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Feature
No power source
Power source
normal
but can not start
Switch normal but
cannot start
Feature
Evaporated temperature
indicate too low
Evaporated temperature
indicate too high
Reason
Fuse broken or fuse switch
tripped
Wire broken
Power source abnormal or the
dia. of wire too small
Switch poor
Connector poor
Overload relay poor
Capacitor poor
Start relay poor
High-low pressure switch poor
Temperature switch poor
Compressor poor
High-low voltage switch tip no
reversion
Electromagnetic no reversion
High temperature no reversion
Temperature
setting
errors
Compressor poor
Reason
Evaporate
meter poor
Expansion valve blocked
Temp. switch or pressure
switch setting too low
Refrigerant leaking
Condition temp. too high
Hot air bypass valve fault
Condenser blocked
Too air capacity
The
compressor
plate poor
Fault Exclude
Confirm the power source
leak of phase ,short circuit
or not
Check the fuse or closed
the fuse switch
Check the wire , repair
Select according to the rate
voltage on the nameplate
Replace the switch
Replace connector
Replace overload relay
Replace capacitor
Replace start relay
Replace high-low pressure
switch
Replace temperature switch
Replace compressor
Check and reset
Check and reset
Check and reset
poor
Reset or replace the switch
Replace compressor
Fault Exclude
temperature
Replace the evaporator
temperature meter
Replace expansion valve
Adjust and reset
Check the leaking point and
filling the refrigerant
Select the position and
improve the ventilation
Adjust or replace the bypass
valve
Clean
Redesign
valve
Replace the compressor
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