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
7. WIRING DIAGRAM ············································54
8. 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

2
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
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2VHA 2.5VHA 3VHA 4VHA
4VHA1
6VHA
6VHA1
5VHA
5VHA1
Indoor unit
Heat pump without
electric heater
or
Cooling only
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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
or
Cooling only
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Indoor unit
PUH-P · .UK
2 2.5 3 4 5
VGAA
VGAA 1
YGAA
YGAA 1
VGAA
VGAA 1
YGAA
YGAA 1
VGAA
VGAA 1
YGAA
YGAA 1
VGAA
VGAA 1
YGAA
YGAA 1
YGAA
YGAA 1
YGAA
YGAA 1
VGAA
VGAA 1
YGAA
YGAA 1
VGAA
VGAA 1
YGAA
YGAA 1
VGAA
VGAA 1
YGAA
YGAA 1
VGAA
VGAA 1
YGAA
YGAA 1
YGAA
YGAA 1
YGAA
YGAA 1
6 2 2.5 3 4 5 6
Heat pump type Cooling only type
PU-P · .UK
(R407C Fixed speed)
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3
SAFETY PRECAUTION
2
[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
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4
[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.
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5
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.)
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6
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
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7
PART NAMES AND FUNCTIONS
3
● 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
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8
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.
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9
SPECIFICATIONS
4
4-1. Heat pump type (1)
Service Ref.
Item
Btu/h
W
kW
kW
A
A
kW
K/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
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
W
D
H
INDOOR UNIT
PCA-RP2.5GA
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
PCA-RP2GA
Service Ref.
Item
Btu/h
W
kW
kW
A
A
kW
K/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
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
W
D
H
Service Ref.
INDOOR UNIT
OUTDOOR
UNIT
OC311--1.qxp 04.5.31 1:03 PM Page 9

10
Service Ref.
Item
Btu/h
W
W
kW
kW
A
A
kW
K/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
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
W
D
H
INDOOR UNIT
PCA-RP4GA
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
PCA-RP3GA
Service Ref.
Item
Btu/h
W
kW
kW
A
A
kW
K/min(CFM)
Pa(mmAq)
dB
mm(in.)
mm(in.)
mm(in.)
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
W
D
H
Service Ref.
INDOOR UNIT
OUTDOOR
UNIT
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