Richard.
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- Cambridgeshire
U-p is shown on mine every time for a couple of seconds after I power it downRecieved the board back today.
The board itself works (as I have power all around the machine now) however it shows U-P on the amperage display.
This would mean a primary over/undervoltage condition.
Any clues of how/where to measure.
I have 230v at the plug.
Could it be the large condensator needs charging time?
Dunno what it means I’ll have a look in the manual