The Elektronikon Atlas Copco 1900 0598 02 is a master control module that manages compressor pressure, cycle timing, and safety interlocks for stationary air‑compressor units. Common failure points include the power supply ICs, the high‑current driver transistors for the motor relay, and the EEPROM/flash memory that stores calibration data; these components often exhibit burn marks or intermittent shorts after prolonged operation. First‑check diagnostics: verify 24 V DC input voltage and polarity at the module’s power connector; inspect for blown fuses or damaged capacitors on the board; and review any diagnostic LEDs or error codes displayed on the compressor control panel before proceeding with component testing or replacement.[oss-gpt-20b]