Honeywell SV2 Series User Manual page 183

Fault Fault
Category Description
Fuel/Air FARMOD S1
pre-ignition air
level
SV2 Series Safety Shut-off Valves
V2F, V2V
Detailed Description
The S1 pre-ignition air
level is below or above the
Recorded Ign. Air Level by the
threshold values.
The S1 pre-ignition threshold
values are programmed as
X% below and Y% above the
Recorded Ign. Air Level on
the OEM Setup screen.
X%=S1 pre-ignition lower
threshold. Default=80%.
Y%=S1 pre-ignition upper
threshold. Default=120%.
This can be caused by a
change in ignition load,
change in ignition fan speed,
wind attack or blockage of
the appliance air supply.
SV2 SERIES SAFETY SHUT-OFF VALVES USER MANUAL
Remediation Steps
If ignition load has changed:
1.) Recommission light off sequence.
2.) If fault persists, perform steps below.
If ignition fan speed change is known/
suspected:
1.) Check that air duct is clear free of any
foreign bodies and pollution.
2.) Check that blower is running at a
proper rate.
3.) Check Fuel/Air Module signal
connections for proper engagement.
4.) Reset valve and burner management
system.
5.) If fault persists, recommission light off
sequence. Record new pre-ignition air
proving values by checking the Record
Ign. Air Level box on the Ignition Setup
page once system is stabilized.
6.) If fault persists, replace Fuel/Air Ratio
Module.
7.) Accept new Fuel/Air Ratio Module on
the FARMOD tab in the Setup & Tests
menu of user interface.
8.).Recommission partially or fully as
desired.
9.) If fault persists, replace valve and re-
commission.
183
Comments Fault
#
42