34 | 4 | 9109 | 2 |
Type | Edition | Page |
| Service |
34. Water inlet valve | Manual |
Repair instructions
Lime deposits can block the valve diaphragm hole and prevent the valve from functioning properly.
It is therefore a good idea to take apart and clean the valve regularly depending on operation conditions and the degree of polutants and lime content present in the water.
Valve does not open
•Check that there is voltage supply to the coil.
•Measure the voltage supply to the coil to check for a possible power failure or short circuit.
•Take apart the valve and check the valve diaphragm openings.
•Check the inlet filter and clean it when necessary.
•Remove the coil and clean the coil core surfaces.
Valve does not close
•Check that there is no voltage across the coil. Normally the valve is closed when the coil is not energized.
•Check the return spring.
•Check the diaphragm (pilot pressure opening).
Dismantling of the valve
Fig. 1. Carefully pry off the valve coil using a screw
3driver.
Fig. 2. Turn and lift the valve cover using a special tool
4and a wrench. (The special tool is attached to
one of the machine’s water hoses upon
Fig.
3
1187
4
Special tool
0906
5
5
delivery.)
