Cooper&Hunter CH09SPH115V, CH18SPH230V, CH24SPH230V, CHS30FTXWSV, CH12SPH115V Troubleshooting Guide
...
SOPHIA
SPLIT AIR CONDITIONER
WITH HEAT PUMP
TROUBLESHOOTING
1.1 Indoor Unit Error Display
Operation
lamp
Indoor room temperature sensor T1 open circuit or
short circuit
Evaporator coil temperature sensor T2 open circuit or
short circuit
O
F0
Outdoor ambient temp erature sensor T4 open circuit or
short circuit
Condenser coil temperature sensor T3 open circuit or
short circuit
Compressor discharge t emp er at ur e sensor TP open
circuit or short circuit
High temperature protection of IPM module or
compressor top
7 times
P6
Low pressure protection(Only for 36K)
Timer lamp Display LED STATUS
☆ 1 time
☆ 2 times
☆ 3 times
☆ 4 times
☆ 5 times
☆ 6 times
☆ 7 times
☆ 1 times
☆ 2 times
☆ 3 times
☆ 4 times
☆ 5 times
☆ 6 times
☆ 1 times ☆
X E0 Indoor unit EEPROM parameter er r or
X E1 Indoor / outdoor units com mu nication error
X E2 Zero-crossing signal detection error
X E3 Indoor fan speed has been out of cont rol
X E4
X E5
X EC Refrigerant leakage detection
O F1
O F2
O F3
O F4 Outdoor unit EEPROM parameter error
O F5 Outdoor fan speed has been out of contr ol
Overload current protect io n
P0 IPM malfunction or IG BT over-strong current protection
☆ 2 times ☆
☆ 3 times ☆
☆ 4 times ☆
☆ 5 times ☆
☆ 6 times ☆
☆
*P3
1) In heating mode, when the outdoor temperature is lower than -25℃ for 1 hour, the indoor unit
display error code P3.
2) If the outdoor temperature is higher than -22℃ for 10 minutes and compressor stop for 1 hour or
outdoor temperature is hi gher than -5℃ for 10 minutes, then the unit will return to work.
* Fault Symptom: The display board shows a garbled code or a code that is not an error code found
in the service manual nor a t emp er at ur e r eading.
Trouble shooting:
Use the remote controller. If the unit does not respond to t he r em ot e, the indoor PCB needs to be
replaced; if the unit does respond, then the display board needs to be replaced
☆
O（light） X（off） ☆（flash）
P1 Over voltage or over low voltage protection
P2
P3* Outdoor ambient temperature too low.
P4 Inverter compressor drive error
P5 Indoor units mode conflict (multi-zone ONLY)
1.2 Outdoor unit error display(TBD)
N
1
17122000019195
1
1
[ 1. 6 ] 20 15-09- 30
US- KFR-35W/BP3N1- (115V+RX62T+41560) .D. 13.WP2- 1
L- IN N- I N
7805
S
HEAT1
4 - WA Y
AC- FAN
HEAT2
Ear t h
DC- F AN
PMV
TESTPORT
BLACK
W
RED
V
BL UE
U
CN4_ 1
CN4_ 2
CN4_ 3CN4 _4
REA CT OR
CAP
T3T4
TP
N
N
N
H
L
