Daikin R71FUV1 Service Manual page 280

Troubleshooting by Remote Controller
Remote Controller Display
L4
Applicable Models
CMSQ
Method of Error Detection
Fin temperature is detected by the thermistor of the
radiation fin.
Error Decision Conditions
When the temperature of the inverter radiation fin
increases above 93°C.
Supposed Causes
Actuation of fin thermal (Actuates above 93°C)
Defective inverter PCB
Defective radiation fin thermistor
Si20-701_B
273