HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
Online/Offline/Enabled/Disabled
Device state indicators in Summary Table — Online = communicating normally; Offline = not reporting; Enabled = system expects device on bus; Disabled = system ignores device
This code typically points to
    Next checks to confirm
    1. Enabled + Offline = typically triggers Err.126.00 Equipment Change Alert
    2. Disabled + Offline = normal (device intentionally not in use)
    3. Enabled + Online = normal operation
    Escalation
    Enabled+Offline combination triggers system alert
    Reset behavior
    State indicators update dynamically.
    Informational
    No action needed
    Deeper detail available
    The manufacturer has pushed full per-code troubleshooting trees into the Trane Technician app. Use the app for subcode detail beyond what's shown here.
    Source
    XL1050 18-HD80D1-6F-EN, XL850 18-HD73D1-9E-EN
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