Mitsubishi electric Pca-rp2ga Operating manual

TECHNICAL & SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SPLIT-TYPE, AIR CONDITIONERS

No. OC311

2004

NOTE:

• This manual does not cover

outdoor units. When serving

them, please refer to the

service manual No.OC261

REVISED EDITION-B,

OC285, OC294 REVISED

EDITION-B, OC298 and

this manual in a set.

INDOOR UNIT

Ceiling Suspended

Series PCA

REMOTE CONTROLLER

R407C/R410A

CONTENTS

1. COMBINATION OF INDOORAND OUTDOOR UNITS ··2

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

3. PART NAMES AND FUNCTIONS····················7

4. SPECIFICATIONS············································9

5. DATA·······························································18

6. OUTLINES AND DIMENSIONS ·····················50

WIRING DIAGRAM

············································54

REFRIGERANT SYSTEM DIAGRAM

··················55

9. TROUBLESHOOTING ···································56

10. DISASSEMBLY PROCEDURE ······················66

11. PARTS LIST ···················································71

12. OPTIONAL PARTS ········································78

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN

FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY

DEFROST

TEMP.

Indoor unit

[Model names] [Service Ref.]

PCA-RP2GA PCA-RP2GA

PCA-RP2.5GA PCA-RP2.5GA

PCA-RP3GA PCA-RP3GA

PCA-RP4GA PCA-RP4GA

PCA-RP5GA PCA-RP5GA

PCA-RP6GA PCA-RP6GA

Model name

indication

OC311--1.qxp 04.5.31 1:03 PM Page 1

1COMBINATION OF INDOOR AND OUTDOOR UNITS

Outdoor unit [OC294 REVISED EDITION-B]

Heat pump type

PUHZ-RP

Outdoor unit [OC285]

Heat pump type

PUH-P

(R407C Fixed speed)

(R410A Inverter)

Outdoor unit [OC298]

Cooling only type

PU-P

—

2VHA 2.5VHA 3VHA 4VHA

4VHA1

6VHA

6VHA1

5VHA

5VHA1

Indoor unit

Heat pump without

electric heater

Cooling only

—

VGAA

24562.5 3 2 4 5 62.5 3

VGAA VGAA YGAA YGAA YGAA YGAA VGAA VGAA VGAA YGAA YGAA YGAA YGAA

Indoor unit

PCA-RP2GA

PCA-RP2.5GA

PCA-RP3GA

PCA-RP4GA

PCA-RP5GA

PCA-RP6GA

PCA-RP2GA

PCA-RP2.5GA

PCA-RP3GA

PCA-RP4GA

PCA-RP5GA

PCA-RP6GA

Outdoor unit [OC261 REVISED EDITION-B]

PCA-RP2GA

PCA-RP2.5GA

PCA-RP3GA

PCA-RP4GA

PCA-RP5GA

PCA-RP6GA

Heat pump

without

electric heater

Cooling only

—

Indoor unit

PUH-P · .UK

2 2.5 3 4 5

VGAA

YGAA

VGAA

YGAA

VGAA

YGAA

VGAA

YGAA

VGAA

YGAA

VGAA

YGAA

VGAA

YGAA

VGAA

YGAA

6 2 2.5 3 4 5 6

Heat pump type Cooling only type

PU-P · .UK

(R407C Fixed speed)

OC311--1.qxp 04.5.31 1:03 PM Page 2

SAFETY PRECAUTION

[2] Refrigerant recharging

(1) Refrigerant recharging process

1Direct charging from the cylinder.

·R407C cylinder are available on the market has a syphon pipe.

·Leave the syphon pipe cylinder standing and recharge it.

(By liquid refrigerant)

(2) Recharge in refrigerant leakage case

·After recovering the all refrigerant in the unit, proceed to working.

·Do not release the refrigerant in the air.

·After completing the repair service, recharge the cycle with the specified amount of

liquid refrigerant.

[1] Cautions for service

·After recovering the all refrigerant in the unit, proceed to working.

·Do not release refrigerant in the air.

·After completing the repair service, recharge the cycle with the specified amount of

liquid refrigerant.

Cautions for units utilising refrigerant R407C

CAUTIONS RELATED TO NEW REFRIGERANT

Do not use the existing refrigerant piping.

The old refrigerant and lubricant in the existing piping

contains a large amount of chlorine which may cause the

lubricant deterioration of the new unit.

Use “low residual oil piping”

If there is a large amount of residual oil (hydraulic oil, etc.)

inside the piping and joints, deterioration of the lubricant

will result.

