Kohler MPAC 1500 — Engine Start Test Procedure
Testing & diagnosis · Engine start contacts
For the Kohler MPAC 1500, from the Kohler service manual.
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Before you start
- Accidental starting. Disconnect the battery cables before working on the generator set (negative lead first).
- Hazardous voltage. Only authorized personnel should open the enclosure.
Procedure
- Start with the transfer switch in the Source N position.
- Connect an ohmmeter or test lamp across the engine start contacts at J1 pins 8 and 9, or at the transfer switch contactor/terminal block, or at the generator set engine start leads.
- Disconnect Normal power from the transfer switch and verify that the engine start contacts close.
- Reconnect Normal power and verify that the engine start contacts open after applicable time delays.
- If the contacts do not operate, replace the ATS controller's power board.
- Press the Test button to initiate a test sequence and verify that the engine start contacts close.
- Press the End button to end the test; verify the engine start contacts open after the engine cooldown time delay.
- If the engine start contacts do not close during the Test Procedure, replace the ATS controller's logic board.
Tools required
- Ohmmeter or test lamp Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.