In Amp L Start installation guide following is written and I quote
MAINTAINING light blinks every second Indicates that the unit is operating normally, but the house battery voltage isn't high enough to charge or maintain the starting battery. If this occurs when the unit should be operating, check for 1.disconnected shore power, 2.house battery charger unplugged or switched off, 3. heavily discharged house batteries
I checked all 3 and none apply in my case.My 100 Watt Solar panel working fine and generating energy and charging the house batteries and voltage showing on the Solar control panel is 13.6 volt which is above 13.2 volt required.My house batteries are 2 Trojan 6 volt each connected in series to make 12 voltage supply.Both are brand new.
So why chassis battery is not getting charge via Amp L Start.