- 176 -
2
Solenoid valve (SVA, SVB, SVC)
Measure the piping temperature
of the front and the rear of the
solenoid valve, and compare the
temperatures.
There is no temperature
difference. : OK
There is a temperature
difference. : NO
Measure the piping temperature of the
front and the rear of the solenoid valve
When the solenoid valve is ON:
There is no temperature difference.
When the solenoid valve is OFF:
There is a temperature difference.
Check the relay output with
the self-diagnosis monitor
LED, and check whether
the operation corresponds
with the operation mode.
No fault.
There is a
suction force.
There is a
suction force.
OK
Corresponds
OK
Faulty judgment of solenoid valve
Faulty judgment of solenoid valve
Faulty solenoid valve body
Fix the fault.
Replace the
control board.
Replace the
control board.
Replace the
solenoid
valve coil.
Stop the
operation.
Stop the
operation.
Stop the operation of the applied BC remote controller system.
(Use the remote controller to turn off.)
Stop the unit with the
remote controller.
Remove the solenoid
valve connector, and
check that the electricity
runs through the
solenoid valve coil.
Turn on the remote
controller with the
connector of the applied
solenoid valve is dis-
connected, and check
that the control board
outputs 220~240V.
Check whether the wire to the solenoid valve is not
connected wrongly, or the connector is not loose.
Run the cooling or heating operation of the
refrigerant system of the applied solenoid valve.
Check the operation sound of the solenoid valve, which must be
magnetized at the time of turning on the remote controller.
NO
NO
NO
Remove the solenoid valve coil,
and check that there is a suction force.
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
Note2
Note2
Note2
Note1
Makes a tick sound.
Makes a tick sound.
The electricity runs.
The electricity runs.
Output 220~240V.
