C9" Indoor Unit: Malfunction Of Thermistor (R1T) For Suction Air - Daikin FCQ18PVJU Service Manual

SiUS28-902_a
C9
3.11 " " Indoor Unit: Malfunction of Thermistor (R1T) for
Suction Air
C9
Remote
Controller
Display
Applicable AII indoor unit models
Models
Method of
Malfunction detection is carried out by temperature detected by suction air temperature
Malfunction thermistor.
Detection
Malfunction
When the suction air temperature thermistor becomes disconnected or shorted while the unit is
Decision running.
Conditions
 Defect of indoor unit thermistor (R1T) for air inlet
Supposed
 Defect of indoor unit P.C.B.
Causes
Troubleshooting
∗ Refer to thermistor resistance / temperature characteristics table on P.166.
Troubleshooting
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts could be damaged.
Connector
NO
is connected to X13A
of the indoor unit
YES
Resistance
is normal when
measured after
NO
disconnecting the thermistor
(R1T) from the indoor
unit P.C.B.
(7.2kΩ~
112kΩ)
YES
Troubleshooting by Indication on the Remote Controller
Connect the thermistor and turn
on again.
Replace the thermistor (R1T).
Replace the indoor unit P.C.B.
98