Daikin VRV III-S RXYMQ36 48PVJU Service Manual page 169

Troubleshooting by Indication on the Remote Controller
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged.
concerned exceeded a
Turn OFF the power supply, and then
make measurement of resistance of
the radiation fin thermistor.
Connect and disconnect the connector
(X111A) for the fin thermistor, and then
properly connect it.
recur when the power
supply turns ON to start
160
The radiation
fin of the main PCB
temperature of
181°F.
NO
Is the thermistor
resistance normal?
YES
Does
the malfunction
the compressor?
NO
YES
NO
YES
Faulty radiation from the power
unit
• Blocked air suction port
• Stained radiation fin
• High outdoor temperature
Replace the thermistor (Fin TH).
Replace the main PCB (A1P).
Continue operation.
It is probable that the
radiation fin temperature
became high due to some
field factors. In this
connection, check the
following points:
• Stained radiation fin
• Airflow obstructed with dirt
or foreign matters
• Damage to fan impellers
• Too high outdoor
temperature
Troubleshooting
SiUS34-907