I did read though similar older posts but no solution. New Multiplus II 12/3000/120. Worked for a few hours. Get temperature light and strong fan w/ no warmth in/around unit immediately after turning on, no load, ambient temp about 65F.
This happens when AC-in is the only connection. (AC OUT / DC disconnected). Also when DC to battery is the only connection. (AC IN / AC OUT disconnected). There is no external temp sensor.
Firmware updated. Assuming this is a faulty temp sensor in the unit, but if anyone has any ideas. We are on the road with a new system.
