Mitsubishi Electric Mr. Slim PUHZ-FRP71VHA2 User manual

SERVICE MANUAL R410A
Outdoor unit
[Model name]
PUHZ-FRP71VHA2
PUHZ-FRP71VHA2 PARTS CATALOG (OCB665)
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····························· 68
12. MONITORING THE OPERATION DATA
BY THE REMOTE CONTROLLER ·············72
13. EASY MAINTENANCE FUNCTION ·········· 82
14. DISASSEMBLY PROCEDURE················· 84
Note:
•This manual describes
only service data of the
outdoor units.
No.OCH665
REVISED EDITION-B
October 2019
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Note:
•PUHZ-FRP71VHA2R1
has been added in
REVISED EDITION-B.
OCH665 REVISED
EDITION-A is void.
[Service Ref.]
PUHZ-FRP71VHA2
PUHZ-FRP71VHA2R1

2
OCH665B
INDOOR UNIT SERVICE MANUAL
AIR-CONDITIONER system
1REFERENCE MANUAL
For Air to Water system
Model name Service ref. Service manual No.
Parts catalog No.
EHST20C-VM2C
EHST20C-VM6C
EHST20C-YM9C
EHST20C-TM9C
EHST20C-VM2EC
EHST20C-VM6EC
EHST20C-YM9EC
EHST20C-MEC
EHST20C-MHCW
EHST20C-VM2C(R1/R2).UK
EHST20C-VM6C(R1/R2).UK
EHST20C-YM9C(R1/R2).UK
EHST20C-TM9C(R1/R2).UK
EHST20C-VM2EC(R1/R2).UK
EHST20C-VM6EC(R1/R2).UK
EHST20C-YM9EC(R1/R2).UK
EHST20C-MEC(R1/R2).UK
EHST20C-MHCW(R1/R2).UK
OCH570
OCB570
EHSC-VM2C
EHSC-VM2EC
EHSC-VM6C
EHSC-VM6EC
EHSC-YM9C
EHSC-YM9EC
EHSC-TM9C
EHSC-MEC
EHSC-VM2C(R1/R2/R3).UK
EHSC-VM2EC(R1/R2/R3).UK
EHSC-VM6C(R1/R2/R3).UK
EHSC-VM6EC(R1/R2/R3).UK
EHSC-YM9C(R1/R2/R3).UK
EHSC-YM9EC(R1/R2/R3).UK
EHSC-TM9C(R1/R2/R3).UK
EHSC-MEC(R1/R2/R3).UK
OCH571
OCB571
EHST20C-VM2D
EHST20C-VM6D
EHST20C-YM9D
EHST20C-TM9D
EHST20C-YM9ED
EHST20C-MED
EHST20C-VM2D.UK
EHST20C-VM6D.UK
EHST20C-YM9D.UK
EHST20C-TM9D.UK
EHST20C-YM9ED.UK
EHST20C-MED.UK
OCH714
OCB714
EHSC-VM2D
EHSC-VM6D
EHSC-YM9D
EHSC-YM9ED
EHSC-TM9D
EHSC-MED
EHSC-VM2D.UK
EHSC-VM6D.UK
EHSC-YM9D.UK
EHSC-YM9ED.UK
EHSC-TM9D.UK
EHSC-MED.UK
OCH712
OCB712
Model name Service Ref. Service Manual No.
PLA-ZM35/71EA PLA-ZM35/71EA.UK OCH650/OCB650
PKA-M71KA(L) PKA-M71KA(L).TH OCH661/OCB661
PSA-RP71KA PSA-RP71KA OCH528/OCB528
PEAD-M71JA(L)Q PEAD-M71JA(L)Q.UK —
PCA-M35/71KA PCA-M35/71KA OCH659/OCB659

3
OCH665B
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
Preparations 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 the case of using the existing pipes for R22, be careful
with the following.
· 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.

