AUX ASW-09A4/H - Classification of Common Faults; Troubleshooting Examples

of faults, and seek the solutions.
2 Types of Normal Faults
The type of faults is various. The normal faults can come down to six
types: leaks, block, open circuit, burnt, lock, scrape.
LeakMainly is leakage of R407C from cooling pipe system and
parts; leakage of condensation water from indoor units; electrical leakage
from electrical system and wires.
BlockMainly is block of the pipe system, block of capillary, block
of strainer or valve.
Open CircuitMainly is open circuit of electrical circuit, include:
fuse blowing out, connectors broke.
BurntMainly is burnout of fan motor, of compressor, of capacitor,
of transformer.
LockMainly is lock of compressor, four-way valve.
ScrapeMainly is scrape of indoor/outdoor fan and nearby parts,
and sound abnormally.
3 Examples
3.1 Leakage and seepage of indoor unit
Reason Check to be made Proposed remedy
Improper installation.
Indoor drain position is
lower than outdoor or
slanting installation of
indoor unit
Observe if the
condensation water drain
out, if the indoor unit is
declining
Level the indoor unit and
adjust the height
Water collecting plate is
blocked
Check if the plate is
blocked
Remove the matters block
the plate
Water collecting plate or
drain pipe is cracked
Check the location, ensure
if it is cracked
Replace the plate or pipe
Loosen wrap belt,
heat-preservation layer is
bad or layer behind indoor
units is bad
Connecting pipe bleed the
water, condensation water
exists behind the indoor
unit, the wall is wet and
turn colors
Rewrap the connecting
pipe, add new
heat-preservation layer
High ambient relative
humidity, low temp/speed
of air flow
Water is blow out from air
outlet, or water drips from
the outlet. Lower speed of
air flow
Suggest set the units to
dehumidifying mode at
high speed of air flow, to
lower relative humidity;
if the high speed is still
felt lower, the fan motor
must be checked
3.2 Poor cooling or heating effect