HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
UNIT LED (blue)
Flashes once every four seconds when communications are normal
This code typically points to
    Next checks to confirm
    1. If UNIT LED not blinking or blinking irregularly, check ABCD bus communication
    Escalation
    Irregular pattern = communication issue
    Reset behavior
    Reflects bus comm state.
    Informational
    No action needed
    Source
    Trane Hyperion *AM8/TAM8 Field Reference Data, p.22
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