The project was developed by Microchip Studio.
Automotive refrigeration controller program. For Eliwell ID974lx and IDPlus974.
ATMega32A. Screen with color symbols for operating modes. Three outputs. Two sensors. Works on sensors included.
Custom settings for desired temperature and differential. Power Loss Stateful Shutdown. Fully automatic operating mode of the unit (Cooling or heating). Automatic mode of purging the evaporator when the unit is cold. Automatic defrost mode of the evaporator when the unit is operating in cold weather. Manual defrost start. Hot gas defrost required! Automatic easy start of the compressor. Integrity monitoring of temperature sensors. Temperature sensor fault codes display. Compressor service interval with recycling hours, reminder and reset. Display in hours.
PORTA0 - output in speeker.
PORTA5 - input sensor 1. POTRA6 - input sensor 2.
PORTA2 - relay fan evaporator. PORTA3 - relay defrost output (switchable relay). PORTA4 - relay compressor output.
PORTB0 - input button DOWN. PORTB1 - input button UP. PORTB2 - input button FNC. PORTB3 - input button SET.
PORTB0 - output led segment (). PORTB1 - output led segment (). PORTB2 - output led segment (). PORTB3 - output led segment (). PORTB4 - output led segment (). PORTB5 - output led segment (). PORTB6 - output led segment (). PORTB7 - output led segment ().
PORTC2 - output led digit (0)? PORTC3 - output led digit (1)? PORTC4 - output led digit (2)? PORTC5 - output led digit (3)?