J9" Outdoor Unit: Malfunction Of Subcooling Heat Exchanger; Gas Pipe Thermistor (R5T) - Daikin CMSQ200A7W1B Service Manual

Troubleshooting by Indication on the Remote Controller
J9
3.27 " " Outdoor Unit: Malfunction of Subcooling Heat
Exchanger Gas Pipe Thermistor (R5T)
J9
Remote
Controller
Display
Applicable CMSQ200A7, 250A7
Models
Method of Malfunction is detected according to the temperature detected by subcooling heat exchanger
gas pipe thermistor.
Malfunction
Detection
Malfunction When the subcooling heat exchanger gas pipe thermistor is short circuited or open.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗
172
Faulty subcooling heat exchanger gas pipe thermistor (R5T)
Faulty outdoor unit PC board
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is
the connector
for subcooling heat
exchanger gas pipe
thermistor connected to
X30A on outdoor
unit PC board
(A1P)?
YES
Is the
resistance
measured after
removing the thermistor
(R5T) from outdoor unit PC
board normal?
(1.8kΩ to
800kΩ)
YES
Refer to "Thermistor Resistance / Temperature Characteristics" table on P.247.
NO
NO
SiBE28-805
Connect the connector and
operate unit again.
Replace thermistor (R5T).
Replace outdoor unit PC board
(A1P).
Troubleshooting