CN25
CN31
AC
AC
+
-
BR1
+
E2
CN21
RC1
E304
ZR2
+
-
AC
OUT
IN
~~
RY3A
SJ-S- 112DMG
R191
I C105
CN15
ZR5
ZR4
R628
C618
R118
R123
R122
C324
I C2
R421
R621
D103
C413
C306
C319
I PM301
R176
R175
+
E109
C107
T401
R410
R409
R316
3W-10m¦ ¸¡ À1%
D407
+
+
C110
R623
R602
C624
RY3
R196
D610
C318
C316
C314
C134
+
E605
E303
E208
E206
E302
E300
CN50
R523
R522
R521
R520
R519
R518
R517
R323
R322
R321
R320
R319
R318
R317
I C301
C513
C512
C511
C323
C321
C320
R426
R314
R306
R305
R304
R303
C311
C310
C309
C308
C307
CN28
CN29
CN30
C520
C1
+
E106
C101
D101
C611
R171
D602
I C102
Rdi
D404
D401
CN6
ZR1
RY2
R626
R620
R619
R618
R617
R616
R615
R612
R611
R610
R608
R607
R605
R603
R601
R528
R516
R513
R508
R506
R504
R502
R429
R428
R427
R408
R407
R406
R405
R404
R403
R315
R301
R190
R188
R187
R186
R185
R182
R181
R180
R179
R178
R174
R173
R170
R169
R168
R165
R157
R155
R154
R152
R150
R149
R148
R147
R144
R143
R142
R140
R138
R137
R136
R135
R133
R132
R131
R130
R129
R128
R127
R126
R125
R124
R121
R120
R117
R116
R115
R114
R112
R111
R110
R108
R107
R106
R105
R102
R101
R2
Q101
OSC101
NTC2
+
LED101
I C603
I C602
I C601
I C403
I C401
I C1
+
E602
+
E401
+
E108
+
E107
+
E105
+
E103
+
E102
+
E101
+
E1
+
E3
+
DZ601
DZ304
DZ303
DZ302
DZ301
+
DZ203
+
DZ202
D406
D402
+
D2
+
D1
1
CN50 5
CN7
C615
C614
C612
C606
C605
C601
C509
C508
C507
C506
C505
C504
C503
C412
C410
C409
C408
C405
C404
C403
C402
C401
C322
C312
C305
C303
C302
C274
C273
C272
C271
C133
C132
C131
C130
C129
C128
C127
C126
C125
C124
C123
C121
C120
C119
C118
C116
C115
C114
C113
C112
C111
C106
C105
C104
C103
C102
C16
C11
C10
C7
C6
C5
C4
C3
C2
+
E280
+
E281
+
E282
+
E283
+
E404
+
E407
PTC1
+
E409
D104
R401
R103
C117
R195
R172
+
DZ204
C275
R156
R604
R104
I C101
I C104
RY4
+
E410
+
E405
FUSE1
T20A/25 0VAC
C9A
CN1A
I C404
+
D403
I C103
C613
CN3
CN2
CN1
CN16
+
DZ201
L2L3L4L5
C135
CN17
R21 R23
R158
RY5
21
4
3
3
4
ON
1 2
ON
S W2
RC2
DSA1
I C405
+
CN60
C8
L1
R1
I PM501
C122
Comment
Comment
RY1
CN50 7
R606
3W-10m¦ ¸¡ À1%
R25 3
0. 75¦ ¸/ 1W
R25 4
0. 75¦ ¸/ 1W
connect to compressor heater
when is on, 100-130V AC outpu
connect to 4-way Valve
when is on, 100-130VAC OUTPUT
connect to PFC Capacitor
when is on, 100-130V AC
output
connect to reactor
when is on, 100-130V AC output
connect to
Ground
connect to N-line
(100-130VAC INPUT)
connect to L-line
(100-130VAC INPUT)
connect to indoor unit
communication
U
V
W
10- 230VAC¡ ¯ (r unn i n g)
0VAC (st andby)
conne ct t o DC Mot or
external driver motor
connect to Electric Expansi
pipe temp.sensor& room temp.
