Monthly
Check filters and replace if loaded. Verify thermostat readings against a reference. Listen for unusual fan or compressor noise.
Quarterly
Inspect coils and clean if dirty. Confirm drain pans and condensate lines are clear. Review controller alarms and trends for anomalies.
Annually
Commission the control sequence, verify setpoints, test safety interlocks, and review energy trends year over year. Check refrigerant charge and electrical connections.
A connected controller shortens this list: alarms arrive before failure, and trends show drift early. DNARENS devices push faults to your phone or BMS so maintenance is planned, not reactive.
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