Mitsubishi Electric CITY MULTI PUHY-P200M-B1-BM How to use

Models PUHY-P200M-B1-BM/PUHY-P250M-B1-BM
Service Handbook
AIR CONDITIONERS CITY MULTI

CONTENTS
- 1 -
I Electrical Wiring Diagram
[1] Electrical Wiring Diagram ....................................................................................................... 2
II Refrigerant Circuit
[1] Refrigerant Circuit Figure........................................................................................................ 3
III Control
[1] Functions and Factory Settings of the Dipswitches ................................................................ 4
IV Test Run Mode
[1] Standard Operation Data (Reference Data) ........................................................................... 5
V Troubleshooting
[1] Check Code Lists.................................................................................................................... 7
[2] Preliminary error Code Lists (Outdoor unit only) .................................................................... 9
[3] Responding to Error Display on the Remote Controller........................................................ 10

- 2 -
[ I Electrical Wiring Diagram ]
I Electrical Wiring Diagram
[1] Electrical Wiring Diagram
4
ONOFF
10
1
SW4
SW1
Detection
circuit
*1
L2
ON
4
1
OFF
CNVCC4
(2P)
CNVCC5
(2P)
1
2
1
2
*For more contents displayed on LD1 with other switch settings, see LED monitor display on the outdoor board.
1
2
3
4
5
6
7
1
2
3
4
5
6
7
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
3
2
1
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
3
2
1
3
2
1
3
2
1
U
U
W
W
V
V
MC
SLEV
LEV1
Abnormal output
Compressor ON/OFF output
Demand input
Night mode input
Snow sensor input
52
C
CH1
CH2
CH3
63H
SSR
X05
X04
X02
X01
CN20
(7P)
CN32
(3P)
CN33
(6P)
CN35
(3P)
Red
Red
Red
Black
Green
Black
White White
Black
Red Red
Red
Blue
Red Red
Red Red Red
Red
CN34
(6P)
CN38
(3P)
Green Green
CN05
(4P)
CN03
(3P)
CN02
(8P)
CN01
(2P)
CNL
(3P)
TH4 TH3 TH6 TH5 TH8 TH7 TH2 TH1
63LS
CNRS3
(7P)
CNVCC3
(6P)
CNAC3
(5P)
CNLV1
(5P)
CNLV2
(5P)
CN51
(5P)
CN3D
(3P)
CN3S
(3P)
CNRS2
(7P)
CNVCC2
(6P)
CNAC2
(5P)
CN52C
(3P)
CNCT
(4P)
CNDC2
(3P)
CNDR2
(9P)
CN15V2
(14P)
CN15V1
(14P)
CNDR1
(9P)
Yellow
Yellow
CNDC1
(3P)
CNTH
(2P)
CNL2
(2P)
CN30V
(2P)
CNFAN
(3P)
ON
OFF
Factory default
Display of Relay
output 1 (Light ON)
Display of Check 1
(Blink)
Flag 1
Flag 1 Flag 2 Flag 3 Flag 4 Flag 5 Flag 6 Flag 7 Flag 8
Flag 2 Flag 3 Flag 4 Flag 5 Flag 6 Flag 7 Flag 8
Displayed contents when LD1 is lit (blink) Remarks
Operation of SW1
Contents
Compressor
in operation
Crank case
heater 21S4 SV1 SV2 Always
Light ON
Error code display
The error address and the error code are displayed alternately.
Example: Error address 51, Discharge temp. error (Error code 1102)
LD1
<Display of LD1>
LD1
SW1
SWU2
Tens digit Ones digit
SWU1
Unit address setting switch
SV
1
21
S4
SV
2
CNS1
(2P)
CNS2
(3P)
TB3 TB7
Shield
A
ABB
<Operation of SW1 (Self-diagnose switch) on Control Board and Displayed Contents on LD1>
*1 part might not exist.
MF
1
THHS L2 R2
DCCT
MF
5
4
3
2
1
CNFAN1
(5P)
Gate amp board
(G/A PKG)
IPM
Control board
(MAIN PKG) INV board
(INV PKG)
Red
Red White
White
Green
Blue
Red
Red
Blue
Blue
Blue
12V
DSA ZNR1~4
Centralized power supply
CN41
(4P)
CN40
(4P)
1
F1
6A
F2
6A
F01
2A
1
2
3
RSTE
E
T
R
E
T
R
R1
52C
POWER-BOARD
FN1 FN3
FN2
FN6
FN4
DCL
C1
+
P
N
F01
3A
LED1
LED2
LED3
SW2SW3
1
10
1
10
1
10
OFF ONOFF ONOFF ON
63HS
CNH
(3P)
TH9
CN06
(2P)
TH10
CN09
(2P)
63HS High pressure sensor
LEV1
SLEV
THHS
63LS
Choke coil (Transmission)
Electronic expansion valve (SC coil)
Electronic expansion valve (Oil return)
Low pressure sensor
Thermistor (Radiator plate)
Thermistor (Liquid outlet temp. detection at Sub-Cool coil bypass)
TH8
Thermistor (Shell temp. detection at compressor)
Thermistor (Liquid temp. detection at CS circuit)
DC Current Sensor (Direct Current)
Resistance of rush current prevention
Bleeder resistance
Main capacitor (smooth)
Electro-magnetic contactor (Inverter main circuit)
Motor for compressor
Motor Fan (Radiator plate)
Crank case heater (Compressor)
Four-way valve
Solenoid valve (Discharge-suction bypass)
High pressure switch
Thermistor (Discharge piping temp. detection)
Thermistor (Saturation evaporation temp. detection)
Thermistor (Liquid level detection of accumulator, lower)
Thermistor (Liquid level detection of accumulator, upper)
Thermistor (OA temp. detection)
Thermistor (Piping temp. detection)
Thermistor (Liquid outlet temp. detection at Sub-Cool coil)
Terminal block for power supply
Terminal block for transmission line (For indoor series)
Terminal block for transmission line (For centralized administration)
Earth terminal
Code heater (Liquid level detection of accumulator)
DCCT
R1
R2
C1
52C
MC
MF1
CH1
SV1,SV2
21S4
63H
TH1
TH2
TH3
TH4
TH5
TH6
TH7
TB1
TB3
TB7
CH2,CH3
Symbol Symbol Symbol Symbol Name Name Name Name
E
MF Motor Fan (Heat exchanger)
TH10
TH9
Note: Refer to the list shown above for switch settings.
Unit plate
Controller
box plate
E
Connecting to the
indoor unit, remote
controller
TB1
R
S
T
DS (Diode stack)
+
-
Power source
200V 3 phase
50/60Hz
5
4
3
2
1
2
12
3
123
4
1234
1
1
2
12
1212
0
3
123
123
123
4675891234 67589
1234 67589
11
11111111
1
22
22222222
33
33333
3
4467
7
5
5
8
111210 1314
12 3 4 67589111210 1314
1234
1234
ON
OFF
SW3-10
Model
P200
P250
Flag 8 stays lit while power supply
of the microcomputer is turned on.
1234 6758910
Operation
Error
Charge

