Troubleshooting PACD011001C2
516 Troubleshooting UM Combination “MA1R Series” Using R-407C
3.19 Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air
Remote Controller
Display
H9
Supposed Causes
„
Defect of thermistor (R1T) for outdoor air
„
Defect of outdoor unit PC board (A1P)
Troubleshooting
The alarm indicator is displayed when the fan only is being used also.
(VF045)
Resistance
is normal when
measured after
disconnecting the thermistor
(R1T) from the outdoor
unit PC board.
(3.5kΩ~
360kΩ)
Connector is
connected to X20A of outdoor
PC board (A1P).
Replace outdoor unit PC board A1P.
Connect the thermistor and turn on
again.
NO
NO
Replace the thermistor (R1T).
YES
YES
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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