The ENO-20 has a rechargable battery inside to backup memory. If you do not plug in the system for more than a year, the battery will drain and the ENO-20 will lose the program of the sequencer which decides when each component begins to work.  To reprogram, the upper unit cover needs to be open.  Then find the sequencer which is a gray colored box made by Keyence or Omron. Progam it as shown in attached file.

Please work on Sequencer Key pads;
1. Select Device Mode on the key of the sequencer. > Attached Manual 3.2.4 
2. Select Device Mode of the all listed numbers below and change to "0". 
　　DM0000,DM0001
　　DM0100,DM0101,DM0102
　　DM0110,DM0111,DM0112
　　DM0120,DM0121
　　DM0130,DM0131,DM0132
　　DM0140,DM0141,DM0142,DM0143
　　DM0150