Westinghouse WHU09CTA21S, Service Manual, Page: 40 / 90

The following is the fault code table of indoor unit .
Table 2 Indoor fault code
Fault
code Fault
d
escription Possible
r
eason
s for a
bnormality How to
d
eal
w
ith Remarks
51 Drainage protection
1. The water level of the drain
pan exceed safe level;
2. The cable of the water level
switch is connect ed loose ly ;
3. The water level switch fail s ;
4. The control board fail s .
1.1 Check whether there is
something block ing 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 fail s ;
2. Reconnect the cable of the
water level switch refer ring
to the wiring diagram;
3. Replace the water level
switch;
4. Replace the control board.
55
Mode c onflict f ault
The user set the conflicting mode for
more than two indoor units .
Reset the operat ion mode for the
indoor unit, for with one outdoor
unit, the user should avoid set ting
the conflicting operat ion mode
with the indoor units.
64
Communication
between Indoor
& Outdoor unit
Fault
1. T he indoor unit and the outdoor
unit are not connect ed properly ;
2. The communication cable is
connect ed loose ly ;
3. The communication cable
between the indoor unit and the
outdoor unit is failure or the cable
between the indoor control board
to terminal fails or the cable
between the outdoor control board
to the terminal fails ;
4. The indoor control board fail s ;
5. The outdoor control board fail s .
1. Reconnect the connection
cable refer ring to the indoor
and outdoor wiring diagram;
2. Reconnect the
communication cable
refer ring to the indoor and
outdoor wiring diagram;
3. Replace the communication
cable refer ring to the indoor
and outdoor wiring diagram;
4. Replace the indoor control
board;
5. Replace the outdoor control
board.
71
Indoor unit zero
check fault
1. The motor wire is loosen;
2. The motor connect ion is open;
3. The motor fail s ;
4. Control board fail s .
5. Indoor fan is baffled.
1.Replace the motor wire and
make sure the wire connect
is well;
2. Replace the motor wire;
3. Change the motor;
4. Change the indoor control
board;
5. Check and elimination of
fan motor rotation.
72 Indoor fan motor fault
1. The cable of the indoor fan
motor is connect ed loose ly ;
2. The cable of the indoor fan
motor fails;
3. The indoor fan motor fail s ;
4. The indoor control board fail s .
1. Reconnect the cable of the
fan motor;
2. Replace the cable of the fan
motor;
3. Replace the fan motor;
4. Replace the indoor control
board;
5. Check the indoor fan and
ensure the indoor fan can
run normally.
73
Indoor EEPROM
Data
1 fault
1.
2.
Indoor EE components fail s ;
The control circuit of the EE
components fail s ;
3. The EE components has been
inserted in opposite direction.
1.
2.
Replace the EE components;
Replace the indoor control
board;
3. Reassembly the EE
components of the indoor
control board.
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