“System Sentinel”Troubleshooting Guide
Section 2... the “THERMOSTAT” LED
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| Is the “THERMOSTAT” LED Illuminated? | ||||
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Ensure that power is being supplied to |
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the water heater. Refer to “Section 1...the |
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POWER LED”in thisTroubleshooting Guide, |
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and correct if necessary. Is the “THERMO- |
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STAT LED”now illuminated. |
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NO |
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Is Thermostat set at a tempera- |
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ture higher than the water tem- | NO |
| Thermostat to a higher setting. | |||
perature in tank? |
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| Is Thermostat LED now illumi- | ||||
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YES |
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| Ensure that power is being supplied to |
Is 24 VAC |
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| the water heater. Refer to “Section 1...the | ||||
power present | at Yellow Wire | NO |
| POWER LED”in thisTroubleshooting Guide, | ||
Terminal insideThermostat? |
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| and correct if necessary. Is the “THERMO- | |||
YES |
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| STAT LED”now illuminated. | |||
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Is 24 VAC power present at |
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Blue Wire Terminal inside Ther- | YES |
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mostat? |
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NO
Thermostat is
defective or out of calibration and must be replaced.
YES
Thermostat is calling for heat, and 24VAC power.
YES
!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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