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SV2 Series Safety Shut-off Valves
177
V2F, V2V
SV2 SERIES SAFETY SHUT-OFF VALVES USER MANUAL
Fault
Category
Fault
Description
Detailed Description
Remediation Steps
Comments Fault
#
Fuel/Air
FARMOD
communication
fault
The bus communication
between the Fuel/Air
Ratio Module and the
valves electronics was/is
interrupted.
Remove power and shut-off gas supply.
1.) Remove valve front electrical enclosure
and inspect Fuel/Air module wiring
connections for wire engagement, seating,
pin engagement and cleanliness.
2.) Replace cover and reset valve and
burner management system when
corrected.
3.) Check for a nearby source of strong
electro-magnetic interference. Reset valve
and burner management system when
corrected.
4.) If fault persists, replace Fuel/Air
module.
5.) Reset valve and burner management
system.
6.) Accept new Fuel/Air Ratio Module on
the FARMOD tab in the Setup & Tests
menu of user interface.
7.).Recommission partially or fully as
desired.
25
Air flow sensor
(S1) frozen
The air flow sensor returns
a fixed value to the valve
electronics. During normal
operation the signal is
fluctuating. The missing
fluctuation of the signal
indicates a fault in the
sensor.
1.) Replace Fuel/Air Module.
2.) Reset valve and burner management
system.
3.) Accept new Fuel/Air Ratio Module on
the FARMOD tab in the Setup & Tests
menu of user interface.
4.). Recommission partially or fully as
desired.
26
FARMOD flow
sensor (S2a)
frozen
The Fuel/Air flow sensor
returns a fixed value to the
valve electronics. During
normal operation the signal
is fluctuating. The missing
fluctuation of the signal
indicates a fault in the
sensor.
1.) Replace Fuel/Air Module.
2.) Reset valve and burner management
system.
3.) Accept new Fuel/Air Ratio Module on
the FARMOD tab in the Setup & Tests
menu of user interface.
4.).Recommission partially or fully as
desired.
27