35
Faults & self-diagnoses
Short circuit
Voltage >198v
Repair the leakage and
add refrigerant
High pressure is high
(condensation pressure)
No
Yes
Yes
No
Cooling system abnomality
Check the voltage between L.N
If power
suppy
Check the compressor
Compressor overload
protection
Ice avoid start
Heating overload start
Compressor stop
immediatey after
starting
Resistance of compr
-essor short circuit
Resistance of compr
-essor open circuit
(see attachment)
Compressor capacitor
fault
Low voltage
Refrigerant lackage
Air filter blocked
Air inlet blocked
Indoor coil blocked
by oil
Clean the filter
Check air circuit
Change the compressor
Change the capacitor
Refrigerant leak
Pipe length>4m,but
havn't add refrigerant
Air cycle block
Cooling:outdoor
Heating:indoor
Indoor & outdoor motor
stop
Exceed the temp rang
allowed but run overlo
-ad
Too much refrigerant
or air mixed
Add refrigerant
Check the air cycle
Check indoor & outdoor
fan
Check the ambien temp
Check the pressure
≤
26.5kg/cm
2