Mitsubishi Electric PCA-A24KA Bedienungsanleitung

SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SPLIT-TYPE, AIR CONDITIONERS

No. OCH455

INDOOR UNIT

REMOTE CONTROLLER

CONTENTS

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

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

3. PART NAMES AND FUNCTIONS....................4

4. SPECIFICATIONS............................................6

5. NOISE CRITERION CURVES..........................8

6. OUTLINES AND DIMENSIONS.......................9

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

8. REFRIGERANT SYSTEM DIAGRA............. 12

9. TROUBLESHOOTING................................... 13

10. SPECIAL FUNCTION.....................................28

11. DISASSEMBLY PROCEDURE.......................31

ON/OFF

TEMP.

Indoor unit

[Model names] [Service Ref.]

PCA-A24KA PCA-A24KA

PCA-A30KA PCA-A30KA

PCA-A36KA PCA-A36KA

PCA-A42KA PCA-A42KA

March 2009

NOTE:

• This manual describes only

service data of the indoor

units.

• RoHS compliant products

have <G> mark on the

spec name plate.

PARTS CATALOG (OCB455)

Model name

indication

1-1. OUTDOOR UNIT’S SERVICE MANUAL

1-2. TECHNICAL DATA BOOK

REFERENCE MANUAL

Series (Outdoor unit) Manual No.

PUZ-A•NHA3(-BS) PUY-A•NHA3(-BS) OCS14

PUZ-HA•NHA2 OCS15

Model name Service Ref. Service Manual No.

PUZ-A18/24/30/36/42NHA3 PUZ-A18/24/30/36/42NHA3

OCH

OCB

PUZ-A18/24/30/36/42NHA3-BS PUZ-A18/24/30/36/42NHA3-BS

PUY-A18/24/30/36/42NHA3 PUY-A18/24/30/36/42NHA3

PUY-A18/24/30/36/42NHA3-BS PUY-A18/24/30/36/42NHA3-BS

PUZ-HA30/36NHA2 PUZ-HA30/36NHA2 OCH426 OCB426

SAFETY PRECAUTION

Cautions for units utilising refrigerant R410A

2-2. CAUTIONS RELATED TO NEW REFRIGERANT

Use new refrigerant pipes.

Make sure that the inside and outside of refrige-

rant 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 indoors during

installation, 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 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.

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.

[1] Cautions for service

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

[3] Service tools

Use the below service tools as exclusive tools for R407C refrigerant.

Gravimeter

Unit

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

Indoor Unit

PART NAMES AND FUNCTIONS

Air outlet

Louver

Vane

Air intake Filter

(Inside of Air intake)

[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.)

°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

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 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

Displayed 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

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)

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

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.

Wired remote controller

SPECIFICATIONS

4-1. SPECIFICATIONS

F.L.A

m3/min(CFM)

Pa(mmAq)

mm(in.)

kg(lbs)

Service Ref.

Power supply(phase, cycle, voltage)

Max. Fuse Size

Min.Circuit Ampacity

External finish

Heat exchanger

Fan Fan(drive) %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

INDOOR UNIT

PCA-A24KA

1 phase, 60Hz, 208/230V

White Munsell 6.4Y 8.9/0.4

Plate fin coil

Sirocco fan (direct) %3

0.095

0.54

Dry: 15-16-17-19(530-565-600-670)

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

0(direct blow)

Remote controller & built-in

33-35-37-40

26(1-1/32)

1,280(50-3/8)

680(26-3/4)

230(9-1/16)

32(71)

1 phase, 60Hz, 208/230V

White Munsell 6.4Y 8.9/0.4

Plate fin coil

Sirocco fan (direct) %3

0.095

0.54

Dry: 16-17-18-20(565-600-635-705)

Wet:15-16-17-19(530-565-600-670)

0(direct blow)

Remote controller & built-in

35-37-39-41

26(1-1/32)

1,280(50-3/8)

680(26-3/4)

230(9-1/16)

32(71)

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

Heat exchanger

Fan Fan(drive) %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

PCA-A30KA

INDOOR UNIT

1 phase, 60Hz, 208/230V

White Munsell 6.4Y 8.9/0.4

Plate fin coil

Sirocco fan (direct) %4

0.160

0.97

Dry: 22-24-26-28(775-850-920-990)

Wet:20-22-24-26(705-775-850-920)

0(direct blow)

Remote controller & built-in

37-39-41-43

26(1-1/32)

1,600(63)

680(26-3/4)

230(9-1/16)

36(79)

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

Heat exchanger

Fan Fan(drive) %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

INDOOR UNIT

PCA-A36KA

1 phase, 60Hz, 208/230V

White Munsell 6.4Y 8.9/0.4

Plate fin coil

Sirocco fan (direct) %4

0.160

0.97

Dry: 23-25-27-29(810-885-955-1025)

Wet: 21-23-25-27(740-810-885-955)

0(direct blow)

Remote controller & built-in

39-41-43-45

26(1-1/32)

1,600(63)

680(26-3/4)

230(9-1/16)

38(84)

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

Heat exchanger

Fan Fan(drive) %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

PCA-A42KA

INDOOR UNIT

NOISE CRITERION CURVES5

NOTCH

High

Medium1

Medium2

Low

SPL(dB)

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

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

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

NOTCH

High

Medium1

Medium2

Low

SPL(dB)

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 bar)

NOTCH

High

Medium1

Medium2

Low

SPL(dB)

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 bar)

NOTCH

High

Medium1

Medium2

Low

SPL(dB)

