Mitsubishi Electric PUHZ-P200YHA User manual

SERVICE MANUAL
No. OCH424
REVISED EDITION-E
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R410A
October 2011
Outdoor unit
[Model names]
PUHZ-P200YHA
PUHZ-P250YHA
PUHZ-P200YHA3
PUHZ-P250YHA3
[Service Ref.]
PUHZ-P200YHA
PUHZ-P250YHA
PUHZ-P200YHA3
PUHZ-P200YHA3R1
PUHZ-P200YHA3R2
PUHZ-P200YHA3R3
PUHZ-P250YHA3
PUHZ-P250YHA3R1
PUHZ-P250YHA3R2
PUHZ-P250YHA3R3
PUHZ-P200YHA3R1/R2/R3
PUHZ-P250YHA3R1/R2/R3
Note:
•This manual describes only
service data of the outdoor units.
• RoHS compliant products have
<G> mark on the spec name plate.
CONTENTS
1. TECHNICAL CHANGES................................. 2
2. REFERENCE MANUAL.................................. 2
3. SAFETY PRECAUTION.................................. 3
4. FEATURES...................................................... 6
5. SPECIFICATIONS........................................... 7
6. DATA...............................................................8
7. OUTLINES AND DIMENSIONS.................... 10
8. WIRING DIAGRAM.......................................12
9. WIRING SPECIFICATIONS..........................13
10. REFRIGERANT SYSTEM DIAGRAM............... 18
11. TROUBLESHOOTING...................................20
12. FUNCTION SETTING.................................... 70
13. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER
.... 77
14. EASY MAINTENANCE FUNCTION..............87
15. DISASSEMBLY PROCEDURE..................... 90
PARTS CATALOG (OCB424)
Revision:
• "11-10 FUNCTION OF SWITCHES,
CONNECTORS AND JUMPERS"
has been modified in REVISED
EDITION-E. (See page 65)
•Some descriptions have been
modified.
•Please void OCH424
REVISED EDITION-D.

2
2REFERENCE MANUAL
Model name Service Ref.
Service
Manual No.
PLA-RP35/50/60/71/100/125/140BA
PLA-RP71/100/125/140BA2 PLA-RP35/50/60/71/100/125/140BA(#2).UK PLA-RP35/50/60/71BA
1 .UK
PLA-RP71/100/125BA2.UK
PLA-RP140BA2R1.UK
OCH412
OCB412
PCA-RP71/125HA OC329 PCA-RP71/125HA(#1)
PCA-RP50/60/71/100/125/140GA PCA-RP50/60/71/100/125/140GA(#1) OC328
PCA-RP50GA2 PCA-RP50GA2(#1)
PKA-RP35/50GAL PKA-RP35/50GAL(#1) OC330
PKA-RP60/71/100FAL PKA-RP60/71/100FAL(#1)
PKA-RP50FAL2 PKA-RP50FAL2(#1) OC331
PEAD-RP60/71/100GA PEAD-RP60/71/100GA(#1).UK HWE0506
PEA-RP200/250/400/500GA PEA-RP200/250/400/500GA.TH-AF
PEA-RP200/250GA.TH-AFMF HWE0708A
PEAD-RP50/60/71/125/140EA
PEAD-RP35/100EA2 PEAD-RP50/60/71/125/140EA(#1).UK PEAD-RP35/100EA2(#1).UK HWE0521
PKA-RP60/71/100KAL PKA-RP60/71/100KAL.TH OCH452
OCB452
PCA-RP50/60/71/100/125/140KA PCA-RP50/60/71/100/125/140KA OCH454
OCB454
PKA-RP35/50HAL PKA-RP35/50HAL OCH453
OCB453
PLA-RP100BA3 PLA-RP100BA3 OCH459
OCB459
PEAD-RP35/50/60/71/100/125/140JA(L) PEAD-RP35/50/60/71/100/125/140JA(L)(R1).UK HWE08130
BWE08240
BWE09220
INDOOR UNIT’S SERVICE MANUAL
1TECHNICAL CHANGES
PUHZ-P200YHA3R2 PUHZ-P200YHA3R3
PUHZ-P250YHA3R2 PUHZ-P250YHA3R3
• The mounting location of CHARGE PLUG has been changed.
• THERMISTOR has been changed (Discharge, black →Shell, white (These are compatible)).
• The part numbers have been modified. (The parts that are new numbers are compatible with old numbers)
<For all models> FRONT PANEL, TOP PANEL, FUSE (F3, 4)
<For 200Y models> ACCUMULATOR
PUHZ-P200YHA3R1 PUHZ-P200YHA3R2
PUHZ-P250YHA3R1 PUHZ-P250YHA3R2
• POWER BOARD (P.B.) has been changed.
• CONTROLLER BOARD (C.B.) has been changed. (S/W version up)
PUHZ-P200YHA3 PUHZ-P200YHA3R1
PUHZ-P250YHA3 PUHZ-P250YHA3R1
• FAN GRILLES and FRONT PANEL have been changed.
PUHZ-P200YHA PUHZ-P200YHA3
PUHZ-P250YHA PUHZ-P250YHA3
• OUTDOOR CONTROLLER BOARD (C.B.) has been changed.
(S/W has been changed: Corresponding to the additional combination between PKA-RP•HAL/KAL, PCA-RP•KA and PEAD-RP•JA(L))
OCH424E

