Hisense GBF18H-S User Manual page 113

7 . T R O U B L E S H O
7 . T R O U B L E S H O
Fault
Fault Description
code
Communication between
main control board
ER &display board Fault
（displays on display
board）
NOTE 1:
If the indoor unit can not turn on or the indoor unit turn off itself after 30s, at the same time the unit do
not display the error code, please check the fire and the socket of the control board.
Note 2:
If the indoor unit display the 75,76,77,78 error code after you turn on the unit, please check the TEST
seat of the indoor control board or the TEST detection circuit whether exists short circuit.
Note 3:Overload in cooling mode
sr. The root cause
1 The refrigerant is excessive
2 The outdoor ambient temperature is too high
The air outlet and air inlet of the outdoor unit is short-circuit
3
The outdoor heat exchanger is dirty, such as condenser
4
5 The speed of the outdoor fan motor is too low
The outdoor fan is broken or the outdoor fan is blocked
6
7 The air inlet and outlet has been blocked
8 The expansion valve or the capillary is failure
Note 4:Over load in heating mode
sr. The root cause
ON/OFF UNITARY AIR CONDITIONER TECHNICAL& SERVICE MANUAL V6.0
O T I N G
O T I N G
Possible Reason of Abnormality
1.The wiring between the display board
to the indoor control board connect
loose;
2.The sequence of the wiring between
the display board to the indoor control
board is wrong;
3.The wiring between the display board
to the indoor control board is failure;
4. The display board is failure;
5. The indoor control board is failure.
Overload in heating mode
1. Reconnect the between the display
board to the indoor control board;
2. Replace the wiring between the
display board to the indoor control
board;
3. Replace the wiring between the
display board to the indoor control
board;
4. Replace the display board;
5. Replace the indoor control board.
overload in cooling mode
Corrective measure
Discharge the refrigerant, and recharge the refrigerant refer to the
rating label
Please use within allowable temperature range
Adjust the installation of the outdoor unit refer to the user manual
Clean the heat exchanger of the outdoor unit, such as condenser
Check the outdoor fan motor and fan capacitor
Check the outdoor fan
Remove the blocked thing
Replace the expansion valve or the capillary
Corrective measure
How to Deal With
111
REMARKS