Honeywell SV2 Series User Manual page 193

Fault Fault
Category Description
Fuel/Air S1 raw count
low
ILK Valve Interlock
Out (ILK OUT)
signal fault
SV2 Series Safety Shut-off Valves
V2F, V2V
Detailed Description
During valve idle mode with
MV1 and MV2 closed, the S1
value dropped below -200
raw counts for longer than 6
seconds.
A soft lockout was caused
and both valves were closed.
The fault will automatically
resolve when the s1 air value
is higher than -200.
Valve ILK OUT terminal
signal is not valid. Frequency
or duty is out of expected
range.
SV2 SERIES SAFETY SHUT-OFF VALVES USER MANUAL
Remediation Steps
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 air signal tube for kinks or
blockages.
4.) Check Fuel/Air Ratio Module signal
connections for proper engagement.
5.) Reset valve and burner management
system.
6.) If fault persists, replace FARMOD.
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.
Remove power and shut-off gas supply as
necessary.
1.) Remove valve front electrical enclosure
and inspect ILK OUT and ILK IN wiring
connections for wire engagement, seating,
pin engagement and cleanliness.
2.) Replace cover and restore power and
gas. Reset valve and burner management
system, monitoring for proper operation
in conjunction with burner management
system inputs.
3.) Measure ILK voltage for proper
tolerance per valve nameplate and
documentation.
4.) If fault persists, repeat above steps for
L1 and N connections.
5.) If fault persists, replace valve main
electronics.
193
Comments Fault
#
107
9