sensor&Exaust temp. sensor
6 5 4 3
TP T4
RT
RT
+5VDC
+5VDC
+12V DC pulse wave bet ween ( +1) -G
+12V DC pulse wave bet ween ( +2) -G
+12V DC pulse wave bet ween ( +3) -G
+12V DC pulse wave bet ween ( +4) -G
+12 V DC
+12 V DC
6 5 4 3 2 1
AC fan motor
5
4
3
2
1
low speed
N line
high speed
FAN Starting Capacitor
FAN Starting Capacitor
connect to chassis heater
when is on, 100-130VAC OUTPUT
UV
W
0VAC(standby)
10- 230VAC¡ ¯( runni ng)
connect to
compressor
connect to PC
communication
EEPROM Programmer
Port
Test Port
bridge
IPM for compressor
IPM for DC FAN
P
For CH-09SPH-115VO, CH-12SPH-115VO, CH-09SPH-230VO, CH-12SPH-230VO
，
For CH-09SPH-230VO, CH-12SPH-230VO, CH-18SPH-230VO, CH-18SPH-230VO
+
T4
TP
T3
N
L
H
N
N
Rdi
Hav e
Low-Fre
YES
NO
No
U
BLUE
V
RED
W
BLACK
TESTPORT
PMV
DC- FAN
DR_L
DR_N
Ear t h
HEAT2
AC- FAN
4 - WA Y
HEAT1
S
7805
N- I N
L- IN
KFR- 35W/ BP3N1-( RX62T+41560) .D.13. WP2-1
[ 1. 8] 2015- 12- 31
1
1
17122000002718
1
E304
E208
C10
RC3
CN22
ZR4
R696
R69 5
C696
C69 5
ZR5
C9
IPM501
L1
C8
CN60
+
IC405
DAS1
RC2
ON
2
1
ON
4
3
3
4
1
2
SW2
RY5
R158
R23
R21
CN17
CN11
CN10
C135
L5
L4
L3
L2
+
DZ201
L601
CN16
CN1
CN2
CN3
CN3_ 1
C613
IC103
CN50 7
+
D403
IC404
CN1A
FUSE1
T20A/250VAC
E405
E410
RY4
IC104
IC101
R104
R604
R156
C275
DZ204
R172
R195
C117
R103
R40 1
D104
E409
PTC1
CN32
BR1
E407
E404
E283
+
E282
+
E281
+
E280
RY1
D601
Q601
C2
C3
C4
C5
C6
C7
C11
C16
C102
C103
C104
C105
C106
C111
C112
C113
C114
C115
C116
C118
C119
C120
C121
C123
C124
C125
C126
C127
C128
C129
C130
C131
C132
C133
C271
C272
C273
C274
C302
C303
C305
C312
C322
C40 1
C402
C403
C404
C405
C408
C409
C410
C503
C504
C505
C506
C507
C508
C509
C601
C605
C606
C612
C614
C615
CN7
CN9
CN31
CN50 5
D1
D2
D402
D406
DZ202
DZ203
DZ301
DZ302
DZ303
DZ304
DZ601
E1
E2
E101
E102
E103
E105
E107
E108
E401
E602
IC1
I C40 1
IC403
IC601
IC602
IC603
LED101
NTC2
OSC101
Q101
R2
R3
R101
R102
R105
R106
R107
R108
R110
R111
R112
R114
R115
R116
R117
R120
R121
R124
R125
R126
R127
R128
R129
R130
R131
R132
R133
R135
R136
R137
R138
R140
R142
R143
R144
R147
R148
R149
R150
R152
R154
R155
R157
R165
R168
R169
R170
R173
R174
R178
R179
R180
R181
R182
R185
R186
R187
R188
R189
R190
R301
R315
R403
R404
R405
R406
R407
R408
R427
R428
R429
R502
R504
R506
R508
R513
R516
R528
R601
R603
R605
R607
R608
R610
R611
R612
R615
R616
R617
R618
R619
R620
R626
RY2
ZR1
CN6
D40 1
D404
Rdi
IC102
D602
R171
C611
D101
C101
E106
C1
C52 0
ZR3
CN30
CN29
CN28
C307
C308
C309
C310
C311
R303
R304
R305
R306
R314
R426
C320
C321
C323
C511
C512
C513
IC301
R317
R318
R319
R320
R321
R322
R323
R517
R518
R519
R520
R521
R522
R523
CN50
E206
E605
C134
C314
C316
C318
CN25
D610
R196
RY3
C624
R602
R623
C110
C122
D407
R316
3W- 10m| ??¨¤1%
R409
R41 0
R606
3W- 10m1%
T401
C107
E109
R175
R176
I PM301
C319
C306
C413
D103
R621
R421
IC2
C324
R122
R123
R118
C618
R628
CN15
I C105
R191
RY3A
ZR2
RC1
CN21
R1
C41 2
E300
E302
E303
C33 0
C33 1
C33 2
C33 3
C33 4
connect t o t he t er mi nal
208-230V AC
power suppl y
connect to earth
CN60
connect to 4-way valve
when 4-way i s ON, out put 208- 230VAC
connect t o c ompr ess or heat er
power suppl y
CN17
AC fan motor
L low speed
N ground
H high speed
CN21/CN22
exhaust temp. sensor& pipe
temp.sensor& room temp.
