Mitsubishi Electric PU-P200YKA3 User manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SERVICE MANUAL R410A
Outdoor unit
[Model Name]
PUHZ-P200YKA3
PUHZ-P250YKA3
[Service Ref.]
PUHZ-P200YKA3.UK
PUHZ-P250YKA3.UK
PARTS CATALOG (OCB679)
CONTENTS
1. REFERENCE MANUAL····························2
2. SAFETY PRECAUTION····························2
3. FEATURES ············································6
4. SPECIFICATIONS ···································7
5. DATA ····················································8
6. OUTLINES AND DIMENSIONS················ 11
7. WIRING DIAGRAM································ 12
8. WIRING SPECIFICATIONS····················· 13
9. REFRIGERANT SYSTEM DIAGRAM ··········· 18
10. TROUBLESHOOTING···························· 20
11. FUNCTION SETTING ····························· 74
12. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ···83
13. EASY MAINTENANCE FUNCTION··········· 92
14. DISASSEMBLY PROCEDURE················· 95
Note:
• This manual describes service
data of the outdoor units only.
No. OCH679
REVISED EDITION-A
July 2020
OCH679 is void.
Revision:
•Connectable indoor units
have been added in
REVISED EDITION-A.

2
OCH679A
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
INDOOR UNIT SERVICE MANUAL
Model Name Service Ref. Service
Manual No.
PLA-RP50/60/71/100/125EA PLA-RP50/60/71/100/125EA.UK OCH626
OCB626
PCA-RP71HAQ PCA-RP71HAQ(-ER) OCH492
OCB492
PCA-M50/60/71/100/125KA PCA-M50/60/71/100/125KA OCH659
OCB659
PKA-M50HA(L) PKA-M50HA(L) OCH660
OCB660
PKA-M60/71/100KA(L) PKA-M60/71/100KA(L).TH OCH661
OCB661
PSA-RP71/100/125KA PSA-RP71/100/125KA OCH528
OCB528
PEAD-M50/60/71/100/125JA(L) PEAD-M50/60/71/100/125JA(L).UK HWE16130
BWE017010
PEAD-M50/60/71/100/125JA(L).TH
PEA-RP200/250WKA PEA-RP200/250WKA HWE17030
BWE10140
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 breaker.
• 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.
1REFERENCE MANUAL

3
OCH679A
[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
(1) Check that cylinder for R410A on the market is a syphon type.
(2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Electronic weighing scale
Unit
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.
Contamination inside refrigerant piping can cause deterio-
ration of refrigerant oil, etc.
Store the piping indoors, and keep both ends of
the piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of com-
pressor.
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
If large amount of mineral oil enters, that can cause deterio-
ration 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.
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.
Use new refrigerant pipes.
In 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.
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.
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.
Use the following tools specifically designed for
use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
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.

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 drier.
• If the diameter of the existing pipes is di󰀨erent from the specied diameter, refer to technological 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.
• In case existing pipes were used for gas or oil
heat pump systems, be sure to clean the pipes for
P200/250 models.
The existing pipe thickness does not meet
specications or the pipes are damaged.
4
OCH679A
2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES
(1) Flowchart
[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 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 —

5
OCH679A
(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.)
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.
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
—
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions (in)
Flare cutting dimensions
Outside
diameter
Dimension A ( )
+0
-0.4 (mm)
(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 (in)
Flare nut dimensions
Outside
diameter
Dimension B (mm)
(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

6
OCH679A
3 FEATURES
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT
Maximum 30 m (PUHZ-P200/250)
The refrigerant circuit with LEV (Linear Expansion Valve) and accumulator always control the optimal refrigerant level
regardless of the length (30 m maximum and 5 m minimum) of piping. The additional refrigerant charging work during instal-
lation 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-P200YKA3
PUHZ-P250YKA3

