HOW TO USE THIS MANUAL
Because not everyone is familiar with microprocessor based control systems, please take a
few minutes to read this page. It explains the content and structure of this manual. This
will make it easier for you to find the information you need.
• Section 1 - Safety information
This section contains the safety information for microprocessor control systems. Read this
material carefully before working on the unit.
• Section 2 - Hardware Description
This section includes the microprocessor control system hardware description. It identifies
and locates relays, LED’s, fuses and other components and provides connector maps for
all connectors.
• Section 3 - Software Description
This section discusses the operation of the microprocessor control system software and
programmable features. Each menu and feature is discussed individually to illustrate how
they are used.
• Section 4 - Operation
This section explains how to operate the microprocessor control system. This information
is referenced by material in Section 5 Diagnostics.
• Section 5 - Diagnostics
This section explains how to diagnose units equipped with microprocessor control systems.
It includes both Alarm Code Diagnostics and Other Symptom Diagnostics. This section will
reference material in Section 4 Operation and Section 6 Service Procedures.
• Section 6 - Service Procedures
This section includes Service Procedures to assist the technician when servicing units
equipped with microprocessor control systems. These procedures are referenced by the
diagnostic routines in Section 5 Diagnostics.
• Section 7 - Service Information
This section offers Service Information on the basic component parts of the
microprocessor control system. It includes a software revision history and a list of
applicable bulletins.
• Section 8 – Schematics and Wiring Diagrams
This section includes the microprocessor control system electrical schematics and unit
wiring diagrams.
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