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Service Manual VMH SerieS Heat Controller, Inc.
9.3.1.6 Open or short circuit of temperature sensor.
Check the connections
between temperature
sensor and PCB. Are
the connections good?
Correct the connections.
No
Yes
Yes
Replace indoor or outdoor PCB.
Replace the sensor and
check if the problem
happen again?
Check the resistance value
of the sensor via Appendix
1, is it normal?
No
9.3.1.7 Full-water malfunction (For Ceiling Cassette)
If the water-level switch
is inserted well?
No
Insert the water-level switch well
If the water-level switch
is broken?
Yes
Replace the water-level switch
If the water pump is
normal?
No
Replace the water pump
Yes
No
Yes
Check PCB board or replace the indoor main PCB
Correct the connections per
wiring diagram.
Replace the sensor
Re-insert the water-level switch well
Is
Is
Is