H9" Outdoor Unit: Malfunction Of Thermistor (R1T) For Outdoor Air - Panasonic U-4..6ML5XPQ Service Manual

Troubleshooting by Indication on the Remote Controller
H9
3.26 " " Outdoor Unit:
Outdoor Air
H9
Remote
Controller
Display
Applicable U-4..6ML5DPQ, U-4..6ML5XPQ
Models
Method of Malfunction is detected from the temperature detected by the outdoor air thermistor.
Malfunction
Detection
Malfunction When the outside air temperature thermistor has short circuit or open circuit.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗
174
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 X11A of
outdoor PC board
(A1P).
YES
Resistance
is normal when
measured after
disconnecting the thermistor
(R1T) from the outdoor
unit PC board.
(3.5kΩ to
360kΩ)
YES
Refer to "Thermistor Resistance / Temperature Characteristics" table on P251.
NO
NO
Urban Multi ML5 · Mini UM · Heat Pump
Connect the connector and turn on
again.
Replace the thermistor (R1T).
Replace outdoor unit PC board
(A1P).
Troubleshooting
(V3070)