PROBLEM
POSSIBLE CAUSE
SOLUTION
Suction temperature &
suction pressure are too
low.
Room temperature is too low.
Dusty Evaporator.
R.P.M. of the fan motor is low.
Air return of the evaporator is blocked.
Air supply of the evaporator is blocked.
Increase the room temperature.
Clean the evaporator.
Increase the R.P.M. of the motor.
Remove the blockade.
Remove the blockade.
Discharge pressure is
too high.
Condenser is too dusty.
Air return of the condenser is blocked.
Exhaust tubes of the condenser is pressed
or blocked.
R.P.M. of the down motor too low.
Too much refrigerant.
Room temperature too high.
Clean the condenser.
Remove the blockade.
Check the exhaust tubes.
Increase the R.P.M..
Release all the refrigerant, vacuum then
recharge. * For correct refrigerant
amount, please refer to the rating label
at the back of the unit. The deviation
should be within 3g.
Re-switch the unit after the temperature
drops down.
Discharge temperature
is too high.
Refrigerant is too less or has been leaked.
Condenser too dusty.
Air return of the condenser is blocked.
Air supply of the condenser is blocked.
R.P.M. of down motor too low.
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.
Clean the condenser.
Remove the blockade.
Remove the blockade.
Discharge pressure too
low
Room temperature too low.
Refrigerant is too less or has been leaked.
R.P.M. of the down motor too high, thus
the air volume is too big.
This is normal situation, please
increase the room temperature.
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.
Adjust the R.P.M. of the down motor to
the acceptable one.
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