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
DC INVERTER AIR CONDITIONER TECHNICAL& SERVICE MANUAL V3.3
105
Fault
code
Fault Description
Possible Reason of Abnormality
How to Deal With
REMARKS
51
Drainage protection
1. The water level of the drain pan
exceed
safe level;
2. The cable of the water level switch
connect loose;
3.The water level switch is failure;
4. The control board is failure.
1. Check whether there are
something to block the drain hose or
the height of the drain hose is too
high;
1.2 Check the water pump and
replace the water pump if the water
pump is failure;
2. Reconnect the cable of the water
level switch refer to the wiring
diagram;
3. Replace the water level switch;
4. Replace the control board.
52
The grill protection
1.The grill has not been installed in
right
place;
2.The protection switch is failure;
3. The 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.
53
The upper panel is not in
place to protection
1. The front panel has been blocked;
2. The cable of the switch and the
motor
connect loose;
3. The switch is failure;
4. The panel motor is failure;
5. The indoor control board is failure.
1. Reassembly the front panel;
2. Reconnect the cable of the switch
and the panel motor;
3. Replace the switch components;
4. Replace the panel motor;
5. Replace the indoor control board.
54
The lower panel is not in
place to protection
1. The front panel has been blocked;
2. The cable of the switch and the
motor
connect loose;
3. The switch is failure;
4. The panel motor is failure;
5. The indoor control board is failure.
1. Reassembly the front panel;
2. Reconnect the cable of the switch
and the panel motor;
3. Replace the switch components;
4. Replace the panel motor;
5. Replace the indoor control board.
55
Mode Conflict Fault
The user set the conflicting mode for
more than two indoor units
Reset the operate mode for the
indoor unit, for the one outdoor unit,
the user should avoid to set the
conflicting operate mode with the
indoor units
ONLY FOR
MUTI-SPLIT
& VRF
TYPES
56
Water tank water
temperature sensor 1 fault
1. The cable of the water tank water
temperature sensor 1 connect loose;
2. The cable of the water tank water
temperature sensor 1 circuit is
abnormal;
3. The cable of the water tank water
temperature sensor 1 is failure.
1. Reconnect the cable of the water
temperature sensor 1;
2. Change the cable .
3. Replace the water
temperature sensor 1 .
4.Repalce indoor control board .
Only for heat
pump water
heater
