d.
the refrigerant system is
abnormal.
17
PFC protection
a.
the PFC is failure;
b.
the outdoor drive board is
failure
18
DC compressor
start failure
a.
the outdoor drive board is
failure;
b.
the compressor is failure
19
Compressor
drive in trouble
a.
the outdoor drive board is
failure;
b.
the compressor is failure
c.
the outdoor control board is
failure
20
★
Outdoor fan
motor locked
rotor protection
a.
the connection of the outdoor
fan motor is loose;
b.
there are something block the
outdoor fan;
c.
the fan motor is failure;
d.
the outdoor control board is
failure
21
Outdoor coil
anti-overload
protection with
cooling
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
22
Compressor
pre heating
process
it is normal mode in cold
weather
24
Chip in outdoor
board in trouble
a.
Using the wrong drive board;
b.
Using the wrong compressor.
26
Overheated
outdoor radiator
a.
Radiator sensor fails
b.
Detection circuit of the
sensor on the control panel
fails
27
Protection
against too high
system
pressure
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
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