3
3SAFETY PRECAUTION
Cautions for units utilizing refrigerant R410A
3-2. CAUTIONS RELATED TO NEW REFRIGERANT
Use new refrigerant pipes.
Store the piping to be used indoors during
installation, 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 com-
pressor.
If large amount of mineral oil enters, that can cause deterio-
ration of refrigerant oil etc.
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.
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.
3-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
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.
Preparation for 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 breaker.
· Discharge the condenser before the work involving the
electric parts.
OCH424E

4
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 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
[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.)
OCH424E

5
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.)
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 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.
3Tools 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
24.0
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
36.0
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
Charge refrigerant
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, ether oil and
alkylbenzene oil
(minimum amount)
Tool exclusive for R410A
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adop-
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 adopter for rever-
se flow)
(Usable by adjusting
flaring dimension)
Can R407C tools be used?
Ester oil, ether oil:
Alkylbenzene oil: minimum amount
(Usable if equipped
with adopter 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
OCH424E

6
4FEATURES
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. (Max. 30m)
The refrigerant circuit with LEV (Linear Expansion Valve) and Accumulator always control the optimal refrigerant level regard-
less of the length (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-P200YHA
PUHZ-P250YHA
PUHZ-P200YHA3
PUHZ-P250YHA3
PUHZ-P200YHA3R1
PUHZ-P250YHA3R1
PUHZ-P200YHA3R2
PUHZ-P250YHA3R2
PUHZ-P200YHA3R3
PUHZ-P250YHA3R3
OCH424E

7
5SPECIFICATIONS
A
A
kW
W
kW
*
/min(L/s )
dB
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
L
mm(in.)
mm(in.)
Power supply (phase, cycle, voltage)
Running current
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
Mode
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Service Ref.
PUHZ-P250YHA
PUHZ-P250YHA3
PUHZ-P250YHA3R1
PUHZ-P250YHA3R2
PUHZ-P250YHA3R3
PUHZ-P200YHA
PUHZ-P200YHA3
PUHZ-P200YHA3R1
PUHZ-P200YHA3R2
PUHZ-P200YHA3R3
Cooling
9.47
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
YHA: ANB52FFJMT or ANB52FFPMT
YHA3(R1, R2, R3): ANB52FFPMT
Line start
—
Plate fin coil
Propeller fan %2
0.150 + 0.150
130(2170)
Reverse cycle
950(37-3/8)
330 + 30(13+1-3/16)
1,350(53-1/8)
R410A
2.30(FV50S)
Flared
Flared & Brazing
Max. 30m
Max. 70m
Heating
9.88
Cooling
11.0 21
5.5
Heating
12.0
HP switch
Discharge thermo
3 phase 50Hz, 400V
OUTDOOR UNIT
REFRIGERANT PIPING
4.7
19
59
59
126(278)
5.8(12.8)
9.52(3/8)
25.4(1)
59
59
YHA, YHA3R3: 133(294)/
YHA3(R1,R2): 135(298)
7.1(15.7)
12.7(1/2)
25.4(1)
OCH424E

8
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUHZ-P200YHA
PUHZ-P250YHA
PUHZ-P200YHA3(R1/R2/R3)
PUHZ-P250YHA3(R1/R2/R3)
COOLING
MODE
HEATING
59
SPL(dB)
59
LINE
6DATA
6-1. REFILLING REFRIGERANT CHARGE (R410A : kg)
6-2. COMPRESSOR TECHNICAL DATA
Piping length (one way)
10m 20m 30m 40m 50m Factory
charged
4.8
5.9
5.3
6.5
5.8
7.1
6.7
8.3
7.6
9.5
60m
8.5
10.7
70m
9.4
11.9
5.8
7.1
Service Ref.
PUHZ-P200YHA
PUHZ-P200YHA3
PUHZ-P200YHA3R1
PUHZ-P200YHA3R2
PUHZ-P200YHA3R3
PUHZ-P250YHA
PUHZ-P250YHA3
PUHZ-P250YHA3R1
PUHZ-P250YHA3R2
PUHZ-P250YHA3R3
U-V
U-W
W-V
Unit
Compressor model
Winding
Resistance
()
(at 20°C)
ANB52FFJMT
ANB52FFPMT
0.30
0.30
0.30
PUHZ-P200, 250YHA
PUHZ-P200, 250YHA3
PUHZ-P200, 250YHA3R1
PUHZ-P200, 250YHA3R2
PUHZ-P200, 250YHA3R3
ANB52FFPMT
0.30
0.30
0.30
For pipe longer than 30 m,
additional charge is required.
6-3. NOISE CRITERION CURVES
1.5m
1m
MICROPHONE
UNIT
GROUND
OCH424E

