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×
★
20
21
22
24
26
27
33
o
x
34
o
x
Ο
★
36
×
Ο
Outdoor fan
motor locked
rotor protection
Outdoor coil
anti-overload
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
x
★
sensor of
indoor room
The failure for
temperature
★
x
sensor of
indoor coil
temperature
×
★
Communicatio
n failure
between the
indoor unit and
outdoor unit
70
c. the outdoor control board is
failure
a. the connection of the outdoor
fan motor is loose;
there are something block the
outdoor fan;
the fan motor is failure;
d. the outdoor control board is
failure
a. the refrigerant is too much;
b. the outdoor fan motor is
failure;
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
a. The indoor room temperature
sensor loose;
b. The indoor room
temperature sensor is failure;
c. The indoor control board is
failure.
a. The indoor coil temperature
sensor loose;
b. The indoor coil temperature
sensor is failure;
c. The indoor control board is
failure.
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;
b.
c.
c.
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