Installer manual Siata V132 - SFE - Troubleshooting
74 / 88 Ref. MKT-IM-003 / B - 19.04.2017
10. Troubleshooting
Issue Cause Reset and recovery
Leaks to the drain
during service or
when in stand-by.
Leak from pilot.
A Twin pilot valve :
Before closing the inlet water
supply, disconnect the drain
rubber tube and check if there is a
leakage from that tube. In case
there is one, close inlet water
pressure and change the twin pilot
assembly.
B External distributor valve :
Before closing the inlet water
supply, disconnect the drain
plastic tube from the pilot
distributor system and check if
there is a leakage from the drain
port. In case there is one, one or
more pilots must be replaced.
A pilot circuit leakage can also cause
malfunctions of the valve because the
pressure can not be maintained in the
pressure chambers and hence the
piston of the valve can be badly
positioned. After solving the pilot
leakage problem, restore inlet water
supply and put the controller in service
position to check if leakage has
stopped. If the leakage remains,
contact your supplier for maintenance
on the valve.
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