Electra DELTA 18, Service Manual

Page: 78 / 110

13-2
TROUBLESHOOTING
SM DELTA 1-E.0 GB
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
fans working. -Overload safety device on
compressor is cut out (low voltage
or high temperature).
-Compressor runs 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.
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 over flow 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
thoroughly.
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 below
design conditions.
-Outdoor unit air outlet is blocked.
-Replace thermistor.
-Repair control cable.
-Shut unit off, it cannot work properly.
-Remove obstructions.
17. Unit is in heat mode
but operating in
cooling. -Faulty RV coil.
-RV coil is ok valve is stuck position.
-Replace RV coil.
-Replace the reversing valve.