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O
T
The
MNI
HERM
Fault
Fault
Fault Description
Category
Number
Fuel/Air
89
Control Valve Full Stroke
Mismatch
Fuel/Air
91
Fuel/Air Base Curve Min
not defined
Fuel/Air
92
Fuel/Air Base Curve Max
not defined
Fuel/Air
93
Fuel/Air Base Curve not
commissioned
Fuel/Air
94
Burner load minimum
threshold
Fuel/Air
103
New FARMOD detected
Fuel/Air
106
S1 raw count low
Fuel/Air
107
S1 raw count low
ILK
9
Valve Interlock Out (ILK
OUT) signal fault
Fault
Fault
Fault Description
Category
Number
ILK
13
Valve Interlock Out (ILK
OUT) signal mis-match
ILK
14
Valve Interlock In (ILK IN)
not energized
ILK
16
Valve Interlock Out (ILK
OUT) relay fault
Main
17
NA - not shown on HMI
Electronics
Main
36
Reset button fault
Electronics
Main
40
Solenoid internal VAC
Electronics
feedback
Main
46
Analog to digital test
Electronics
failure
Main
49
PRESSMOD or
Electronics
FARMOD power supply
fault
Detailed Description
The recorded full stroke of the control valve does not match
valve size.
Fuel/Air Ratio base curve minimum value has not been
defined. In installer mode this fault is ignored.
Fuel/Air Ratio base curve maximum value has not been
defined. In installer mode this fault is ignored.
Fuel/Air Ratio base curve initial amplification setting/value
has not been defined. Enter a value for the initial
amplification of the base curve and reset the valve in in OEM
commissioning mode.
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.
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.
Detailed Description
Valve Interlock Out (ILK OUT) terminal energized while
valve internal ILK relay is not energized. Possible internal
valve fault, stuck/welded relay or jumper present.
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.
NA - not shown on HMI
Reset button has been pressed too long or is stuck.
Solenoid 1 and/or solenoid 2 internal feedback VAC signal
shorted as sensed by valve main electronics.
The valve main electronics low voltage supply or AD (analog
to digital) converter has failed.
There is a power supply fault on the valve main electronics
assembly for the Pressure Module and/or Fuel/Air Ratio
Module.
Remediation Steps
Replace the valve and re-commission.
Commission or load the base fuel/air curve, ensuring the minimum firing rate is entered.
Commission or load the base fuel/air curve, ensuring the maximum firing rate is entered.
Commission or load the base fuel/air curve.
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.
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.
Remediation Steps
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.
1.) Measure ILK OUT voltage and verify it does not exist during lockout.
Page 7 of 13
2.) Reset valve and burner management system, observing valve / burner operation. Measure ILK IN and
ILK OUT voltages and verify proper values during a burner/valve run state.
3.) Remove power and shut-off gas supply as necessary.
4.) Verify no jumpers exist between L1 and valve ILK OUT terminals or ILK IN and ILK OUT terminals.
5.) Verify that ILK IN and ILK OUT are not reversed; check against wiring diagrams in valve installation
instructions, 32-00018.
5.) Replace cover and restore power and gas. Cycle valve and burner and monitor for proper operation in
conjunction with burner management system inputs as in step 2.).
6.) If fault persists, replace valve main electronics.
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.
Upon fault detection an immediate reset of electronics follows. If the fault goes away after the reset, it
would be most likely undetected.
Otherwise if it persists the electronics would continuously go through the reset. In that case replace the
main electronics.
1.) Attempt valve reset by depressing and holding button for 2 seconds.
2.) If fault persists, replace valve main electronics.
1.) Reset valve and burner management system.
2.) If fault persists, replace valve main electronics.
1.) Reset valve and burner management system.
2.) If fault persists, replace valve main electronics.
Remove power and shut-off gas supply.
1.) Remove valve front electrical enclosure and disconnect Pressure Module and Fuel/Air Ratio Module
connections, if present.
2.) Restore power.
3.) Reset valve and burner management system.
4.) If fault persists, replace valve main electronics.
5.) Reconnect Pressure Module (if present) to valve main electronics.
6.) If fault persists, replace Pressure Module.
7.) Reconnect Fuel/Air Ratio Module (if present) to valve main electronics.
8.) If fault persists, replace Fuel/Air Ratio Module.
9.) Accept new Fuel/Air Ratio Module on the FARMOD tab in the Setup & Tests menu of user interface.
10.). Recommission partially or fully as desired.
11.) Replace electrical enclosure cover, restore power and gas supply and reset valve and burner
management system.
Page 8 of 13
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