C9" Indoor Unit: Malfunction Of Thermistor (R1T) For Suction Air - Daikin CMSQ200A7W1B Service Manual

SiBE28-805
C9
3.10 " " 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
thermistor.
Malfunction
Detection
Malfunction When the suction air temperature thermistor becomes disconnected or shorted while the unit is
running.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗
Troubleshooting
Defect of indoor unit thermistor (R1T) for air inlet
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.
Remove the thermistor from
the indoor unit PC board, and
then insert it again.
Is the
thermistor normal?
∗
NO
Remove the thermistor from
the indoor unit PC board, and
then make resistance
measurement of the thermistor
using a multiple meter.
5 kΩ to 90 kΩ
YES
Refer to "Thermistor Resistance / Temperature Characteristics" table on P.247.
Troubleshooting by Indication on the Remote Controller
YES
NO
Normal (The malfunction is
caused by faulty contact.)
Replace the thermistor (R1T).
Replace the indoor unit PC board.
149