Troubleshooting SiBE04-809
92 Service Diagnosis
4.14 Input Over Current Detection
Remote
Controller
Display
E8
Method of
Malfunction
Detection
An input over-current is detected by checking the input current value with the compressor
running.
Malfunction
Decision
Conditions
The following current with the compressor running continues for 2.5 seconds.
Cooling / Heating: Above 9.25A
Supposed
Causes
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
Troubleshooting
Check No.07
Refer to P.119
Check No.08
Refer to P.120
Caution
Be sure to turn off power switch before connect or 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.
(R8351)
NO
YES
YES
NO
Get restarted and measure the
input current.
Check No. 08
Check the discharge pressure.
Check No. 07
Check the installation condition.
Check with the inverter checker (∗).
Turn off the power and disconnect
the harnesses U, V and W.
Turn off the power, and reconnect
the harnesses. Turn on the power
again and get restarted.
Replace the outdoor unit
PCB.
Correct the power supply or
replace the PM1.
(Replace the outdoor unit
PCB.)
Any LED off?
Input current flowing
above its stop level?
∗ Inverter checker
Part No.: 1225477
To Next Page
Loading...
Need help?
General
