Fault Code Lookup

HVAC Sales Master
12 red flashes
ID plug absent or not connected properly
This code typically points to
  • Loose ID plug
  • Loose plug wires
  • Missing model-identification plug

Next checks to confirm
  1. Reseat ID plug
  2. Verify plug/wire continuity
  3. Confirm correct plug for model

Escalation
Configuration error until plug is restored.
Reset behavior
Clears when plug is properly connected.
Service Soon
Schedule repair
Source
YP9C install manual