Kohler Series S340 — Main Circuit Board Voltage and Time Delay Adjustments

Adjustments

For the Kohler Series S340, from the Kohler service manual.

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Procedure

1. Normal source must be disconnected; use a variable AC power supply to establish voltage levels.
2. Remove capnuts from adjustment knobs.
3. Set the Drop-out knob maximum counterclockwise and the Pick-up knob maximum counterclockwise.
4. Increase line volts to the desired drop-out value (normally 70%); LED should be ON.
5. Rotate Drop-out clockwise until LED goes OFF.
6. Rotate Pick-up to maximum clockwise until LED is OFF.
7. Increase line volts to the desired pick-up value (normally 90%); LED is OFF.
8. Rotate Pick-up knob counterclockwise until LED comes ON.
9. Recheck pick-up and drop-out by running voltage up and down and checking by LED indication.
10. Reinstall cap nuts to secure settings. Time delays TDNE (0-60 sec) and TDEN (0-30 min) are adjusted by turning the potentiometer.

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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