Kohler — Operation Sequence Test
Testing & diagnosis · Automatic transfer switch operation
From a Kohler service manual — check it applies to your exact model before use.
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Before you start
- Hazardous voltage. Only authorized personnel should open the enclosure.
Procedure
- Press the OFF button on the generator set controller.
- Disconnect ALL power sources to the transfer switch.
- Manually operate the transfer switch to the normal position (do not manually operate with power connected).
- Close and secure the enclosure door and apply the normal power source; verify Utility Available LED.
- Press the AUTO button on the generator set controller.
- Disconnect the normal power source and wait for the engine start time delay (replace controller if engine not signalled within +/-10% of setting).
- Reconnect the emergency source and check Generator Power Available LED; wait for normal-to-emergency transfer time delay.
- Reconnect the normal power source and wait for the emergency-to-normal retransfer time delay.
- Wait for the engine cooldown time delay (replace controller if engine not signalled to stop within +/-10% of setting).
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Replace controller assembly if engine start, transfer, retransfer, or cooldown is not within +/-10% of the setting
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.