4
OCH665B
[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) If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them.
[2] Additional refrigerant charge
When charging directly from cylinder
(1) Check that cylinder for R410A on the market is syphon type.
(2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Electronic weighing scale
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 weighing 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 —

5
OCH665B
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 owchart below to determine if the existing pipes can be used and if it is necessary to use a lter dryer.
• If the diameter of the existing pipes is different from the specied diameter, refer to technical data materials to conrm if the
pipes can be used.
▼
▼
▼
▼
▼
▼▼
Measure the existing pipe thickness and
check for damage.
The existing pipe thickness meets speci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
specications or the pipes are damaged.

6
OCH665B
(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.
1Thickness 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.)
Diagram below: Piping diameter and thickness
Nominal
dimensions(inch) Outside diameter (mm) Thickness (mm)
R410A R22
1/4 6.35 0.8 0.8
3/8 9.52 0.8 0.8
1/2 12.70 0.8 0.8
5/8 15.88 1.0 1.0
3/4 19.05 — 1.0
2Dimensions 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 strength, 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 strength as shown below. Set copper pipe correctly referring to copper pipe flaring
dimensions for R410A below. For 1/2 and 5/8 inch pipes, the dimension B changes.
Use torque wrench corresponding to each dimension.
Dimension A
Dimension B
Flare cutting dimensions Flare nut dimensions
Nominal
dimensions
(in) Outside
diameter (mm) Dimension A
(
+0
-0.4
)
(mm) Nominal
dimensions (in) Outside diameter (mm) Dimension A (mm)
R410A R22 R410A R22
1/4 6.35 9.1 9.0 1/4 6.35 17.0 17.0
3/8 9.52 13.2 13.0 3/8 9.52 22.0 22.0
1/2 12.70 16.6 16.2 1/2 12.70 26.0 24.0
5/8 15.88 19.7 19.4 5/8 15.88 29.0 27.0
3/4 19.05 — 23.3 3/4 19.05 — 36.0
3Tools for R410A (The following table shows whether conventional tools can be used or not.)
Tools and materials Use R410A tools
Can R22 tools be
used?
Can R407C tools be used?
Gauge manifold Air purge, refrigerant charge
and operation check Tool exclusive for R410A × ×
Charge hose Tool exclusive for R410A × ×
Gas leak detector Gas leak check Tool for HFC refrigerant × ○
Refrigerant recovery equipment Refrigerant recovery Tool exclusive for R410A × ×
Refrigerant cylinder Refrigerant charge Tool exclusive for R410A × ×
Applied oil Apply to ared section
Ester oil, ether oil and alkylbenzene oil
(minimum amount)
×Ester oil, ether oil: ○
Alkylbenzene oil: minimum
amount
Safety charger Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant Tool exclusive for R410A × ×
Charge valve Prevent gas from blowing out
when detaching charge hose Tool exclusive for R410A × ×
Vacuum pump Vacuum drying and air purge Tools for other refrigerants can be used if equipped with
adapter for reverse ow check
Δ(Usable if equipped
with adapter for
reverse flow)
Δ(Usable if equipped with
adapter for reverse flow)
Flare tool Flaring work of piping
Tools for other refrigerants can be
used by adjusting aring dimen-
sion
Δ(Usable by adjusting
aring dimension)
Δ(Usable by adjusting ar-
ing dimension)
Bender Bend the pipes
Tools for other refrigerants can be used ○ ○
Pipe cutter Cut the pipes
Tools for other refrigerants can be used ○ ○
Welder and nitrogen gas
cylinder Weld the pipes
Tools for other refrigerants can be used ○ ○
Refrigerant charging scale Refrigerant charge
Tools for other refrigerants can be used ○ ○
Vacuum gauge or thermistor
vacuum gauge and vacuum
valve
Check the degree of vacuum. (Vacuum
valve prevents back ow of oil and re-
frigerant to thermistor vacuum gauge)
Tools for other refrigerants can be used ○ ○
Charging cylinder Refrigerant charge Tool exclusive for R410A × -
×: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
Δ: Tools for other refrigerants can be used under certain conditions.
○: Tools for other refrigerants can be used.

