Electrical Box Temperature Rise - Daikin J Series Service Manual

Troubleshooting

4.21 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
20/25/35 class
42 class
50 class
Supposed
Causes
111
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)
98
80
95
Defective outdoor fan motor
Short circuit
Defective radiation fin thermistor
Disconnection of connector
Defective outdoor unit PCB
B (°C) C (°C)
75 83
70 75
80 85
SiBE041101
Service Diagnosis