Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 9 – TROUBLESHOOTING
OMM-0145_D • GF-218 • 11/2/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 157 of 213
TABLE 9-1: Boiler Troubleshooting Procedures
3. Defective Air/Fuel Valve
stepper motor.
3. Replace stepper motor.
4. Defective Power Supply Board
or fuse.
4. Check DS1 & DS2 LEDs on Power Supply
Board. If they are not steady ON, replace
Power Supply Board.
5. Check “Heartbeat” LED DS1 and verify it is
blinking ON & OFF every second. If not,
replace IGST Board.
6. Air/Fuel Valve out of
calibration
6. Perform the stepper motor calibration
procedure (Main Menu → Diagnostics →
Subsystems → Air Fuel Valve Stepper Motor).
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