Electrical Box Temperature Rise - Daikin FTXS30LVJU Service Manual

SiUS091133

4.24 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
 With the compressor off, the radiation fin temperature is above A.
Malfunction
 The error is cleared when the radiation fin temperature drops below B.
Decision
 To cool the electrical components, the outdoor fan starts when the radiation fin temperature
Conditions
09/12 class
15/18 class
24/30/36 class
 Defective outdoor fan motor
Supposed
 Short circuit
Causes
 Defective radiation fin thermistor
 Disconnection of connector
 Defective outdoor unit PCB
Service Diagnosis
rises above C and stops when it drops below B.
98°C (208.4°F)
122°C (251.6°F) 64°C (147.2°F) 113°C (235.4°F)
100°C (212°F)
A B
75°C (167°F)
70°C (158°F)
Troubleshooting
C
83°C (181.4°F)
85°C (185°F)
136