Radiation Fin Temperature Rise - Daikin B-Series Service Manual

Troubleshooting
5.21

Radiation Fin Temperature Rise

L4
Remote
Controller
Display
Outdoor Unit LED A
Display
Method of A radiation fin temperature rise is detected by checking the radiation fin temperature being
detected by the fin thermistor with the compressor on.
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
208
5 1 1 2 1 3 1 4
The radiation fin temperature with the compressor on is above
The error is cleared when the temperature drops below
~80 class 90
80·90 class 85
100 class 90
If a radiation fin temperature rise takes place 255 times successively, the system will be shut
down.
The error counter will reset itself if this or any other error does not occur during the following
60-minute compressor running time (total time).
Fin temperature rise due to defective outdoor unit fan
Fin temperature rise due to short-circuit
Fin thermistor defective
Connector in poor contact
Outdoor unit PCB defective
Silicon grease is not applied properly on the heat radiation fin after replacing outdoor unit
PCB
4
85
80
85
Si12-714
°C.
°C.
Service Diagnosis