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Troubleshooting
SiBE12-908
113
Service Diagnosis
Troubleshooting
Check No.02
Refer to P.169
Warning:
When an air conditioner does not cool or heat the room, refrigerant leak is considered to be one
of the reasons.
Make sure that there is no refrigerant leakage or breaks due to over tightened flare part.
(Though the refrigerant used in an air conditioner is itself harmless, but it can generate toxic
gases when it leaks into room and contacts flames, such as fan and other heaters, stoves, and
ranges. In case of leakage, ventilate the room immediately.)
(R9431)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is the set
temperature correct?
NO
YES
Set the temperature
properly.
Thermostat off
NO
YES
YES
NO
Is there required
installation space? (Isn't it
short circuited?)
Is the indoor unit
compatible for connecting
with the outdoor unit?
Check the compatibility.
Is the air filter blocked?
YES
NO
NO
Is the load (i.e. size of
the room) appropriate
for the capacity?
YES
Is the refrigerant piping
too long?
Appropriate
Is the room temperature
thermistor or the outdoor
temperature thermistor in
good working order?
Check No. 02
YES
Is the supplied voltage
appropriate?
YES
Too long
NO
NO
Secure required space.
Arrange for a correct
combination.
Clean the air filter.
Replace with an
appropriate model or add
another unit.
Piping length is to be within
the specified range.
Replace the thermistor.
Change power supply
installation.
Check detailed operating
conditions (diagnosis by
gas pressure, operation
current).