Daikin VRV RXYQ72-384XAYCA, Service Manual

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SiUS342004EB Troubleshooting by Error Code
Part 6 Service Diagnosis 296
Note(s)
Reference
Reference
Troubleshooting

1. Thermistors
CHECK 3 Refer to page 360.
CHECK 11 Refer to page 366.
NO
Is the
temperature
checked by the
Service Checker same as the
measurement of the
temperature?
NO
Replace the relevant thermistor.
Replace the outdoor unit main
PCB (A1P).
YES
YES
Connect the Service Checker.
Reset the system operation,
and then restart it.
CHECK 11
Are the
characteristics of the
discharge pipe and
compressor surface
temperature
thermistors
normal?
( 1)
• 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.
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 surface temperature
(or compressor surface temperature.)
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Applicable Thermistor Electric symbol Connector
Discharge pipe thermistor for M1C R21T
X19A
(Group connector)
Compressor body thermistor R14T