H9" Outdoor Unit: Malfunction Of Thermistor (R1T) For Outdoor Air - Daikin CMSQ200A7W1B Service Manual

SiBE28-805
H9
3.22 " " Outdoor Unit: Malfunction of Thermistor (R1T) for
Outdoor Air
H9
Remote
Controller
Display
Applicable CMSQ200A7, 250A7
Models
Method of Malfunction is detected from the temperature detected by the outdoor air thermistor.
Malfunction
Detection
Malfunction When the outside air temperature thermistor has short circuit or open circuit.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗
Troubleshooting
Defect of thermistor (R1T) for outdoor air
Defect of outdoor unit PC board (A1P)
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Connector is
connected to X18A of
outdoor PC board
(A1P).
YES
Resistance
is normal when
measured after
disconnecting the thermistor
(R1T) from the outdoor
unit PC board.
(1.8kΩ to
800kΩ)
YES
Refer to "Thermistor Resistance / Temperature Characteristics" table on P.247.
Troubleshooting by Indication on the Remote Controller
NO
NO
Connect the connector and turn on
again.
Replace the thermistor (R1T)
Replace outdoor unit PC board
(A1P).
167