Specifications

Troubleshooting SiBE04-624
144 Service Diagnosis
Troubleshooting
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 gas 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.)
Set the temperature
properly.
Secure required space.
Arrange for a correct
combination.
Clean the air filter.
Replace with an
appropriate model or add
another machine.
Piping length is to be within
the specified range.
Replace thermistor.
Change power supply
installation.
Check detailed operating
conditions (diagnosis by
gas pressure, operation
current).
Is the set
temperature correct?
Is the supplied voltage
appropriate?
(R5998)
YES
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is there
required installation space?
(Isn't it short circuited?)
Thermostat off
Check the compatibility.
Is the
indoor unit compatible for
connecting with the outdoor
unit?
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Appropriate
NO
Is the air filter blocked?
YES
Is the load
(i.e. size of the room) appropriate for
the capacity?
Is the refrigerant piping
too long?
Too long
Check No. 2
Is the room temperature thermistor
or the outdoor temperature thermistor in
good working order?