Use ESTR , ETHER or HAB as the lubricant to

coat flares and flange connection parts.

If large amount of mineral oil enter, that can cause

deterioration of refrigerant oil etc.

Use liquid refrigerant to charge the system.

If gas refrigerant is used to seal the system, the composition

of the refrigerant in the cylinder will change and performance

may drop.

Do not use a refrigerant other than R407C.

If another refrigerant (R22, etc.) is used, the chlorine in the

refrigerant may cause the lubricant deterioration.

Use a vacuum pump with a reverse flow check valve.

The vacuum pump oil may flow back into the refrigerant

cycle and cause the lubricant deterioration.

Store the piping to be used during installation

indoors with keep both ends sealed until just

before brazing.

(Store elbows and other joints in a plastic bag.)

If dust, dirt, or water enters the refrigerant cycle,

deterioration of the oil and compressor trouble may result. Ventilate the room if refrigerant leaks during

operation. If refrigerant comes into contact with

a flame, poisonous gases will be released.

Gravimeter

Unit

OC311--1.qxp 04.5.31 1:03 PM Page 3

[3] Service tools

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

No. Tool name Specifications

1Gauge manifold ·Only for R407C.

·Use the existing fitting SPECIFICATIONS. (UNF7/16)

·Use high-tension side pressure of 3.43MPa·G or over.

2Charge hose ·Only for R407C.

·Use pressure performance of 5.10MPa·G or over.

3Electronic scale

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

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

6Refrigerant charge base.

7Refrigerant cylinder. ·For R407C ·Top of cylinder (Brown)

·Cylinder with syphon

8Refrigerant recovery equipment.

OC311--1.qxp 04.5.31 1:03 PM Page 4

Cautions for units utilising refrigerant R410A

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 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.

In case of using the existing pipes for R22, be careful with

the followings.

· For RP4 ,5 and 6, be sure to perform replacement

operation before test run.

· Change flare nut to the one provided with this product.

Use a newly flared pipe.

· Avoid using thin pipes.

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.

Keep the tools with care.

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

cause deterioration of refrigerant oil or malfunction of com-

pressor.

If large amount of mineral oil enter, 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.

[1] Cautions for service

(1) Perform service after collecting 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.

[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.)

OC311--1.qxp 04.5.31 1:03 PM Page 5

Gravimeter

Unit

[3] Service tools

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

No. 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

OC311--1.qxp 04.5.31 1:03 PM Page 6

PART NAMES AND FUNCTIONS

● Remote controller

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

● Indoor Unit

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.

● Operation buttons

PAR-20MAA

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN

FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY

DEFROST

FILTER

CHECK TEST

TEMP.

TIMER SET

Press this button to switch the cooler,

electronic dry (dehumidify), automatic

and heater modes.

OPERATION SWITCH button

This sets the room temperature. The

temperature setting can be performed

in 1:units

Setting range

Cooler 19:to 30:

Heater 17:to 28:

TEMP. ADJUSTMENT button

This switches between continuous

operation and the timer operation.

TIMER button

This switches between the operation

and stop modes each time it is pressed.

The lamp on this button lights during

operation.

ON/OFF button

Only press this button to perform an

inspection check or test operation.

Do not use it for normal operation.

CHECK-TEST RUN button

This switch the horizontal fan motion

ON and OFF.

(Not available for this model.)

LOUVER button

This sets the ventilation fan speed.

VENTILATION button

This adjusts the vertical angle of the

ventilation.

AIR DIRECTION button

This resets the filter service indication

display

FILTER button

This sets the current time, start time

and stop time.

TIME SETTING button

This sets the ventilation fan speed.

AIR SPEED button

OC311--1.qxp 04.5.31 1:03 PM Page 7

Caution

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

●When power is turned ON for the first time the (CENTRAL CTRL) display appears to go off momentarily but this is not a

malfunction.

●When the central control remote control unit, which is sold separately, is used the ON-OFF button, operation switch button

and TEMP. adjustment button do not operate.

●“NOT AVAILABLE” is displayed when the Air speed button is pressed.This indicates that this room unit is not equipped with

the fan direction adjustment function and the louver function.

●When power is turned ON for the first time, it is normal that “H0” is displayed on the room temperature indication (For max.

2minutes). Please wait until this “H0” indication disappear then start the operation.

PAR-20MAA

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN

FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY

DEFROST

FILTER

CHECK TEST

TEMP.

TIMER SET

CENTRALLY

CONTROLLED display

This indicates when the unit is con-

trolled by optional features such as

central control type remote controller.