9
PEA-RP250GAPEA-RP200GA
PEA-RP250GA
PEA-RP200GA
3, 50
3, 50
400
400
1.18
1.00
2.302.00
PUHZ-P250YHA
PUHZ-P250YHA3
PUHZ-P250YHA3R1/R2/R3
PUHZ-P200YHA
PUHZ-P200YHA3
PUHZ-P200YHA3R1/R2/R3
3, 503, 50
400
400
HeatingCooling
HeatingCooling
12.011.0
9.889.47
19,000 22,400 22,000 27,000
7.21 7.36 8.44 8.47
74.074.873.775.6
45.149.643.249.7
-2.37.1
-0.88.0
7.57.5
7.57.5
2027
2027
1519
1519
39.115.4
35.717.1
735
735
624
624
0.86
0.81
0.150.18
—
—
—
—
2.67
(27.2)
2.94
(30.0)
2.96
(30.2) 2.59 (26.4) 0.62
(6.32)
0.86
(8.75)
0.87
(8.87) 0.64 (6.53)
Electrical circuitRefrigerant circuitIndoor side
Outdoor
side
Representative matching
SHF
BF
Mode
Capacity
Input
Total
(kgf/%)
(kgf/%)
Phase , Hz
Voltage
Input
Current
Outdoor unit
Phase , Hz
Voltage
Current
Discharge pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Ref. pipe length
Intake air temperature
Discharge air temperature
Intake air temperature
V
kW
A
V
A
MPa
MPa
°C
°C
°C
m
°C
°C
°C
°C
°C
Indoor unit
D.B.
W.B.
D.B.
D.B.
W.B.
W
kW
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is: 1(MPa)=10.2(kgf/cm²)
6-4. STANDARD OPERATION DATA
OCH424E

10
Rear piping cover
Front piping cover
Side Air Intake
Handle for moving
Piping Knockout Hole Details
637323 5527
92
65
4045
Power supply wiring hole (2-:27Knockout)
Rear trunking hole (Knockout)
Rear piping hole (Knockout)
:92
922723
6373
4075
92
5519
Power supply wiring hole (2-:27Knockout)
Right trunking hole (Knockout)
Right piping hole (Knockout)
:92
637323 5527
40 45
65
92
Power supply wiring hole (2-:27Knockout)
Front trunking hole (Knockout)
Front piping hole (Knockout)
:92
Over
Over
Over
Over
Less than
Piping and wiring connections can be made from 4 directions: front, right, rear and below.
4 PIPING-WIRING DIRECTIONS
3 FOUNDATION BOLTS2 SERVICE SPACE
1 FREE SPACE (Around the unit)
Please secure the unit firmly with 4 foundation (M10) bolts. (Bolts and washers must be purchased locally.)
<Foundation bolt height>
Dimensions of space needed for service access are shown in the below diagram.
The diagram below shows a basic example. Explanation of particular details are given in the installation manuals etc.
30
FOUNDATION
10
500
500 150
Service space
FREE
Over 10mm
Over 10mm
Over 150mm
Over 1000mm
53 40
56
0
70
175600175
33030
37028 19
417
60 37
2-12%36 oval holes (Foundation Bolt M10)
2-U Shaped notched holes (foundation Bolt M10)
Side Air Intake
Rear Air Intake
Air Discharge
Installation Feet
999
995
*1 A
*2 339
950
322
23 371 635
1350
*1 439
Handle for moving
Handle for moving
Terminal Connections Left···Power supply wiring Right···Indoor/Outdoor wiring
Service Panel
(
Earth terminal
Brazing


)
PUHZ-P250YHA PUHZ-P250YHA3 PUHZ-P200YHA PUHZ-P200YHA3 :9.52
(3/8 inch)
:12.7
(1/2 inch) 421
A
447

· · · ·Refrigerant GAS pipe connection (FLARE):19.05 (3/4 inch)
· · · ·Refrigerant LIQUID pipe connection (FLARE)
*1· · · ·Indication of STOP VALVE connection location *2· · · ·Refrigerant GAS PIPE connection(BRAZING) O.D:25.4
Example of Notes
14514514522030
81 219
71
71
Drain hole (5-:33)
Bottom piping hole (Knockout)
Side Air Intake
Air Intake
Rear Air Intake
Handle for moving
Handle for moving
PUHZ-P200YHA
PUHZ-P250YHA
PUHZ-P200YHA3
PUHZ-P250YHA3
Unit : mm
7 OUTLINES AND DIMENSIONS
OCH424E

11
Rear piping cover
Front piping cover
Side Air Intake
Handle for moving
Piping Knockout Hole Details
637323 5527
92
65
4045
Power supply wiring hole (2-:27Knockout)
Rear trunking hole (Knockout)
Rear piping hole (Knockout)
:92
922723
6373
4075
92
5519
Power supply wiring hole (2-:27Knockout)
Right trunking hole (Knockout)
Right piping hole (Knockout)
:92
637323 5527
40 45
65
92
Power supply wiring hole (2-:27Knockout)
Front trunking hole (Knockout)
Front piping hole (Knockout)
:92
Over
Over
Over
Over
Less than
Piping and wiring connections can be made from 4 directions: front, right, rear and below.
4 PIPING-WIRING DIRECTIONS
3 FOUNDATION BOLTS2 SERVICE SPACE
1 FREE SPACE (Around the unit)
Please secure the unit firmly with 4 foundation (M10) bolts. (Bolts and washers must be purchased locally.)
<Foundation bolt height>
Dimensions of space needed for service access are shown in the below diagram.
The diagram below shows a basic example. Explanation of particular details are given in the installation manuals etc.
30
FOUNDATION
10
500
500 150
Service space
53 40
56
0
70
175600175
33030
37028 19
417
60 37
2-12%36 oval holes (Foundation Bolt M10)
2-U Shaped notched holes (foundation Bolt M10)
Side Air Intake
Rear Air Intake
Air Discharge
Installation Feet
999
995
*1 A
*2 339
950
322
23 371 635
1350
*1 439
Handle for moving
Handle for moving
Terminal Connections Left···Power supply wiring Right···Indoor/Outdoor wiring
Service Panel
(
Earth terminal
Brazing


