Centurion Water Heater- Edge [ii]: Install-Operation-Service
SECTION 10: TROUBLESHOOTING
OMM-0153_A
• 8/25/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 105 of 131
Centurion Troubleshooting Procedures
Fault
Probable Causes
Corrective Action
DIRECT
DRIVE
SIGNAL
FAULT
1.
Direct drive signal is not
present:
•
Not yet installed.
•
Wrong polarity.
•
Signal defective at
source.
•
Broken or loose wiring.
1.
Check I/O Box to ensure signal is hooked up.
•
Hook up if not installed.
•
If installed, check polarity.
•
Measure signal level.
•
Check wiring continuity between source and
unit.
2.
Signal is not isolated
(floating).
2.
Check signal at source to ensure it is isolated.
3.
Edge Controller signal type
selection switches not set
for correct signal type
(voltage or current).
1.
Check DIP switch on
the Controller’s
Interface
board to ensure it is set correctly for the type
of signal being sent. Check control signal type
set in Advanced Setup
→
BST Cascade
→
Application Configuration screen.
FLAME LOSS
DURING IGN
1.
Worn Flame Detector.
1.
Remove and inspect the Flame Detector for signs of
wear. Replace if necessary.
2.
No spark from Spark Igniter.
2.
Close the internal gas valve in the unit. Install and
arc a spark igniter outside the unit.
3.
Defective Ignition
Transformer.
3.
If there is no spark, check for 120 VAC at the
primary side to the ignition transformer during the
ignition cycle.
4.
Defective Ignition/Stepper
(IGST) Board.
4.
If 120 VAC is not present, the IGST Board in the Edge
Controller may be defective. Refer fault to qualified
service personnel.
5.
Defective SSOV.
5.
While externally arcing the spark igniter, observe
the open/close indicator in the Safety Shut-Off Valve
to ensure it is opening. If the valve does not open,
check for 120 VAC at the valve input terminals. If
120 VAC isn
’
t present, the
Edge Controller’s
IGST
board may be defective. Refer fault to qualified
service personnel.
FLAME LOSS
DURING
RUN
1.
Worn Flame Detector or
cracked ceramic.
1.
Remove and inspect the Flame Detector for signs of
wear or cracked ceramic. Replace if necessary.
2.
Defective Regulator.
2.
Check gas pressure readings using a gauge or
manometer into and out of the Air/Fuel Valve to
ensure that the gas pressure into and out of the
valve is correct.
3.
Poor combustion calibration.
3.
Check combustion calibration using the procedures
in Section 5.4:
Combustion Calibration
of this
guide.
4.
Debris on burner.
4.
Remove the burner and inspect for any carbon
build-up or debris. Clean and reinstall.
5.
Blocked condensate drain.
5.
Remove blockage in condensate drain.
