A quick Google switch yielded this:
To reset a Magnum remote switch, simply disconnect the remote communication cable from the inverter for about five seconds, then reconnect it; this effectively resets the remote connection and should resolve most issues with communication between the remote and the inverter.
Key points to remember:
- Check the cable:
Before assuming a problem with the remote itself, inspect the communication cable for any damage and replace if necessary.
- Consult the manual:
Always refer to your specific Magnum inverter manual for detailed instructions on resetting the remote switch, as procedures may vary slightly depending on the model.
Hope that helps.