OMM-0153_E
• 5/11/2023 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 103 of 124
CENTURION Installation, Operation & Maintenance Manual
SECTION 10: TROUBLESHOOTING
Centurion Troubleshooting Procedures
Fault
Probable Causes
Corrective Action
IGN SWITCH
CLOSED
DURING PURGE
1.
Air/Fuel Valve not rotating.
1.
Start the unit. The Air/Fuel Valve should rotate to
the purge (open) position. If the valve does not
rotate at all or does not rotate fully open, check the
Air/Fuel Valve calibration. If calibration is okay, the
problem may be in the Air-Fuel Valve or the Edge
Controller. Refer to qualified service personnel.
2.
Defective or shorted switch.
2.
If the Air/Fuel Valve does rotate to purge, check the
ignition switch for continuity between the N.O. and
COM terminals. If the switch shows continuity when
not in contact with the cam replace the switch.
3.
Switch wired incorrectly.
3.
Check to ensure that the switch is wired correctly
(correct wire numbers on the normally open
terminals). If wired correctly, replace switch.
4.
Defective Power Supply
Board or fuse.
4.
Check DS1 & DS2 LEDs on Power Supply Board. If
not steady ON, replace Power Supply Board.
5.
Defective IGST Board.
5.
Check “Heartbeat” LED DS1 and verify it is blinking
ON & OFF every second. If not, replace IGST Board.
IGN SWITCH
OPEN DURING
IGNITION
1.
Air/Fuel Valve not rotating
to ignition position.
1.
Start the unit. The Air/Fuel Valve should rotate to
the purge (open) position, then back to ignition
position (towards closed) during the ignition cycle. If
the valve does not rotate back to the ignition
position, check the Air/Fuel Valve calibration. If
calibration is okay, the problem may be in the
Air/Fuel Valve or the Controller. Refer fault to
qualified service personnel.
2.
Defective Ignition switch.
2.
If the Air/Fuel Valve does rotate to the ignition
position, check the ignition position switch for
continuity between the N.O. and COM terminals
when in contact with the cam.
3.
Defective Power Supply
Board or fuse.
3.
Check DS1 & DS2 LEDs on Power Supply Board. If
not steady ON, replace Power Supply Board.
4.
Defective IGST Board.
4.
Check “Heartbeat” LED DS1 and verify it is blinking
ON & OFF every second. If not, replace IGST Board.
INTERLOCK
OPEN
1.
Interlock jumper not
installed or removed.
1.
Check for a jumper properly installed across the
interlock terminals in the I/O box.
2.
Energy Management System
does not have unit enabled.
2.
If there are two external wires on these terminals
check any Energy Management system to see if they
have the units disabled (a jumper may be
temporarily installed to see if the interlock circuit is
functioning).
3.
Device proving switch
hooked to interlocks is not
closed.
3.
Check that proving switch for any device hooked to
the interlock circuit is closing and that the device is
operational.
LINE VOLTAGE
OUT OF PHASE
1.
Line and Neutral switched in
AC Power Box.
1.
Check hot and neutral in AC Power Box to ensure
they are not reversed.
