Generac — Shutting Generator Down While Under Load
Operation · Generator and transfer switch
From a Generac service manual covering: RTSC400A3, RTSW300A3, RTSW400A3. Check it applies to your exact model before use.
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Before you start
- To avoid equipment damage, follow these steps, in order, when shutting the generator down during utility outages.
Procedure
- Turn the main utility disconnect off.
- Turn the generator MLCB (generator disconnect) to OFF (OPEN).
- Run the generator for approximately one minute for proper cooling.
- Turn the generator OFF.
- To turn back ON: put generator into AUTO, start and warm-up for a few minutes.
- Set the MLCB (generator disconnect) to ON (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.