Electra LEX 25 DCI Service Manual page 89

TROUBLESHOOTING
No. Fault
No cooling or
heating takes
place, indoor
20
and outdoor fans
working.
No air supply
at indoor unit,
21
compressor
operates.
Partial, limited air
22 supply at indoor
indoor unit.
Water accumulates
23 and overflow from
indoor unit section.
Water dripping
from outdoor unit
24
base. (in heating
mode)
Freeze-up of
outdoor coil in
heating mode, poor
25
heating effect in
room, indoor fan
operates.
13-6
Probable Cause
- Overload safety device
on compressor is cut
out (low voltage or high
temperature)
- Compressor run
capacitor faulty.
- Compressor windings
are shorted.
-Indoor fan motor is
blocked or turns slowly.
-indoor fan run capacitor
faulty.
- motor windings are
shorted.
Lack of refrigerant
(will accompanied by
whisteling noise) cause ice
formation on indoor unit
coil in cooling mode.
Drain tube or spout of
drain pan clogged.
Water drain outlet is
clogged.
-Faulty outdoor thermistor.
-Faulty control cable.
- Outdoor temperature is
too low (below -2°C)
-Outdoor unit air outlet is
blocked.
CONTENTS
Corrective Action
- Check for proper voltage,
switch off power and try
again after one hour.
- Replace compressor
capacitor.
- Replace compressor.
- Check voltage,repair wiring
if necessary.
-Check fan wheel if it is
tight enough on motor
shaft,tighten if necessary.
-Replace indoor fan motor.
-Charge the unit after
localizing leak.
-Disasemble plastic drain
tube from spout of indoor unit
drain pan.
-Open outdoor unit cover
clean out water outlet ,clean
the base inside througly.
-Replace thermistor.
- Repair control cable.
- Shut unit off, outdoor temp.
is below design conditions
and cannot function properly.
-Remove obstructions.
SM LEXDCI 1-E.1 GB