Carrier ClimateMaster ACDU03 Communicating Service Tool is used by technicians to electronically configure airflow, heat pump options and configuration, pump or modulating valve operation, unit family, unit size, etc. It can also be used in diagnosing the unit by operating it manually, performing control diagnostics, viewing dip switch configurations, or by viewing fault history and operating conditions when a fault occurred.
The ACDU03 is connected to the DXM2 board with a 4-Wire Connector.
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