- 3 -
[ II Refrigerant Circuit ]
II Refrigerant Circuit
[1] Refrigerant Circuit Figure
1. Outdoor unit
SCC
LEV1
HEX f HEX b
TH6
CS circuit
SV2
CP
CJ1
CJ2
63HS
SV1
ST6
CV1
CP3
O/S
63H
63LS
MA SA
ST8
ST4
TH4
TH3
TH7
ST7
LEV1
ST2 BV2
Indoor unit
ST1 BV1
ST3
Comp
Dryer
TH9
TH10
CP
TH2
TH8
TH5
SLEV
ST5

- 4 -
[ III Control ]
III Control
[1] Functions and Factory Settings of the Dipswitches
1. Outdoor unit
(1) Main board
Switch Function Function according to switch setting Switch setting timing
OFF ON ON OFF
SWU 1-2 Unit address setting Set to 00 or 51-100 with the dial switch
(Note 2)
SW1 1-8 For self diagnosis/
operation monitoring Refer to the LED monitor display on the outdoor unit board.
9-10 - - - * Set the switch to OFF
SW2
1Centralized control
switch
Without connec-
tion to the central-
ized controller
With connection to
the centralized
controller
Before power on
2Deletion of connec-
tion information Normal control Deletion Before power on
3Deletion of error his-
tory SW
Storage of IC/OC
error history
Deletion of IC/OC
error history
Anytime after power on (When
switched from OFF to ON)
4Refrigerant amount
adjustment Normal control Refrigerantamount adjustment mode
Anytime after power
on (When switched
from OFF to ON)
10 minutes after
compressor startup
5Heating refrigerant
pay-back time 15 sec. 30 sec. Anytime after power on
6
OA sensor failure/
Liquid level over flow
abnormality enabled
Failure enabled Failure disabled Anytime after power on
7 Forced defrost Normal control Forced defrost
starts
Anytime after power
on (When switched
from OFF to ON)
10 minutes after
compressor startup
8 Defrost timer setting 39 minutes 90 minutes Anytime after power on
(Except during defrost operation)
9- - -
Anytime after power on (Only when
switched from OFF to ON)
10 - - - -
SW3
1SW 3-2 enabled/dis-
abled SW3-2 disabled SW3-2 enabled Anytime after power on
2Test run mode: ON/
OFF Stops all ICs Sends a test-run signal to all ICs
After power on and when SW3-1 is
on.
3
Defrost start temperature -10°C [14°F] -7°C [19°F] Anytime after power on
4
Defrost end temperature 8°C [46°F] 15°C [59°F]
Anytime after power on (Except dur-
ing defrost operation)
LEV opening of IC without
heating thrmo-ON system
during defrost operation
Normal control 2000
5- - - -
6 Pump down operation Normal control Pump down opera-
tion
Anytime after power on (When
switched from OFF to ON)
7
Target condensing
temperature on the
heating mode Tcm
49°C [120°F] 53°C [127°F] Anytime after power on
8- - - -
9Unit model selection
SW 3-10 and 4-4
enabled
SW 3-10 and 4-4
for model P355 dis-
abled
Before power on
10 Model P200 Model P250 Before power on
SW4
1SW4-2 enabled/dis-
abled Disabled Enabled Anytime after power on
2Composition correc-
tion value
Value will be changed as follows when
the switch turns ON to OFF or OFF to ON
±0%→+3%→+6%→+9%→+12%→
-6%→-3%→±0%
SW4-1 is on.
3- - - -
4- - - OFF
5- - - -
6- - - -
7- - - -
8- - - OFF
9- - - -
10 - - - -
Note 1: SWU 1-2 is set to 00 and SWU 3-10 is set in every model, and other SWUs are set to OFF at factory shipment.
Note 2: When the outdoor unit address is set to 100, set the address setting switch to any one of 01-50.

