[TenTec] Sick 580 Delta

[Sonny Eisenberg]

While checking my Delta 580 & 260 P.S.  setup before putting it for sale, seems the ALC control is not working..Turns smooth but has no effect...Everything else  operates normal .Transmits fine but of course have to watch the drive control or the power supply will shut down..Any one know what I should check or does this need a call to Tentec..
Tnx for any help,
Sonny W4KXQ