then search for ways to solve the faults . The detailed procedures are: Look, Listen,
Touch, Measure, Analyze
Look: Observe air c onditionerís running. I.e., vibration; condensation on
evaporator; leakage; electrical and mechanical connection, etc.
Listen: Listen to kinds of sounds of th e runni ng air conditioner. Identify the
abnormal noise from the sounds.
Touch: Touch the key position and position faulty. Touch the temp of air flow
to decide the heating or cooling effect; as far to abnormal sound, be
sides adopt
ìlistenî, you should touch the frame, the pipe of the air
conditioner to feel the
vibration. Touch the easily heated parts, i.e. compressor, motor, touch them to feel the
temp.(Warning: High temp).
Measure: Measure the parameters of the air conditioner and relevant parts by
some instruments. Usually used instruments: amperemeter, voltmeter
multimeter
thermometer, etc, i.e., Use multimeter to test whether the ca pacitor is open, the
insulation of the wire and the parameters of other electrical parts; use the thermometer
to measure temp of airflow.
Analyze: Anal yze the above results, decide the reason and location of f aults,
and seek the solutions.
2 Types of Normal Faults
The type of faults is va rious. The normal faults can come do wn to six t ypes:
leaks, block, open circuit, burnt, lock, scrape.
Leak
Mainly is leakage of R410A from cooling pipe system and parts;
leakage of condensation water from indoor un its; electric al leakage from electric al
system and wires.
Block Mainly is block of the pipe system, block of capillary, block of strainer
or valve.
Open Circuit
Mainly is open ci rcuit of el ectrical circuit, include: fuse
blowing out, connectors broke.
Burnt
Mainly is bu rnout of fan motor , of compressor , of cap acitor, of
transformer.
Lock
Mainly is lock of compressor, four-way valve.
Scrape
Mainly is scrape of indoor/outdoor fan and nearb y 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 inst allation
of indoor unit
Observe if the conde nsation
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 o r
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 conne cting pipe,
add new heat-preservation
layer
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