7
OCH665B
3 FEATURES
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT.
Maximum 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 maximum and 5 m minimum) 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-FRP71VHA2

8
OCH665B
4 SPECIFICATIONS
Service Ref. PUHZ-FRP71VHA2
PUHZ-FRP71VHA2R1
OUTDOOR UNIT
Power source (Phase, cycle, voltage) Single, 50 Hz, 230 V
Max. current A 19
External nish Munsell 3Y 7.8/1.1
Refrigerant control Linear Expansion Valve
Compressor Hermetic
Model SNB172FSHM1
Motor output kW 1.6
Starter type Inverter
Protection devices HP switch
Comp. surface thermo
Discharge thermo
Crankcase heater W —
Heat exchanger Plate n coil
Fan Fan (drive) × No. Propeller fan x 1
Fan motor output kW 0.086
Airow K/min (CFM) 50 (1,760)
Defrost method Reverse cycle
Noise level ATACooling
HR Cooling dB 47
TA Heating
ATW Heating dB 49
Dimensions W mm (inch) 950 (37-3/8)
D mm (inch) 330+25 (13-7/8)
H mm (inch) 943 (37-1/8)
Weight kg(lb) 73 (161)
Refrigerant R410A
Charge kg(lb) 3.8 (8.4)
Oil (Model) L 0.70 (FV50S)
REFRIGERANT PIPING
Pipe size
O.D. ATA Liquid mm (inch) 9.52 (3/8)
Gas mm (inch) 15.88 (5/8)
ATW Liquid mm (inch) 9.52 (3/8)
Gas mm (inch) 15.88 (5/8)
Connection method ATAindoor side Flared
ATW indoor side Flared
Outdoor side Flared
Between the indoor &
outdoor Height difference Maximum 20 m
Piping length Maximum 60 m total, Maximum 30 m for each

9
OCH665B
5DATA
5-1. REFILLING REFRIGERANT CHARGE (R410A: kg)
U-V
U-W
W-V
Service Ref.
Compressor model
Winding
Resistance
( ")
(Winding temperature at 20°C)
SNB172FSHM1
1.34
1.34
1.34
PUHZ-FRP71VHA2
PUHZ-FRP71VHA2R1
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-FRP71VHA2
PUHZ-FRP71VHA2R1 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-FRP71VHA2
PUHZ-FRP71VHA2R1
ATA Cooling,
HR Cooling
ATA Heating,
ATW Heating
MODE
47
SPL(dB)
49
LINE

10
OCH665B
5-4. STANDARD OPERATION DATA
The unit of pressure has been changed to MPaG based on international SI system.
The conversion factor is: 1(MPaG)=10.2(kgf/cm²)
Representative matching PEAD-M71JAQ
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 2.11 1.99 3.22
COP 3.38 3.79 4.03 5.00
Electrical circuit
Indoor unit PEAD-M71JAQ
Phase, Hz 1 , 50 1 , 50 — 1 , 50
Voltage V 230 230 — 230
Current A 0.17 0.15 — 0.17
Outdoor unit PUHZ-FRP71VHA2
Phase, Hz 1 , 50 1 , 50 1 , 50 1 , 50
Voltage V 230 230 230 230
Current A 9.14 9.22 8.81 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

