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SiBE04-624_B
Troubleshooting
Check No.01
Refer to P.134
Warning:
When the air conditioner does not cool or heat the room, refrigerant leakage 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 is 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.)
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Is the set
NO
temperature
appropriate?
YES
NO
Is there required
installation space?
YES
NO
Is the indoor unit
compatible with the
outdoor unit?
YES
YES
Is the air filter clogged?
NO
NO
Is the load (i.e. size of
the room) appropriate
for the capacity?
YES
Too long
Is the refrigerant piping
too long?
Appropriate
Check No. 01
Is the room temperature
NO
thermistor or the outdoor
temperature thermistor in
good working order?
YES
Is the supplied voltage
appropriate?
YES
NO
Troubleshooting
Thermostat off is activated.
Set the appropriate
temperature.
Provide required space.
Match the compatible
models.
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).
(R18116)
79
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