H9" Outdoor Unit: Malfunction Of Thermistor (R1T) For Outdoor Air - Daikin FCQ18PVJU Service Manual

Troubleshooting by Indication on the Remote Controller
H9
3.22 " " Outdoor Unit: Malfunction of Thermistor (R1T) for
Outdoor Air
H9
Remote
Controller
Display
Applicable RZQ18~30PVJU
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 P.C.B. (A1P)
Causes
Troubleshooting
Refer to "Thermistor Resistance / Temperature Characteristics" table on P.166.
113
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts could be damaged.
Connector is
connected to X11A of
outdoor P.C.B.
(A1P).
YES
Resistance
is normal when
measured after
disconnecting the thermistor
(R1T) from the outdoor
unit P.C.B.
(3.5kΩ to
360kΩ)
YES
NO
NO
SiUS28-902_a
Connect the connector and turn
on again.
Replace the thermistor (R1T).
Replace the outdoor unit P.C.B.
(A1P).
Troubleshooting