Airwell HAF 12, Руководство по обслуживанию

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13-2
TROUBLESHOOTING
SM HAFRPM 1-A.3 GB
NO SYMPTON PROBABLE CAUSE CORRECTIVE ACTION
8 No cooling or
heating only indoor
fan works. Outdoor fan motor faulty or
other fault caused, compressor
overload protection cut out. -Replace P.C.B.
-Outdoor fan blocked remove
obstructions.
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.
CONTENTS