It is an electronic board of DUO, which has some specific functions, recorded in its EPPROM:
"Watchdog" function: protects the program against programming
electronics. Turns off the device and does not generate an alarm, but simply turn it back on.
Time guard: When the compressor is turned off, the board counts 3 minutes before
reconnect it. This is the time required for system pressures to equalize, avoiding
loads and increased compressor current.
Permanent memory: stores parameters for cases of power interruption;
