Innovation - Edge [i] Installation, Operation, Maintenance Manual
CHAPTER 7
– TROUBLESHOOTING GUIDE
OMM-0143_A
• GF
-216
•
9/6/2019
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•
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•
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TABLE 7-1. WATER HEATER TROUBLESHOOTING
FAULT INDICATION
PROBABLE CAUSES
CORRECTIVE ACTION
STEPPER MOTOR
FAILURE
1.
Air/Fuel Valve out of calibration.
1.
Perform Stepper Test per GF-112 (section 6.3.5) to ensure
stepper motor rotates properly from 0% (fully closed) to 100%
(fully open) positions. Verify VALVE POSITION bargraph and
dial on the Air/Fuel Valve track each other to indicate proper
operation. If operation is not correct, perform the Stepper
Feedback Calibration (GF-112, section 6.2.1).
2.
Air/Fuel Valve unplugged.
2.
Check that the Air/Fuel Valve is connected to the
Edge
Controller.
3.
Loose wiring connection to the
3.
Inspect for loose connections between the Air/Fuel Valve
4.
stepper motor.
4.
motor and the wiring harness.
5.
Defective Air/Fuel Valve stepper
motor.
5.
Replace stepper motor.
6.
Defective Power Supply Board or fuse.
6.
Check
DS1
&
DS2
LEDs on Power Supply Board. If they are not
steady ON, replace Power Supply Board.
7.
Defective IGST Board.
7.
Check “Heartbeat” LED
DS1
and verify it is blinking ON & OFF
every second. If not, replace IGST Board.
WARNING EXHAUST
TEMP HIGH
(Flashing WARNING)
1.
Poor combustion calibration.
1.
Check combustion calibration using procedures in Chapter 4.
2.
Heat exchanger has scale.
2.
Clean heat exchanger using procedures in Chapter 6.