Failure Solutions - Honeywell HON HSV086 Operation & Maintenance Manual

Failure
Switching device does
not or wrongly respond
at too low a pressure
Switching device does
not or wrongly respond
at too high a pressure
Switching device does
not respond without
the lower switch-on
pressure having been
reached
Valve cannot go up
Control and switch
mechanism cannot be
reset
After the valve has
dropped, the outlet
pressure increases
For HON HSVs equipped with accessories only
Switch in SVC086 and
K1 indication valve
position indicate valve
open. Indication valve
position on body cover
indicates valve closed.
Indication valve
position K1 and
indication on body
cover indicate valve
open, but valve
position indicator in
SVC086 indicates
valve closed
Operation and maintenance manual HON HSV086
6 Failures
Possible cause
Setpoint spring for under-
pressure incorrectly set
Handle H (figure 2) is not
horizontal at average value
of threshold value
Setpoint spring for over-
pressure has been set
incorrectly
Handle H (figuur 2) is not
horizontal at average value
of threshold value
Diaphragm in pressure
converter is fractured
Pressure upstream and
downstream of the valve is
not yet or not fully in
equilibrium
Handle H (figure 2) is not
horizontal, so that switch pin
M cannot be locked
Pressure converter seal is
leaking
Proximity switch in valve
position indicator does not
function properly.
Breaking of a cable
(Proximity) switch valve
position indicator in SVC086
does not function properly
Breaking of a cable
© 2017 Honeywell International Inc
Solution
Repeat adjustment and
check threshold value
Place handle H horizontally
Repeat adjustment and
check threshold value
Place handle H horizontally
Check diaphragm in
pressure converter and
replace, if necessary
Equilibrate pressure using
the by-pass line
Check that the pressure in
the pressure converter is
below the higher, resp.
above the lower threshold
value. If necessary, place
handle H horizontally.
Inspect seal and seat of the
valve and, if necessary,
replace seal or seat
Check locally whether valve
has dropped (check
indication position valve K1).
If necessary replace
proximity switch
Replace cable
Check locally whether valve
has dropped (check
indication position valve K1).
If necessary replace
proximity switch
Replace cable
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