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Shirley Allen Posted on Jun 01, 2019
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Can Code 1902 for a Generac 8KW be fixed by the owner?

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CJ Rock

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  • Generac Master 4,429 Answers
  • Posted on Jun 02, 2019
CJ Rock
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If you have some fundamental electrical training/experience.

Undervoltage 1902
ALARM
Fault is displayed when both zero crosses are missing from the controller's input for 1.5 seconds or more. Could be a faulty excitation winding, zero cross circuit, loose wiring, or field boost hardware problem. Same applies here, v1.12 or later firmware should be installed.

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