HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
435 / Inverter Flash 60 — Red LED 6 flashes / Green LED OFF
OD Inverter EEPROM Checksum Fault
This code typically points to
  • Inverter internal error
Next checks to confirm
  1. Follow outdoor-unit service documentation for inverter internal fault diagnosis
Escalation
Outdoor control cycles power to the inverter by opening the contactor for 2 minutes as service-soon behavior; it will cycle power three times and then lock out the outdoor unit as service urgent
Reset behavior
To clear alert code, disconnect power to the outdoor unit and restart.
Urgent
Fix now
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, p.40
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