- 5 -
[ IV Test Run Mode ]
IV Test Run Mode
[1] Standard Operation Data (Reference Data)
1. PUHY
(1) Cooling operation
Operation
Outdoor unit model
PUHY-P200 PUHY-P250
Operat-
ing condi-
tions
Ambient
tempera-
ture
Indoor DB/
WB
°C
27/19
Outdoor 35/24
Indoor
unit
No. of connected
units
Unit
4
No. of units in opera-
tion 4
Model - 80 71 56 22 112 80 71 22
Piping
Main pipe
m
5
Branch pipe 10
Total pipe length 45 45
Fan speed - Hi
Amount of refrigerant kg 11.7 13.7
Outdoor
unit
Electric current A 27.7 34.7
Voltage V 200
LEV
opening
Indoor unit
Pulse
270 420 360 250 360 270 420 250
SC (LEV1) 116 132
Oil return section (SLEV) 200 272
Pressure High pressure (after O/S)/low
pressure (before accumulator) MPa 2.15/0.5 (21.9/5.1) 2.15/0.46 (21.9/4.7)
Temp. of
each sec-
tion
Outdoor
unit
Discharge (TH1)
°C
87 97
Heat exchanger out-
let (TH5) 40 42
Accumu-
lator
Inlet 9 7
Outlet 11 9
Compressor inlet 9 12
Low pressure two-
phase temp. (TH2) 42
Liquid level detec-
tion, upper (TH4) 30
Liquid level detec-
tion, lower (TH3) 87
Compressor shell
bottom 75
SC heat exchanger
outlet (TH7)* 27
Bypass outlet (TH8)* 10 8
Indoor
unit
LEV inlet 26
Heat exchanger out-
let 12
Composition detection value
(αOC) 0.23

- 6 -
[ IV Test Run Mode ]
(2) Heating operation
Operation
Outdoor unit model
PUHY-P200 PUHY-P250
Operat-
ing condi-
tions
Ambient
tempera-
ture
Indoor DB/
WB
°C
20/-
Outdoor 7.0/6.0
Indoor
unit
No. of connected
units
Unit
4
No. of units in opera-
tion 4
Model - 80 71 56 22 112 80 71 22
Piping
Main pipe
m
5
Branch pipe 10
Total pipe length 45
Fan speed - Hi
Amount of refrigerant kg 11.7 13.7
Outdoor
unit
Electric current A 27.0 33.5
Voltage V 200
LEV
opening
Indoor unit
Pulse
290 470 410 250 330 290 470 250
SC (LEV1) 0
Oil return section (SLEV) 123 200
Pressure High pressure/low pressure MPa 2.10/0.36 (21.4/3.7) 2.10/0.36 (21.4/3.7)
Temp. of
each sec-
tion
Outdoor
unit
Discharge (TH11/
TH12)
°C
83 88
Heat exchanger out-
let (TH5) -3 -2
Accumu-
lator
Inlet -3 -4
Outlet -3 -4
Compressor inlet -3 -4
Low pressure two-
phase temp. (TH2) -8
Liquid level detec-
tion, upper (TH4) 35 38
Liquid level detec-
tion, lower (TH3) -3
Compressor shell
bottom 35 44
Indoor
unit
LEV inlet 30
Heat exchanger out-
let 74
Composition detection value
(αOC) 0.28

