When the compressor was restarted on Monday, the remote load button would 
not respond. The compressor was shut off. After two days of searching the 
wiring etc. a bad connection was found on DR1 relay (upstairs in the 
compressor control panel). The wire was the "compressor on" sensor. 
Connection was cleaned and retightened.
The compressor was started this morning and is working. 
I pressurized the cold box and started flow to the solenoid and through the 
power leads. I started a continuous flow throughthe LN2 adsorber. This will 
be run over the weekend. Cooling to start Monday morning.