TECHNICAL SERVICE DEPARTMENT
Technical Service Bulletin
1-800-432-8373
AdvantagePlus Troubleshooting
When first diagnosing an AdvantagePlus, check the following:
•
If the unit is not operating, is the power on?
•
Is the unit gas valve turned on?
•
Is the unit thermostat temperature setting high enough to call for heat?
•
What is the temperature of the water in the tank?
•
Is there "LOC" in the LED panel window? (Press red reset button on front panel. Allow retrying for
ignition. Then diagnose based on the table below.)
LINE LED is off; does not have 120VAC
Explanation: This LED monitors incoming AC line voltage. The LED is ON when 120VAC line voltage is present
on the control board. If the wall plug is properly wired, you will see a green LED light on the bottom left hand
corner of the control board.
At a minimum, check the following:
1.
Plug in unit; check circuit breaker
2.
Polarity is correct or ground is missing on wall plug
3.
Re-seat CN1 Molex plug on control board
4.
Verify display ribbon cable is connected to main
board and display board
Is there 120VAC at the
black and white wires to
connector 1 (CN1)?
Yes
No
Verify power at wall plug or line connection
1.
Verify power connection in box on heater.
2.
Check and remove wall plug. Ensure the black lead is to
the brass screw; the white lead is to the silver screw; and
there is a ground wire present.
Continue to next step
