SOI/DT 2005-01 dmm
599 36 82-59
41/67
Mechanical jamming of solenoid valve
The solenoid valve may jam open without being actuated (which will cause flooding if the pressure switch
controlling the water level does not trip). If this occurs, the electronic control system (which continuously
monitors the flow sensor) will lock the door, start the drain pump and display an alarm.
Low water pressure
If the flow sensor does not generate a signal during water fill even though power is being applied to the
solenoid valve, the cause of this condition may be a closed water tap or clogged filter on the solenoid valve
(with consequent low water pressure). If this occurs, a warning will be displayed and the cycle will continue
for five minutes, after which time an alarm will be signalled.
The solenoid valve controlling residual condensed water operates during the drying phase on washer-dryers.
The alarm is deactivated because the amount of water fill is very small.
9.10 Drain pump
1. PCB
2. Anti-boiling pressure switch AE2
3. Anti-boiling pressure switch AE1
4. Drain pump
The PCB powers the drain pump via a triac as follows:
ª
for a pre-determined period.
ª
until the anti-boiling pressure switch closes on EMPTY, after which the pump is actioned for a brief
period or passes to the subsequent phase.
