Troubleshooting
Samsung Electronics
4-37
■
Reverse phase, phase fail detection (Outdoor unit using 3-phase power) –
display with
any problems
1. When power is on, it checks the power status used for 3-phase power compressor.
When the order of 3-phase L1(R) – L2(S) – L3(T) is changed (reversed) or there is a phase that does not receive power (phase
fail), it will display E425 and the air conditioner will stop operating.
1) Check if the power is L1(R) – L2(S) phase/ L1(R) – L3(T) phase/ L2(S)
– L3(T) phase.
2) When there is any terminal that does not have normal voltage,
check the external power of the air conditioner and take appropri-
ate measures.
3) If 3-phase power is normal check the phase of the power line using
3-phase
tester.
If it shows reverse phase, please change the current power line
connection.
4) After completing above, press reset key (K3) then check the power again.
5) If the same problem occurs during the second check-up, check the color of the 3-phase power check lines. If there is no prob-
lem, please replace PCB.
3-phase tester
●
When there is a wrong line connection on N phase (when one of R, S and T is changed with N phase), DVM PLUS3
carries out power protection to display E425 and cut off the power within 1 minute.
If that happens, it is not a PCB power defect and check the phase of power lines before replacing PCB.
250V/T2A
250V/T1A
A
B
C
A
B
C
D
D
OUTDOOR
070512-00416-04
DB41-00613A
EVI-I
EVI-O
OIL-BAL
TUBE COND/O
SUCTION
DISCH1
DISCH2
DISCH3
EVI-EEV
MAIN-EEV2
HR-EEV
MAIN-EEV1
BLDC
12V
3PHASE
SUMP
AIR
H-SENSOR
L-SENSOR
LIQUID
EVI
OD EEV
COOLING
4-WAY
PWM
HOTGAS
N
C-3
C-2
C-1
OIL3
OIL2
OIL1
A-CCH
CCH-3
CCH-2
CCH-1
POWER
CT-SENSOR
TRANS-OUT
COMM.5V
IN-COMM
OUT-COMM
TEN
ONE
ONE
INDOOR
MCU
K5 K6 K7 K8
K9 K10 K11 K12
K13 K14 K15 K16
K17 K18 K19 K20
K21 K22
K23
K24
DOWNLOAD
DOWNLOAD
DOWNLOAD
220V~240V
380V~415V
08.01.04
12V
VC
C
GND
814
123
123
123
K26
K25
K28
K27
K30
K29
7812
7805
SW01
SW02
ON
SW03
ON
SW04
ON
SW05
ON
SW06
SW09
RY71
RY72
RY73
RY74
RY75
RY76
RY77
RY78
DIS1
RY79
DIS2
RY80
RY81
RY82
RY83
RY84
RY85
RY86
F901
SS71
PC501
PC502
PC503
PC504
7
CN10
2
CN12
CN13
K1
K2
K3
K4
R501
R502
R503
4
CN100
R504
R505
R506
CN31
CN32
CN32
4
CN41
4
CN42
8
CN44
6
CN47
4
CN48
4
CN49
4
CN51
R337
R01
5
CN901
R02
R03
6
CN62
6
CN63
5
CN64
5
CN65
3
CN70
VA74
3
CN71
7
CN72
3
CN73
3
CN74
X501
3
CN75
X502
7
CN76
7
CN77
2
CN80
C905
2
CN81
2
CN82
C907
5
CN83
2
CN84
F902_1
3
CN85
3
CN86
10
CN91
13
CN99
C923
10
CN92_SUB
3
OPT1
IC901
IC902
IC903
R001
R002
R003
R004
R005
R006
R007
R008
R009
R010
IC18
C20
D940
R401
D941
R402
C22
D942
R403
D943
R404
D944
R405
R406
R212
R407
R408
IC20
R409
IC23
R601
R602
R603
R604
R410
R605
R606
R607
R221
R417
R418
BLU
WHT
YEL
BLU
R421
YEL
R422
R423
R424
R425
R426
BLK
RED
RED
YEL
RED
YEL
BLU
WHT
BLK
RED
R433
R434
C54
R435
C55
R436
C56
R437
R438
YEL
R439
BLU
BLK
BLU
WHT
C401
WHT
C402
WHT
C403
WHT
C404
BLU
C405
RED
C212
C409
WHT
C601
WHT
C602
C603
R833
YEL
C604
BLK
C605
C411
BLU
C606
C412
YEL
C607
C413
