Westinghouse WHZ09WMA21S Service Manual page 21

0
1 x
2
★
5
★
6
★
7
Normal
The failure for
temperature
x x
sensor of
outdoor coil
Compressor
exhaust
★
temperature
sensor in
trouble
IPM module
protection
AC voltage
★
higher or lower
protection
Communication
failure between
★
the indoor unit
and outdoor
unit
- 20 -
a. The outdoor temperature
sensor loose;
b. The outdoor temperature
sensor is failure;
c. The indoor control board is
failure
a. T he compressor exhaust
temperature sensor connect
loose;
b. The compressor exhaust
temperature sensor is failure;
c. The outdoor control board is
failure
a. The IPM board is failure;
b. The outdoor fan is broken;
c. The outdoor fan motor is
failure;
d. The outdoor fan has been
blocked ;
e. The condenser is dirty;
f. The outdoor unit has been
installed without standard.
a. The supply voltage is higher
or lower than normal;
b. The inner supply voltage of
the unit is higher or lower than
normal
a. The communication cable
connect loose;
b. The communication cable is
failure;
c. The connection between the
filter board and the outdoor
control board is incorrect or
loose;
d. The connection between the
filter board and the terminal is
incorrect or loose;
e. The indoor control board is
failure;
f. The PFC board is failure;
g. The power board is failure;
h. The outdoor control board is
failure.