AUX ASW-H07B4/HSAR Service Manual page 155

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
Improper installation.
Indoor drain position is
lower than outdoor
slanting installation
indoor unit
Water collecting plate is
blocked
Water collecting plate or
drain pipe is cracked
Loosen wrap
heat-preservation layer is
bad or layer behind indoor
units is bad
High ambient
humidity, low temp/speed
of air flow
3.2 Poor cooling or heating effect
Reason
Check to be made
Observe
condensation water drain
or
out, if the indoor unit is
of
declining
Check if the plate is
blocked
Check the location, ensure
if it is cracked
Connecting pipe bleed the
belt,
water, condensation water
exists behind the indoor
unit, the wall is wet and
turn colors
Water is blow out from air
relative
outlet, or water drips from
the outlet. Lower speed of
air flow
Check to be made
if the
Level the indoor unit and
adjust the height
Remove the matters block
the plate
Replace the plate or pipe
Rewrap the connecting
pipe,
heat-preservation layer
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
Proposed remedy
add
Proposed remedy
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