Atlas Copco controller indicates E020 Service Due / Maintenance Alarm

Safety first: Perform maintenance with the generator stopped, isolated from mains, and with battery negative disconnected when working near rotating parts.

• Review service schedule: Consult the Atlas Copco maintenance manual for the specific standby generator model to determine required tasks at the current hour interval.
• Perform basic service:
  • Change engine oil and oil filter.
  • Replace fuel filters and air filter if due.
  • Inspect belts, hoses, and coolant level.
  • Check battery condition and charger operation.
• Record service: Log all work performed and parts replaced.
• Reset service timer: In the controller menu, navigate to maintenance or service settings and reset the service counter according to the manual.

Do not ignore service alarms; regular maintenance is critical for standby reliability.