HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
ERR159.04
Unit Bus fault / CDA COMM — Display Assembly communication error
This code typically points to
  • Wire harness between Display Assembly and distribution board
Next checks to confirm
  1. Check display-assembly communication harness
Escalation
Information
Reset behavior
Clears when bus communication restored.
Informational
No action needed
Source
Trane Hyperion *AM8/TAM8 Field Reference Data, p.22
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