Ca" Indoor Unit: Malfunction Of Thermistor For Discharge Air - Daikin R-410A Service Manual

Troubleshooting by Indication on the Remote Controller
4.12 "CA" 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 PC board
Causes
Troubleshooting
∗ Refer to thermistor resistance / temperature characteristics table on P198.
124
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Connector is
NO
connected to the indoor
unit PC board.
YES
Resistance
is normal when
measured after
disconnecting the thermistor
from the indoor unit PC
board.
(7.2kΩ~
112kΩ)
YES
NO
SiBE39-402A
Connect the thermistor and turn
on again.
Replace the thermistor.
Replace the indoor unit PC board.
(V2786)
Troubleshooting