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What is an E24-00 trouble code and how can I resolve this?

Answer:
An E24-00 trouble indicates a system "Service Message" exists.  This code is not actually a "trouble" condition but is a programmable message feature that is added using PCD-Windows Quickloader software.  Service Messages are typically used...

What is an E21-00 trouble code and how can I resolve this?

Answer:
An E21-00 trouble indicates the system has shut down.  The control panel has been shut down by the PCD-Windows Quickloader software.  To clarify the reason for the shut down, click Panel History, Status History in Quickloader and check the...

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