11
OCH665B
6OUTLINES AND DIMENSIONS
PUHZ-FRP71VHA2 PUHZ-FRP71VHA2R1 Unit: mm
Handle
for moving Earth terminal
Left
•••
Power supply wiring
Reight
••
Indoor/Outdoor wiring
Terminal Connections
Service panel Handle for moving
Terminal Connections
Cylinder/Hydrobox wiring
377
431669
950
322
943
473
23
677
Power supply wiring hole (2-
[
27Knock-Out)
Right trunking hole (Knock-Out)
Right piping hole (Knock-Out)
6373
75 40
92
922723
5519
[
92
Rear trunking hole (Knock-Out)
Rear piping hole (Knock-Out)
65
92
27 55
23 73
[
92
Front piping hole (Knock-Out)
Front trunking hole (Knock-Out)
Power supply wiring hole
(2-
[
27Knock-Out)
Piping Knock-Out Hole Details
27 55
7323 63
40
92 65
45
[
92
Example of Notes
•••
Refrigerant GAS pipe connection (FLARE)
[
15.88(5/8F)
*
Connect to indoor unit.
•••
Refrigerant LIQUID pipe connection (FLARE)
[
9.52(3/8F)
*
Connect to indoor unit.
•••
Refrigerant GAS pipe connection (FLARE)
[
15.88(5/8F)
*
Connect to cylinder unit or hydrobox.
•••
Refrigerant LIQUID pipe connection (FLARE)
[
9.52(3/8F)
*
Connect to cylinder unit or hydrobox.
This tap mark indicates the cylinder/hydro unit
connection side for the following parts.
•
Terminal bed for the connecting cables, S1/S2/S3.
•
Stop valves, gas and liquid for the refrigerant connection.
BK79F295H01
Over 100mm
Over 500mm
Over 10mm
Over 10mm
FREE
Service
space
10
Over
100
Over
500
Over
500
Over
<Foundation bolt height>
Less than
FOUNDATION
30
The diagram below shows a
basic example.
Explanation of particular details are
given in the installation manuals etc.
1 FREE SPACE (Around the unit)
2 SERVICE SPACE 3 FOUNDATION BOLTS
4 PIPING-WIRING DIRECTIONS
Piping and wiring connections
can be made from 4 directions:
FRONT,Right,Rear and Below.
Please secure the unit firmly
with 4 foundation (M10) bolts.
(Bolts and washers must be purchased locally.)
Dimensions of space needed
for service access are
shown in the below diagram.
Bottom piping hole (Knock-Out)
Drain hole
(5-[33)
219
81
30 220 145 145 145
71
71
Installation Feet
2-U Shaped notched holes
(Foundation Bolt M10)
2-12×36 oval holes
(Foundation Bolt M10)
Rear Air Intake
Side Air Intake
Air Discharge
417
19
25 330
370
175175 600
70
28
54
64
53
0
42
84
42
83
0
Side Air Intake
Rear piping cover
Front piping cover
Rear Air Intake
Air Intake
Handle
for moving
Handle for moving
1
2
3
41
2
3
4

