HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
ERR171.00
Communication inactive fault / BLW COMM — blower communication not detected
This code typically points to
  • Faulty wiring harness
  • VS motor communication problem
Next checks to confirm
  1. Check blower communication
  2. Inspect harness
  3. Verify VS motor
Escalation
Critical
Reset behavior
Clears when blower communication restored.
Safety Critical
Immediate concern
Source
Trane Hyperion *AM8/TAM8 Field Reference Data, p.22
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