Daikin FTXM-V Series, Service Manual

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SiUS042113E Troubleshooting
Part 6 Service Diagnosis 129
4.26 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)
09/12 class 77 171 38 100
18/24 class 82 180 77 171