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Troubleshooting Guide
Issue
Possible Cause
Main Valve will not
Closed isolation valves in pilot system.
open
Insufficient supply pressure.
Main valve stem assembly corroded/
damaged
Blockage in pilot system.
Improperly configured opening speed
control.
Main Valve will not
Closed isolation valves in pilot system
close
Diaphragm is damaged
Main valve stem assembly corroded/
damaged.
Blockage in main valve.
Worn/damaged valve seat.
Improperly configured closing speed
control.
Solenoid will not
Possible Cause: Low or no voltage
actuate
Manual operated is engaged
6
IOM-A-ACV-984_684 2115
Corrective Action
Check isolation valves, ensure
open.
Check upstream pressure.
Inspect stem assembly, clean/
replace if necessary.
Inspect & clean any installed
pilot system strainers, check
orifice/speed controls for
blockages.
Adjust opening speed control
to verify functionality, adjust as
required.
Check isolation valves, ensure
open.
Conduct diaphragm seal test,
repair and replace if necessary.
Inspect stem assembly, clean/
replace if necessary.
Perform freedom of movement
test; if valve does not close,
disassemble and remove
blockage.
Perform seat sealing check;
disassemble and inspect/re-
pair seat if required.
Adjust closing speed control
to verify functionality, adjust as
required.
Check voltage at the solenoid
connection, insuring that it has
the minimum of 85% of the
coils rated voltage.
Turn manual operator counter-
clockwise to disengage
EDP# 1917098
Notes
Depending on water
source, supply pressure
may not be controlled by
valve operator.
Standard setting for open-
ing speed control is 1 1/2
- 2 1/2 turns open from full
closed position. Can be
adjusted in field.
Standard setting for
closing speed control is
11/2 - 21/2 turns open from
full closed position. Can
be adjusted in field.
Should be performed by
licensed electrician
© 2021 Watts
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