LINE

3.3ft

3.3ft unit

about 4.62ft

MICROPHONE

ceiling

PCA-A24KA PCA-A30KA

PCA-A36KA PCA-A42KA

OUTLINES AND DIMENTIONS6

PCA-A24KA PCA-A30KA Unit: inch (mm)

When drain socket

is installed

9-3/16(233)

Drainage

When drain socket

is installed

9-11/16(246)

i-see sensor

liquid Φ3/8(Φ9.52)

gas Φ5/8(Φ15.88)

Drainage

46-3/16(1173)

1/16(2) 1/16(2)50-3/8(1280)

1-7/8(48)5/16(8)

47-3/16(1198)

3-3/8(85)

7-3/16(182)

26-3/4(680)

18-3/4(476) 2-1/4(57)

9-1/16(230)

7-11/16(195)

3-7/16(88)

3-5/16(84)

3-1/8(80)

26-3/4(680)

12-5/8(320)

48-11/16(1237) (Suspension bolt pitch)

11/16(18)

5-1/2(140) 2-7/16(62)

5-7/8(150)

9-5/16(236)

7-7/8(200)

9-11/16(246)

2(51)

3/8(10)

3/16(5)

15-1/4(387)

3-3/8(86)

3-3/8(85)

1-1/2(38)

2-15/16(75)

When electrical box

is pulled down

1/16(2)

10-1/4(260)

1/16(1)

7-1/12(190)

1-7/16(37)

5-7/16(138)

4-15/16(126)

In case of the rear pipe arrangement, make sure to

remove the shaded portions from the independent piece.

Then put the independent piece back in initial

position.(The heat exchanger might be clogged because of dust)

Ceiling

Electrical box

[FRONT VIEW]

11/16(18)

4-3/4(121)

Φ4-15/16(Φ125)

7-1/2(190)

3(76)

4-7/8(124)

18-1/8(461)

1-13/16(46)

9-3/16(233)

NOTES.

1.Use M10 or W3/8 screw for anchor bolt.

2.Please be sure when installing the drain lift up

mechanism(option parts),refrigerant pipe will be only upward.

DEFROST/STAND BY lamp

Emergency operation

switch <Cooling>

Receiver

Operation lamp

Emergency operation

switch <Heating>

In case of wireless remote controller

and i-see sensor(Optional Parts)

Knockout hole for upper drain pipe arrangement

Knockout hole for fresh air intake Φ3-15/16(Φ100)

Knockout hole for wiring arrangement Φ7/8(Φ22)

Accessory...Drain socket (1(26mm) I.D.)

Drainage pipe connection(1(26mm)I.D.)

Drainage pipe connection(for the left arrangement)

Knockout hole for left drain-piping arrangement

Refrigerant-pipe connection(gas pipe side/flared connection)

Refrigerant-pipe connection(liquid pipe side/flared connection)

Electrical box

Air outlet

In case of wireless

remote controller

and i-see sensor

(Optional Parts)

9/16

10(254)

7-1/16(180)

120°

Air intake

PCA-A36KA PCA-A42KA Unit: inch (mm)

When drain socket

is installed

9-3/16(233)

When drain socket

is installed

Drainage

9-11/16(246)

NOTES.

1.Use M10 or W3/8 screw for anchor bolt.

2.Please be sure when installing the drain lift up

mechanism (option parts),refrigerant pipe will be only upward.

26-3/4(680)

12-5/8(320)

61-5/16(1557) (Suspension bolt pitch)

11/16(18)

140

5-7/8(150)

2-7/165-1/2

3-1/8

Air outlet

58-3/4(1493)

1/16(2) 63(1600)

9-1/16(230)

7-11/16(195)

3-7/16(88)

3-5/16(84)

[FRONT VIEW]

1-7/8(48)5/16(8)

9-3/16(233)

1-13/16(46)

18-1/8(461)

4-7/8(124)

3(76)

7-1/2(190)

Φ4-15/16(Φ125)

4-3/4(121)

11/16(18)

Electrical box

Ceiling

In case of the rear pipe arrangement, make sure to

remove the shaded portions from the independent piece.

Then put the independent piece back in initial

position.(The heat exchanger might be clogged because of dust)

4-15/16(126)

5-7/16(138)

1-7/16(37)

7-1/2(190)

1/16(1)

10-1/4(260)

1/16(2)

When electrical box

is pulled down

2-15/16(75)

1-1/2(38)

3-3/8(85)

3-3/8(86)

15-1/4(387)

Electrical box

Air intake

59-3/4(1518)

26-3/4(680)

18-3/4(476)

182 85

7-3/16 3-3/8

2-1/4

In case of wireless remote controller

and i-see sensor(Optional Parts)

Emergency operation

switch <Heating>

Operation lamp

Receiver

Emergency operation

switch <Cooling>

DEFROST/STAND BY lamp

9-5/16(236)

liquid Φ3/8(Φ9.52)

gas Φ5/8(Φ15.88)

Drainage

7-7/8(200)

9-11/16(246)

2(51)

3/8(10)

3/16(5)

9/16

In case of wireless

remote controller

and i-see sensor

(Optional Parts)

1/16(2)

120°

2-15/16(75)

10(254)

7-1/16(180)

Knockout hole for upper drain pipe arrangement

Knockout hole for fresh air intake Φ3-15/16(Φ100)

Knockout hole for wiring arrangement Φ7/8(Φ22)

Accessory...Drain socket (1(26mm)I.D.)

Drainage pipe connection(1(26mm)I.D.)

Drainage pipe connection(for the left arrangement)

Knockout hole for left drain-piping arrangement

Refrigerant-pipe connection

(gas pipe side/flared connection)

Refrigerant-pipe connection

(liquid pipe side/flared connection)

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