sensor
6 5 4 3 2 1
TP T4 T3
RT
RT
+5VDC
RT
+5VDC
+5VDC
connect to Electric Expansion Valve
+12V DC pul se wave bet ween (+1) - GND
+12V DC pul se wave bet ween (+2) - GND
+12V DC pul se wave bet ween (+3) - GND
+12V DC pul se wave bet ween (+4) - GND
+1 2 V DC
+1 2 V DC
6 5 4 3 2 1
connect to indoor unit communication
HEAT2
connect to chassis heater
when is on, 208-230VAC OUTPUT
U
V
W
10- 200VAC¡ ¯ (r unni ng)
0VAC ( st andby)
connect t o t he DC compressor
Test Port
Connect to PC
communication
EEPROM Programmer Port
FUSE1 20A/250VAC
U
V
W
10-200VAC¡ ¯ ( r unni ng)
0VAC ( st andby)
connect t o DC Mot or
External driver motor
slow flicker:standby（
0.5Hz
）
quick flicker:error（
2Hz
）
continuous light: normally running
Connect to reactor
IPM for
compressor
IGBT
FRD
when heater is ON, output 208-230V AC
BR
P
N
Sucti on
Exhaust
+
17122200000309
Hui Qi
Tes tPort
1
1
HEAT
4 - WA Y
W
BL UE
BLACK
RED
V
U
TPT3T4
No
NO
NO
YES
Low-Fre
No
Have
YES
Have
Temp-Pro
Rdi
Ri pm
11
PMV
44
15V17V
[V1. 8] 2015- 01- 16
7815
22
1
34
REACT OR
311 TEST
7805
N- I N
DC- F AN
AC- FAN
L- I N
S
KFR-72W/ BP2- (311+0515+6061HD+PSS30S92F6-AG+6822+HEAT). D. 13.WP2.1
12V 5V
CN3
DSA1
K
A
K
D5
R18
R46
R107A
R515A
R316A
R18A
IC4 03
D4
C21
R54
R55
R68
R69
R56
R90
C14
J4
R16
R52
J5
+
LED1
R78
R142
R141
R155
R154
R153
R152
R151
R150
C3
R108
R107
RC2
RC4
RC1
RC3
C1
FUSE1
65T 250V30A
ZR1
ZR2
CN30
R109
R58
R61
R60
R59
C301
C76
C312
R315
C83
C85
C86
C91
R156
R158
R169
R170
R171
R172
IC34
D11
R157
R159
C310
C306
C308
C311
C307
C309
R110
E305
C302
+
DZ301
Q3
R75
R84
C103
CN28
CN29
CN6- 1
CN6
CN13
CN12
CN2
CN8
CN7
CN22
DR
CN21
DR
R102
J6
PTC1
CN41 4
R127
C105
+
E5
I PM2
C501
C503
C507
C508
C509
C510
C511
C512
C517
+
DZ501
R501
R502
R503
R504
R505
R506
R509
R510
R511
R512
R513
R514
R523
C502
C505
+
DZ502
R515
R522
+
DZ504
C504
R316
~ ~
IN
AC
+
R101
R100
R71
C42
CN20
RY5
CN16
CN18
NTC4
C8
C513
C514
C515
C516
R516
R517
R518
R519
R520
R521
C27
IC7
24LC512
33
49
17
1
IC9
R53
IC1 01
R160
+
E4
+
E3
R83
R82
R81
R80
R79
R50
C47
C20
R322
R321
R320
Q2
IC4 05
+
E10
R120
R167
R166
R32
+
E1
R12
+
LED3
R412
R413
R414
R415
Rdi
Ri pm
R13
CN24
R72
R8
R87
R74
J3
IC17
+
E24
D2
R124
C2
J2
J1
C77
AC AC
+
-
BR1
C13
D3
R7
RY3
RY4
RY2
CN5
R23
R24
R25
R26
R27
C74
C75
RY1
+
E14
C9
C17
C18
C19
C23
C24
C26
C32
C33
C35
C36
C37
C39
C43
C48
C49
C52
C65
C67
C78
C87
C89
C90
C92
C147
C153
C25
CN9
CN23
CN39
+
E17
+
E23
+
E28
IC8
24LC08
IC12
24LC08
IC14
+
LED2
OSC1
R5
R30
R31
R40
R41
R42
R48
R49
R62
R64
R65
R66
R70
R73
R76
R77
R86
R92
R97
R161
R162
