Honeywell SV2 Series User Manual page 187

Fault Fault
Category Description
Fuel/Air Control
Valve
Fuel/Air
FARMOD fuel
sensor is stuck
FARMOD
light-off not
commissioned
SV2 Series Safety Shut-off Valves
V2F, V2V
Detailed Description
Fuel/Air Control valve is
stuck. This means that gas
regulation does not work
correctly.
The Fuel/Air Ratio Module
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.
No values were recorded
for the Fuel/Air Ratio pre-
ignition air proving values.
This fault is ignored during
commissioning if the Record
Ign. Air Level box is checked
on the Ignition Setup screen.
SV2 SERIES SAFETY SHUT-OFF VALVES USER MANUAL
Remediation Steps
Remove power and shut-off gas supply.
1.) Remove valve front electrical enclosure
and inspect Motor connection for wire
engagement, seating, pin engagement
and cleanliness. Correct any errors.
Replace electrical enclosure.
2.) Verify ambient temperature meets
valve specifications.
3.) Restore power and gas supply. Reset
valve and burner management system,
monitoring for proper operation.
4.) If fault persists, replace valve and re-
commission.
5.) If fault persists, replace valve
electronics.
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.
1.) Commission the light-off sequence
by logging in as OEM or Installer. Record
new pre-ignition air proving values by
checking the Record Ign. Air Level box on
the Ignition Setup page once system is
stabilized.
2.) Reset valve and burner management
system.
187
Comments Fault
#
55
56
60