H9" Outdoor Unit: Malfunction Of Thermistor For Outdoor Air (R1T) - Daikin VRV II RXYQ5MY1B Service Manual

Troubleshooting by Indication on the Remote Controller
2.23 "H9" Outdoor Unit: Malfunction of Thermistor for Outdoor
Air (R1T)
H9
Remote
Controller
Display
Applicable
RXYQ5~48M
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.
∗2: Refer to thermistor resistance / temperature characteristics table on P311.
200
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)
YES
NO
NO
SiE39-404
Connect the thermistor and turn
on again.
Replace the thermistor (R1T)
Replace outdoor unit PC board
A1P.
(V3070)
Troubleshooting