HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
431 / Inverter Flash 27
OD Inverter PFC Fault
This code typically points to
  • PFC circuit over-current; guide states 100A peak event threshold
Next checks to confirm
  1. Refer to detailed outdoor unit service procedure
  2. Reset power after correction
Escalation
Outdoor unit stops; anti-short-cycle starts; if repeated 10 times in 60 consecutive minutes, system locks out to service urgent
Reset behavior
Disconnect power to 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
Residential Communicating Systems Alert Code Guide, p.35
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