FAULT DIAGNOSIS BY SYMPTOM
No cooling
effect at all
Fan motor
error
Fan motor or its capacitor faults.
Loose connection or badly contact.
compressor
does not operate
Control circuit error.
Voltage may appear a little lower or higher.
Loose or wrong connection.
Compressor faults or jumps for overloading.
Control circuit error.
Leakage of
refrigerant
Recharge the refrigerant at leaking place.
Block of the cooling
system
Poor cooling
efficiency
Insufficient
refrigerant
Some cracks, welding failure in the system.
Air filter is
blocked
No periodical cleaning.
Accumulated lampblack, dust or
Accumulated lampblack, dust or contaminated
ambient environment.
Too high ambient
temperature
The outdoor unit gets exposed to the sun for too
long period.
Air conditioning burden
is not adequate for the
room
The capillary, pipeline are blocked or the valve
is not open or the connecting tube is folded flat.
The doors and windows are not closed well;
too weak of input cooling power or too many
heat resources in the room.
Some leakage in the valve.
No cooling
The four-way
valve error
Blockage in
the system
The valve is not completely open; the capillary or
Pipeline is half blocked.
Connecting tube is folded flat.
The distributing air of the four-way valve may have mixed
together; the valve core or solenoid valve faults.
Low airflow volume
Low fan motor frequency or capacitor is not
functional.
Low fan speed or the fan motor faults.
Extra fluorin is added during mounting.
Mounting location is not suitable, such as near the wall.
Air outlet is blocked or accumulated lampblack
or dust is attached to the vane.
Poor efficiency of
heat dissipating on
the outdoor unit
Not for residential use.
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