Daikin AT12BV1LS Pocket Manual page 108

Si10-417
5.2.41 Radiation Fin Temperature Rise
Remote
Controller
Display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Trouble
shooting
Check No.6
Refer to
P.157
Check
No.7-1
Refer to
P.158
Check No.9
Refer to
P.160
Service Diagnosis
L4
A radiation fin temperature rise is detected by checking
the radiation fin thermistor with the compressor on.
If the radiation fin temperature with the compressor on is
above 81°C,
If a radiation fin temperature rise takes place 4 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
Be sure to turn off power switch before connect or
Caution disconnect connector, or parts damage may be occurred.
Turn off the power and turn it
on again to get the system
started.
Error displayed again?
NO
Check No. 9
Check the outdoor unit
fan or related.
Functioning
Radiation fin dirty?
Slightly dirty
Check No. 7-1
Check the installation condition.
Troubleshooting
YES
A
B
Malfunctioning
Replace the fan
motor.
Correct the
connectors and fan
motor leads.
Replace the outdoor
unit PCB.
Too dirty
Clean up the radiation
fin.
107