Honeywell HON 512 User And Maintenance Manual page 63

HON 512 with HON 650 pilot user manual
Malfunction Possible causes
The actuator assembly is Pilot: Not enough amplification
opening/closing too slowly
Pilot: The filter is dirty
Actuator assembly: The diaphragm
is defective
Actuator assembly: The sleeve is
getting jammed
Leaks on the outside The flange gaskets are damaged or
are not in place
Gas pressure regulator: The gaskets
are damaged or are not in place
Screws not tightened enough
The actuator assembly will Pilot: Faulty amplifying valve
not close
Pilot: Motorization pressure too
high
Actuator assembly: The compres-
sion spring is faulty
Actuator assembly: The valve
sleeve is jammed
Leaks on the inside of the Actuator assembly: The valve disc is
actuator assembly in the damaged
"closed" position
Actuator assembly: The sleeve's
sealing edge is damaged
All the reasons why the actuator
assembly is not closing
Sudden outlet pressure Pilot: Not enough amplification
drop
Malfunctions
Correction
Adjust the pilot as specified in
Maintaining the pilot (see page
102)
Clean the filter insert as specified in
the Maintaining the filter section in
Maintaining the pilot (see page
102)
Perform maintenance on the
actuator assembly as specified in
the Maintenance (see page 65)
section
Perform maintenance on the
actuator assembly as specified in
the Maintenance (see page 65)
section
Use new flange gaskets
Perform maintenance as specified
in the Maintenance (see page 65)
section
Check that all screws have the right
tightening torque as specified in the
tables in the Maintenance (see
page 65) section
Perform maintenance on the pilot
as specified in Maintaining the pilot
(see page 102)
Check the pilot spring to make sure
it is set correctly and is not dam-
aged as specified in Maintaining
the pilot (see page 102)
Adjust the control stage's setpoint
as specified in Adjusting the control
stage setpoint (see page 57)
Perform maintenance on the
actuator assembly as specified in
the Maintenance (see page 65)
section
Perform maintenance on the
actuator assembly as specified in
the Maintenance (see page 65)
section
Perform maintenance on the
actuator assembly as specified in
the Maintenance (see page 65)
section
Perform maintenance on the
actuator assembly as specified in
the Maintenance (see page 65)
section
See above
Perform maintenance on the pilot
as specified in Maintaining the pilot
(see page 102)
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