- 7 -
[ V Troubleshooting ]
V Troubleshooting
[1] Check Code Lists
Error Code Error code definition
Searched unit
Notes
0403 Serial communication error O
0900 Test run mode O
1102 Abnormal discharge air temperature O
1111 Low pressure saturation temp. sensor (TH2) O
1112 Abnormal low pressure
saturation temp.
Liquid level detection temper-
ature sensor (TH3) O
1113 Liquid level detection temp.
sensor (TH4) O
1143 Abnormal shell temp. at compressor O
1301 Abnormal low pressure O
1302 Abnormal high pressure O
1500 Excessive or insufficient refrigerant O
2500 Water leakage O
2502 Drain pump failure/Float switch trip O
2503 Drain pump failure/Float switch trip O O
2600 Water leakage O
2601 Water supply cut-off O
4102 Open phase O
4103 Reverse phase/open phase O
4115 Power supply sync signal abnormality O
4116 RPM error/Motor malfunction O O
4121 Harmonics action device error O
4200 Vdc sensor/circuit failure O
4220 Bus voltage drop protection O
4230 Heatsink overheat protection O
4240 Overload protection O
4250 IPM/Bus voltage abnormality O
4260 Cooling fan abnormality O
Temperature sensor
failure
Suction air temperature
(TH21) O
5101 Return of OA processing unit
(TH4) O
Discharge air temperature
(TH1, TH11, TH12) O
5102
Indoor piping (TH22) O
Pipes on the OA processing
unit (TH2) O
Outdoor low pressure satura-
tion (TH2) O
Outdoor unit
Indoor unit
Outdoor temp. processing unit
Remote controller

- 8 -
[ V Troubleshooting ]
5103
Temperature sensor
failure
Gas side pipe (TH23) O
Pipes on the OA processing
unit (gas side) (TH3) O
Outdoor liquid level detection
(TH3) O
5104
Pipes on the OA processing
unit (TH1) O
Liquid level detection (TH4) O
5105 Pipe (TH5) O
5106 Outside air temperature (TH6) O
5107 Liquid temp. (TH7) O
5108 SC coil bypass outlet (TH8) O
5109 Liquid temp. sensor at CS circuit failure (TH9, TH9b) O
5110 Radiator plate at INV temp. sensor failure (THHS) O
5112 Shell temp. sensor at compressor (TH10) O
5201 High pressure sensor failure (HPS) O
5301 IDC sensor/circuit failure O
6600 Address overlaps O O O O
6602 Transmission processor hardware error O O O O
6603 Transmission circuit bus-busy O O O O
6606 Communication error with the transmission processor O O O O
6607 No ACK O O O
6608 No response O O O
6810 UR communication error (UR: unit remote controller) O O O In case of using UR.
7100 Total capacity error O
7101 Capacity code error O O O
7102 Error in the number of connected units O
7105 Address setting error O
7106 Attribute setting error O
7109 Connection settings error O
7110 Unset unit connection information error O
7111 Remote controller sensor failure O O
7130 Incompatible units O
Error Code Error code definition
Searched unit
Notes
Outdoor unit
Indoor unit
Outdoor temp. processing unit
Remote controller

- 9 -
[ V Troubleshooting ]
[2] Preliminary error Code Lists (Outdoor unit only)
Preliminary error code Contents of preliminary error
1202 Abnormal discharge air temp. or discharge air temp. sensor preliminary failure (TH1)
1205 Piping temp. sensor preliminary failure (TH5)
1211 Low pressure saturation temp. or low pressure saturation temp. sensor preliminary failure (TH2)
1212 Low pressure saturation temp. or temp. sensor on liquid level detection preliminary failure (TH4)
1213 Low pressure saturation temp. or temp. sensor under liquid level detection preliminary failure (TH3)
1214 THH sensor/circuit preliminary failure
1216 Liquid outlet temp. sensor at Sub-Cool coil preliminary failure (TH7)
1217 Bypass outlet temp. sensor at Sub-Cool coil preliminary failure (TH8)
1219 Liquid temp. at composition detection or liquid temp. sensor at composition detection preliminary failure
1221 OA temp. sensor preliminary failure (TH6)
1243 Oil temp. at compressor or oil temp. sensor at compressor preliminary failure
1402 High pressure error or pressure sensor preliminary failure
1600 Overfilling refrigerant preliminary error
1605 Preliminary vacuum operation protection
1607 Preliminary CS circuit choking malfunction
4171 Harmonics action device preliminary error
4300
Idc sensor/circuit preliminary failure
Vdc sensor/circuit preliminary failure
Serial communication preliminary error
4320 Preliminary bus voltage drop abnormality
4330 Preliminary heat sink overheat malfunction
4340 Overload protection
4350 Preliminary IPM/Bus voltage abnormality
4360 Cooling fan preliminary failure