R21T (°C); R22T (°C); Compressor Body Temperature; R8T (°C) - Daikin RXYQ-TA Series Service Manual

Troubleshooting by Error Code
Troubleshooting
∗1. Thermistors
Note:
CHECK 11
229
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Connect the Service Checker.
Reset the system operation,
and then restart it.
CHECK 11
Are the characteristics
of the discharge pipe and
compressor body thermistors
normal? (∗1)
YES
Service Checker
Connect the Service Checker, and then make a
comparison between "discharge pipe temperature" (or
"compressor surface temperature" and "low pressure"
checked by the Service Checker and the
measurements of discharge pipe temperature (or
"compressor surface temperature.")
Is the
"temperature"
checked by the
Service Checker same as
the measurement of the
temperature?
YES
• All thermistors are normal, and temperature detection
with the outdoor unit main PCB is also normal.
• The discharge pipe temperature (or compressor surface
temperature) has really become high.
CHECK 3 : Eliminate the causes of superheat operation.
RXYQ72TA
Applicable
Electric
Thermistor
symbol Connector
Discharge pipe
R21T
(M1C) thermistor
Discharge pipe
—
(M2C) thermistor
Compressor body
—
thermistor
CHECK 3 Refer to page 293.
Refer to page 299.
NO
NO
RXYQ96/120TA
Electric
symbol Connector
X29A R21T
X29A
— — (Group
connector)
— R8T
Replace the relevant thermistor.
Replace the outdoor unit main
PCB (A1P).
RXYQ144/168TA
Electric
symbol Connector
R21T
X29A
R22T (Group
connector)
—
Service Diagnosis
SiUS341615E