Inverter Radiation Fin Temperature Rise Abnormality - Daikin VRV-WIII RWEYQ72PTJU Service Manual

Troubleshooting by Indication on the Remote Controller

3.29 Inverter Radiation Fin Temperature Rise Abnormality

L4
Error Code
Applicable RWEYQ72P, 84P
Models
Method of Error
Fin temperature is detected by the thermistor of the radiation fin.
Detection
Error Decision
When the temperature of the inverter radiation fin increases 188.6°F or more
Conditions
 Actuation of radiation fin thermal (Actuates 188.6°F or more)
Supposed
 Defective inverter PCB
Causes
 Defective radiation fin thermistor
Troubleshooting
200
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
The
radiation
fin of the
YES
inverter PCB
concerned exceeded a
temperature of
188.6˚F.
NO
Turn OFF the power
supply, and then make
measurement of
resistance of the
radiation fin thermistor.
Is the
thermistor
NO
resistance normal?
CHECK 11
YES
Connect and disconnect
the connector (∗1) for
the radiation fin
thermistor, and then
properly connect it.
Error
is displayed
again when the
YES
power supply turns ON
to start the
compressor?
NO
SiUS30-1301
Defective radiation from the
power unit
• Blocked air suction port
• Stained radiation fin
• High outdoor air temperature
Replace the thermistor.
Replace the inverter PCB.
Continue the operation.
 It is supposed 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 air
temperature
Service Diagnosis