R163
R164
R165
R176
R177
R419
X1
C58
+
+
E405
IC4 04
R45
Q1
C15
C22
R21
R22
R28
R29
R33
+
E22
R3
R4
R121
C5
+
E6
R10
C28
C4
CN38
IC10
C79
C80
D7
C6
R148
R63
C506
R507
R508
+
E11
R106
C73
IC21
PC817
IC31
PC817
R175
R178
C409
IC4 02
C403
IC11
+
E402
D401
C401
R403
C411
C40
C50
D403
R401
R405
R406
R404
+
E404
D402
D404
C408
C402
+
E403
R407
R408
C404
C110
+
E409
+
E401
R402
C405
10
9
7
6
5
4
3
1
T401
C406
C407
D13
D14
+
E406
+
E407
+
E408
+
E502
+
E503
+
E504
+
DZ503
CN25
R6
R9
CN60
IC4 06
IC4 07
C7
D1
R1
R137
IC2
PC851
IC1
PC817
R2
R126
R125
R123
R122
R119
R118
R117
R15
R14
C99
C98
C97
C96
C95
C94
C93
C66
D20
R17
CN17
CN10
CN1
C41
R38
C45
C44
R136
R135
R134
R104
D12
D10
C54
+
D8
D9
R57
R20
C242
C243
C244
R89
E2
R67
C84
C10
C11
IC4
C12
C38
R34
R47
R88
IC32
R39
R35
R36
R19
+
DZ6
R37
C46
C51
C53
CN19
+
DZ2
+
E27
IC3
PC817
IC5
PC817
Q8
R43
R44
R85
R91
R93
R95
R96
R99
D15
R51
+
E410
+
E8
C60
C61
E302
E303
E304
C62
VN1
VP1
U
P
VUB
U+
W
V+
V
W+
U-
VVB
VWB
FO
W-
V-
NV
NW
NU
VNC
CIN
I P M1
+
DZ304
+
DZ303
+
DZ302
C314
C316
C318
C30
C34
C31
ZR3
ZR4
C82
L1
R11
R140
CN27
E301
R168
I GBT 1
connect to the DR module
connect to earth
fuse 250V 30A
connect to reactance
290-330VDC standby
210-300VDC running
power supply 208-230V AC connect to the terminal
connect to 4-way val ve
when 4-way is on, output 208-230V AC
AC FAN mot otr
connect to co mpressor heater
when heater is on, output 208-230V AC
1 low speed
2 hign speed
3 ground
external drive mo tor
connect to DC motor
0V AC st andby
10~200V AC
’
running
U
V
W
connect to electric expansion valve
6 5 4 3 2 1
+
12VDC
+
12VDC
+12V DC pulse wave between( +4)-GND
+12V DC pulse wave between( +3)-GND
+12V DC pulse wave between( +2)-GND
+12V DC pulse wave between( +1)-GND
EEPROM Programmer Port
reserve
test port
Connect to PC
communication
V
U
W
connect to PC communication
test port
LED: status light
（
yellow
）
CN5
/CN4 connect to
chassis
heater
when heater is on, ou tput 208-230V AC
connect to DC motor
0V AC standby
10~200V AC
’
running
bridge
IGBT
fast recovery diode
(FRD)
IPM for compressor
IPM for DC FAN
P
N
For CH-24SPH-230VO,
No. Problems
LED
(Green)
IU display
1 standby for normal
O
2 Operation normally
X
3 IPM malfunction or IGBT ov
☆
P0 4 Over voltage or too low voltage prot ection
O
P1
5 EEPROM parameter error
O
E5 6 Inverter compressor drive error
X
P4 7 Inverter compressor drive error
☆
P4
8 Inverter compressor drive error
☆
P4
After power on, LED3(Gre en col or ) and LED2(Red color) will be flash if the unit has some pro blems.