)
PUHZ-P250YHA3R1 PUHZ-P250YHA3R2 PUHZ-P250YHA3R3 PUHZ-P200YHA3R1 PUHZ-P200YHA3R2 PUHZ-P200YHA3R3
:9.52
(3/8 inch)
:12.7
(1/2 inch) 421
A
447

· · · ·Refrigerant GAS pipe connection (FLARE):19.05(3/4 inch)
· · · ·Refrigerant LIQUID pipe connection (FLARE)
*1· · · ·Indication of STOP VALVE connection location *2· · · ·Refrigerant GAS PIPE connection (BRAZING) O.D:25.4
Example of Notes
14514514522030
81 219
71
71
Drain hole (5-:33)
Bottom piping hole (Knockout)
Side Air Intake
Air Intake
Rear Air Intake
Handle for moving
Handle for moving
Over 10mm Over 10mm
Over 150mm
Over 1000mm
FREE
PUHZ-P200YHA3R1
PUHZ-P250YHA3R1
PUHZ-P200YHA3R2
PUHZ-P250YHA3R2
PUHZ-P200YHA3R3
PUHZ-P250YHA3R3
OCH424E

12
PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3
PUHZ-P200YHA3R1 PUHZ-P250YHA3R1 PUHZ-P200YHA3R2 PUHZ-P250YHA3R2
PUHZ-P200YHA3R3 PUHZ-P250YHA3R3
TH7/6
(RED) TH3 (WHT) TH4 (WHT)
TH7TH6 TH3 TH4
412121
t° t° t° t°
63H
LEV-A
(WHT)
LEV-A
M
LED1
LED2
61 CNVMNT
(WHT)
31 CNMNT
(WHT)
CNM
(WHT)
51
35 5
141
63H
(YLW)
31
CN2
(WHT) 7
7
1
CN2
(WHT)
7
7
1
CNDM
(WHT) CN3S
(WHT)
CN51
(WHT) 131315
X51 X52
SW7
SW6SW1
SW9
CN31
+1+1
SW5SW8SW4
SWP
CN4
(WHT)
12
1313
2
21S4
SS
(WHT)
21S4
(GRN)
CNAC
(WHT)
F4
F3
21
43
2
3
1CNDC
(PNK)
CNS
(WHT)
31
TRANS
CNF1
(WHT)
CNF2
(WHT)
MF1
MS
3~
7
1
7
1
MF2
MS
3~
C. B.
P. B.
CN5
(WHT)
31
LED2
SW1
SW11
SW12
LED3
LED4
TB7
LED1 LED5
2
1CND
(WHT)
CN2M
(WHT)
M-NETADAPTER
M-NET
ABS
When M-NET adapter is connected
3
5
1
2
2
1
2
2
1
CN4
(WHT)
CN5
(RED)
WHT
FUSE1 FUSE2
WHT
REDRED
MS
3~
POWER
SUPPLY
3N~
400V 50Hz
INDOOR
UNIT
TB1
L3
L2
L1
N
U
U
UU
U
31
2
2
13
CNDC
(PNK) CNL (BLU)
3112
CNCT
(RED) CNAC2 (RED)
31
CNAC1
(WHT)
BLK BLK
WHT WHT
U
LO 1
LO 2
LO3
LI 1
LI 2
LI 3
NI
RED
WHT
BLU
BLK
GRN/YLW
GD2GD1
RED
WHT
BLK
N. F.
TB2
DCL
ACL4
S3
S2
S1
ORN YLW
CY2 CY1
BRN
RED
RED
RS
RED
WHT
WHT
WHT
BLK
BLK
BLK X52A
BLK
BLK
TB-P2
TB-P1 TB-C1 TB-N1
CB1 CB2
W
V
MC
U
TB-L1
TB-L2
TB-L3
SC-U
SC-V
SC-W
RED
MODEL SW6
+1 MODEL SELECT SW5-6 +2
12345678
+2 SW5 -1 to 5 : Function Switch
OFF
123456
OFF
ON
200YHA
200YHA3
200YHA3R1
ON
12345678
OFF
123456
OFF
ON ON
12345678
OFF
123456
OFF
ON
200YHA3R2
200YHA3R3
ON
12345678
OFF
123456
OFF
ON
250YHA3R2
250YHA3R3
ON
250YHA
250YHA3
250YHA3R1
FUSE1, FUSE2
Connector<Connection for Option>
CN51
Relay
X51,X52
Connector<Connection for Option>
CN3S
TB1
MC
MF1,MF2
21S4
63H
TH3
TH4
TH6
TH7
LEV-A
DCL
Terminal Block<Power Supply>
TB2 Terminal Block<Indoor/Outdoor>
Motor for Compressor
Fan Motor
Solenoid Valve (Four-Way Valve)
High Pressure Switch
Thermistor<Outdoor Pipe>
SC-U/V/W
TB-L1/L2/L3
Connection Terminal<U/V/W-Phase>
Thermistor<Discharge>
Thermistor<Outdoor 2-Phase Pipe>
Thermistor<Outdoor>
Fuse<
T15AL250V>
Capacitor
Electronic Expansion Valve
Reactor
ACL4 Reactor
Connection Terminal<L1/L2/L3-Power supply>
P.B.
Power Circuit Board
RS
Rush Current Protect Resistor
CB1,CB2
CY1,CY2
Main Smoothing Capacitor
Connection Terminal
Noise Filter Circuit Board
Connection Terminal<
L1/L2/L3/NI-Power supply>
Connection Terminal<Ground>
52C Relay
N.F.
LI1/ LI2/LI3/NI
LO1/ LO2/LO3
Connection Terminal< L1/L2/L3-Power supply>
GD1,GD2
Controller Circuit Board
C.B.
TB-C1
X52A
Connection Terminal TB-N1
SYMBOL
[LEGEND] NAME SYMBOL NAME SYMBOL NAME
Connection Terminal
TB-P1
Connection Terminal
TB-P2
Switch<Function Setup>
Switch<Function Setup>
Switch<Forced Defrost, Defect History Record
Reset, Refrigerant Address>
Switch<Test Operation>
Switch<Function Switch>
Switch<Model Select>
SW7
SW1
SW4
SW5
SW6
SW8
Switch
SW9
Switch<Pump Down>
SWP
Connector<Emergency Operation>
LED<Operation Inspection Indicators>
CN31
F3,F4
CNMNT
CNVMNT
CNDM
Connector
< Connected for Option (Contact Input)>
Fuse< T6.3AL250V>
LED1,LED2
CNM
Connector<A-Control Service Inspection Kit>
SS
Connector<Connection for Option>
Connector
<Connected to Optional M-NETAdapter Board>
Connector
<Connected to Optional M-NETAdapter Board>
Terminal Block(M-NET connection)
Connector<Transmission>
Connector<Power Supply>
LED<Power Supply:DC5V>
LED<Power Supply:DC12V>
LED<Connection to Outdoor Unit>
LED<Transmission:Sending>
LED<Transmission:Receiving>
Connector<M-NET communication>
SYMBOL NAME
Switch<Address setting:2nd digit>
Switch<Status of communication>
Switch<Address setting:1st digit>
TB7
CN5
CND
CN2M
SW1
SW11
SW12
LED1
LED2
LED3
LED4
LED5
M-NETADAPTER
The black square (■) indicates a switch position.
8 WIRING DIAGRAM
OCH424E

