Daikin AT12BV1LS Pocket Manual page 100

Si10-417
5.2.37 Electrical Box 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
L3
An electrical box temperature rise is detected by
checking the radiation fin thermistor with the compressor
off.
With the compressor off, the radiation fin temperature is
above 122°C. (Reset is made when the temperature
drops below 113°C.)
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.
Error
again or outdoor unit fan
activated?
NO
Check No.
Check the outdoor unit
fan or related.
Functioning
Radiation fin dirty?
Slightly dirty
Check No. 7-1
Check the installation condition.
To cool down the electricals, the
outdoor unit fan gets started when
the radiation fin temperature rises
above 120˚C and stops itself
when it drops below 113˚C.
YES
9
Malfunctioning
Too dirty
Troubleshooting
WARNING
A
B
Replace the fan
motor.
Correct the
connectors and fan
motor leads.
Replace the outdoor
unit PCB.
Clean up the radiation
fin.
99