Kohler M340 — Calibrate Logic Board Normal Single-Phase Source
Adjustments · Logic board normal source voltage
For the Kohler M340, from the Kohler service manual.
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Before you start
- Never auto-zero the source unless it is zero volts.
Procedure
- Using the menu in Index 12, arrow down to N-AUTO-ZERO?. Press the YES key and the ENTER key.
- Observe the ENTRY ACCEPTED message on the LCD.
- When the LCD again reads N-AUTO-ZERO?, restore the normal power source.
- Press the MENU Arrow Down key so the LCD reads N-VOLT VAC. Value should be between 60% and 80% of system voltage.
- Measure normal system voltage at TB-AC1-NA to TB-AC1-NC. Enter the measured value at N-VOLT VAC; press ENTER.
- Press the RESET MENU key and then the ENTER key to store the set points.
Tools required
- voltmeter 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.