PROBLEM
POSSIBLE CAUSE
SOLUTION
Compressor works but
the fan doesn’t.
Bad connection of the wires.
Fan motor breaks down.
Fan motor capacitor breaks down.
P.C. board breaks down.
Fan blade is stuck.
Check and reconnect or replace.
Check and replace.
Check and replace.
Check and replace.
Fix it.
Big noise
Screws/nuts of the fan for evaporator/
condenser come loose.
Screws/nuts of the compressor come loose.
Fan blade is blocked by something.
Check and fasten.
Check and fasten.
Remove the blockade.
Big vibration
Screws/nuts of the compressor come loose.
Fan of the evaporator or condenser does
not fix well or is deformed.
The metal tubes inside the machine hit the
other parts.
Check and fasten.
Check and replace.
Adjust the position of the tubes.
Motor doesn’t work.
Wires problem.
Loose terminal connection.
Motor breaks down.
Motor capacitor breaks down.
The fan blade is stuck.
Check and replace.
Check and fasten.
Check and replace.
Check and replace.
Fix it.
Auto-drainage system
doesn’t work.
Wires problem.
Pump motor breaks down.
Bad installation of the water pump.
Micro switch breaks down.
Check and replace.
Check and replace.
Re-install.
Check and replace.
Suction pressure is too
low while the suction
temperature is too high.
Blocked capillary
Blocked evaporator.
Blocked refrigerant filter.
Insufficient refrigerant or the refrigerant
has been leaked.
Replace the capillary.
Use high pressure N
2
to clean the
evaporator or replace it.
Replace the refrigerant filter.
Release the remained refrigerant,
vacuum the unit (at least over
755mmHg). Recharge the unit. For
correct refrigerant amount, please refer
to the rating label at the back of the
unit. The deviation should be within 3g.
2
