“System Sentinel”Troubleshooting Guide
Section 5... the “ECO” LED
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ECO is “open”. | Allow tank to cool, |
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and reset. If ECO again trips, the |
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Thermostat/High limit is defective. |
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Replace as required. |
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Is“ECO LED now illuminated? |
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Is the Pilot Flame burning? |
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| The System Sentinel Panel is | |
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| defective and must be replaced. | |||
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YES
T h e
ECO (Energy 
not tripped (open) and power is being supplied to the “PV” termi-
nal on the Gas ControlValve.
Refer to
Section 3...the “IGNITION” LED; and Section 4...the “PILOT VALVE”LED of Troubleshoot- ing Guide. Repair or replace components as required.
Section 6... the “MAIN VALVE” LED
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| YES | ||
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| The Ignition Control Module is | ||
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| providing 24 VAC between the | ||
Is the Pilot Flame | burning? |
| YES | Is Main Burner on? |
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| YES | “MV” and “MV/PV” terminals on | |||||
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| Gas Control Valve, and Main Burn- | ||
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| NO |
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| er should be operating | ||
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| Is 24 VAC present between Blue wire on |
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Is the Spark Ignitor operating? |
| The System Sentinel Panel is | |||||||||||
“MV Terminal and White wire on “MV/PV” |
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| defective and must be replaced. | ||||||||||||
(Can sparking be heard?) | terminal on the Ignition Control Module? |
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| YES | Is the inlet gas pressure at or below the | |||||||
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| maximum as specified on the rating plate? | ||||||||
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| Is 24 VAC present between Blue |
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| YES | |||||
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| wire on “MV Terminal and White |
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| wire on “MV/PV” terminal on gas |
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| valve? |
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| Main GasValve is inoperative | ||||
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| and must be replaced. | ||
Ignition Control Module is inoperative and |
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| Check Continuity of Blue and White | ||||||||
must be replaced. |
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| wires between Ignition Control Module and | ||||
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| NO |
| Gas Control Valve. Repair or replace as | |||||
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| required to restore power to gas valve. | ||||
!CAUTION
Label all wires prior to disconnection when servicing controls.Wiring errors can cause improper and dangerous operation. VERIFY PROP-
ER OPERATION AFTER SERVICING!
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