13
9 WIRING SPECIFICATIONS
9-1. FIELD ELECTRICAL WIRING (power wiring specifications)
S1
S2
S3
S1
S2
S3
A-Control
Outdoor Unit
3 poles isolator
400V
3 phase
Isolator
A-Control
Indoor Unit
P200, P250
Outdoor unit model P200, 250
Outdoor unit
Power supply Phase Frequency & Voltage 3N~(3ph 4-wires), 50 Hz, 400 V
Outdoor unit input capacity *1
Main switch (Breaker) 32 A
Outdoor unit power supply 5 %Min. 4
Indoor unit-Outdoor unit *2 Cable length 50 m : 3 %4 (Polar)/Cable length 80 m : 3 %6 (Polar)
Indoor unit-Outdoor unit earth 1 %Min. 2.5
Remote controller-Indoor unit *3 2 %0.3 (Non-polar)
Wiring
Wire No. %
size(mm²)
Circuit rating
Outdoor unit L1-N, L2-N, L3-N AC 230 V
Indoor unit-Outdoor unit S1-S2 *4 AC 230 V
Indoor unit-Outdoor unit S2-S3 *4 DC 24 V
Remote controller-Indoor unit *4 DC 12 V
*1 A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
*2 Max. 80 m Total Max. including all indoor/indoor connection is 80 m.
Use one cable for S1 and S2 and another for S3 as shown in the picture.
Max. 50m Total Max. for PEA-200, 250, 400, 500
Wiring size 3%1.5 (Polar)
*3 The 10 m wire is attached in the remote controller accessory.
*4 The figures are NOT against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cords and Indoor unit/Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord.
(Design 60245 IEC 57)
3. Use an earth wire which is longer than the other cords so that it will not become disconnected when tension is applied.
Warning:
In 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.
Caution: Be sure to install N-line. Without N-line, it could damage the unit.

