Generac GT-990 — To Select Automatic Operation
Operation · Transfer Switch / Generator
For the Generac GT-990, from the Generac service manual.
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Procedure
- Check transfer switch main contacts are at UTILITY position.
- Check utility voltage at transfer switch terminal lugs N1 and N2.
- Set generator AUTO-OFF-MANUAL switch to AUTO.
- Actuate generator main line circuit breaker to ON or CLOSED.
Source: Generac service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.