Airwell YCF055, Service Manual

Page: 88 / 113

13-2
TROUBLESHOOTING
SM FBFRPM 1-A.0 GB
ATTENTION : check for broken or loose cable lugs fi rst
NO SYMPTON PROBABLE CAUSE CORRECTIVE ACTION
9. Only indoor fan and
compressor working. Outdoor fan blocked. - Remove obstructions.
10. Only indoor fan
working.
-Run capacitor of outdoor
fan motor faulty.
-Windings of outdoor fan
are shorted.
- Replace capacitor.
-Replace motor.
11. No cooling or heating
takes place, indoor
and outdoor fans
working.
- Overload safety device on
compressor is cut out (low
voltage or high
temperature)
- Compressor run capacitor
faulty.
- Compressor windings are
shorted.
- Check for proper voltage, switch off power
and try again after one hour.
- Replace compressor capacitor.
- Replace compressor.
12. No air supply at
indoor unit,
compressor
operates. -Indoor fan motor is blocked
or turns slowly.
-indoor fan run capacitor
faulty.
- motor windings are
shorted. - Check voltage,repair wiring if necessary.
-Check fan wheel if it is tight enough on
motor shaft,tighten if necessary.
-Replace indoor fan motor.
13. Partial, limited air
supply at indoor unit.
Lack of refrigerant (will
accompanied by whisteling
noise) cause ice formation
on indoor unit coil in cooling
mode. -Charge the unit after localizing leak.
14. Water accumulates
and over fl ow from
indoor unit section.
Drain tube or spout of drain
pan clogged. -Disasemble plastic drain tube from spout of
indoor unit drain pan.
15. Water dripping from
outdoor unit base.
(in heating mode)
Water drain outlet is
clogged. -Open outdoor unit cover clean out water
outlet ,clean the base inside througly.
16.
Freeze-up of outdoor
coil in heating mode,
poor heating effect in
room, indoor fan
operates. -Faulty outdoor thermistor.
-Faulty control cable.
- Outdoor temperature is
too low (below -10°C)
-Outdoor unit air outlet is
blocked.
-Replace thermistor.
- Repair control cable.
- Shut unit off, outdoor temp. is below design
conditions and cannot function properly.
-Remove obstructions.