Mitsubishi Electric Mr.Slim PUHZ-FRP71VHA User manual

SERVICE MANUAL
No.OCH544
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R410A
August 2013
Outdoor unit
[Model name]
PUHZ-FRP71VHA
[Service Ref.]
PUHZ-FRP71VHA
PUHZ-FRP71VHA PARTS CATALOG (OCB544)
CONTENTS
1. REFERENCE MANUAL ·································2
2. SAFETY PRECAUTION ·································3
3. FEATURES ·····················································7
4. SPECIFICATIONS ··········································8
5. DATA ·······························································9
6. OUTLINES AND DIMENSIONS ···················11
7. WIRING DIAGRAM ······································12
8. WIRING SPECIFICATIONS ··························13
9. REFRIGERANT SYSTEM DIAGRAM ·············15
10. TROUBLESHOOTING ·································17
11. FUNCTION SETTING ···································71
12. MONITORING THE OPERATION DATA
BY THE REMOTE CONTROLLER ················84
13. EASY MAINTENANCE FUNCTION ·············95
14. DISASSEMBLY PROCEDURE ····················99
Note:
• This manual describes only
service data of the outdoor
units.
•
RoHS compliant products
have <G> mark on the spec
name plate.

2
INDOOR UNIT SERVICE MANUAL
For Air to Air system
1REFERENCE MANUAL
For Air to Water system
Model name Service ref. Service manual No.
EHST20C-VM6HB
EHST20C-YM9HB
EHST20C-TM9HB
EHST20C-VM2B
EHST20C-VM6B
EHST20C-YM9B
EHST20C-VM6EB
EHST20C-YM9EB
EHST20C-VM6SB
EHPT20X-VM2HB
EHPT20X-VM6HB
EHPT20X-YM9HB
EHPT20X-TM9HB
EHPT20X-VM6B
EHPT20X-YM9B
EHST20C-VM6HB.UK
EHST20C-YM9HB.UK
EHST20C-TM9HB.UK
EHST20C-VM2B.UK
EHST20C-VM6B.UK
EHST20C-YM9B.UK
EHST20C-VM6EB.UK
EHST20C-YM9EB.UK
EHST20C-VM6SB.UK
EHPT20X-VM2HB.UK
EHPT20X-VM6HB.UK
EHPT20X-YM9HB.UK
EHPT20X-TM9HB.UK
EHPT20X-VM6B.UK
EHPT20X-YM9B.UK
OCH531
EHSC-VM2B
EHSC-VM6B
EHSC-YM9B
EHSC-TM9B
EHSC-VM6EB
EHSC-YM9EB
EHPX-VM2B
EHPX-VM6B
EHPX-YM9B
ERSC-VM2B
EHSC-VM2B.UK
EHSC-VM6B.UK
EHSC-YM9B.UK
EHSC-TM9B.UK
EHSC-VM6EB.UK
EHSC-YM9EB.UK
EHPX-VM2B.UK
EHPX-VM6B.UK
EHPX-YM9B.UK
ERSC-VM2B.UK
OCH532
Model name Service Ref. Service
Manual No.
PLA-ZRP35/50/60/71/125/140BA PLA-ZRP35/50/60/71/125/140BA.UK OCH535
OCB535
PCA-RP35/50/60/71/100/125/140KAQ PCA-RP35/100/125/140KAQ
PCA-RP50/60/71KAQR1
OCH491
OCB491
PCA-RP71/125HAQ PCA-RP71/125HAQ OCH492
OCB492
PKA-RP35/50HAL PKA-RP35/50HAL OCH453
OCB453
PKA-RP60/71/100KAL PKA-RP60/71/100KAL OCH452
OCB452
PSA-RP71/100/125/140KA PSA-RP71/100/125/140KA OCH528
OCB528
PEAD-RP35/50/60/71/100/125/140JA(L)Q PEAD-RP35/50/60/71/100/125/140JA(L)QR1.UK HWE10090
BWE10160
OCH544

3
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
2SAFETY PRECAUTION
2-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R410A
Preparation before the repair service.
• Prepare the proper tools.
• Prepare the proper protectors.
• Provide adequate ventilation.
• After stopping the operation of the air conditioner, turn off the power-supply beaker.
• Discharge the condenser before the work involving the electric parts.
Precautions during the repair service.
• Do not perform the work involving the electric parts with wet hands.
• Do not pour water into the electric parts.
• Do not touch the refrigerant.
• Do not touch the hot or cold areas in the refrigerating cycle.
• When the repair or the inspection of the circuit needs to be done without turning off the power,
exercise great caution not to touch the live parts.
Use new refrigerant pipes.
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.
Store the piping indoors, and both ends of the
piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
In case of using the existing pipes for R22, be careful with
the followings.
· Be sure to clean the pipes and make sure that the insides
of the pipes are clean.
· 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.
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 compressor.
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.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the
unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the
spec labels provided with our products.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
Use the specified refrigerant only.
OCH544