12
OCH665B
7WIRING DIAGRAM
PUHZ-FRP71VHA2 PUHZ-FRP71VHA2R1

13
OCH665B
8WIRING SPECIFICATIONS
8-1. FIELD ELECTRICAL WIRING (power wiring specifications)
1
2
S1
S2
S3
S1
S2
S3
Indoor/outdoor
unit connection
cable
Cylinder or
Hydrobox unit/outdoor
unit connection cable
Indoor
unit
Unit
power
supply
Outdoor
unit
Remote
controller
L
BN
1
2
S1
S2
S3
S1
S2
S3
Remote
controller
BEarth leakage breaker
Cwiring circuit breaker or
isolating switch
C
Cylinder or
Hydrobox unit
B
BEarth leakage breaker
Cwiring circuit breaker or
isolating switch
CL
N1 21 2
S1
Indoor
unit
S2
S3
S1
S2
S3
S1
S2
S3
Unit
power
supply Indoor/outdoor
unit connection
cable
Indoor
unit
Outdoor
unit
Remote
controller
Cylinder or
Hydrobox unit/outdoor
unit connection cable
1
2
S1
S2
S3
S1
S2
S3
Remote
controller
Cylinder or
Hydrobox unit
1:1 system electrical wiring Synchronized twin system electrical wiring
• Synchronized twin
Notes: 1. Wiring size must comply with the applicable local and national code..
2. Power supply cables and Indoor/Outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flexible cable.
3. Install an earth line longer than power cables.
Warning:
In the case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between
power line and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals
when the power is energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type.
(Design 60245 IEC 57)
S1
S2
S3
S1
S2
S3
A-Control
Outdoor Unit
3 poles isolator
Power supply
Isolator
A-Control
Indoor Unit
Outdoor unit power supply ~/N (single), 50 Hz, 230 V
Outdoor unit input capacity Main switch (Breaker) *1 25 A
Wiring
Wire No. ×
size (mm²)
Outdoor unit power supply 3 × Min. 2.5
Indoor unit – Outdoor unit
Cylinder– or Hydrobox – Outdoor unit *2 3 × 1.5 (Polar)
Indoor unit – Outdoor unit earth
Cylinder– or Hydrobox – Outdoor unit earth *2 1 × Min. 1.5
Remote controller – Indoor unit *3
Cylinder– or Hydrobox-side remote controller – its unit 2 × 0.3 (Non-polar)
Circuit rating
Outdoor unit L – N (single)
Outdoor unit L1 – N, L2 – N, L3 – N (3 phase) *4 230 V AC
Indoor unit – Outdoor unit S1-S2
Cylinder– or Hydrobox – Outdoor unit S1-S2 *4 230 V AC
Indoor unit – Outdoor unit S2-S3
Cylinder– or Hydrobox – Outdoor unit S2-S3 *4 24 V DC
Remote controller – Indoor unit
Cylinder– or Hydrobox-side remote controller – its unit *4 12 V DC
*1 A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
Make sure that the current leakage breaker is one compatible with higher harmonics.
Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter.
The use of an inadequate breaker can cause the incorrect operation of inverter.
*2 Maximum 45 m
If 2.5 mm² used, maximum 50 m
If 2.5 mm² used and S3 separated, maximum 80 m
*3 Maximum 500 m (When using 2 remote controllers, the maximum wiring length for the remote controller cables is 200 m.)
*4 The gures are NOT always against the ground.
S3 terminal has 24 V DC against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated by the transformer or other device.
Caution: Be sure to install N-Line. Without N-Line, it could cause damage to the unit.

14
OCH665B
8-2. SEPARATE INDOOR UNIT/OUTDOOR UNIT POWER SUPPLIES
The following connection patterns are available.
The outdoor unit power supply patterns vary on models. 1:1 System
<For models without heater>
The optional indoor power supply terminal kit is required.
S1
S2
L
N
1
2
L
N
S1
S2
S3
S3
ACB CB
D
J
E
F
G
H
S1
S2
1
2
L
N
S1
S2
S3
S3
CB
M
K
N
L
Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.
AOutdoor unit power supply
