[C320-list] Autohelm ST4000+ Low Battery

[Darrell]

On two occasions recently, My Autohelm ST4000+ has displayed the text "low 
battery" though the unit seems to function just fine. I have scoured the 
manual and can find no mention of this feature. I assume that the unit has 
no internal battery and the message refers to the boat power supply (house 
bank) . However on both occasions we were motoring and the house bank was 
reading around 13 volts. Has anyone ever experienced this?
Darrell, #88