58
60
A
kW
W
kW
K
/min(CFM )
dB
dB
mm (inch)
mm (inch)
mm (inch)
kg (lb)
kg (lb)
L
mm (inch)
mm (inch)
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) oNo.
Fan motor output
Airflow
Defrost method
Sound pressure level
Dimensions
Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.
Connection method
Between the indoor &
outdoor unit
Cooling
Heating
W
D
H
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
Service Ref. PUHZ-P250YKA3.UK
PUHZ-P200YKA3.UK
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
Inverter
—
Plate fin coil
Propeller fan o2
0.200 + 0.200
140 (4,940)
Reverse cycle
1,050 (41-5/16)
330 + 40 (13+1-9/16)
1,338 (52-11/16)
R410A
Flared
Flared & Brazing
Maximum 30 m
Maximum 70 m
HP switch
Comp surface thermo
Over current detection
3 phase 50 Hz, 400 V
OUTDOOR UNIT
REFRIGERANT PIPING
19
127 (280)
6.5
9.52 (3/8)
25.4 (1)
135 (298)
7.7
12.7 (1/2)
25.4 (1)
ANB52FRNMT
2.30 (FVC68D)
59
62
3.7
21
7
OCH679A
4 SPECIFICATIONS

8
OCH679A
5DATA
5-1. REFILLING REFRIGERANT CHARGE (R410A: kg) PUHZ-P200/250
ANB52FRNMT
Service Ref.
Compressor model
(at 20°C)
U-V
U-W
W-V
Winding
Resistance
( ")
0.31
0.31
0.31
PUHZ-P200YKA3.UK
PUHZ-P250YKA3.UK
Additional charge is required for pipes longer
than 30 m.
Service Ref. Piping length (one way) Initial
charged
10 m 20 m 30 m 40 m 50 m 60 m 70 m
PUHZ-P200YKA3.UK 5.9 6.2 6.5 + 0.9 (7.4) + 1.8 (8.3) + 2.7 (9.2) + 3.6 (10.1) 6.5
PUHZ-P250YKA3.UK 6.9 7.3 7.7 + 1.2 (8.9) + 2.4 (10.1) + 3.6 (11.3) + 4.8 (12.5) 7.7
5-3. COMPRESSOR TECHNICAL DATA
5-2. ADJUSTING THE AMOUNT OF REFRIGERANT PUHZ-P200/250
Amount of additional refrigerant charge (kg)
30 m and less 31–40 m and less 41–50 m and less 51–60 m and less 61–70 m and less
0.9 kg 1.8 kg 2.7 kg 3.6 kg
1.2 kg 2.4 kg 3.6 kg 4.8 kg
Service Ref. Permitted
pipe length
PUHZ-P200YKA3.UK
PUHZ-P250YKA3.UK
70 m or less
Initial charge
(kg)
6.5
7.7
No additional
charge necessary

9
OCH679A
5-4. NOISE CRITERION CURVES
1.5 m
1 m
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
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-P200YKA3.UK
COOLING
MODE
HEATING
58
SPL(dB)
60
LINE
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-P250YKA3.UK
COOLING
MODE
HEATING
59
SPL(dB)
62
LINE

10
OCH679A
5-5. STANDARD OPERATION DATA
PLA-RP125EA.UK ×2PLA-RP100EA.UK ×2
PLA-RP125EA.UK
PLA-RP100EA.UK
1, 50
1, 50
230
230
0.10 × 2
0.07 × 2
0.66 × 2
0.46 × 2
PUHZ-P250YKA3.UK
PUHZ-P200YKA3.UK
3, 503, 50
400
400
HeatingCooling
HeatingCooling
10.9710.47
9.289.18
19,000 22,400 22,000 27,000
5.89 5.99 6.92 7.26
68.974.064.866.6
44.050.244.049.7
−4.16.7
−2.96.9
7.57.5
7.57.5
2027
2027
1519
1519
42.211.6
39.510.7
735
735
624
624
0.67
0.79
0.140.11
—
—
—
—
2.56
2.98
2.95 2.58
0.60
0.88
0.86 0.63
0.07 × 2
0.44 × 2
0.10 × 2
0.64 × 2
Electrical circuitRefrigerant circuitIndoor side
Outdoor
side
Representative matching
SHF
BF
Mode
Capacity
Input
Total
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