TIMER display

This indicates when the continuous

operation and time operation modes

are set.

It also display the time for the timer

operation at the same time as when

it is set.

OPERATION MODE display

This indicates the operation mode.

STANDBY display

This indicates when the standby

mode is set from the time the sleep

operation starts until the heating air

is discharged.

DEFROST display

This indicates when the defrost oper-

ation is performed.

CHECK display

This indicates when a malfunction

has occurred in the unit which should

be checked.

CLOCK display

The current time , start time and stop

time can be displayed in ten second

intervals by pressing the time switch

button. The start time or stop time is

always displayed during the timer

operation.

●Display

In this display example on the bot-

tom left, a condition where all dis-

play lamps light is shown for expla-

nation purposes although this differs

from actual operation.

Operation lamp

This lamp lights during operation,

goes off when the unit stops and

flashes when a malfunction occurs.

POWER display

This lamp lights when electricity is

supplied to the unit.

SET TEMPERATURE display

This displays the selected setting

temperature.

FAN SPEED display

The selected fan speed is displayed.

ROOM TEMPERATURE display

The temperature of the suction air is

displayed during operation. The dis-

play range is 8° to 39°C. The display

flashes 8°C when the actual temper-

ature is less than 8° and flashes

39°C when the actual temperature is

greater than 39°C.

display

This display lights in the check mode

or when a test operation is per-

formed.

CHECK MODE

TEST RUN

FILTER

display

This lamp lights when the filter need

to be cleaned.

AIR DIRECTION display

This displays the air direction.

OC311--1.qxp 04.5.31 1:03 PM Page 8

SPECIFICATIONS

4-1. Heat pump type (1)

Service Ref.

Item

Btu/h

K/min(CFM)

Pa(mmAq)

mm(in.)

kg(lbs)

Function

Capacity

Total input

Service Ref.

Power supply(phase, cycle, voltage)

Input

Running current

Starting current

External finish

Heat exchanger

Fan Fan(drive) x No.

Fan motor output

Airflow

(Low-Med2-Med1-High)

External static pressure

Operation control & Thermostat

Noise level(Low-Med2-Med1-High)

Unit drain pipe O.D.

Dimensions

Weight

INDOOR UNIT

PCA-RP2.5GA

Cooling

20,500

6,000(2,700~6,700)

1.63

0.12

0.53

1.27

Heating

23,900

7,000(2,800~8,200)

2.03

0.12

0.53

1.27

Single phase, 50Hz, 220-230-240V

Munsell 0.70Y 8.59/0.97

Plate fin coil

Sirocco fan (direct) x 3

0.070

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

0(direct blow)

Remote controller & built-in

37-39-41-43

26(1)

1,310(51-9/16)

680(26-3/4)

210(8-1/4)

34(75)

PUHZ-RP2.5VHA

Service Ref.

OUTDOOR

UNIT

Notes1. Rating Conditions (ISO T1)

Cooling : Indoor : D.B. 27˚C(80˚F), W.B. 19˚C (66˚F) Outdoor : D.B. 35˚C(95˚F), W.B. 24˚C (75˚F)

Heating : Indoor : D.B. 20˚C(68˚F) Outdoor : D.B. 7˚C(45˚F), W.B. 6˚C (43˚F)

Refrigerant piping length (one way) : 5m (16ft)

4. Above data based on indicated voltage

Indoor Unit Single phase 230V 50Hz

Outdoor Unit Single phase 230V 50Hz

2. Guaranteed operating range

Upper limit

Lower limit

Upper limit

Lower limit

Indoor

D.B. 35˚C, W.B. 22.5˚C

D.B. 19˚C, W.B. 15˚C

D.B. 28˚C

D.B. 17˚C

Outdoor

D.B. 46˚C

D.B. -5˚C

D.B. 21˚C, W.B. 15˚C

D.B. -11˚C, W.B. -12˚C

Cooling

Heating

5. Refer to the service manual of outdoor unit for the outdoor unit's specifications.

3. Guaranteed voltage

198~264V, 50Hz

Cooling

16,000

4,700(2,300~5,400)

1.67

0.09

0.41

1.20

Heating

18,800

5,500(2,500~6,600)

1.71

0.09

0.41

1.20

Single phase, 50Hz, 220-230-240V

Munsell 0.70Y 8.59/0.97

Plate fin coil

Sirocco fan (direct) x 2

0.054

10-11-12-13(355-390-425-460)

0(direct blow)

Remote controller & built-in

37-38-40-42

26(1)

1,000(39-3/8)

680(26-3/4)

210(8-1/4)

27(60)

PUHZ-RP2VHA

PCA-RP2GA

Service Ref.

