Service
Manual
9406
Repair instructions
Lime deposits can block the holes in the valve
membrane and interfere with correct operation.
It is therefore recommended that the valve be
dismantled and cleaned at regular intervals,
depending on operating conditions and the amount
of dirt in the water.
The valve does not open
•
Check that the coil is energised.
•
Measure the coil resistance to check for a short
circuit or open circuit.
•
Dismantle the valve and check the holes in the
membrane.
•
Check the inlet strainer and clean if necessary.
•
Remove the coil and clean the armature.
The valve does not close
•
Check that the coil is de-energised. The valve is
normally closed when the coil is de-energised.
•
Check the return spring.
•
Check the membrane (pilot pressure opening).
Dismantle the valve
1. Carefully prise off the coil using a screwdriver and
pull the coil off the stem of the valve.
2. Place the special tool over the stem, so that its
teeth engage with the corresponding teeth in the
upper part of the valve casing. (The tool is
supplied with the machine, secured to one of the
water hoses).
3. Use an adjustable spanner to turn the tool anti-
clockwise to unscrew the top of the valve.
Reassemble the valve in the reverse order.
34. Water inlet valve
34
0309
0310
0906
Special tool
2
