SiUS091601EA
Troubleshooting for Outdoor Unit
Part 6 Service Diagnosis
176
7.14 Radiation Fin Temperature Rise
Error Code
L4
Method of Error
Detection
A radiation fin temperature rise is detected by checking the radiation fin thermistor with the
compressor on.
Error Decision
Conditions
If the radiation fin temperature with the compressor on is above
A
.
The error is cleared when the radiation fin temperature drops below
B
.
If the error repeats, the system is shut down.
Reset condition: Continuous run for about 60 minutes without any other error
Supposed
Causes
Defective outdoor fan motor
Short circuit
Defective radiation fin thermistor
Disconnection of connector
Defective outdoor unit PCB
Silicone grease not applied properly on the radiation fin after replacing the outdoor unit PCB
A
B
(°C)
(°F)
(°C)
(°F)
09 class
99
210.2
70
158
12 class
90
194
84
183.2
15 class
100
212
57
134.6
18/24 class
82
179.6
77
170.6
Summary of Contents for FDMQ12RVJU
Page 18: ...SiUS091601EA 13 Part 2 Specifications 1 Specifications 14 Part 2 Specifications ...
Page 198: ...Check SiUS091601EA 193 Part 6 Service Diagnosis 18 24 class R24538 1 2 3 4 Multimeter ...
Page 201: ...SiUS091601EA Check Part 6 Service Diagnosis 196 18 24 class R24539 DC DC W V U ...
Page 229: ...SiUS091601EA Piping Diagrams Part 8 Appendix 224 RXL15QMVJU RXL18UMVJU 3D100007 3D123368 ...
Page 230: ...Piping Diagrams SiUS091601EA 225 Part 8 Appendix RXL24UMVJU 3D107985A ...