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Kohler MPAC 1200 — SPD Replacement Procedure

Maintenance · Surge protection device (SPD)

For the Kohler MPAC 1200, from the Kohler service manual.

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Before you start

  • Hazardous voltage. Will cause severe injury or death. This equipment must be installed and serviced by qualified electrical personnel.

Procedure

  1. Disable the generator set: move master switch to OFF, disconnect battery charger power, remove battery negative lead first.
  2. Disconnect power to the transfer switch: open the normal and emergency source circuit breakers upstream.
  3. Remove the enclosure’s inner panel, if equipped.
  4. Open the fuse holder.
  5. Remove the cartridge by pulling straight out.
  6. Replace the SPD cartridge with the appropriate service part.
  7. Close the fuse holder.
  8. Replace the enclosure’s inner panel, if equipped.
  9. Reconnect power to the transfer switch by closing the normal and emergency source circuit breakers.
  10. Check the SPD status indicators.
  11. Reconnect the generator set engine starting battery, negative lead last.
  12. Reconnect power to the battery charger.
  13. Close and lock the ATS enclosure door.
  14. Move the generator set master switch to the AUTO position.

Specs & values

  • Cartridges are keyed for the phases or the neutral; obtain the correct service part for each cartridge

Source: Kohler 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.

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