Ca" Indoor Unit: Malfunction Of Thermistor For Discharge Air - Daikin FCQ18PVJU Service Manual

Troubleshooting by Indication on the Remote Controller
CA
3.12 " " Indoor Unit: Malfunction of Thermistor for
Discharge Air
CA
Remote
Controller
Display
Applicable AII indoor unit models
Models
Method of
Malfunction detection is carried out by temperature detected by discharge air temperature
Malfunction thermistor.
Detection
Malfunction
When the discharge air temperature thermistor becomes disconnected or shorted while the unit
Decision is running.
Conditions
 Defect of indoor unit thermistor for air outlet
Supposed
 Defect of indoor unit P.C.B.
Causes
Troubleshooting
∗ Refer to thermistor resistance / temperature characteristics table on P.166.
99
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 the indoor
unit P.C.B.
YES
Resistance
is normal when
measured after
NO
disconnecting the thermistor
from the indoor unit
P.C.B.
(7.2kΩ~
112kΩ)
YES
SiUS28-902_a
Connect the thermistor and turn
on again.
Replace the thermistor.
Replace the indoor unit P.C.B.
Troubleshooting