SMG4 Gauge can't set time zone

[Ripples]

HI!

I have new DF200AP's. Am configuring the gauges for the first time. Port engine SMG4 sets time zone correctly but STBD starts at 00:00 then after several presses jumps to 00:15 and eventually hits 01:00 before returning to 00:00. Gauge seems fine otherwise.

Any ideas as to what the problem is?

Thanks
Peter