7
7
.
.
T
T
R
R
O
O
U
U
B
B
L
L
E
E
S
S
H
H
O
O
O
O
T
T
I
I
N
N
G
G
ON/OFF UNITARY AIR CONDITIONER TECHNICAL& SERVICE MANUAL V5.0
102
Fault
code
Fault Description
Possible Reason of Abnormality
How to Deal With
REMARKS
36
Communication between
Indoor and outdoor fault
1. The connection cable between the
indoor
unit and the outdoor unit connect
wrong;
2.The communication cable between
the
indoor unit and the outdoor unit
connect
loose or the cable between the indoor
control board to terminal connect loose
or
the cable between the outdoor control
board to the terminal connect loose;
3.The indoor control board is failure;
4. The outdoor control board is failure;
1. Reconnect the connection cable
refer to the indoor and outdoor
wiring diagram;
2. Reconnect the communication
cable refer to the indoor and outdoor
wiring diagram;
3. Replace the communication cable
refer to the indoor and outdoor
wiring diagram;
4.Replace the indoor control board;
5. Replace the outdoor control board.
Only for
MUTI-SPLIT
37
Humidity sensor failure
1.The cable of the humidity sensor
connect
loose;
2.The humidity sensor is failure;
3. The indoor control board is failure.
1. Reconnect the cable of the
humidity sensor;
2. Replace the humidity sensor;
3.Replace the indoor control board.
Only for
MUTI-SPLIT
38
EEprom Data error
1. EE components is failure;
2. The EE control circuit of the control
board
is failure;
3. The EE components has been
inserted
with opposite direction.
1. Replace the EE components;
2. Replace the control board;
3. Reinsert the EE components.
Only for
MUTI-SPLIT
39
The indoor DC fan motor
fault
1. The cable of the DC fan motor
connect
loose;
2. The indoor control board is failure;
3.The indoor fan motor is failure.
1. The cable of the DC fan motor connect
loose;
2. The indoor control board is failure;
3.The indoor fan motor is failure.
Only for
MUTI-SPLIT
40
The grill protection
1.The grill has not been installed in
right
place;
2.The protection switch is failure;
3.The indoor control board is failure.
1. Adjust the grill and put it in right
place;
2. Replace the switch components;
3. Replace the indoor control board.
Only for
MUTI-SPLIT
41
Zero check fault
Control board is failure.
Replace the indoor control board.
PG motor
