Applicable Systems
RTAC 200
Symptoms
Communication fault. The controller cannot communicate with a connected device or module.
Possible Causes
- Communication cable damaged or disconnected
- Communication module hardware failure
Troubleshooting Steps
- Step 1: Check the communication cable and connections
Cable is secure and not damaged - Step 2: Verify the communication module status and addressing
Module is not responding
How to Reset
To reset: Fix the cable or module issue, then power-cycle the controller.
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Source: Trane HVAC Service Manual, Trane Inc.
Category: HVAC Residential
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