Kohler M340 — Calibrate The Logic Board Emergency Source Voltage
Adjustments
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
- Choose single-phase or three-phase emergency sensing in Menu Index 7 (three-phase requires option DD-05-K).
- Using the menu in Index 12, press YES at the E-AUTO-ZERO? message. Do not press ENTER yet.
- Disconnect the emergency power source; press the ENTER key.
- Observe the ENTRY ACCEPTED message on the LCD.
- When the LCD again reads E-AUTO-ZERO?, reconnect the emergency power source.
- Measure emergency voltage (E-VOLT VAC or E-PH A-B, B-C, A-C VAC) and enter the measured values; press ENTER.
- Press the RESET MENU key and then the ENTER key to store the setpoints.
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.