My Raypak 2100 has a problem. When my pool computer calls for heat, I hear the spark. At that time the screen goes blank and reboots. Next thing I know the revision 1.03 sign comes up and the process starts over. This only happens when there is demand for heat, otherwise the Raypak screen looks normal. Any ideas?

Pool & Spa - Raypak - 2100 Digital 406k Btu Natural Gas Pool Heater