Ca" Indoor Unit: Malfunction Of Thermistor For Discharge Air - Daikin VRV III-S RXYMQ6PV4A Service Manual

Troubleshooting by Indication on the Remote Controller
3.12 "CA " Indoor Unit:
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
thermistor.
Malfunction
Detection
Malfunction When the discharge air temperature thermistor becomes disconnected or shorted while the unit
is running.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗
142
Malfunction of Thermistor for Discharge
Defect of indoor unit thermistor for air outlet
Defect of indoor unit PC board
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Connector
is 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
Refer to thermistor resistance / temperature characteristics table on P229.
NO
NO
SiME34-608
Connect the thermistor and turn
on again.
Replace the thermistor.
Replace the indoor unit PC board.
(V2786)
Troubleshooting