HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
429 / Inverter Flash 23
OD Inverter DC Link Low Voltage
This code typically points to
  • Inverter/compressor power issue
  • Wiring problem at U/V/W
Next checks to confirm
  1. Check U/V/W harness to compressor
  2. Check compressor winding resistance
Escalation
Service soon or service urgent depending on event history
Reset behavior
Auto clears when issue no longer exists.
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, pp.34-35
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