Outdoor Unit: Malfunction Of Thermistor For Outdoor Air (R1T) - Daikin VRV R-407C PLUS Series Service Manual

SiE 00-07

3.19 Outdoor Unit: Malfunction of Thermistor for Outdoor Air (R1T)

H9
Remote Controller
Display
Supposed Causes
Troubleshooting
The alarm indicator is displayed when the fan only is being used also.
Troubleshooting R-407C PLUS Series
Defect of thermistor (R1T) for outdoor air
Defect of outdoor unit PC board (A1P)
Connector is
connected to X20A of outdoor
PC board (A1P).
YES
Resistance
is normal when
measured after
disconnecting the thermistor
(R1T) from the outdoor
unit PC board.
(3.5kΩ~
360kΩ)
YES
NO
NO
Troubleshooting
Connect the thermistor and turn on
again.
Replace the thermistor (R1T)
Replace outdoor unit PC board A1P.
(VF045)
141