[quote=colin28;188550] I'm getting L.E.D's HAP and H3P flashing together and not sure what it means.

HAP + H3P = Open phase detection

1/ Mains supply phase down (also check inverter 30A cartrige fuses)
2/ Mains voltage imbalance +/-20v
3/ K1M contactor faulty
4/ Incorrect power wiring (within unit)
5/ Inverter board
6/ Noise filter