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SKY
General Troubleshooting (continued).
Symptom
4
In Cool mode: high
pressure, or;
In Heat mode:
outdoor
coil freeze.
Only indoor fan
5
motor and outdoor
fan motor are
working. No
cooling and/or
heating take place.
6
No air supply at
indoor unit
(compressor
operates).
7
Low Capacity.
8
In Heat mode: only
compressor runs,
outdoor and indoor
fan motors are
stopped.
Probable Cause
1. Winding of outdoor fan
motor is shorted.
1. Overload safety device on
compressor is cut out due
to high temperature.
2. Compressor winding
shorted.
3. Pressure is too high.
1. Indoor fan motor is blocked
or turns slowly.
2. Loose or broken V-belt.
3. Indoor fan motor winding is
burnt.
4. In Heat mode: delayed
start for indoor fan motor.
5. Clogged air filters.
1. Lack of refrigerant (will be
accompanied by whistling
noise); causes ice
formation on the
evaporator coil (in Cool
mode).
2. Clogged air filters.
A/C operates in De-Icing cycle.
Corrective Action
1. Replace outdoor fan motor.
1. Switch Off power and try again after
one hour.
2. Replace compressor.
3. Check HP controller. Press RESET
button.
1. Check voltage. Repair wiring if
necessary. Check indoor fan wheel if
tight on motor shaft. Tighten if
necessary.
2. Tighten or replace V-belt.
3. Replace indoor fan motor.
4. Normal software delay (max. 20 sec.).
5. Clean filters.
1. Unit must be charged (according to
the nameplate) after localizing the gas
leak.
2. Clean filters.
Wait (max.) 10 min. until the A/C resumes
to normal operation.
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