4
[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.
[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.)
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A 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 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 —
OCH544

5
2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES
(1) Flowchart
Perform the airtight test, vacuum air purging,
additional refrigerant charging (if necessary),
and gas leak check.
• Refer to the f owchart below to determine if the existing pipes can be used and if it is necessary to use a f lter dryer.
• If the diameter of the existing pipes is different from the specif ed diameter, refer to technological data materials to conf rm if
the pipes can be used.
▼
▼
▼
▼
▼
▼▼
Measure the existing pipe thickness and
check for damage.
The existing pipe thickness meets specif ca-
tions and the pipes are not damaged.
Check if the existing air conditioner can operate.
After operating the cooling system for about 30
minutes, do a pump down work.
Disconnect the existing air conditioner from the
pipes.
Attach the new air conditioner
Test run The existing pipes cannot be reused.
Use new pipes.
* If the existing air conditioner cannot operate, use a
refrigerant recovery device to collect the refrigerant.
* If the existing pipes have been used for gas or oil
heat pump system, use new pipes.
The existing pipe thickness does not meet
specif cations or the pipes are damaged.
OCH544

6
(2) Cautions for refrigerant piping work
New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same
as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working
pressure of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.
1 Thickness of pipes
Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness
shown below. (Never use pipes of 0.7 mm or below.)
2 Dimensions of flare cutting and flare nut
The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that,
R410A is a refrigerant, which has higher risk of leakage because its working pressure is higher than that of other refriger-
ants. Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A has been speci-
fied separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also
has partly been changed to increase intensity as shown below. Set copper pipe correctly referring to copper pipe flaring
dimensions for R410A below. For 1/2 and 5/8 inch, the dimension B changes.
Use torque wrench corresponding to each dimension.
3 Tools for R410A (The following table shows whether conventional tools can be used or not.)
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
0.8
0.8
0.8
1.0
—
0.8
0.8
0.8
1.0
1.0
Nominal
dimensions(inch)
Diagram below: Piping diameter and thickness
Outside
diameter (mm)
Thickness (mm)
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
9.1
13.2
16.6
19.7
—
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions(inch)
Flare cutting dimensions
Outside
diameter
Dimension A ( )
+0
-0.4
(mm)
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
17.0
22.0
26.0
29.0
—
17.0
22.0
24.0
27.0
36.0
Nominal
dimensions(inch)
Flare nut dimensions
Outside
diameter
Dimension B
(mm)
R410A R22
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery equipment
Refrigerant cylinder
Applied oil
Safety charger
Charge valve
Vacuum pump
Flare tool
Bender
Pipe cutter
Welder and nitrogen gas cylinder
Refrigerant charging scale
Vacuum gauge or thermis-
tor vacuum gauge and
vacuum valve
Charging cylinder
Air purge, refrigerant charge
and operation check
Gas leak check
Refrigerant recovery
Refrigerant charge
Apply to flared section
Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Prevent gas from blowing out
when detaching charge hose
Vacuum drying and air
purge
Flaring work of piping
Bend the pipes
Cut the pipes
Weld the pipes
Refrigerant charge
Check the degree of vacuum. (Vacuum
valve prevents back flow of oil and refri-
gerant to thermistor vacuum gauge)
Refrigerant charge
Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Ester oil and alkylbenzene
oil (minimum amount)
Tool exclusive for R410A
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adap-
ter for reverse flow check
Tools for other refrigerants
can be used by adjusting
flaring dimension
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants
can be used
Tool exclusive for R410A
Tools and materials Use R410A tools Can R22 tools be used?
(Usable if equipped
with adapter for rever-
se flow)
(Usable by adjusting
flaring dimension)
Can R407C tools be used?
Ester oil:
Alkylbenzene oil: minimum amount
(Usable if equipped
with adapter for rever-
se flow)
(Usable by adjusting
flaring dimension)
: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
: Tools for other refrigerants can be used under certain conditions.
: Tools for other refrigerants can be used.
Dimension A
Dimension B
OCH544

