Westinghouse WHZ09WMA21S Service Manual page 22

★
8
9
10
★
11
★
12
★
13
★
14
★ ★
15
16
Current
★ ★
overload
protection
Maximum
current
protection
Communication
trouble
★
between
outdoor unit
and driver
Outdoor
EEPROM in
trouble
Outdoor
ambient
★
temperature
too low
protection
Compressor
exhaust
temperature
too high
protection
Outdoor
ambient
★
temperature
sensor in
trouble
Compressor
shell
temperature
too high
protection
Anti-freeze
protection with
cooling or
overload
protection with
heating in
a. The fan motor run abnormally;
b. The condenser and
c. The air inlet and outlet is
a. The outdoor control board is
b. The drive board is short
c. The other components is short
a. The connection wires
b. The outdoor board or drive
a. The EEPROM chip is loose;
b. The EEPROM chip inserted
c. The EEPROM chip is failure
Outdoor ambient temperature
too low
a. The compressor exhaust
b. The refrigerant of the unit is
a. The outdoor ambient
b. The outdoor ambient
c. The outdoor control board is
a. The compressor exhaust
b. The refrigerant of the unit is
a. The indoor coil temperature
b. The indoor coil temperature
- 21 -
evaporator is dirty;
abnormally
short circuit;
circuit;
circuit
connect loo se
board is failure;
with opposite direction;
temperature sensor is failure;
not enough
temperature sensor connect
loose;
temperature sensor is failure;
failure
temperature sensor connect
loose
not enough
sensor connect loose;
sensor is failure;
c. The indoor control board is
failure