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191
TROUBLESHOOTING
Indoor Fault Code
Fault
code
Fault Description
Possible Reason of Abnormalit y
How to Deal With Re marks
74
Indoor EEPROM
Data 2 error
Replace EE data in MCU.
81
EE in MCU is failure, the unit can
run, but the function user has set
is ineffective.
Indoor ambient
Temperature
Sensor Fault
1. The cable of the room
temperature sensor connect
loose;
2. The room temperature sensor
is failure;
3. The sampling circuit is abnormally
83
1. Reconnect the cable of the
room temperature sensor;
2. Replace the room temperature
sensor;
3. Replace the indoor control
board.
Evaporator Middle
Temperature
Sensor Fault
1.The cable of the coil temperature
sensor of the evaporator is
failure;
2. The coil temperature sensor of
the evaporator is failure;
3. The sampling circuit is abnormally
FE
(254)
1. Reconnect the cable of the
coil temperature sensor of the
evaporator;
2. Replace the coil
temperature sensor of the
evaporator;
3. Replace the indoor
control board.
C ommunication
between main control
board &Wiring
remote controller
Fault (display on
wiring remote
controller)
1.
2.
the wiring controller to the
indoor control board;
Reconnect the wiring between
the wiring controller to the
indoor control board;
Replace the wiring between
1. The wiring between the
wiring controller to the indoor
control board connect loose;
2. The sequence of the wiring
between the wiring controller
to the indoor control board
is wrong;
3. The wiring between the
wiring controller to the indoor
control board is failure;
4.The wiring controller is failure;
5. The indoor control board
is abnormally .
ER
3. Replace the wiring between
the wiring controller to the
indoor control board;
4. Replace the wiring controller;
5. Replace the indoor control
Board.
C ommunication
between main
control board
&display board Fault
(displays on display
board)
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.
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.
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