y 8.59/0.97

Plate fin coil

Sirocco fan (direct) o 3

0.070

0.53

Dry: 14-15-16-18(495-530-565-635)

Wet:13-14-15-16(445-480-510-570)

0(direct blow)

Remote controller & built-in

37-39-41-43

26(1-1/32)

1,310(51-9/16)

680(26-25/32)

210(8-9/32)

34(75)

A A

F.L.A

K/min(CFM)

Pa(mmAq)

dB mm(in.) mm(in.) mm(in.) mm(in.)

kg(lbs)

Service Ref.

Power supply(phase, cycle, voltage)

Max. Fuse Size

Min.Circuit Ampacity External finish Heat exchanger Fan Fan(drive) o No.

Fan motor output

Fan motor

Airflow(Low-Medium2-Medium1-High)

External static pressure Operation control & Thermostat Noise level(Low-Medium2-Medium1-High) Field drain pipe O.D. Dimensions

Weight

D H

PCA-A30GA, PCA-A30GA

INDOOR UNIT

SPECIFICATIONS

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 µbar)

PCA-A24GA PCA-A30GA PCA-A24GA

PCA-A30GA1

NOTCH

High Medium1 Medium2

Low

SPL(dB)

43 41 39 37

LINE

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 µbar)

PCA-A36GA PCA-A42GA PCA-A36GA

PCA-A42GA1

NOTCH

High Medium1 Medium2

Low

SPL(dB)

45 43 41 40

LINE

Service Ref.

Power supply(phase, cycle, voltage)

Max. Fuse Size

Min.Circuit Ampacity External finish Heat exchanger Fan Fan(drive) o No.

Fan motor output

Fan motor

INDOOR UNIT

Airflow(Low-Medium2-Medium1-High)

External static pressure Operation control & Thermostat Noise level(Low-Medium2-Medium1-High) Field drain pipe O.D. Dimensions

D H

Weight

NOISE CRITERION CURVES6

A A

F.L.A

K/min(CFM)

Pa(mmAq)

dB mm(in.) mm(in.) mm(in.) mm(in.)

kg(lbs)

PCA-A42GA, PCA-A42GA

Single phase, 60Hz, 208/230V

Munsell 0.70Y 8.59/0.97

Plate fin coil

Sirocco fan (direct) o 3

0.090

0.69 Dry: 20-21-23-25(705-740-810-885) Wet:18-19-21-22(635-670-730-790)

0(direct blow)

Remote controller & built-in

40-41-43-45

26(1-1/32)

1,310(51-9/16)

680(26-25/32)

270(10-5/8)

37(82)

3.3ft

MICROPHONE

3.3ft

about 4.62ft

ceiling

unit

11-13/16(300)

3-15/16(100)

2-1/8(54) 2-1/4(57)

7/16(11)

9 Knockout hole for fresh air intake

(6~7)

1/4~9/32

1-21/32(42) 7-1/16(179)

1-1/4(32)6-11/32(161)

20-21/32(525)

1-1/2(38)

3-1/8(79)

10-3/8(263)

6-3/4(171)

5-7/16(138)

3-3/8(86)

6-7/8

(175)

1-13/16(46)

5-5/32(131)

1/16(1)

1-1/2(38)

16-3/8(416)

48-5/8(1235)

Ceiling

Electrical box

[FRONT VIEW]

When electrical box is pulled down

9-1/32(229)

2-3/4(70)

Electrical box

5 Refrigerant-pipe connection(liquid pipe side/flared connection) 6 Knockout hole for upper pipe arrangement 7 Knockout hole for left drain pipe arrangement 8 Knockout hole for wiring arrangement

1 Drainage pipe connection(1-1/32(26mm)I.D.) 2 Drainage pipe connection(for the left arrangement) 3 Knockout hole for left drain-piping arrangement 4 Refrigerant-pipe connection(gas pipe side/flared connection)

Gas pipe

Liquid pipe

MODEL 24/30

3/8F 5/8F

2-3/4(70)

23/32(18)

5-1/2(140)

(150)

5-29/32

12-5/8(320) 3-1/8(80)

48-13/16(1240)

50-13/16(1290)

47-13/16(1214)

51-9/16(1310)

7-3/32(180)

8-9/32(210)

2-3/16(81) 3-25/32(96)

26-25/32(680)

2-7/32(56)19-29/32(506)

10(254)

3-17/32(90)6-3/8(161)

48-3/8(1228) 11-13/16(300)51-9/16(1310)10-5/8(270)

or more

26-25/32(680)

Less than

3-7/16(87)

5/8(16)

6-3/16(157)

or more

Ceiling

Rear wall

Allowing clearances

NOTES: Use M10 or W3/8 screw for anchor bolt.

(Suspension bolt pitch)

Air outlet

Air intake

gas

liquid (Drainage)

7-3/16(182)

7/15/16(201)

9-1/2(241)

9-13/16(250)

19-11/16(500)

(Gap to ceiling)

or more

1/16(1)

Less than

OUTLINES AND DIMENSIONS

PCA-A24GA PCA-A24GA1 PCA-A30GA PCA-A30GA1

Unit : inch(mm)

PCA-A36GA PCA-A36GA1

Gas pipe

MODEL

3/8F 5/8F

Liquid pipe

36/42

7/16(11)

2-3/16(55)5-7/8(150)

13(330)

7-7/8(200)

9 Knockout hole for fresh air intake

(6~7)

7-2/32(289)

1-21/32(42)

Electrical box

(160)

1/4~9/32

3-21/32(93)

6-5/16

1-1/2(38)

5-1/2(140)

(196)

1/16(1)

9-9/32(236)

7-9/16

1-25/32(45)

10-3/8(263)

6-3/4(171)

5-7/16(138)

3-3/8(86)

27-1/16(687)20-21/32(525)

48-5/8(1235)

2-3/4(70)

9-1/32(229)

(56)

10(254)

19-29/32(506)

2-7/32

26-25/32(680)

3-17/32(90)6-3/8(160)

48-3/8(1228)

3-3/16(81) 3-25/32(96)

8-5/32(207)

10-5/8(270)

47-13/16(1214)

51-9/16(1310)

50-13/16(1290)

48-13/16(1240)

23/32(18)5-29/32(150)

2-3/4(70)5-1/2(140)

12-5/8(320) 3-1/8(80)

5/8(16)

3-7/16(87)

8-17/32(217)

7-3/16(182)

7-13/16(198)

9-5/8(245)

Less than

26-25/32(680)

10-5/8(270)

(300)

11-13/16

51-9/16(1310)

19-11/16(500)

9-13/16(250)

5 Refrigerant-pipe connection(liquid pipe side/flared connection) 6 Knockout hole for upper pipe arrangement 7 Knockout hole for left drain pipe arrangement 8 Knockout hole for wiring arrangement

Air intake

Air outlet

Electrical box

When electrical box is pulled down

Less than

or more

Ceiling

[FRONT VIEW]

(Suspension bolt pitch)

(Drainage)

gas

liquid

(Gap to ceiling)

Allowing clearances

Rear wall

Ceiling

1/16(1)

NOTES: Use M10 or W3/8 screw for anchor bolt.

PCA-A42GA PCA-A42GA1

Unit : inch(mm)

+ 25 hidden pages