BEarth leakage breaker
CWiring circuit breaker or isolating switch
DOutdoor unit
EIndoor unit/outdoor unit connecting cords
FRemote controller for indoor unit
GIndoor unit
HOption
KCylinder unit or Hydrobox/outdoor unit connecting cable
LCylinder unit or Hydrobox
MCylinder unit or Hydrobox power supply
NRemote controller for cylinder unit or hydrobox
KCylinder unit or Hydrobox/outdoor unit connecting cable
LCylinder unit or Hydrobox
MCylinder unit or Hydrobox power supply
NRemote controller for cylinder unit or hydrobox
Simultaneous twin system
Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.
<For models without heater>
The optional indoor power supply terminal kit is required.
A
B
C
D
E
F
G
H
J
Outdoor unit power supply
Earth leakage breaker
Wiring circuit breaker or isolating switch
Outdoor unit
Indoor unit/outdoor unit connecting cords
Remote controller for indoor unit
Indoor unit
Option
Indoor unit power supply
OIndoor unit earth
If the indoor and outdoor units have separate power supplies, refer to the table below.
If the optional indoor power supply terminal kit is used, change the indoor unit
electrical box wiring referring to the figure in the right and the DIP switch settings of the
outdoor unit control board.
Indoor power supply terminal kit (option)
Indoor unit electrical box connector con-
nection change
Label affixed near each wiring diagram
for the indoor and outdoor units
Outdoor unit DIP switch settings (when
using separate indoor unit/outdoor unit
power supplies only)
Indoor unit specifications
Required
Required
Required
Electric heater
(For models with
heater)
Connectors (connections when shipped
from the factory are for indoor unit power
supplied from outdoor unit)
Indoor unit power supplied from outdoor unit
(when shipped from factory)
If the indoor and
outdoor units have
separate power
supplies, change the
connections of the
connectors as shown
in the following
figure.
Connectors
Indoor unit
control board
Separate indoor unit/outdoor unit power
supplies
Electric heater
(For models with
heater)
S1
S2
S3
L
N
BLUE BLUE
YELLOW YELLOW
CND
CND
ORANGE
CND
ORANGE
S1
S2
S3
L
N
YELLOW
BLUE BLUE
YELLOW
CND
Indoor unit
control board
Note: There are 3 types of labels; A, B, and C.
Affix the appropriate labels to the units according to the wiring method.
ON
OFF
Set the SW8-3 to ON.
1 2 (SW8)
3
S1
S2
1
2
L
N
S1
S2
S3
S3
CB
M
K
N
L
E
F
D G
O
HGH
L
N
L
N
S1
S2
S3
S1
S2
S3
1
2
L
N
S1
S2
S3
1
2
ABCBC
J
*1 A breaker with at least 3 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductor of the supply.
*2 Maximum 120 m
*3 Maximum 500 m (When using 2 remote controllers, the maximum wiring length for the remote controller cables is 200 m.)
*4 The figures are NOT always against the ground.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cables and indoor unit/outdoor unit connecting cables shall not be lighter than polychloroprene sheathed
flexible cable. (Design 60245 IEC 57)
3. Install an earth line longer than power cables.
Indoor unit model
Indoor unit power supply
Indoor unit input capacity *1
*2
*3
*4
*4
*4
*4
Main switch (Breaker)
Indoor unit power supply
Indoor unit power supply earth
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Remote controller-Indoor unit
Indoor unit L-N
Indoor unit-Outdoor unit S1-S2
Indoor unit-Outdoor unit S2-S3
Remote controller-Indoor unit
RP71
~/N (single), 50 Hz, 230 V
16 A
2oMin. 1.5
1oMin. 1.5
2oMin. 0.3
–
2 o0.3 (Non-polar)
230 V AC
–
24 V DC
12 V DC
Circuit
rating
Wiring
Wire No. osize
(mm
2
)

