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Shinco Service Manual
- 54 -
3
COMMUNICATION FAULT
BETWEEN INDOOR UNIT AND
OUTDOOR UNIT
E4
1．CHECK IF THE CONNECTING WIRING IS CONNECT
WELL
2．TEST THE VOLTAGE VALUE BETWEEN L4 AND S,
IF IT ‘S CHANGE REGULARLY，THE SINGAL
TRANSFERING BETWEEN INDOOR AND OUTDOOR UNIT
IS GOOD，
WHEN IT‘S NO CHANGE
IF VALUE IS BELOW 14V， THE INDOOR PCB BOARD
IS FAULT，CHANGE IT.
IF VALUE IS OVER 14V,THE OUTDOOR PCB IS FAULTY
3）CHECK IF THERE IS LED FLASHING ON THE
OUTDOOR PCB
IF THERE IS NO FLASHING，CHECK VOLTAGE VALUE
FROM POWER BOARD TO PFC BOARD, BETWEEN ACL AND
CAN ON PFC BOARD
IF IT’S NOT 220V, CHANGE POWER BOARD
IF IT’S 220V,CHANGE PFC BOARD
1．FIX THE WIRING AGAIN。
2．CHANGE RELATE PCB BOARD
4
COMPRESSOR DRIVER BOARD
IS
EA
CHECK OUTDOOR DRIVER BOARD CHANGE DRIVER BOARD
5
OURDOOR AIR SENSOR IS
FAULTY
6
OUTDOOR PIPE SENSOR IS
FAULT
E6
1、 CHECK THE SENDOR VALUE
2、 POWER BOARD IS FAULT
CHANGE SENSOR
CHANGE POWER BAORD。
7
INDOOR AIR SENSOR IS
FAULTY
E1
8
INDOOR PIPE SENSOR IS
FAULTY
E2
3、 CHECK THE SENSOR VALUE
4、 INDOOR BOARD IS FAULT
CHANGE SENDOR
CHANGE INDOOR BOARD
9 POWER BOARD IS FAULT E8 OUTDOOR POWER BOARD IS FAULT CHANGE THE POWER BOARD
10 POWER BOARD IS FAULT E9 OUTDOOR POWER BOARD IS FAULT CHANGE THE POWER BOARD
11 DRIVER BOARD IS FAULT E5
DRIVER BOARD IS FAULT DRIVER BOARD IS FAULT
12
OUDOOR COMMUNICATION
FAULTY
EC
CHECK IF WIRINGS BETWEEN POWER BOARD AND
DRIVER BOARD ARE CONNECTED WELL
FIX THE WIRING BETWEEN POWER BOARD AND
DRIVER BOARD