Electra DNG 18 - Page 97

14-2
TROUBLESHOOTING
Revision Y05-01 Service Manual - DNG Series
ATTENTION : check for broken or loose cable lugs first
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 whistling
noise) cause ice formation
on indoor unit coil in cooling
mode.
-Charge the unit after localizing leak.
14. Water accumulates
and overflow from
indoor unit section.
Drain tube or spout of drain
pan clogged.
-Disassemble 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 -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.
CONTENT