Honeywell SV2 Series User Manual page 192

SV2 Series Safety Shut-off Valves
Fault Fault
Category Description
Burner load
minimum
threshold
New FARMOD
detected
Fuel/Air
S1 raw count
low
Detailed Description
During curve commissioning,
the S1 threshold is hard-
coded at 200. If S1 falls
below 200, this fault occurs,
but does not cause a lockout.
During normal run mode, the
S1 threshold is programmed
as X (or at least 25 counts)
below the S1 minimum
commissioned Installer
Correction Curve value.
X is programmed in the OEM
Setup parameters via the
S1 minimum threshold (%)
parameter. The default is
80%.
NOTE: During subsequent
start attempts, if the pre-
purge air level is outside the
commissioned window, the
valve will lockout on fault 42.
New Fuel/Air Ratio Module
detected, which has to be
accepted and programmed
before use.
During valve operation with
MV1 and MV2 opened, the
S1 value dropped below -100
raw counts for longer than 2
seconds.
A soft lockout was caused
and both valves were closed.
The fault will automatically
resolve when the s1 air value
is higher than -100.
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 Fuel/Air Module signal
connections for proper engagement.
4.) Reset valve and burner management
system.
5.) Recommission Fuel/Air curve.
6.) If fault persists, replace Fuel/Air
Module.
7.) Reset valve and burner management
system.
8.) Accept new Fuel/Air Ratio Module on
the FARMOD tab in the Setup & Tests
menu of user interface.
9.) Recommission partially or fully as
desired.
10.) Reset valve and burner management
system, monitoring for proper operation.
1.) Accept new Fuel/Air Ratio Module on
the FARMOD tab in the Setup & Tests
menu of user interface.
2.) Recommission partially or fully as
desired.
3.) Reset valve and burner management
system, monitoring for proper operation.
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 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.
192
Comments Fault
#
94
103
106
32-00029—02