Specifications

Check SiBE04-624_B
144 Service Diagnosis
3.15 Dehumidifying Solenoid Valve Check
Check No.23
The voltage is 0 V?
(R18378)
The voltage is
around 10 ~ 15 V?
Stop operation.
Check the voltage of [S43].
∗ pins 1 - 2
∗ pins 3 - 4
Check the voltage of [S43].
∗ pins 1 - 2
∗ pins 3 - 4
A voltage is applied. (both or either)
Out of 10~15 V (both or either)
NO
Wait 2 seconds after the
compressor on.
Start dehumidification test
operation.
Measure the resistance of the
dehumidifying solenoid valve
coils.
Disconnect the connecter [S43].
Within
the range of 10 ~ 60 Ω?
Dehumidifying solenoid valve
failure is suspected.
YES
Faulty criterion:
In dehumidification test operation mode, PCB is identified defective when the
dehumidifying solenoid valves do not turn on within 2 seconds after compressor start-up.
(When dehumidifying solenoid valves are not used, the operation mode is similar to
cooling operation.)
Replace the control PCB of
the indoor unit.
Replace the dehumidifying
solenoid valve coil.
Replace the indoor heat
exchanger. (Replacement of
the dehumidifying solenoid
valve only is impossible.)
Replace the control PCB of
the indoor unit.
0 V
(both)
10~15 V
(both)