11
OCH679A
Unit: mm
6OUTLINES AND DIMENSIONS
PUHZ-P200YKA3.UK
PUHZ-P250YKA3.UK

12
OCH679A
7WIRING DIAGRAM
PUHZ-P200YKA3.UK PUHZ-P250YKA3.UK
Terminal Block <Power Supply>
Terminal Block <Indoor/Outdoor>
Motor for Compressor
Fan Motor
Solenoid Valve (Four-Way Valve)
High Pressure Switch
Thermistor <Liquid>
Thermistor <2-Phase Pipe>
Thermistor <Ambient>
Thermistor <Heat Sink>
Thermistor <Comp. Surface>
Linear Expansion Valve
Reactor
Reactor
Rush Current Protect Resistor
Fuse <T15AL250V>
Capacitor
P.B.
N.F.
C.B.
TB-U/V/W
TB-L1/L2/L3
TB-P1/P3
X52CA/B
LI1/LI2/LI3/NI
LO1/LO2/LO3
GD1, GD2
SW1
SW4
SW5
SW6
SW7
SW8
Power Circuit Board
Connection Terminal <U/V/W-Phase>
Connection Terminal <L1/L2/L3-Power Supply>
Connection Terminal
52C Relay
Noise Filter Circuit Board
Connection Terminal <L1/L2/L3/N-Power Supply>
Connection Terminal <L1/L2/L3-Power Supply>
Connection Terminal <Ground>
Controller Circuit Board
Switch <Manual Defrost, Defect History,
Record Reset, Refrigerant Address>
Switch <Test Operation>
Switch <Function Switch, Model Select>
Switch <Model Select>
Switch <Function Switch>
Switch <Function Switch>
SW9
SWP
CN31
CN3S
CNDM
CN51
SV1/CH
SV3/SS
CNM
CNMNT
CNVMNT
LED1, LED2
F3, F4
X51, X52, X54
Switch <Function Switch>
Switch <Pump Down>
Connector <Emergency Operation>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
Connector
<Connect to Optional M-NET Adapter Board>
Connector
<Connect to Optional M-NET Adapter Board>
LED <Operation Inspection Indicators>
Fuse <T6.3AL250V>
Relay
SYMBOL
TB1
TB2
MC
MF1, MF2
21S4
63H
TH3
TH6
TH7
TH8
TH32
LEV-A
ACL4
DCL
RS
FUSE1, FUSE2
CY1, CY2
SYMBOL SYMBOLNAME NAME NAME
Never splice the power
cable or the indoor-outdoor
connection cable,
otherwise it may result in
a smoke, a fire or
communication failure.
X54
31
MS
3~
MF1
CNF1
(WH)
17
MS
3~
MF2
CNF2
(WH)
17
P.B.
U
POWER
SUPPLY
3N ~
400V 50Hz
TB1
VW
RD
WH
BK
MC
7
L1
L2
L3
N
N.F.
CNDC
(PK) 31 CNL
(BU)
13
CNAC2
(RD)
31
CNCT
(RD) 1 2
LO3
GD1
NI
LI1
LI2
LI3
GD2
S1
S2
S3
2
2ACL4
RD
WH
BK
BU
RD
WH
BK
TB2
X52CA
BK
YE
OG
BN
TB-P1 TB-P3
RD
GNYE
BK
BK
WH WH
TO
INDOOR
UNIT
1 2
CN6
(WH) 1 2
CN5
(RD) CN2 (RD)
1 7 1 2
CN4
(WH)
TB-U
TB-V
TB-W
L3IN
TB-L2
TB-L1
TH8
t°
RS
RD
MS
3~
22
CY1 CY2
C. B. TH6TH7 TH3
21S4
t° t° t°
CNS
(WH)
CNAC
(WH)
CNDC
(PK)
F3
F4 21S4
(GN)
CN2
(RD)
CN4
(WH)
SW5
TH7/6
(RD) TH3 (WH)
TRANS
CNVMNT
(WH) CNMNT (WH)
SW8
SW6SW1
SW7SW9
CN31
X52
2
7
*1
1 4 1 2 31 1 5
1 2
17
1
3
1
3
1 2
3431 SV1/CH
(GY) SV3/SS (WH)
X51
31
2CN3S
(WH) 3
1
CNDM
(WH)
CN51
(WH)
3
1
5
1
1 2
TH32
(BK)
TH32
t°
When M-NET adapter is connected
CN2M
(WH)
CN5
(WH)
CND
(WH)
M-NET
M-NET ADAPTER
TB7
A B S
51
5
1
2
13
3
3 5
CNM
(WH)
1 14
LED1 LED2
SWP
SW4
*1
TB-L3
X52CB
L3OUT
FUSE1
FUSE2
WH
RD
WH
RD
DCL
CNAC1
(WH) 31 LO1
LO2
LEV-A
63H
(YE)
1 3
LEV-A
(WH) 51
63H
M
1 2 3 4 5 6 7 8
OFF
ON
1 2 3 4 5 6
OFF
ON
1 2 3 4 5 6 7 8
OFF
ON
1 2 3 4 5 6
OFF
ON
SW6 MODEL SW5-6 *2
200Y
250Y
The black square (■) indicates a switch position.
*1. MODEL SELECT
*2. SW5-1 to 5: Function switch

