Kohler — Circuit Board Replacement Procedure
Repair & overhaul · Controller interface board
From a Kohler service manual — check it applies to your exact model before use.
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Before you start
- Electrostatic discharge damage. Wear an approved grounding wrist strap when handling circuit boards.
- Never remove or install a circuit board with power connected.
Procedure
- Press the OFF button on the generator set controller.
- Disconnect utility power to the generator set.
- Disconnect the generator set engine starting battery, negative (-) lead first.
- Disconnect power to the transfer switch by opening switches or circuit breakers.
- Open the enclosure and check voltage at the source connections to verify power is off.
- Disconnect all connections to the circuit board.
- Note the orientation of the circuit board and pull the board off the four standoffs.
- Place the new circuit board on the standoffs in the same orientation and push until all four corners snap into place.
- Reconnect all connectors, replace the enclosure door, and reconnect power to the ATS.
- Reconnect the generator set engine starting battery, negative (-) lead last, and reconnect utility power.
- Press the AUTO button on the generator set controller and check transfer switch operation.
- Set the exerciser.
Tools required
- Approved grounding anti-static wrist strap 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.