Daikin AT12BV1LS Pocket Manual page 51

Troubleshooting
5.2.12 Input Over Current Detection
Remote
Controller
Display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Trouble
shooting
Check
No.7-1
Refer to
P.158
Check No.8
Refer to
P.160
50
E8
An input over-current is detected by checking the input
current value being detected by CT with the compressor
running.
The following CT input with the compressor running
continues for 2.5 seconds.
Cooling: Above 11A, Heating: Above 13A
Over-current due to compressor failure
Over-current due to defective power transistor
Over-current due to defective outdoor unit PCB
Error detection due to outdoor unit PCB
Over-current due to short-circuit
Be sure to turn off power switch before connect or
Caution disconnect connector, or parts damage may be occurred.
∗ An input over-current may result from wrong internal wiring. If the
wires have been disconnected and reconnected for part
replacement, for example, and the system is interrupted by an input
over-current, take the following procedure.
Get restarted and measure
the input current.
Input
current flowing above
its stop level?
YES
Turn off the power and
disconnect the harnesses U, V
and W.
Check with the inverter
checker (∗).
Any LED off?
NO
A
NO
Replace the outdoor
unit PCB.
∗ Inverter checker
Part No.: 1225477
YES
Correct the power
supply or replace the
SPM.
(Replace the outdoor
unit PCB.)
Service Diagnosis
Si10-417