15
OCH665B
9REFRIGERANT SYSTEM DIAGRAM
PUHZ-FRP71VHA2 PUHZ-FRP71VHA2R1
LEV-B
4-way valve
Compressor
Refrigerant flow in ATA Cooling
Refrigerant flow in ATA Heating
Refrigerant flow in HR Cooling
Refrigerant flow in ATW Heating
LEV-C
Charge
plug
Accumulator
TH6
LEV-A
TH3
High pressure
sensor (63HS)
High pressure
switch (63H)
Muffler
Charge plug
Stop valve
Stop valve
Stop valve
Stop valve
Service port
Service port
Service port
Service port
Refrigerant GAS pipe
connection (5/8F)
TH33
SV2SV1SV3
Indoor
unit TH4
Cylinder/
Hydrobox
unit
* SV1/SV2/SV3 are closed when the power is not supplied.
Refrigerant LIQUID pipe
connection (3/8F)

16
OCH665B
9-2. START AND FINISH OF TEST RUN (ATA only)
• Operation from the indoor unit
Execute the test run using the installation manual for the indoor unit.
• Operation from the outdoor unit
By using the DIP switch SW4 on the control board of outdoor unit, test run can be started and finished, and its operation
mode (cooling/heating) can be set up.
1Set the operation mode (cooling/heating) using SW4-2.
2Turn on SW4-1 to start test run with the operation mode set by SW4-2.
3Turn off SW4-1 to finish the test run.
• There may be a faint knocking sound around the machine room after power is supplied, but this is
no problem with product because the linear expansion pipe is just moving to adjust opening pulse.
• There may be a knocking sound around the machine room for several seconds after compressor
starts operating, but this is no problem with product because the check valve itself, generates the
sound because pressure difference is small in the refrigerant circuit.
Note:
The operation mode cannot be changed by SW4-2 during test run. (To change test run mode, stop the unit by SW4-1,
change the operation mode and restart the test run by SW4-1.)
OFF 1 2
ON
<SW4>
A B
C D
A
Stop C
Operation
BCooling
D
Heating
9-1. REFRIGERANT COLLECTING (PUMP DOWN)
The refrigerant collecting function is available by performing the following procedure.
1Close the 2 liquid stop valves and the cylinder/hydro unit side gas valve.
Only the indoor unit side gas valve remains open.
2Connect the 2 liquid stop valve service ports with a hose.
3Turn on the main power and wait for 3-4 minutes.
4Press the SWP button on the outdoor controller board, then the refrigerant collecting operation starts.
5 After conrming the low pressure is lowered to 0 MPa (gauge), close the indoor unit side gas valve.
The refrigerant collecting operation stops automatically in 5 minutes.
6Turn off the main power.
Warning:
Do not disconnect extension pipes during the refrigerant collecting operation is running.
If you open the stop valves to the air during the compressor is running, the pressure could be abnormal high level and this may
cause a rupture of the compressor or other hazardous situation.
* Use a refrigerant recovery machinery if the refrigerant collecting is not completed in the case of long pipe length or too much
refrigerant contained.
LEV-B
4-way valve
Compressor
LEV-C
Charge
plug
Accumulator
TH6
LEV-A
TH3
High pressure
sensor(63HS)
High pressure
switch (63H)
Muffler
Charge plug
Stop valve
Stop valve
Hose
Stop valve
Stop valve
Service port
Service port
Service port
Service port
TH33
SV2SV1SV3
Indoor
UNIT TH4
Cylinder/
Hydrobox
UNIT
* SV1/SV2/SV3 are closed when the power is not supplied.

17
OCH665B
10 TROUBLESHOOTING
10-2. CHECKPOINT UNDER TEST RUN
10-2-1. Before test run
• After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant leak-
age, loosened connections and incorrect polarity.
• Measure impedance between the ground and the power supply terminal block (L, N) on the outdoor unit by 500V Megger and
check that it is 1.0M"or over.
•
Do not use 500V Megger to indoor/outdoor connecting wire terminal block (S1, S2, S3) and remote controller terminal block (1, 2).
This may cause malfunction.
• Make sure that test run switch (SW4) is set to OFF before turning on power supply.
• Turn on power supply 12 hours before test run in order to protect compressor.
• For specific models which require higher ceiling settings or auto-recovery feature from power failure, make proper changes of
settings referring to the description of “11. FUNCTION SETTING”.
Make sure to read operation manual before test run. (Especially items to secure safety.)
10-1. TROUBLESHOOTING
<Check code displayed by self-diagnosis and actions to be taken for service (summary)>
Present and past check codes are logged, and they can be displayed on the control board of outdoor unit. Actions to be taken
for service, which depends on whether or not the trouble is reoccurring in the field, are summarized in the table below. Check
the contents below before investigating details.
Unit conditions at service Check code Actions to be taken for service (summary)
The trouble is reoccurring.
Displayed
Judge the problem and take a corrective action according
to “10-4. SELF-DIAGNOSIS ACTION TABLE”.
Not displayed
Conduct troubleshooting and ascertain the cause of the
trouble according to “10-5. TROUBLESHOOTING OF
PROBLEMS”.
The trouble is not reoccurring.
Logged
1Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise, etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, weather when the
trouble occurred, matters related to wiring, etc.
2Reset check code logs and restart the unit after finishing
service.
3There is no abnormality in electrical component,
controller board, remote controller, etc.
Not logged
1Re-check the abnormal symptom.
2Conduct troubleshooting and ascertain the cause of the
trouble according to “10-5. TROUBLESHOOTING OF
PROBLEMS”.
3Continue to operate unit for the time being if the cause
is not ascertained.
4There is no abnormality concerning of parts such as
electrical component, controller board, remote controller,
etc.