O（light） X（off） ☆（2.5Hz flash）
er-strong current protect ion
3
LED2
(Red)
X
O
X
O
☆
☆
O
☆
For CH-S30FTXW-SV, CH-S36FTXW-SV,
N
L
SHOW/ SW
EARTH
[ 1. 4]2014. 06. 26
EU- KFR105W/ BP3T5N1- 350S. D. 13. WP1- 1
L - OUT
N- OUT
CONNECT TO INVERTER driver
HI GHL OW
T2B- E
T2B- D
T2B- C
T2B- BT2B- A
TP
T4
T3
S- E
S- D
S- C
S- B
S- A
FAN_OUT
FAN_I N
AB
C
D
E
202302141206
CN19
CN10
N
CN9
S
CN44
HEAT2
CN43
FAN
CN42
C
CN41
C
CN40
HEAT1
CN34
CN33
CN30
CN29
CN28
CN27
CN26
CN22
4 - WAY
CN20
CN18
CN17
CN16
CN14
CompTop
CN12
CN11
CN8
CN6
CN5
CN4
N
CN3
N
CN2
N- I N
CN1
L- I N
CN23
CN7
CN13
P- 1
CN35
N
CN37
FAN-L
CN36
FAN -H
CN21
Electric Expansion
Value B
Electric Expansion
Value E
Electric Expansion
Value D
Electric Expansion
Value C
Electric Expansion
Value A
485
communication
testPort
connect to detector
external drive DC fan
motor input terminal
external drive DC fan
motor ouput terminal
current loop
communication A
current loop
communication B
current loop
communication C
current loop
communication D
current loop
communication E
digital display
Fuse
T30A/250V
connect to high and low
pressure sensor
connect to
trmp. sensor
Fuse 5A/250V
connect to earth
CN23 reserve
digital display button
test report
connect to detector
CN43-5,CN43-1/CN41,CN42
AC fan motor capacitor
connector
CN43-4/CN37 CONNECT TO
AC FAN MOTOR(LOW SPEED)
CN43-3/CN36
AC fan motor low speed
connector
CN43-2/CN35
AV fan motor N phase
current loop
communication C
Signal wire
24VDC Pulse wave
connect to the terminal
connect to the terminal
208-230V AC
power supply
room temp sensor
pipe temp sensor
(3.3V)
(3.3V)
high pressure sensor
low pressure sensor
Connect to the Indoor evap.pipe
out temp. sensor
T2B-A、T2B-B、T2B-C、T2B-D、T2B-E
+12V DC pulse wave between (+1)-GND
+12V DC pulse wave between (+2)-GND
+12V DC pulse wave between (+3)-GND
+12V DC pulse wave between (+4)-GND
+12V DC
+12V DC
6 5 4 3 2 1
when 4-way is ON, output 208-230VAC
connect to the 4-WAY
when heater is ON, output 208-230V AC
connect to compressor heater
CN44 L
CN10 N
CN40 L
CN4 N
CN22 L
CN3 N
connect to exhaust
temp. sensor
connect to the terminal
208-230V AC
external drive DC fan
motor connector
T3
T4
electric
heater1
electric
heater 2
202302141237
PFC- L2
[ 1. 6] 20 14. 10. 16
EU-KFR105W/ BP2T3N1- 350( 767). D. 13. MP2-1
PFC- L1
EARTH
+
CN55
T O- MA I N
W
V
U
I P M2
I P M1
I C1 424C08
CN54
L - I N2
N- I N2
OU TF A N( DC)
I C1
CN53
power s uppl y
connect t o t he t er mi nal
208- 230V AC
CN54
CN51CN52
PFC
inductance
terminal
CN58
EATTH
+
210- 300VDC ( Runni ng)
CAPACI TOR Vol t a ge
290- 330VDC ( st andby)
CN55
T O MA I N
CN19
connect to DC fan motor
U
V
W
10- 200VAC ( r unni ng)
0VAC ( s t andby)
connect t o t he compr essor
U
V
W
10- 200VAC ( r unni ng)
0VAC ( s t andby)
IPM board,
Error Code
E0/F4
Malfunction decision
Indoor or outdoor PCB main chip does not receive feedback
Supposed causes
Installation mistake
Yes
Replace the indoor/outdoor
main PCB.
