Troubleshooting PACD011001C2
508 Troubleshooting UM Combination “MA1R Series” Using R-407C
3.11 Indoor Unit: Malfunction of Thermistor (R1T) for Air Inlet
Remote Controller
Display
C9
Supposed Causes
„
Defect of indoor unit thermistor (R1T) for air inlet
„
Defect of indoor unit PC board
Troubleshooting
Replace the indoor unit PC board.
Connect the thermistor and turn on
again.
NO
NO
Replace the thermistor (R1T).
YES
YES
Connector
is connected to X13A of
the indoor unit PC
board.
Resistance
is normal when
measured after
disconnecting the thermistor
(R1T) from the indoor unit
PC board. (7.2kΩ~
112kΩ)
(VF038)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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