21
Model No: AC-W17CL
Version 1.0
(4) Poor Heating or no heat during Cooling Operation
Symptom
Possible cause
Remedy
Temperature controller damaged or
malfunctioning
Replace temperature controller
Circulating air flow decreased, dust
accumulates on the air filter of air
conditioner through extended operation
Wash off dust on the filter and replace it after
it is dried
Dust accumulated on fins of the air
conditioner, resulting in insufficient air
flow
Remove dust with a long-hair brush or
compressed air
Capillary in the heating circulation system
clogged, causing malfunctioning of the
system or reduction in heating effect
Re-evacuate and fill refrigerant or replace the
capillary (and filter, etc.)
Piping in the system improperly welded or
copper tubes damaged, resulting in leakage
of refrigerant
Do patch welding after leak test and replenish
refrigerant.
Damaged capacitor of the fan or its poor
contact, or damaged motor of the fan or
failure of power line to the fan, resulting
in failure to operate or reduced speed of
the fan and hence unavailability of cool
air or poor cooling effect.
Inspect the power line, switches,
temperature controller and terminal block,
etc. and replace the capacitor or motor.
Failure of compressor due to too high (or
too low) voltage or incorrect wiring of
power line or discontinuity of the circuit
or any fault in compressor itself (e.g.
motor burned or seized or valve plate
damaged)
Furnish a voltage regulator or replace any
damaged part.
A too high heating load
Check for the expected heating load
A too low set temperature
Adjust the set temperature
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4- way valve fault
Replace the 4-way valve
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