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Page 120
Fault
Fault
Fault Description
SV2 Fault Codes (continued)
Category
Number
Main
68
K1 internal relay is stuck
Electronics
closed
Main
69
K2 internal relay is stuck
Electronics
closed
Main
90
POC Failure
Electronics
MV1
11
MV1 signal fault
MV2
12
MV2 signal fault
Phase
15
Incoming voltages out of
phase
POC
10
POC (proof of closure)
switch(es) signal fault
POC
74
POC output signal mis-
match
Fault
Fault
Fault Description
Category
Number
POC
75
POC (proof of closure)
fault for MV1
POC
76
POC (proof of closure)
fault for MV2
POC
77
POC (proof of closure) of
MV1 not verified
POC
78
POC (proof of closure) of
MV2 not verified
POC
80
POC 1 (proof of closure)
incorrect position
detected
Detailed Description
MV1 internal K1 relay is stuck closed unexpectedly
MV2 internal K2 relay is stuck closed unexpectedly
Proof of Closure output shorted to MV Input.
MV1 (Main Valve 1) terminal signal is not valid. Frequency or
duty is out of expected range.
MV2 (Main Valve 2) terminal signal is not valid. Frequency or
duty is out of expected range.
Valve incoming L1 VAC to POC or VPS or L1 VAC from
burner management system to valve ILK IN, MV1 / MV2 is
out of phase.
Valve POC (proof of closure) switch(es) signal is not valid.
Frequency or duty is out of expected range.
Valve POC (proof of closure) output terminal to burner
management control energized while internal POC relay is
not energized.
Or POC output terminal to burner management control not
energized while POC relay is energized.
Detailed Description
Possible internal fault, malfunction of relay or external
miswiring of valve.
Fault detected in POC 1 switch or its connection to valve
circuit board.
Possible internal fault in electronics interface to POC 1
switch.
Fault detected in POC 2 switch or its connection to valve
circuit board.
Possible internal fault in electronics interface to POC 2
switch.
Proof of closure verification procedure not completed.
Proof of closure verification procedure not completed.
POC 1 switch output does not match valve seat 1
powered/not powered status.
Could be due to swapped internal SOLENOID 1/SOLENOID
2 connections or swapped internal POC 1/POC 2
connections. Can occur if valve electronics orientation is
swapped in field or electronics is replaced in field.
May also be due to failures of POC switch, solenoid or
electronics.
LAARS Heating Systems
Remediation Steps
1.) Reset valve and attempt system restart.
2.) If fault persists, replace valve main electronics board. Perform Valve Production Cloning procedure
first, accessed via Setup & Tests menu.
1.) Reset valve and attempt system restart.
2.) If fault persists, replace valve main electronics board. Perform Valve Production Cloning procedure
first, accessed via Setup & Tests menu.
1.) Check for proper wiring between valve and burner controller. Verify the valve POC output terminal is
not shorted to an MV input terminal. Refer to the installation instructions, 32-00018.
2.) If problem persists, replace the valve main electronics board. Perform Valve Production Cloning
procedure first, accessed via Setup & Tests menu.
3.) Reset valve and burner management system, monitoring for proper operation
Remove power and shut-off gas supply as necessary.
1.) Remove valve front electrical enclosure and inspect MV1, L1 and N wiring connections for wire
engagement, seating, pin engagement and cleanliness.
2.) Ensure MV1 is wired to proper terminals on burner management system.
3.) Replace cover and restore power and gas. Reset valve and burner management system.
4.) If fault persists, repeat above steps for L1 and N connections on the burner management system.
5.) If fault persists, replace valve main electronics.
Remove power and shut-off gas supply as necessary.
1.) Remove valve front electrical enclosure and inspect MV2, L1 and N wiring connections for wire
engagement, seating, pin engagement and cleanliness.
2.) Ensure MV2 is wired to proper terminals on burner management system.
3.) Replace cover and restore power and gas. Reset valve and burner management system.
4.) If fault persists, repeat above steps for L1 and N connections on the burner management system.
5.) If fault persists, replace valve main electronics.
1.) Reset valve and burner management system, monitoring for proper operation.
2.) Check the valve power supply to make sure that both frequency and voltage meet the specifications.
3.) Verify that the valve, burner management system and associated devices are fed from the same
phase. If a VFD (variable frequency drive) is present, ensure that it does not share a common neutral or
ground.
Remove power and shut-off gas supply as necessary.
1.) Remove valve front electrical enclosure and inspect L1, Neutral, and POC wiring connection for
proper seating, pin engagement and cleanliness. Correct any errors.
