The refrigerant leaked
completely
refill up refrigerant after
checking the leak source.
The system blocked completely
Check capillary tube,strainer
etc. repair or replace them.
The room is too large ;the
window or door is not closed.
Close the window and door
The set temperature is too low.
Heighten the set temperature.
refill up refrigerant after
checking the leak source.
The system blocked slightly
Check capillary tube, strainer
etc. repair or replace them.
The outdoor temperature is too
low.
The A/C can’t melt down frost
or
Replace this sensor or move
the sensor to the thickest
position of frost
The indoor or outdoor motor
speed is lower
The compressor suction or
venting capability is very poor
Four-way valve slight mixes up
Let the four-way valve moving
continually. Replace the
four-way valve if it can’t move
The capillary valve has been
blocked.
Replace this capillary valve
The fan doesn’t run (motor or
capacitor of fan failed, Poor
contact for the line of capacitor,
line or PCB fault.).
Check. Repair and replace.
The compressor doesn’t
work(the voltage is too low or
high, overload, wiring error. The
compressor failed. The
capacitor of compressor
failed.the capacity of electric
fence isn’t enough. )
Check. Repair and replace.
refill up refrigerant after
checking the leak source.
The system blocked completely
Check capillary tube,strainer
etc. repair or replace them.
The compressor is blocked
The four-way valve failed and
can’t replace direction.
Check the circuit and replace
the four-way valve.