Tadiran Telecom ANL-100 Service Manual page 37

SKY
General Troubleshooting (continued).
Symptom
In Cool mode: high
4
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.
No air supply at
6
indoor unit
(compressor
operates).
Low Capacity.
7
In Heat mode: only
8
compressor runs,
outdoor and indoor
fan motors are
stopped.
AIR CON indicator
flashes.
Probable Cause
1. Run capacitor of outdoor
fan motor is burnt.
2. Winding of outdoor fan
motor is shorted.
1. Overload safety device on
compressor is cut out due
to high temperature.
2. Compressor run capacitor
is burnt.
3. Compressor winding
shorted.
4. Pressure is too high.
1. Indoor fan motor is blocked
or turns slowly.
2. Indoor fan motor capacitor
is burnt.
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 run
capacitor.
2. Replace outdoor fan motor.
1. Switch Off power and try again after
one hour.
2. Replace compressor run capacitor.
3. Replace compressor.
4. Check HP controller. Press RESET
button.
1. Check voltage. Repair wiring if
necessary.
2. Check indoor fan wheel if tight on
motor shaft. Tighten if necessary.
3. Replace indoor fan motor capacitor.
4. Replace indoor fan motor.
5. Normal software delay (max. 20 sec.).
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.
37 -