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Troubleshooting
3.9
PACD011001C2
Indoor Unit: Malfunction of Thermistor (R2T) for Liquid Pipe
Remote Controller
Display
Supposed Causes
C4
„ Defect of thermistor (R2T) for liquid pipe
„ Defect of indoor unit PC board
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Connector
is connected to X12A
of the indoor unit
PC board.
NO
Connect the thermistor and turn on
again.
YES
Resistance
is normal when
measured after
disconnecting the thermistor
(R2T) from the indoor
unit PC board
(3.5kΩ~
360kΩ)
YES
NO
Replace the thermistor (R2T).
Replace the indoor unit PC board.
(VF036)
506
Troubleshooting UM Combination “MA1R Series” Using R-407C