Blockage of filter of indoor unit
Bad cooling (heating)
Clean filter regularly
Blockage of heat exchanger of outdoor unit
Clean the dust deposited on the suface of heat
exchanger
Change compressor
Change capillary
Leakage occurs between high and low pressure
inside compressor
Partial blockage of capillary
Leakage of refrigerant
Find out leakage and charge refrigerant
Change one-way valve
Blockage in one-way valve of outdoor unit
Fan doesn't run when
FAN mode is set
Burn or wire break of indoor fan
W rong wire connection
Circuit-break or damaged of fan capacitor
B reak of loop of relay
Repair or change fan motor
Connect the circuit diagram correctly
Change the fan capacitor with the same model
and specification
Change relay
Change relay
Adjust set temperature
Change fan motor
Loose contact of relaly
Improper of set temperature
Outdoor unit and
compressor don't
run when unit is
cooling or heating
When unit is cooling or
heating, compressor
runs but outdoor
fan doesn't run
Breakage of outdoor fan
Wrong wire connection
Breakage of capacitor of outdoor fan
Malfunction of compressor
Connect wire correctly depend on circuit diagram
Change capacitor of fan
Change compressor
When cooling or
heating, outdoor
fan runs, compressor
doesn't run.
Water leakage
Breakage of running capacitor of compressor
Voltage is low or high
Wrong wire connection
Blockage or breakage of drainage hose
Change capacitor
Preparation of manostat is recommended.
Connect wire correctly depend on circuit diagram
Change drainage hose
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