BLK
R450
0 1
2
3
4
5
6
7
8
9
C221
C222
C417
C418
C419
RED
LED05
RED
LED06
WHT
WHT
LED07
LED08
C420
C812
C813
C814
C815
C816
C817
C818
BLK
0 1
2
3
4
5
6
7
8
9
C819
0 1 2
3
4
56
78
9A
B
C
D
E F
C820
C821
C825
LED101
PC02
LED102
PC03
LED103
PC04
LED104
LED105
LED106
LED107
LED108
D401
LED109
D402
Q501
LED110
LED111
LED112
LED113
LED114
LED115
LED116
CD31
CD32
CD33
Q341
Q342
Q343
R101
R102
R103
R104
R105
R106
R107
R108
R109
R303
R304
R110
R305
R111
R112
R306
R113
R307
R114
R308
R309
R115
R116
R310
R311
R507
R508
R509
R701
R702
R510
R511
R512
R513
R514
R515
R516
R517
R323
R518
R324
R901
R519
R325
R902
R326
R903
R904
R520
R521
R522
R523
R333
R334
R335
R336
C301
D51
C302
D52
C303
D53
C304
D54
C305
R341
D55
C306
R342
D56
C307
R343
C308
R344
BD901
C309
R345
BD902
R346
R347
C501
C502
C503
C504
C310
C505
C311
C506
R12
C701
R355
R356
C321
C322
C323
R20
C324
C901
R21
C325
C902
R22
C326
C903
C904
CD321
C906
CD322
CD323
C908
C524
C910
C334
R370
R371
R372
R373
C340
C343
C344
C345
C922
C924
C349
C350
C351
C352
C353
C354
R51
R52
R53
D501
D502
D503
Q601
Q602
Q603
Q604
D901
D902
D903
D904
D905
D906
D907
D908
D909
D910
D911
D912
D913
D914
IC701
D915
D916
RED
D917
RED
D918
GRN
D919
GRN
D920
GRN
D921
GRN
D922
GRN
D923
GRN
D924
GRN
D925
GRN
D926
GRN
D927
GRN
D928
GRN
D929
IC02
26
51
76
100
IC04
IC05
IC06
IC07
GRN
IC08
D930
GRN
IC09
D931
GRN
D932
GRN
D933
GRN
D934
GRN
D935
D936
D937
IC10
D938
D939
24
25
40
41
64
65
80
IC14
Reset Key
Display Part
Setup switch
for the number
of Indoor units
MCU setup
switch
Summary of Contents for AVXC4H052/072/100/110/145CE
Page 114: ...0 02 Samsung Electronics 4 30 ...
Page 232: ...0 02 Samsung Electronics 5 20 ...
Page 250: ...0 02 Samsung Electronics 5 38 ...
Page 262: ...0 02 Samsung Electronics 5 50 ...
Page 263: ...5 51 Samsung Electronics 5 2 Outdoor Unit 5 2 1 RVXVHT075 100FE RD075 100VHXFA ...
Page 264: ...Exploded Views and Parts List Samsung Electronics 5 52 RVXVHT075 100FE RD075 100VHXFA cont ...
Page 267: ...Exploded Views and Parts List 5 55 Samsung Electronics 5 2 2 RVXVHT125FE RD125VHXFA ...
Page 268: ...Exploded Views and Parts List Samsung Electronics 5 56 RVXVHT125FE RD125VHXFA cont ...
Page 279: ...Exploded Views and Parts List 5 67 Samsung Electronics 5 2 5 RD040 050MHXCA ...
Page 285: ...PCB Diagram 6 5 Samsung Electronics 6 1 4 Duct type Slim MAIN PCB ...
Page 288: ...0 02 Samsung Electronics 6 8 ...
Page 289: ...PCB Diagram 6 9 Samsung Electronics 6 1 5 Duct type MSP MAIN PCB ...
Page 291: ...PCB Diagram 6 11 Samsung Electronics 6 1 6 Duct type BIG MAIN PCB ...
Page 295: ...PCB Diagram 6 15 Samsung Electronics 6 1 7 Wall mounted type Neo Forte without EEV MAIN PCB ...
Page 298: ...0 02 Samsung Electronics 6 18 ...
Page 299: ...PCB Diagram 6 19 Samsung Electronics 6 1 8 Wall mounted type Neo Forte with EEV MAIN ...
Page 302: ...0 02 Samsung Electronics 6 22 ...
Page 303: ...PCB Diagram 6 23 Samsung Electronics 6 1 9 Wall mounted type Vivace MAIN PCB ...
Page 332: ...0 02 Samsung Electronics 7 16 ...