2.23 "H9" Outdoor Unit; H9" Outdoor Unit: Malfunction Of Thermistor (R1T) For Outdoor Air - Daikin RXYQ72 Serivce Manual

Troubleshooting by Indication on the Remote Controller

2.23 "H9" Outdoor Unit:

Outdoor Air
H9
Remote
Controller
Display
Applicable RXYQ72M, 96M
Models
Method of The abnormal detection is based on current detected by current sensor.
Malfunction
Detection
Malfunction When the outside air temperature sensor has short circuit or open circuit.
Decision
Conditions
Supposed
Causes
Troubleshooting
The alarm indicator is displayed when the fan only is being used also.
∗
150
Malfunction of Thermistor (R1T) for
Defect of thermistor (R1T) for outdoor air
Defect of outdoor unit PC board (A1P)
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Connector is
connected to X44A 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)
1
*
YES
1: Refer to thermistor resistance / temperature characteristics table on P239.
NO
NO
SiUS39-601
Connect the thermistor and turn
on again.
Replace the thermistor (R1T)
Replace outdoor unit PC board
(A1P).
Troubleshooting
(V3070)