Power Inverter/ Battery Charger; MultiPlus 12/3000/120-50 120V FLASHING LEDs/Codes?

My setup is 2 Power Inverter/ Battery Charger; MultiPlus 12/3000/120-50 120V units SPLIT PHASED to produce 240VAC output.
PROBLEM: Each unit is supplied 120VAC (AC1 Input for Charger Operation) when switched to ÇHARGER ONLY mode the following LEDs Flashing Simultaneously:
Master Unit, the MAINS & FLOAT … In the slave unit, only the MAINS LED flashes.

WHAT DOES THIS FLASHING LED COMBINATION MEAN??? ALSO, WHERE IS AN ALL INCLUSIVE LIST OF ERROR CODES EXIST? (the Victron Toolkit App only has a few flashing error codes listed)…PLS ADVISE, TY