Proline PFL1266W-E - Failure: Display Nothing; Failure: No Water Inletting

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Error message. Water level exceeds protective value.
Troubleshooting:
N
Check if water switch hose and air collector
are jammed
Clean water switch hose and air
collector
N
Pull out water switch inserts and turn on
power, then set wash mode. While water
is entering at the position of 1/4 glass
window, check the resistance between
and , is it 0? Check the resistance
between and , is it infinite?
Replace water pressure switch
Y
Y
Without starting but electrifying, measure the
import voltage of inlet valve, is it between
AC 220-240V?
Replace
PCB
Y
N
Replace inlet valve
Without power ,connect inlet pipe to inlet
vavle,then open the tap and observe if water
is entering in dispenser
Y
220-240V
Front Load Washing Machine
Model:
PFL1266W-E/F