Job Cards & Billing

Split AC Preventive Maintenance Checklist for Technicians

Published on 2026-03-25 · 6 min read · By ACServiceOS Team

Preventive maintenance is not just spraying water on the outdoor condenser. A thorough, professional service checklist extends compressor life by 4-5 years, cuts electricity bills by 20%, and prevents mid-summer breakdown emergencies.

Technician following preventive maintenance checklist on split AC indoor unit

Indoor Unit 7-Point Inspection Protocol

1. Clean air filters and electrostatic mesh. 2. Inspect evaporator cooling coil for fungal buildup. 3. Clean blower wheel and check balance. 4. Flush drain tray and pipe with anti-clog solution. 5. Check PCB wiring connections. 6. Test room temperature sensor resistance. 7. Verify swing motor and remote operation.

Outdoor Unit 5-Point Inspection Protocol

8. High-pressure jet wash condenser coils without bending aluminum fins. 9. Check fan motor bearings and blade alignment. 10. Inspect service valves for oil traces (sign of micro-leaks). 11. Test compressor running capacitor microfarads (MFD) using a multimeter. 12. Tighten electrical terminal screws.

Electrical & Operating Parameters Testing

13. Measure compressor running ampere under full cooling load using a clamp meter. 14. Check operating suction pressure (R32: 120-135 PSI; R410A: 120-130 PSI; R22: 60-70 PSI). 15. Verify earthing continuity to prevent chassis electrical shocks.

Saving Checklists on Digital Job Cards

When technicians log each checklist step on their ACServiceOS mobile sheet, service managers can audit service quality and customers receive undeniable proof of thorough maintenance.

Related Software Workflows

Official Indian Industry & Regulatory References