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Home›Repair guides›Generac›Shutting Down the Unit

Generac — Shutting Down the Unit

Operation · Genset

From a Generac owner's manual covering: MDG150, MDG175, MDG250. Check it applies to your exact model before use.

Applies to: Generac MDG150, Generac MDG175, Generac MDG250, John Deere 6068HFG05 / 6068HFG06 engine

Before you start

  • If unit does not shut down within 15 seconds, a stop fail alarm is displayed.

Procedure

  1. Remove all loads by opening all circuit breakers (OFF/O).
  2. Allow engine to run approximately five minutes to cool down.
  3. Press red engine STOP/RESET (O) button; 15 second shutdown timer starts.
  4. Wait two minutes after engine shutdown for controller actions to complete.
  5. Set control power switch to OFF (O).

Specs & values

  • Shutdown timer: 15 seconds
  • ECU runs 90 seconds after shutdown to purge the DEF

Full service-parts list: Generac MDG150 →, Generac MDG175 →, Generac MDG250 →, John Deere 6068HFG05 / 6068HFG06 engine →

Source: Generac owner's 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.

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