Electrical Box Temperature Rise - Daikin SUPER MULTI NX G Series Service Manual

Troubleshooting

5.22 Electrical Box Temperature Rise

L3
Remote
Controller
Display
Outdoor Unit LED
A
Display
Method of
An electrical box temperature rise is detected by checking the radiation fin thermistor with the
Malfunction compressor off.
Detection
 With the compressor off, the radiation fin temperature is above
Malfunction
 The error is cleared when the temperature drops below
Decision
 To cool the electrical components, the outdoor fan starts when the radiation fin temperature
Conditions
18 class
24/32 class
 Defective outdoor unit fan
Supposed
 Short circuit
Causes
 Defective fin thermistor
 Disconnection of connector
 Defective outdoor unit PCB
135
1 2 3 4
rises above and stops when it drops below
80°C (176°F)
100°C (212°F)
.
.
70°C (158°F) 75°C (167°F)
70°C (158°F) 85°C (185°F)
SiUS12-928_A
.
Service Diagnosis