HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
ERR159.03
Unit Bus fault / EVC COMM
This code typically points to
  • Wire harness between EVC and distribution board
  • EVC communication error
Next checks to confirm
  1. Inspect harness between EVC and distribution board
  2. Verify EVC communications
Escalation
User Display
Reset behavior
Clears when EVC communication restored.
Service Soon
Schedule repair
Source
Trane Hyperion *AM8/TAM8 Field Reference Data, p.22
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