Malfunction Of Thermistor For Outdoor Air (R1T) - Daikin E-Series Service Manual

Troubleshooting for Outdoor Unit
7.9

Malfunction of Thermistor for Outdoor Air (R1T)

H9
Remote Control
Display
Applicable
AII outdoor unit models
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
" Defect of thermistor (R1T) for outdoor air
Supposed
" Defect of outdoor unit PCB (A1P)
Causes
Troubleshooting
∗ Refer to "Thermistor Resistance / Temperature Characteristics" table on P355.
318
Be sure to turn off power switch before connect or disconnect connector, or parts
damage may be occurred.
Caution
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.
(3.5kW to
360kW)
YES
NO
NO
SiENBE18-621
Connect the connector and turn
on again.
Replace the thermistor (R1T).
Replace outdoor unit PC board
(A1P).
Troubleshooting
(V3070)