“System Sentinel”Troubleshooting Guide
Section 1... the “POWER” LED
NO
Is the“ON/OFF”Switch in the “ON”position?
YES
Is the“POWER”LED Illuminated? | YES |
NO | Turn switch to ON position. Is the | YES | Power is | ||
Power LED now illuminated? | being supplied to the heater, | ||||
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| the ON/OFF Switch is func- | |
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| tioning, and the 24V AC | |
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| Transformer is functioning. | |
NO
Is 120 VAC power present at the | NO | Check circuit breaker or fuse and field connec- |
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branch circuit connections to Black | tion of branch circuit wiring to leads of switch. | YES | ||
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| Repair or replace as required. Is “POWER” LED | |
wire of the switch and White wire of |
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the transformer ? |
| now illuminated? |
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YES |
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| Replace Switch, then verify that |
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Is 120 VAC power present between |
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the Black and White wires to the | NO | power is present. Is “POWER” LED | YES | ||||||
transformer ? |
| now illuminated? |
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YES |
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| Replace Transformer, then verify |
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Is 24 VAC power present between | NO |
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the Yellow and Gray wires from the |
| that power is present. Is “POWER” | YES | ||||||
transformer | ? |
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| LED now illuminated? |
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YES |
| NO |
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The System Senti- |
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nel Panel is defective and must be |
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replaced. |
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!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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