Troubleshooting by Indication on the Remote Controller SiE39-404
200 Troubleshooting
2.23 “H9” Outdoor Unit: Malfunction of Thermistor for Outdoor
Air (R1T)
Remote
Controller
Display
H9
Applicable
Models
RXYQ5~48M
Method of
Malfunction
Detection
The abnormal detection is based on current detected by current sensor.
Malfunction
Decision
Conditions
When the outside air temperature sensor has short circuit or open circuit.
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.
∗2: Refer to thermistor resistance / temperature characteristics table on P311.
(V3070)
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Caution
Resistance
is normal when
measured after
disconnecting the thermistor
(R1T) from the outdoor
unit PC board.
(3.5kΩ~
360kΩ)
Connector is
connected to X44A of
outdoor PC board
(A1P).
Replace outdoor unit PC board
A1P.
Connect the thermistor and turn
on again.
Replace the thermistor (R1T)
NO
NO
YES
YES
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