Fault Code Lookup

HVAC Sales Master
Solid Red + Solid Green
Continuous Reset caused by a blown fuse or internal error
This code typically points to
  • Blown fuse
  • Internal error

Next checks to confirm
  1. Check 24V fuse and internal control

Escalation
Continuous reset condition
Reset behavior
Solid-red codes are not displayed during fault-code recovery replay.
Urgent
Fix now
Source
Trane 18-CD20D3-21 Installer's Guide, p.36