Thinkgood,
The spa is a Caldera Geneva and it comes with a subpanel, a Siemens I think. The GFCI breakers were already installed in the sub so all I installed was the line neutral to the buss and the load neutral to the 50 amp GFCI. The other GFCI breaker is a 20A 2 pole for the heater with no load neutral attached.
The instructions said nothing about which hole on the buss to put the line neutral, there are 5 holes. The instructions did however, indicate to keep L1 & L2 identified on both circuits by using different color wire and gave explicit instructions as to which terminals to land L1 & L2 of each circuit on at the spa terminal block, which made no sense either but I did it anyway just to CMA.
My feeling is the breaker got wet and that's why it wouldn't reset.
Brian