Earth leakage breaker
wiring circuit breaker or
isolating switch
1
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
Outdoor
unit
L3
L2
L1
N
Earth leakage breaker
wiring circuit breaker or
isolating switch
1
21
21
2
S1
S2
S3
S1
S2
S3
S1
S2
S3
S1
S2
S3
Indoor/outdoor
connection cable
Indoor
unit Indoor unit
Indoor
unit
Remote
controller
Unit
power
supply
Outdoor
unit
L3
L2
L1
N 
Synchronized twin and triple system Electrical wiring
• Synchronized twin • Synchronized triple
OCH424E

14
<For models without heater>
*The optional indoor power supply terminal kit is required.
* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.
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
* There are 3 types of labels (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









Simultaneous twin/triple/four system
* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.
Outdoor unit power supply
Earth leakage breaker
Wiring circuit breaker or isolating switch
Outdoor unit
Indoor unit/outdoor unit connecting cables
Remote controller
Indoor unit
Option
Indoor unit power supply
*1. A breaker with at least 3.0 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. Max. 120 m
*3. The 10 m wire is attached in the remote controller accessory. Max. 500 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 longer than other cables.
Indoor unit model
Indoor unit power supply
Indoor unit input capacity *1
Main switch (Breaker)
Indoor unit power supply
Indoor unit power supply earth
Indoor unit-Outdoor unit *2
Indoor unit-Outdoor unit earth
Remote controller-Indoor unit *3
Indoor unit L-N *4
Indoor unit-Outdoor unit S1-S2 *4
Indoor unit-Outdoor unit S2-S3 *4
Remote controller-Indoor unit *4
RP35~140
~/N (single), 50 Hz, 230 V
16A
2%Min. 1.5
1%Min. 1.5
2%Min. 0.3
–
2%0.3 (Non-polar)
AC 230 V
–
DC24 V
DC12 V
Circuit
rating
Wiring
Wire No. %size
(mm
2
)
Indoor unit earth











L
N
L
N
S1
S2
S3
S1
S2
S3
1
2
L
N
S1
S2
S3
1
2
L
N
S1
S2
S3
1
2
L
N
S1
S2
S3
1
2
  
9-2. SEPARATE INDOOR UNIT/ OUTDOOR UNIT POWER SUPPLIES
S1
S2
S3
Indoor/outdoor
unit connection
cable
Indoor
unit
Unit
power
supply
Unit
power
supply
Outdoor
unit
L1
L2
L3

N
S1
S2
S3
L1
L2
L3
N


1
2Remote
controller
Earth leakage breaker
wiring circuit breaker or
isolating switch
1:1 System (Indoor : PEA-200, 250) 1:2 System (Indoor : PEA-400, 500)
S1
S2
S3
Indoor/outdoor
unit connection
cable
Indoor
unit
Unit
power
supply
Unit
power
supply
Outdoor
unit No.1
L1
L2
L3

N
S1
S2
S3
L1
L2
L3
N
Earth leakage breaker
wiring circuit breaker or
isolating switch


S1
S2
S3
Indoor/outdoor
unit connection
cable
TB4-1
TB4-2
Unit
power
supply
Outdoor
unit No.2
L1
L2
L3

N
S1
S2
S3

1
2Remote
controller
OCH424E

15
9-3. INDOOR – OUTDOOR CONNECTING CABLE
Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections).
Intermediate connections can lead to communication errors if water enters the cables and causes insufficient
insulation to earth or a poor electrical contact at the intermediate connection point.
Indoor unit-Outdoor unit
Indoor/Outdoor separate
power supply Max. 120m
2%Min. 0.3
—
Indoor unit-Outdoor unit earth
Wire No. %Size ($)
+The optional indoor power supply terminal kit is necessary.
WIRING SPECIFICATIONS FOR 220-240 V 50 Hz
(INDOOR-OUTDOOR CONNECTING CABLE)
Cross section of cable Wire size (mm2) Number of wires Polarity L (m)*6
Round 2.5 3 Clockwise : S1-S2-S3
* Pay attention to stripe of yellow and green. (30)
*2
Flat 2.5 3 Not applicable
(Because center wire has no cover finish) Not applicable
*5
Flat 1.5 4 From left to right : S1-Open-S2-S3 (18)
*3
Round 2.5 4 Clockwise : S1-S2-S3-Open
*Connect S1 and S3 to the opposite angle. (30)
*4
*1 : Power supply cords of appliances shall not be lighter than design 60245 IEC or
227 IEC.
*2 : In case that cable with stripe of yellow and green is available.
*3 : In case of regular polarity connection (S1-S2-S3), wire size is 1.5 mm².
*4 : In case of regular polarity connection (S1-S2-S3).
*5 : In the flat cables are connected as this picture, they can be used up to 30 m. *6 : Mentioned cable length is just a reference value. It may be different depending on the condition of installation, Humidity
or materials, etc.
(3C Flat cable × 2)
OCH424E