Item

Btu/h

K/min(CFM)

Pa(mmAq)

mm(in.)

kg(lbs)

Function

Capacity

Total input

Service Ref.

Power supply(phase, cycle, voltage)

Input

Running current

Starting current

External finish

Heat exchanger

Fan Fan(drive) x No.

Fan motor output

Airflow

(Low-Med2-Med1-High)

External static pressure

Operation control & Thermostat

Noise level(Low-Med2-Med1-High)

Unit drain pipe O.D.

Dimensions

Weight

Service Ref.

INDOOR UNIT

OUTDOOR

UNIT

OC311--1.qxp 04.5.31 1:03 PM Page 9

Service Ref.

Item

Btu/h

K/min(CFM)

Pa(mmAq)

mm(in.)

kg(lbs)

Function

Capacity

Total input

Service Ref.

Power supply(phase, cycle, voltage)

Input

Running current

Starting current

External finish

Heat exchanger

Fan Fan(drive) x No.

Fan motor output

Airflow

(Low-Med2-Med1-High)

External static pressure

Operation control & Thermostat

Noise level(Low-Med2-Med1-High)

Unit drain pipe O.D.

Dimensions

Weight

INDOOR UNIT

PCA-RP4GA

Cooling

34,100

10,000(5,000~11,400)

10,000(4,500~11,400)

2.92

0.15

0.69

1.48

Heating

27,300

11,200(5,600~14,000)

11,200(4,500~14,000)

3.26

0.15

0.69

1.48

Single phase, 50Hz, 220-230-240V

Munsell 0.70Y 8.59/0.97

Plate fin coil

Sirocco fan (direct) x 3

0.090

20-21-23-25(705-740-810-885)

0(direct blow)

Remote controller & built-in

40-41-43-45

26(1)

1,310(51-9/16)

680(26-3/4)

270(10-5/8)

37(82)

Service Ref.

OUTDOOR

UNIT PUHZ-RP4VHA

PUHZ-RP4VHA1

PUHZ-RP4VHA

PUHZ-RP4VHA1

Notes1. Rating Conditions (ISO T1)

Cooling : Indoor : D.B. 27˚C(80˚F), W.B. 19˚C (66˚F) Outdoor : D.B. 35˚C(95˚F), W.B. 24˚C (75˚F)

Heating : Indoor : D.B. 20˚C(68˚F) Outdoor : D.B. 7˚C(45˚F), W.B. 6˚C (43˚F)

Refrigerant piping length (one way) : 5m (16ft)

4. Above data based on indicated voltage

Indoor Unit Single phase 230V 50Hz

Outdoor Unit Single phase 230V 50Hz

2. Guaranteed operating range

Upper limit

Lower limit

Upper limit

Lower limit

Indoor

D.B. 35˚C, W.B. 22.5˚C

D.B. 19˚C, W.B. 15˚C

D.B. 28˚C

D.B. 17˚C

Outdoor

D.B. 46˚C

D.B. -5˚C

D.B. 21˚C, W.B. 15˚C

D.B. -11˚C, W.B. -12˚C

Cooling

Heating

5. Refer to the service manual of outdoor unit for the outdoor unit's specifications.

3. Guaranteed voltage

198~264V, 50Hz

Cooling

24,200

7,100(3,300~8,100)

2.14

0.12

0.53

1.27

Heating

27,300

8,000(3,500~10,200)

2.43

0.12

0.53

1.27

Single phase, 50Hz, 220-230-240V

Munsell 0.70Y 8.59/0.97

Plate fin coil

Sirocco fan (direct) x 3

0.070

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

0(direct blow)

Remote controller & built-in

37-39-41-43

26(1)

1,310(51-9/16)

680(26-3/4)

210(8-1/4)

34(75)

PUHZ-RP3VHA

PCA-RP3GA

Service Ref.

Item

Btu/h

K/min(CFM)

Pa(mmAq)

mm(in.)

kg(lbs)

Function

Capacity

Total input

Service Ref.

Power supply(phase, cycle, voltage)

Input

Running current

Starting current

External finish

Heat exchanger

Fan Fan(drive) x No.

Fan motor output

Airflow

(Low-Med2-Med1-High)

External static pressure

Operation control & Thermostat

Noise level(Low-Med2-Med1-High)

Unit drain pipe O.D.

Dimensions

Weight

Service Ref.

INDOOR UNIT

OUTDOOR

UNIT

OC311--1.qxp 04.5.31 1:03 PM Page 10

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