Operating instructions

35
Mechanical and electrical design
57
0308
Repair instructions
Limescale can block the hole in the valve
diaphragm and interfere with the function of the
valve.
It is therefore advisable to dismantle and clean the
valve at certain regular intervals. The frequency
depends on operating conditions and the level of
contamination in the water.
If the valve does not open
• Check that power is supplied to the coil.
• Check the coil with an instrument to determine
whether there is a break or a short circuit.
• Dismantle the valve (see below) and check the
openings in the valve diaphragm.
• Check the inlet strainer and clean as required.
• Undo the coil and clean the surfaces of the
magnetic core.
If the valve does not close
• Check that the coil is not live. The valve is
normally closed when the magnet is not
energised.
• Check the return spring.
• Check the diaphragm (pilot pressure opening).
Dismantling the valve.
• Pull the coil straight upwards. Use a
screwdriver if necessary to carefully undo the
coil.
• Use the tool supplied (attached to one of the
hoses when the machine is delivered) to open
the valve housing. Slide the tool over the
protruding plastic sleeve to that the pegs on the
tool engage the corresponding sockets in the
valve housing.
• Use a spanner or a pair of pliers and unscrew
the upper part of the valve housing.
Fig.
58
Fig.
57
Fig.
59
59
0310
58
0309