Kohler M340, M340+ Transfer Switch Controller, PM340 Power Monitor Remote Communications Monitoring and Control Software Operation(tp5823)

On a site where the power can’t go down—hospitals, data rooms, plants—this controller and power monitor keep the load fed when the utility drops and comes back. This manual shows you how to start up, operate, and shut down the M340 transfer switch controller and PM340 software in a way that protects the gear but still transfers quickly and cleanly. I’d have it open when a customer complains that the generator starts but the load never transfers, to verify operating modes, timing behavior, and what the indicators are really telling us before we start swapping parts.

Applications & Use Cases

• Set up proper automatic transfer and retransfer routines so the switch doesn’t chatter or slam loads.
• Verify normal/backup source sensing and make sure the controller isn’t misreading a marginal utility feed.
• Use the PM340 software to monitor events remotely, confirm alarms, and trace nuisance trips.
• Check correct manual operation procedures so you don’t defeat interlocks or stress the contactor.
• Fine‑tune operating habits to reduce wear on the switch while keeping runtime and response tight.

FAQ

Q: Can I keep a digital copy of this manual on a laptop or tablet in the field?

A: Yes, that’s usually the most convenient way; you can zoom diagrams, search terms, and keep it with other site documents.

Q: Is it worth printing parts of this manual for the switchgear room?

A: I’d print the key operating and indicator reference pages so operators can verify what the controller is doing without hunting through files.

Safety Note

Always follow lockout, arc‑flash, and live‑work rules when operating or testing the transfer switch and controller.

Kohler M340, M340+ Transfer Switch Controller, PM340 Power Monitor Remote Communications Monitoring and Control Software Operation(tp5823) Index:

SUBJECT PAGE SUBJECT PAGE
Safety Precautions and Instructions . . . . . . . . . I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
List of Related Manuals . . . . . . . . . . . . . . . . . . . . i
Service Assistance . . . . . . . . . . . . . . . . . . . . . . . . . i
Section 1. Specifications . . . . . . . . . . . . . . . . . 1-1
Purpose of Switch . . . . . . . . . . . . . . . . . . . . . . . 1-1
Components of Switch . . . . . . . . . . . . . . . . . . . 1-1
Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Interpreting a Transfer Switch Part Number . 1-3
Section 2. Installation . . . . . . . . . . . . . . . . . . . . 2-1
Upon Receipt of Unit . . . . . . . . . . . . . . . . . . . . . 2-1
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Mechanical Installation . . . . . . . . . . . . . . . . . . . 2-1
Lifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Power Connections . . . . . . . . . . . . . . . . . . . . . . 2-2
Start Generator Connections . . . . . . . . . . . . . . 2-2
Other Accessory Connections . . . . . . . . . . . . . 2-2
Section 3. Operation . . . . . . . . . . . . . . . . . . . . . 3-1
Switches and Indicators . . . . . . . . . . . . . . . . . . 3-1
Manual Operation . . . . . . . . . . . . . . . . . . . . . . . 3-1
Automatic Operation . . . . . . . . . . . . . . . . . . . . . 3-3
Sequence of Operation . . . . . . . . . . . . . . . . . . 3-3
Section 4. Accessories . . . . . . . . . . . . . . . . . . . 4-1
Section 5. Diagrams and Drawings . . . . . . . . 5-1
Appendix A. Glossary of Abbreviations . . A-1

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