Outdoor unit model P200/250Y
Outdoor unit power supply 3N~ (3 ph 4-wires), 50 Hz, 400 V
Outdoor unit input capacity main switch (Breaker) *1 32A
Wiring
Wire No. ×
size (mm²)
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 *2 1 × Min 2.5
Remote controller-Indoor unit *3 2 × 0.3 (Non-polar)
Circuit
rating
Outdoor unit L1-N, L2-N, L3-N (3 phase) *4 230 V AC
Indoor unit-Outdoor unit S1-S2 *4 230 V AC
Indoor unit-Outdoor unit S2-S3 *4 24 V DC
Remote controller-Indoor 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 80 m. Total maximum including all indoor/indoor connection is 80 m.
• Use one cable for S1 and S2 and another for S3 as shown in the picture.
• Maximum 50 m. Total maximum for PEA. Wiring size 3 × 1.5 (Polar).
*3.The 10 m wire is attached in the remote controller accessory.
*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.
13
OCH679A
8WIRING SPECIFICATIONS
8-1. FIELD ELECTRICAL WIRING (power wiring specifications)
BEarth leakage breaker
Cwiring circuit breaker or
isolating switch
1
21 2
S1
Indoor
unit
S2
S3
S1
S2
S3
S1
S2
S3
Indoor/outdoor
unit connection
cable
Indoor
unit
Remote
controller
Outdoor
unit
L1
L2
L3
N
Unit
power
supply B C
BEarth leakage breaker
Cwiring 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
Outdoor
unit
L1
L2
L3
N
Unit
power
supply B C
Synchronized twin and triple system Electrical wiring
• Synchronized twin • Synchronized triple
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 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
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a re or communication failure.
S1
S2
S3
Indoor/outdoor
unit connection
cable
Indoor
unit
Unit
power
supply
Outdoor
unit
L1
L2
L3
N
S1
S2
S3
L1
L2
L3
N
B
C
1
2Remote
controller
BEarth leakage breaker
Cwiring circuit breaker or
isolating switch
Unit
power
supply B C
1:1 System (Indoor: PEA-200, 250)