2.) Check the valve power supply to make sure that both frequency and voltage meet the specifications.
3.) Replace cover and restore power and gas. Reset valve and burner management system, monitoring
for proper POC operation in conjunction with valve LEDs and burner management system inputs.
4.) If fault persists, replace valve main electronics.
Remove power and shut-off gas supply as necessary.
1.) Remove valve front electrical enclosure.
2.) Inspect external wiring between valve POC terminal and burner management system for proper
seating, pin engagement and cleanliness. Ensure the valve POC terminal is not externally powered.
Correct any errors.
3.) Replace cover and restore power and gas. Reset valve and burner management system, monitoring
Remediation Steps
for proper POC operation in conjunction with valve LEDs and burner management system inputs.
4.) If fault persists, replace valve main electronics.
Remove power and shut-off gas supply as necessary.
1.) Remove valve front electrical and rear solenoid enclosures.
2.) Inspect internal wiring between solenoid proof of closure switch 1 and valve electronics. The solenoid
number is indicated by the direction of flow arrow and number (1) in the valve casting. Ensure the
appropriate solenoid proof of closure connector is placed in the appropriate terminal (POC 1) on the valve
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electronics assembly and is properly seated and the wires are not loose.
3.) Replace cover and restore power and gas. Reset valve and burner management system, monitoring
for proper POC operation in conjunction with valve LEDs and burner management system inputs.
4.) If fault persists, replace valve main electronics.
5.) If fault persists, replace entire valve.
Remove power and shut-off gas supply as necessary.
1.) Remove valve front electrical and rear solenoid enclosures.
2.) Inspect internal wiring between solenoid proof of closure switch 2 and valve electronics. The solenoid
number is indicated by the direction of flow arrow and number (2) in the valve casting. Ensure the
appropriate solenoid proof of closure connector is placed in the appropriate terminal (POC 2) on the valve
electronics assembly and is properly seated and the wires are not loose.
3.) Replace cover and restore power and gas. Reset valve and burner management system, monitoring
for proper POC operation in conjunction with valve LEDs and burner management system inputs.
4.) If fault persists, replace valve main electronics.
5.) If fault persists, replace entire valve.
1.) Ensure the Proof of Closure setup/acceptance procedure has been performed. Go to the Setup &
Tests screen, select the Settings menu and the Proof of Closure tab. Follow the prompts and 'i' page
information.
2.) Perform the Safety Parameters Verification procedure. Go to Setup & Tests screen, press the button
labeled Verify Safety Parameters and follow the prompts. If this procedure is not completed while logged
in, the valve will lockout when the login times out and the valve will not be operational.
NOTE: The Proof of Closure setup/acceptance and Safety Parameters Verification procedures
validate the POC(s) exist and are properly wired to the valve electronics assembly. They also
validate proper procedure was followed if the valve electronics orientation was swapped or the
valve electronics assembly was replaced in the field.
1.) Ensure the Proof of Closure setup/acceptance procedure has been performed. Go to the Setup &
Tests screen, select the Settings menu and the Proof of Closure tab. Follow the prompts and 'i' page
information.
2.) Perform the Safety Parameters Verification procedure. Go to Setup & Tests screen, press the button
labeled Verify Safety Parameters and follow the prompts. If this procedure is not completed while logged
in, the valve will lockout when the login times out and the valve will not be operational.
NOTE: The Proof of Closure setup/acceptance and Safety Parameters Verification procedures
validate the POC(s) exist and are properly wired to the valve electronics assembly. They also
validate proper procedure was followed if the valve electronics orientation was swapped or the
valve electronics assembly was replaced in the field.
Remove power and shut-off gas supply as necessary.
1.) Remove valve front electrical and rear solenoid enclosures.
2.) Inspect internal wiring between solenoids and valve electronics. The solenoid number is indicated by
the direction of flow arrow and number (1) in the valve casting. Ensure the appropriate solenoid connector
is placed in the appropriate terminal (SOLENOID 1) on the valve electronics assembly.
3.) Inspect internal wiring between solenoid proof of closure switch(es) and valve electronics. The
solenoid number is indicated by the direction of flow arrow and number (1) in the valve casting. Ensure
the appropriate solenoid proof of closure connector is placed in the appropriate terminal (POC 1) on the
valve electronics assembly.
4.) Replace cover and restore power and gas. Reset valve and burner management system, monitoring
for proper POC operation in conjunction with valve LEDs and burner management system inputs.
5.) If fault persists, replace valve main electronics.
6.) If fault persists, replace entire valve.
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