13-6
TROUBLESHOOTING
SM WNGDCI 2-E.4 GB
No.
Fault
Probable Cause
Corrective Action
20
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.
21
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.
22
Partial, limited air
supply at indoor
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.
23
Water accumulates
and overflow from
indoor unit section.
Drain tube or spout of
drain pan clogged.
-Disasemble plastic drain
tube from spout of indoor unit
drain pan.
24
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.
25
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 -2°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.
CONTENTS
