Daikin FTKS20D3VMW, Service Manual, Page: 276 / 355

SiENBE12-713 Troubleshooting
Service Diagnosis 265
5.22 Electrical Box Temperature Rise
Remote Control
Display
L3
Outdoor Unit LED
Display A 5 1 4 2 4 3 1 4 4
Method of
Malfunction
Detection An electrical box temperature rise is detected by checking the radiation fin thermistor with the
compressor off.
Malfunction
Decision
Conditions
"
With the compressor off, the radiation fin temperature is above 100°C.
"
The error is cleared when the temperature drops below 70°C.
Supposed
Causes
"
Fin temperature rise due to defective outdoor unit fan
"
Fin temperature rise due to short-circuit
"
Fin thermistor defective
"
Connector in poor contact
"
Outdoor unit PCB defective