Power off,
then restart the
unit 2 minutes later.
your side.
1.3 Diagnosis and Solution
1.3.1 EEPROM parameter error diagnosis and solution(E0/F4)
conditions
from EEPROM chip.
●
● PCB faulty
Trouble shooting:
EEPROM: a read-only memory whose contents can be er ased and reprogrammed using a pulsed
voltage. For the location of EEPROM chip, please refer to the below photo s.
Indoor PCB
Note: The two photos above are only for reference, it’s may be not same totally with the one s on
Outdoor PCB
1.3.2 Indoor / outd oor unit’s communi cation diagnosis and s olution(E1)
Error Code
E1
Malfunction decision
Indoor unit does not receive the feedback from outdoor unit
continuously.
Supposed causes
Wiring mistake
Measure Vs
.
Is
the voltage moving
alternately between
-25
V to 25
V
?
Measure Vs
.
Is the voltage moving
alternately between
-25
V to 25
V
?
Yes
Power off,
then restart the unit 2
minutes
later.
Is the error extinguished?
Power off
, then restart the unit
2
minutes
later.
Is the error extinguished?
No
Replace
the outdoor main PCB.
Power on.
Is the error
extinguished?
Replace
the outdoor main PCB.
Power on.
Is the error
extinguished?
Check the outdoor wiring connection
。
Is the wiring
correctly?
Check the outdoor wiring connection。
Is the wiring correctly
?
Replace the indoor main PCB
.
Power on. Is the error
extinguished?
Replace the indoor main PCB
.
Power on
. Is the error
extinguished?
Yes
Replace the outdoor main PCB.
Replace the outdoor main PCB.
No
Replace the indoor main PCB.
Replace the indoor main PCB.
No
Check the indoor wiring connection
。
Is the wiring
correctly?
Check the indoor wiring connection
。
Is the wiring correctly?
Yes
No
Check whether reactor
is normal
?
Check w
hether rea
ctor
is normal?
Yes
Replace
the reactor
Replace
the reactor
No
conditions
Trouble shooting:
during 110 seconds and this condition happens four times
●
● Indoor or outdoor PCB faulty
Remark:
Use a multimeter to test t he D C voltage
between 2 port and 3 port of out door
unit. The red pin of mu ltimeter connects
with 2 port while the black pin is for 3
port.
When AC is normal running, the voltage
will move alternately betw een -25V to
25V.
If the outdoor unit has malfunc t io n, the
voltage will move alternately with
positive value.
While if the indoor unit has ma lfunction,
the voltage will be a certain value.
Remark:
Use a multimeter to test the resistance
of the reactor which does not connect
with capacitor.
The normal value should be around
zero ohm. Otherwise, the r eact or m ust
have malfunction.
1.3.3 Zero crossi ng detection error diagnos i s and solution (E2)
Error Code
E2
Malfunction decision
When PCB does not receive zero crossing signal feedback for 4
Supposed causes
Connection mistake
Check if the connections and
power supply is normal
?
Correct the connections. Turn on the
unit when the power supply is good.
No
Yes
Indoor main PCB is
defective. Replace indoor
main PCB.
conditions
minutes or the zero crossing signal ti me interval is abnormal.
●
● PCB faulty
Trouble shooting:
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