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★
★
7
8
9
x
★
10
Ο
x
11
12
Ο
x
13
★
★
14
x
Ο
15
x
Communicatio
n failure
between the
indoor unit and
outdoor unit
Current
overload
protection
Maximum
current
protection
x
Communicatio
n trouble
between
outdoor unit
and driver
x
Outdoor
EEPROM in
trouble
Outdoor
ambient
temperature
too low
protection
Compressor
★
exhaust
temperature
too high
protection
Ο
Outdoor
ambient
temperature
sensor in
trouble
★
Compressor
shell
temperature
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.
a. the fan motor run abnormally;
b. the condenser and evaporator is
dirty;
inlet and outlet is abnormally
a. the outdoor control board is
short circuit;
b. the drive board is short circuit;
c. the other components is short
circuit
a. the connection wires connect
loose
b. the outdoor board or drive
board is failure;
a. the EEPROM chip is loose;
b. the EEPROM chip inserted with
opposite direction;
c. the EEPROM chip is failure
Outdoor ambient temperature too
low
a. the compressor exhaust
temperature sensor is failure;
b. the refrigerant of the unit is not
enough
a. the outdoor ambient temperature
sensor connect loose;
b. the outdoor ambient
temperature sensor is failure;
c. the outdoor control board is
failure
a. the compressor exhaust
temperature sensor connect loose
72
c. the air
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