I had a Diagnostic overload fault code, set message to BMPRO. I occasionally get the "open load" codes also, but everything seems to be working. Their reply was-
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Over load on channel one will generally mean an over current situation on slideout one, perhaps when the slide travelled all the way in or out and the current spiked. If you bump the slideout in or out, the overload message will likely go away.
To find out what each channel represents, contact Jayco customer service. Channel assignments vary on floorplan.
BMPRO Customer Service
customerservice@teambmpro.com
SETEC Pty Ltd
19 Henderson Road, Knoxfield 3180, Victoria
Direct: +61 3 9763 0962