Stations built with the Packard contactor only work from 208 to 240v (Level 2 only) as the coil is powered directly from the AC Input. 115v is just not enough to close the relay.
Stations built with the Struthers and Dunn relay work from 90 to 264v (Level 1 or Level 2) as the DC relay coil gets its power from the power supply.
I bought the same unit in 2016 and I just experienced the same issue leaving me in a bit of a jam. There was no mention of the lack of L1 support on the product description. This was one of the features that attracted me to this model in the first place as a flexible mobile unit. Is there anyway we can be offered a swap out relay so that we might be able to charge via L1 in a pinch?