14
OCH679A
8-2. SEPARATE INDOOR UNIT/OUTDOOR UNIT POWER SUPPLIES
The following illustrations show available connection patterns.
The outdoor unit power supply patterns vary on models.
Simultaneous twin/triple 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 cables
Remote controller
Indoor unit
Option
Indoor unit power supply
KIndoor 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
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
S1
S2
S3
L
N
BLUE BLUE
YELLOW YELLOW
CND
CN01
ORANGE
CN01
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
E
F
D
G
K K
H
G
H
G
H
L
NN
S1
S2
S3
S1
S2
S3
1
2
L
N
S1
S2
S3
1
2
L
N
S1
S2
S3
1
2
AB C
B CJ
L
1
L
2
L
3
*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.The 10 m wire is attached in the remote controller accessory. Maximum 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 line longer than power 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
M/RP50-140
~/N (single), 50 Hz, 230 V
16 A
3oMin 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
OCH679A
8-3. 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 oMin. 0.3
—
Indoor unit-Outdoor unit earth
Wire No. oSize (E)
Note: 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)*5
Round 2.5 3 Clockwise : S1-S2-S3
(Pay attention to stripe of yellow and green.) (30)
*1
Flat 2.5 3 Not applicable
(Because center wire has no cover finish) Not applicable
*4
Flat 1.5 4 From left to right : S1-Open-S2-S3 (18)
*2
Round 2.5 4 Clockwise : S1-S2-S3-Open
(Connect S1 and S3 to the opposite angle.) (30)
*3
Note: Power supply cords of appliances shall not be lighter than design 60245 IEC or
227 IEC.
*1 In case that cable with stripe of yellow and green is available.
*2 In case of regular polarity connection (S1-S2-S3), wire size is 1.5 mm².
*3 In case of regular polarity connection (S1-S2-S3).
*4 In case that flat cables are connected as this picture, they can be used up to 30 m.
*5 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)

16
OCH679A
8-4. 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 is acceptable 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 centralized 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.
Centralized
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
Centralized
controller
M-NET transmission wire
O Bad example (Multi spot earthing of shield wire)
Good example 1 (Single spot earthing of shield wire)
Power
supply unit
M-NET type
outdoor unit
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
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)
Centralized
controller
Centralized
controller
Power
supply unit
Power
supply unit

17
OCH679A
8-4-3. Regulations in address settings
In the case of multiple grouping system, M-NET and refrigerant address settings should be done as explained in the above
section. Set the lowest number in the group for the outdoor unit whose refrigerant address is “00” as its M-NET address.
Refrigerant addresses can be overlapped if they are in the different group.
Note: In 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”.
8-4-1. 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 1s digit and SW12 for 10s digit), which
is located on the M-NET board of outdoor unit.
(Initial setting: all addresses are set to “0”.)
8-4-2. Refrigerant address setting
In the case of multiple grouping system (multiple refrigerant circuits in 1 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
1 2
–
50
M-NETAddress No. <Setting example>
Switch
setting
SW11
1s
digit
SW12
10s
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
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
Centralized
controller
Power
supply unit
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
Centralized
controller
M-NET wiring
(1) Use 2-core × 1.25 mm² 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 A terminal and the other to B. 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 (A, B,
S) on M-NET terminal block should be individually wired to the other outdoor unit’s
terminal, i.e. A to A, B to B 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
A B S

18
OCH679A
Unit: mm
9REFRIGERANT SYSTEM DIAGRAM
PUHZ-P200YKA3.UK PUHZ-P250YKA3.UK
Heat exchanger
Thermistor TH6
(2-phase pipe) Thermistor TH7
(Ambient)
Distributor
Accumulator
Compressor
Refrigerant GAS pipe
connection [25.4([1 inch)
Refrigerant LIQUID pipe
P200 : connection [9.52([3/8 inch)
P250 : connection [12.7([1/2 inch)
Stop valve
(with service port)
4-way valve
Linear expansion valve A
Thermistor TH32
(Comp. surface)
Muffler
Ball valve
#50
Strainer
Oil return hole
with strainer #40
Strainer
#100
Strainer
#100 Strainer #100
Refrigerant flow in cooling
Refrigerant flow in heating
Charge plug
(High pressure)
<Blazing>
Thermistor TH3
(Liquid)
Thermistor (TH8)
High pressure
switch 63H
Charge plug
(Low pressure)

