VISUAL CHECK CHART 1
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Call for Heat. Thermostat Contacts Closed. |
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Does the Silicone Ignitor Warm Up and Glow Bright
Red after Prepurge Cycle Is Complete?
No - Go Right
Yes - Go Down
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Is 25 Volts Present Across Module Termals TH &
TR?
No - Go Right
Yes - Go Down
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Is 25 Volts Present Across the Secondary of the Transformer?
No - Go Right
Yes - Go Down
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Is 120 Volts Present Across the Primaryh of the Transformer?
No - Go Right
Yes - Go Down
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Replace Open Limits or Fuses in the 120 Volt Supply.
Energize the System and Check for Proper Operation. |
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Go to Chart 2 |
DISCONNECT ELECTRIC POWER TO THE SYSTEM AT THE
MAIN FUSE OR CIRCUIT BREAKER PANEL
Continue Down
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Replace Open 25 Volt Limits or Thermostat. Energize
the System and Check for Proper Operation. |
Replace 24 Volt Control Transformer. Energize the
System and Check for Proper Operation. |
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Unplug ignitor from wire harness and connect ohmmeter
across ignitor leads. Is resistance within the equipment manufacturers
specifications?
No - Go Right
Yes - Go Down
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Replace Ignitor. Connect Electric Power to System
at Main Fuse or Circuit Breaker Panel.
Go Right
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Energize System. Ignitor should Glow Red and Deenergize
after Trial for Ignition Period.
Yes - Go Right
No - Go Down
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System is functioning properly. |
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Connect Ohmmeter across IGN & L terminals of module.
Continue Down
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Replace Ignition Module. Energize System and Check
for Proper Operation. |
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Connect Electric Power to System at Main Fues or Circuit
Breaker Panel. Energize System.
Go Right
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Does Continuity Exist between IGN & L after Prepurge
Cycle?
No - Go Right
Yes - Go Down
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Replace Module. Energize System and Check for Proper
Operation. |
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Correct discontinuities in ignitor harness or connections.
Energize System and Check for Proper Operation. |
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