Service manual

Troubleshooting SiENBE12-522A
236 Service Diagnosis
5.22 Radiation Fin Temperature Rise
Remote
Controller
Display
L4
Outdoor Unit LED
Display
A 5 1 1 2 1 3 1 4 4
Method of
Malfunction
Detection
A radiation fin temperature rise is detected by checking the radiation fin temperature being
detected by the fin thermistor with the compressor on.
Malfunction
Decision
Conditions
" The radiation fin temperature with the compressor on is above 90°C (above 85°C for 80 · 90
class).
" The error is cleared when the temperature drops below 85°C (below 80°C for 80 · 90 class).
" 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).
Supposed
Causes
" 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