19
OCH679A
9-2. 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. However,
this is not a 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. However, this is not a problem with product because it is generated by the check
valve itself due to a 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 1 2
ON
<SW4>
A B
C D
A
Stop C
Operation
BCooling
D
Heating
9-1. REFRIGERANT COLLECTING (PUMP DOWN)
When relocating or disposing of the indoor/outdoor unit, pump down the system following the procedure below so that no refrig-
erant is released into the atmosphere.
1 Turn o󰀨 the power supply (circuit breaker).
2Connect the low pressure valve on the gauge manifold to the charge plug (low pressure side) on the outdoor unit.
3Close the liquid stop valve completely.
4Supply power (circuit breaker).
• When power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CEN-
TRALLY CONTROLLED” is displayed, the refrigerant collecting (pump down) cannot be completed normally.
• Startup of the indoor-outdoor communication takes about 3 minutes after the power (circuit breaker) is turned on. Start the
pump-down operation 3 to 4 minutes after the power (circuit breaker) is turned on.
5Perform the refrigerant collecting operation (cooling test run).
• Push the pump-down SWP switch (push-button type) on the control board of the outdoor unit. The compressor and venti-
lators (indoor and outdoor units) start operating (refrigerant collecting operation begins). (LED1 and LED2 on the control
board of the outdoor unit are lit.)
• Only push the pump-down SWP switch if the unit is stopped. However, even if the unit is stopped and the pump-down SWP
switch is pushed less than 3 minutes after the compressor stops, the refrigerant collecting operation cannot be performed.
Wait until the compressor has been stopped for 3 minutes and then push the pump-down SWP switch again.
6Fully close the ball valve on the gas pipe side of the outdoor unit when the pressure gauge on the gauge manifold shows
0.05 to 0 MPa [Gauge] (approx. 0.5 to 0 kgf/cm²) and quickly stop the air conditioner.
• Because the unit automatically stops in about 3 minutes when the refrigerant collecting operation is completed (LED1 o󰀨,
LED2 lit), be sure to quickly close the gas ball valve. However, if LED1 is lit, LED2 is o󰀨, and the unit is stopped, open the
liquid stop valve completely, close the valve completely after 3 minutes or more have passed, and then repeat step 5.
(Open the gas ball valve completely.)
• If the refrigerant collecting operation has been completed normally (LED1 o󰀨, LED2 lit), the unit will remain stopped until
the power supply is turned o󰀨.
• Note that when the extension piping is very long with a large refrigerant amount, it may not be possible to perform a pump
down operation. In this case, use refrigerant recovery equipment to collect all of the refrigerant in the system.
7 Turn o󰀨 the power supply (circuit breaker), remove the gauge manifold, and then disconnect the refrigerant pipes.
Warning:
When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.
• If the refrigerant pipes are disconnected while the compressor is operating and the stop valve (ball valve) is open, the
pressure in the refrigeration cycle could become extremely high if air is drawn in, causing the pipes to burst, per-
sonal injury, etc.

20
OCH679A
10 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 wired remote controller and control board of out-
door unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summa-
rized in the table below. Check the contents below before investigating details.
10-1. TROUBLESHOOTING
Unit conditions at service Check 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 “10-4. SELF-DIAGNOSIS ACTION TABLE”.
Conduct trouble shooting and ascertain the cause of the
trouble according to “10-5. TROUBLESHOOTING OF
PROBLEMS”.
The trouble is not reoccurring.
Logged
Not 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.
1Re-check the abnormal symptom.
2Conduct trouble shooting 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.
10-2. CHECK POINT 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 500 V Megger
and check that it is 1.0 M"or over.
• Do not use 500 V 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.)