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SV2 Series Safety Shut-off Valves
189
V2F, V2V
SV2 SERIES SAFETY SHUT-OFF VALVES USER MANUAL
Fault
Category
Fault
Description
Detailed Description
Remediation Steps
Comments Fault
#
Fuel/Air
FARMOD rough
target (S2a) not
reached
The Fuel/Air Ratio Module
redundant gas pressure
signal was not within the
control setpoint rough
window within the specified
time of 10 seconds.
This fault can occur
independently or in
combination with fault 35.
If this fault occurs directly after
commissioning:
1.) Recommission the 4 points of the
correction curve and/or add additional
points to the correction curve.
If the fault persists or if it occurs with
fault 35 (FARMOD rough target (S2a)
not reached), it is an indication the
modulation speed is too high.
1.) Check gas supply pressure to
appliance.
2.) Check Fuel/Air Module signal
connections for proper engagement.
3.) Reset valve and burner management
system.
4.) Check/lower appliance/burner
modulation speed (by decreasing fan
control P factor or limiting its RPM change
per time unit).
5.) If fault persists, replace Fuel/Air
Module.
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.
8.) Reset valve and burner management
system, monitoring for proper operation.
9.) If fault persists, replace valve and re-
commission.
Warning
indication
for SV2
Series
valve. This
condition
will likely
cause a
burner
controller
lockout.
70
FARMOD
EEPROM image
revision
Fuel/Air Ratio Module
EEPROM image revision
does not match valve
firmware.
1.) Replace Fuel/Air Ratio Module with a
correct version.
2.) Accept new Fuel/Air Ratio Module on
the FARMOD tab in the Setup & Tests
menu of user interface.
3.) Recommission partially or fully as
desired.
71
Motor
connection
Stepper motor is not
connected, or motor current
is outside its specified range.
1.) Check the stepper motor and valve
main electronics board connection.
2.) Reset the valve and the burner
management system, monitoring for
proper operation.
3.) If fault persists, replace valve main
electronics board. Perform Valve
Production Cloning procedure first,
accessed via Setup & Tests menu.
4.) If fault persists replace the valve and
re-commission.
72