Fault Code Lookup

HVAC Sales Master
Inverter Normal State — Red LED ON / Green LED OFF
Normal inverter operation with no error code present
This code typically points to
  • No active inverter fault

Next checks to confirm
  1. If the outdoor unit is not operating normally despite this LED state, move to thermostat alert history and dealer diagnostics rather than treating the inverter LEDs themselves as faulted

Escalation
None; normal status
Reset behavior
Not a fault.
Informational
No action needed
Need deeper detail?
Retrieve the subcode for this platform:
  1. On thermostat: Menu > Settings > Advanced Settings > Dealer Control Center > Notifications
  2. Review active alarms on homeowner notification screen or in Dealer Control Center > Notifications
  3. For service-app access, press the smart hub commissioning button once
  4. Connect the mobile device to the smart hub when the LED begins blinking green
  5. Use the app as a service tool after system commissioning is already complete (S30 service session auto-logs out after 30 minutes)
Tool required: iComfort Mobile Setup application for service workflow
Source
Lennox Residential Communicating Systems Alert Code Guide 100017c, pp.35-41