16
9-4. M-NET WIRING METHOD
(Points to note)
(1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from
making an influence on the signal communication. Place them at intervals of more than 5 cm. Do not put them in the same
conduit tube.
(2) Terminal block (TB7) for transmission wires should never be connected to 220~240 V power supply. If it is connected,
electronic parts on M-NET P.C. board may burn out.
(3) Use 2-core × 1.25 mm² shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or
received normally if different types of transmission wires are put together in the same multi-conductor cable. Never do this
because this may cause a malfunction.
It would be ok if M-NET wire (non-polar, 2-cores) is arranged in addition to the wiring for A-control.
(4) Earth only one of any appliances through M-NET transmission wire (shield wire). Communication error may occur due to
the influence of electromagnetic noise.
“Ed” error will appear on the LED display of outdoor unit.
“0403” error will appear on the central-control remote controller.
If there are more than 2 earthing spots on the shield wire, noise may enter into the shield wire because the earth wire and
shield wire form 1 circuit and the electric potential difference occurs due to the impedance difference among earthing spots.
In case of single spot earthing, noise does not enter into the shield wire because the earth wire and shield wire do not form
1 circuit.
To avoid communication errors caused by noise, make sure to observe the single spot earthing method described in the
installation manual.
Group
remote
controller
Refrigerant
address 00
M-NET
address 01
A-control
remote
controller
A-control
remote
controller
A-control
remote
controller
Refrigerant
address 00
M-NET
address 02
Refrigerant
address 00
M-NET
address 03
Power
supply
unit for
transmission
wire
Central
remote
controller
M-NET transmission wire
×Bad example (Multi spot earthing of shield wire)
Good example 1 (Single spot earthing of shield wire)
Power
supply
appliance M-NET type
outdoor unit
Central
remote
controller
Power
supply
appliance M-NET type
outdoor unit
M-NET type
outdoor unit M-NET type outdoor unit
M-NET transmission wire
M-NET type
outdoor unit M-NET type outdoor unit
Central
remote
controller
Power
supply
appliance M-NET type
outdoor unit
M-NET transmission wire
M-NET type
outdoor unit M-NET type outdoor unit
Good example 2 (Single spot earthing of shield wire)
OCH424E

