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.
Inlet solenoid by-pass valve is open
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.
Outlet solenoid by-pass valve is open
Solenoid will not
Low or no voltage
actuate
Manual operated is engaged
6
IOM-A-ACV-933_633 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.
Close inlet solenoid by-pass
valve
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.
Close outlet solenoid by-pass
valve
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# 1917088
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