Daikin VRV RXYMQ-A Series Service Manual page 213

SiME332106E
Troubleshooting
Reference
CHECK 3 Refer to page 273.
Reference
CHECK 11 Refer to page 281.
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the stop valve open?
YES
Connect the Service Checker.
Reset the system operation,
and then restart it.
CHECK 11
Are
the characteristics
of the discharge pipe
thermistor normal?
YES
Service Checker
Connect the Service Checker, and then compare the
discharge pipe temperature measured by the Service
Checker and the measurement of discharge pipe
surface temperature.
Is the
temperature
checked by the
Service Checker same as
the measurement of the
temperature?
YES
• Thermistor is normal, and temperature detection with
the outdoor unit main PCB is also normal.
• The discharge pipe temperature has really become
high.
CHECK 3 Eliminate the causes of superheat operation.
NO
NO
NO
Troubleshooting by Error Code
Open the stop valve.
Replace the discharge pipe
thermistor (R21T).
Replace the outdoor unit main
PCB (A1P).
207