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GENERATORCODES

Home / Generac / 1515

Evolution 1.0 / 2.0

1515

RPM sensor loss, single cylinder cranking

Engine · Alarm

Alarm 1515 is RPM sensor loss on a single-cylinder set while cranking. The table's causes are a starter-motor or engine problem, or loss of the ignition pulse.

Seen on: Air-cooled home standby generators with an Evolution 1.0 or 2.0 controller.

Likely causes

  • The engine is not turning, so the controller never sees RPM.
  • The ignition pulse is missing during crank.

Checks an owner can do

  1. Check battery connections with the generator off.
  2. Do not bypass the starter solenoid.

When to call a pro

Starter diagnosis and ignition tests are service-manual procedures.

Source

Generac Diagnostic Repair Manual 10000041488 (Evolution 1.0/2.0 air-cooled). E-code rows below match that manual's alarm table as published by Home Generators for Sale and the manual text extracted from document 10000041488.

Wording follows that document. Firmware can change a threshold. If this page and the manual shipped with your unit disagree, follow the manual.

What fixed mine

No approved reports for this code yet. Send one. It stays in the review queue until it is approved.

Related Generac codes

https://generatorcodes.com/brand/generac/1515