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16
★
x
17
x
★
18
x
★
x
★
19
x
★
20
21
x
x
22
24
26
27
33
Ο
★
too high
protection
Anti-freeze
protection with
cooling or
★
overload
protection with
heating in
x
PFC protection
DC
compressor
★
start failure
Ο
Compressor
drive in trouble
Ο
Outdoor fan
motor locked
rotor protection
Outdoor coil
anti-overload
Ο
protection with
cooling
Compressor
pre heating
process
Chip in outdoor
board in
trouble
Overheated
outdoor radiator
Protection
against too high
system
pressure
The failure for
temperature
Ο
sensor of
indoor room
b. the refrigerant of the unit is not
enough
a. the indoor coil temperature
sensor connect loose;
b. the indoor coil temperature
sensor is failure;
c. the indoor control board is failure
d. the refrigerant system is
abnormal.
a. the PFC is failure;
b. the outdoor drive board is failure
a. the outdoor drive board is
failure;
the compressor is failure
a. the outdoor drive board is
failure;
b. the compressor is failure
c. the outdoor control board is
failure
a. the connection of the outdoor
fan motor is loose;
b. there are something block the
outdoor fan;
fan motor is failure;
d. the outdoor control board is
failure
a. the refrigerant is too much;
b. the outdoor fan motor is failure;
c. the outdoor fan is broken;
d. the condenser is dirty;
e. the air inlet and air outlet of the
indoor unit and the outdoor unit is
not normally
it is normal mode in cold weather
a. Using the wrong drive board;
b. Using the wrong compressor.
a. Radiator sensor fails
b. Detection circuit of the
sensor on the control panel
fails
a. The pressure switch fails
b. The pressure detection
switch on the control panel fails
c. The measured value of
system pressure exceeds the
limit
d. The indoor room temperature
sensor loose;
e. The indoor room temperature
sensor is failure;
73
b.
c. the
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