7
3 FEATURES
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT.
Max. 30m (Air conditioner side and hot water side total)
The refrigerant circuit with LEV (Linear Expansion Valve) always control the optimal refrigerant level regardless of the length
(Total 30 m max. and 5 m min.) of piping. The additional refrigerant charging work during installation often causes problems.
It is completely eliminated by chargeless system. This unique system improves the quality and reliability of the work done. It
also helps to speed up the installation time.
PUHZ-FRP71VHA
OCH544

8
4 SPECIFICATIONS
A
kW
W
kW
*
/min(CFM )
dB
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
L
mm(in.)
mm(in.)
mm(in.)
mm(in.)
Power supply (phase, cycle, voltage)
Max. current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan Fan (drive) %No.
Fan motor output
Airflow
Defrost method
Noise level
Dimensions
Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.
Connection method
Between the indoor &
outdoor unit
ATA Cooling
HR Cooling
ATA Heating
ATW Heating
W
D
H
Liquid
Gas
Liquid
Gas
ATA
ATW
ATA indoor side
ATW indoor side
Outdoor side
Height difference
Piping length
Service Ref. PUHZ-FRP71VHA
SNB172FSHM1
Propeller fan % 1
0.086
55 (1,940)
47
48
943 (37-1/8)
73 (161)
3.8 (8.4)
0.70 (FV50S)
Max. 60 m total, Max. 30 m for each
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
Inverter
—
Plate fin coil
Reverse cycle
950 (37-3/8)
330+30 (13+1-3/16)
R410A
9.52 (3/8)
15.88 (5/8)
9.52 (3/8)
15.88 (5/8)
Flared
Flared
Flared
Max. 20 m
HP switch
Comp. surface thermo
Discharge thermo
Single, 50 Hz, 230 V
OUTDOOR UNIT
REFRIGERANT PIPING
1.6
19
OCH544

9
5DATA
5-1. REFILLING REFRIGERANT CHARGE (R410A : kg)
U-V
U-W
W-V
Service Ref.
Compressor model
Winding
Resistance
( )
(at 20°C)
SNB172FSHM1
1.34
1.34
1.34
PUHZ-FRP71VHA
Additional charge is required for pipes
longer than total 30 m.
Service Ref.
Total piping length (one way) Initial
charged
10m 20m 30m 40m 50m 60m 75m
PUHZ-FRP71VHA 3.4 3.6 3.8 4.4 5.0 5.6 — 3.8
5-2. COMPRESSOR TECHNICAL DATA
5-3. NOISE CRITERION CURVES
1.5m
1m
MICROPHONE
UNIT
GROUND
90
80
70
60
50
40
30
20
10 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 μbar)
BAND CENTER FREQUENCIES, Hz
PUHZ-FRP71VHA
ATA Cooling,
HR Cooling
ATA Heating,
ATW Heating
MODE
47
SPL(dB)
48
LINE
OCH544

10
5-4. STANDARD OPERATION DATA
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is : 1(MPa)=10.2(kgf/cm²)
Representative matching PEAD-RP71JA
Plate HEX ACH70-40
Mode ATA Cooling ATA Heating ATW Heating HR Cooling
Total
ATA capacity W 7,100 8,000 — 7,100
ATW capacity W — — 8,000 9,000
Input kW 2.10 2.09 1.96 3.22
COP 3.38 3.83 4.08 5.00
Electrical circuit
Indoor unit PEAD-RP71JA
Phase, Hz 1 , 50 1 , 50 — 1 , 50
Voltage V 230 230 — 230
Current A 0.17 0.15 — 0.17
Outdoor unit PUHZ-FRP71VHA
Phase, Hz 1 , 50 1 , 50 1 , 50 1 , 50
Voltage V 230 230 230 230
Current A 9.15 9.12 8.70 13.97
Refrigerant circuit
Discharge pressure MPa 2.79 2.46 2.13 3.39
Suction pressure MPa 0.96 0.71 0.70 0.94
Discharge temperature °C 71 62 53 80
Condensing temperature °C 47 42 37 57
Suction temperature °C 10 0 0 9
Ref. pipe length m 5 + 5 5 + 5 5 + 5 5 + 5
ATA indoor
side
Intake air temperature DB °C 27 20 — 27
WB °C 19 15 — 19
Discharge air temperature DB °C 14.5 36 — 14.5
ATW side
Return temperature °C — — 30 50
Flow temperature °C — — 35 55
Flow rate L/min — — 23 23
Outdoor
side
Intake air temperature DB °C 35 7 7 35
WB °C 24 6 6 24
SHF 0.81 — — 0.81
BF 0.11 — — 0.11
OCH544