Electrical Box Temperature Rise - Daikin FTXN25KEV1B Service Manual

SiBE041102_A

4.19 Electrical Box Temperature Rise

L3
Remote
Controller
Display
Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the
Malfunction compressor off.
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Service Diagnosis
With the compressor off, the radiation fin temperature is above A °C.
The error is cleared when the radiation fin temperature drops below B °C.
To cool the electrical components, the outdoor fan starts when the radiation fin temperature
rises above C °C and stops when it drops below B °C.
A (°C) B (°C) C (°C)
99 76
Defective outdoor fan motor
Short circuit
Defective radiation fin thermistor
Disconnection of connector
Defective outdoor unit PCB
84
Troubleshooting
77