What do the Help display codes mean on the XMT 304?

The Help displays indicate specific faults: Help 1 indicates a malfunction in the primary power circuit, Help 2 and Help 4 indicate malfunctions in thermal protection circuitry (left and right sides respectively), Help 3 and Help 5 indicate overheating on the left and right sides, Help 6 indicates input voltage is too low, Help 7 indicates input voltage is too high, and Help 8 indicates a malfunction in the secondary power circuit. For Help 1, 2, 4, and 8, you should contact a Factory Authorized Service Agent. Help 3 and 5 will clear automatically once the unit cools down, and Help 6 and 7 will clear once voltage returns within 15% of the applicable input voltage. (Page 25)