Honeywell SV2 Series User Manual page 195

Fault Fault
Category Description
ILK Valve Interlock
In (ILK IN) not
energized
Valve Interlock
Out (ILK OUT)
relay fault
SV2 Series Safety Shut-off Valves
V2F, V2V
Detailed Description
Valve Interlock In (ILK IN)
terminal not energized while
MV1 and MV2 are energized.
Possible improper burner
management timing/wiring,
jumper or internal valve fault.
Valve Interlock Out (ILK OUT)
safety relay internal drive
fault detected.
SV2 SERIES SAFETY SHUT-OFF VALVES USER MANUAL
Remediation Steps
WARNING
Explosion Hazard.
Can cause severe injury, death or
property damage
1.) Remove power and shut-off gas
supply
2) Remove valve front electrical enclosure
and
a.) Verify no jumpers exist between L1
and MV1 / MV2 and any wiring errors
that could provide power to MV1 / MV2
terminals. Correct any errors.
b.) Verify proper ILK IN and ILK OUT wire
routing from and to burner management
system; check against wiring diagrams in
valve installation instructions, 32-00018.
c.) Inspect wiring connections for wire
engagement, seating, pin engagement
and cleanliness.
d.) Check for voltage between L2 / neutral
and earth ground at the valve and at the
burner management system. Correct any
wiring errors providing a powered ground,
floating neutral or improper ground
reference.
3.) Replace cover and restore power (NOT
gas). Reset valve and burner management
system, monitoring for proper operation
in conjunction with burner management
system inputs.
4.) Verify valve ILK IN voltage exists when
a call for heat demand is present to burner
management system. Verify valve ILK OUT
voltage exists during a burner/valve run
state.
5.) If fault persists, replace burner
management system or contact
manufacturer for advice.
6.) If fault persists, replace valve main
electronics.
7.) When fault is corrected, restore gas
supply.
1.) Reset valve and burner management
system, observing valve / burner
operation.
2.) If fault persists, replace valve main
electronics.
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Comments Fault
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