18
OCH665B
F1 F2 F3 F4
Test run menu
Cursor
Service menu:
Test run
Drain pump test run
1Select "Service" from the Main menu, and press the [ ] button.
2Select "Test run" with the F1 or F2 button, and press the [] button.
Select "Test run" with the F1 or F2 button, and press the [ ] button.
F1 F2 F3 F4
Cool Pipe Auto
Switch disp.
Mode Fan
RemainTest run
Remain
Vane
Test run
F1 F2 F3 F4
Cool mode: Check the cold air blows out.
Heat mode: Check the heat blows out.
Press the F1 button to go through the operation modes in the order of "Cool
and Heat".
Check the auto vane with the F1 F2 buttons.
Press the [ ] button to return to “Test run operation”.
Press the button.
When the test run is completed, the “Test run menu” screen will appear.
The test run will automatically stop after 2 hours.
Test run operation
Auto vane check
Press the [ ] button and open the Vane setting screen.
Function buttons
F1 F2 F3 F4
MENU RETURN SELECT ON/OFF
10-2-1. Test run for wired remote controller <PAR-4xMAA ("x" represents 0 or later)>
Check the operation of the outdoor unit’s fan.
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Test run
Input maintenance info.
Settings
Check
Others
F1 F2 F3 F4
F1 F2 F3 F4
F1 F2 F3 F4

19
OCH665B
Error information
Error code A3
Error unit IU
Time Occurred
Model name
Serial No.
ResetPage
2 / 1
Unit#1
4:48
Reset error: Reset button
Error information
Error code A3
Error unit IU
Time Occurred
Model name
Serial No.
ResetPage
2 / 1
Unit#1
4:48
Reset error: Reset button
Error information
Contact information
Dealer
Tel
ResetPage
Reset error: Reset button
Error reset
Error reset
Main menu:
Error reset
Reset current error?
OKCancel
F1 F2 F3 F4
1Check code, error unit, refrigerant address, unit model name, and
serial number will appear. (Date and time of occurrence of the er-
ror will also appear on PAR-4xMAA.)
The model name and serial number will appear only if the informa-
tion has been registered.
Press the F1 or F2 button to go to the next page.
When an error occurs, the following screen will appear.
Check the error status, stop the operation, and consult your dealer.
Contact information (dealer's phone number) will appear if
the information has been registered.
2Press the F4 button or the [ ] button to reset the er-
ror that is occurring.
Errors cannot be reset while the ON/OFF operation is prohibited.
Select "OK" with the F4 button.
Navigating through the screens
• To go back to the Main menu .......... [ ] button
<Error information>
blinks
F1 F2 F3 F4
blinks
F1 F2 F3 F4

20
OCH665B
Main menu:
Cursor
Maintenance menu
Error information
Filter information
Cleaning
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Test run
Input maintenance info.
Settings
Check
Others
While no errors are occurring, page 2/2 of the error information
can be viewed by selecting "Error information" from the Mainte-
nance menu (PAR-4xMAA) or Main menu (PAR-3xMAA).
Errors cannot be reset from this screen.
<Checking the error information>
<Error history>
F1 F2 F3 F4
Check menu
Cursor
Service menu:
Error history
Diagnosis
Smooth maintenance
Request code
F1 F2 F3 F4
Error history
Page Delete
Check menu:
Error Unt# dd/ mm /yy
Error history
Cancel OK
Delete error history?
Error history
Check menu:
Error history deleted
2Select "Error history" with the F1 or F2 button, and press
the [ ] button.
Select "Check" with the F1 or F2 button, and press the [ ] button.
3Select "Error history" from the Check menu, and press the [ ] button to
view up to 16 error history records.
4 records are shown per page, and the top record on the rst page indicates
the latest error record.
Error history
4To delete the error history, press the F4 button (Delete) on the screen that
shows error history.
A conrmation screen will appear asking if you want to delete the error history.
Press the F4 button (OK) to delete the history.
"Error history deleted" will appear on the screen.
Press the [ ] button to go back to the Check menu screen.
Deleting the error history
1Select "Service" from the Main menu, and press the [ ] button.
F1 F2 F3 F4
F1 F2 F3 F4
F1 F2 F3 F4