17
9-4-3. Regulations in address settings
In case of multiple grouping system, M-NET and refrigerant address settings should be done as explained in the above sec-
tion. Set the lowest number in the group for the outdoor unit whose refrigerant address is “00” as its M-NET address.
wRefrigerant addresses can be overlapped if they are in the different group.
wIn group B, M-NET address of the outdoor unit whose refrigerant address is “00” is not set to the minimum in the group. As
“3” is right for this situation, the setting is wrong. Taking group A as a good sample, set the minimum M-NET address in the
group for the outdoor unit whose refrigerant address is “00”.
9-4-1. M-NET address setting
In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to CITY MULTI
system, there is no need to set the address of outdoor unit and remote controller. To construct a central control system, the
setting of M-NET address should be conducted only upon the outdoor unit. The setting range should be 1 to 50 (the same as
that of the indoor unit in CITY MULTI system), and the address number should be consecutively set in a same group.
Address number can be set by using rotary switches
(SW11 for ones digit and SW12 for tens digit), which
is located on the M-NET board of outdoor unit.
(Initial setting: all addresses are set to “0”.)
9-4-2. Refrigerant address setting
In case of multiple grouping system (multiple refrigerant circuits in one group), indoor units should be connected by remote
controller wiring (TB5) and the refrigerant address needs to be set. Leave the refrigerant addresses to “00” if the group set-
ting is not conducted. Set the refrigerant address by using DIP SW1-3 to -6 on the outdoor controller board. [Initial setting: all
switches are OFF. (All refrigerant addresses are “00”.)]
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
12
~
50
M-NETAddress No. <Setting example>
Switch
setting
SW11
ones
digit
SW12
tens
digit
OFF
ON
123456123456123456123456123456123456123456123456
123456 123456 123456 123456 123456 123456 123456 123456
0
Refrigerant
address
OFF
ON
8
OFF
ON
1
OFF
ON
9
OFF
ON
10
OFF
ON
11
OFF
ON
12
OFF
ON
13
OFF
ON
14
OFF
ON
15
OFF
ON
2
OFF
ON
3
OFF
ON
4
OFF
ON
5
OFF
ON
6
OFF
ON
7
System
controller
A-control
remote
controller
Group A Group B Group C
A-control
remote
controller
TB5
A-control
remote
controller
Refrigerant
address 00
M-NET
address 01
Refrigerant
address 00
M-NET
address 02
Refrigerant
address 01
M-NET
address 03
Refrigerant
address 00
M-NET
address 04
Power
supply
unit for
transmission
wire
A-control
remote
controller
A-control
remote
controller
TB5
Group A Group B
Refrigerant
address 00
M-NET
address 01
Refrigerant
address 01
M-NET
address 02
Refrigerant
address 00
M-NET
address 04
Refrigerant
address 01
M-NET
address 03
Refrigerant
address 02
M-NET
address 05
System
controller
Power
supply
unit for
transmission
wire
●M-NET wiring
(1) Use 2-core × 1.25mm² shield wire for electric wires.
(Excluding the case connecting to system controller.)
(2) Connect the wire to the M-NET terminal block. Connect one core of the
transmission wire (non-polar) to M1 terminal and the other to M2. Peel the
shield wire, twist the shield part to a string and connect it to S terminal.
(3) In the system which several outdoor units are being connected, the terminal
(M1, M2, S) on M-NET terminal block should be individually wired to the other
outdoor unit’s terminal, i.e. M1 to M1, M2 to M2 and S to S. In this case, choose one of those outdoor units and drive a
screw to fix an earth wire on the plate as shown on the right figure.
Transmission
wire Shield part
M-NET
terminal
block Earth
wire
M1 M2 S
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Outdoor heat exchanger
Thermistor
(TH3)
Thermistor
(TH6)
Thermistor
(TH7)
Distributor
Service
port
(check)
Service
port
(check)
Accumulator
Compressor
Refrigerant GAS pipe
:25.4(:1 inch)
Refrigerant LIQUID pipe
P200 : :9.52(:3/8 inch)
P250 : :12.7(:1/2 inch) Stop valve
(with service port)
4-way valve High pressure
protect switch
Linear expansion valve
Thermistor
(TH4)
Muffler
Ball valve
(#50)
Strainer
Strainer
(#40)
Strainer
(#100)
Strainer
(#100)
Strainer
(#100)
Refrigerant flow in cooling
Refrigerant flow in heating
10 REFRIGERANT SYSTEM DIAGRAM
PUHZ-P200YHA PUHZ-P250YHA PUHZ-P200YHA3 PUHZ-P250YHA3
PUHZ-P200YHA3R1 PUHZ-P250YHA3R1 PUHZ-P200YHA3R2 PUHZ-P250YHA3R2
PUHZ-P200YHA3R3 PUHZ-P250YHA3R3
Outdoor heat exchanger
Thermistor
(TH3)
Thermistor
(TH6)
Thermistor
(TH7)
Distributor
Service port
(check)
Service
port
(check)
Accumulator
Compressor
Refrigerant GAS pipe
:25.4(:1 inch)
Refrigerant LIQUID pipe
P200 : :9.52(:3/8 inch)
P250 : :12.7(:1/2 inch) Stop valve
(with service port)
4-way valve High pressure
protect switch
Linear expansion valve
Thermistor
(TH4)
Muffler
Ball valve
(#50)
Strainer
Strainer
(#40)
Strainer
(#100)
Strainer
(#100)
Strainer
(#100)
Refrigerant flow in cooling
Refrigerant flow in heating
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10-1. Refrigerant recovering (pump down)
Perform the following procedures to recover refrigerant while operating the indoor unit or the outdoor unit.
1Turn on the power supply (circuit breaker).
wWhen power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If
“CENTRALLY CONTROLLED” is displayed, the refrigerant recovering (pump down) cannot be completed normally.
2After the liquid stop valve is closed, set the SWP switch on the control board of the outdoor unit to ON. The compressor
(outdoor unit) and fan (indoor and outdoor units) start operating and refrigerant recovering operation begins. LED1 and
LED2 on the control board of the outdoor unit are lit.
w
Set the SWP switch (push-button type) to ON in order to perform refrigerant recovering operation only when the unit is
stopped. However, refrigerant recovering operation cannot be performed until compressor stops even if the unit is stopped.
Wait for 3 minutes until compressor stops and set the SWP switch to ON again.
3Because the unit automatically stops in about 2 to 3 minutes after the refrigerant recovering operation (LED1 is not lit and
LED2 is lit), be sure to quickly close the gas stop valve.
wIn case the outdoor unit is stopped when LED1 is lit and LED2 is not lit, open the liquid stop valve completely, and then
repeat step 23 minutes later.
wIf the refrigerant recovering operation has been completed normally (LED1 is not lit and LED2 is lit), the unit will remain
stopped until the power supply is turned off.
4Turn off the power supply (circuit breaker).
Warning:
When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes. The compres-
sor may burst if air etc. get into it.
10-2. Start and finish of test run
• 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 valve 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 not a problem with product because the check valve itself generates the
sound due to small pressure difference 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 12
ON
<SW4>


Stop Operation
Cooling Heating
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11 TROUBLESHOOTING
11-1. TROUBLESHOOTING
<Error code display by self-diagnosis and actions to be taken for service (summary)>
Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit.
Actions to be taken for service, which depends on whether or not the trouble is reoccurring at service, are summarized in the
table below. Check the contents below before investigating details.
Unit conditions at service Error code Actions to be taken for service (summary)
The trouble is reoccurring.
Displayed
Not displayed
Judge what is wrong and take a corrective action according
to “11-4. Self-diagnosis action table”.
Conduct troubleshooting and ascertain the cause of the
trouble according to “11-5. Troubleshooting by inferior
phenomena”.
The trouble is not reoccurring.
Logged
Not logged
Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise and etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, weather when the
trouble occurred, matters related to wiring and etc.
Reset error code logs and restart the unit after finishing
service.
There is no abnormality in electrical component,
controller board, remote controller and etc.
Re-check the abnormal symptom.
Conduct trouble shooting and ascertain the cause of the
trouble
according to “11-5. Troubleshooting by inferior
phenomena”.
Continue to operate unit for the time being if the cause
is not ascertained.
There is no abnormality concerning of parts such as
electrical component, controller board, remote controller
and etc.
11-2. CHECK POINT UNDER TEST RUN
(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.
wDo 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 requires higher ceiling settings or auto-recovery feature from power failure, make proper changes
of settings referring to the description of “Selection of Functions through Remote Controller”.
• Make sure to read operation manual before test run. (Especially items to secure safety.)
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