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SM830078
Introduction:
Read Me First!
This manual will help you understand and service the air conditioner. To help you find the information you need,
we have divided it into 5 main sections. Each section is divided into chapters with charts, tables and explana-
tions to help you find and repair problems.
❑ Section 1: Specifications, tells you about the physical and electrical make up of the unit, as well
as its heating and cooling capacities. Look in this section to find the correct values for
components and functions.
❑ Section 2: Processes and Functions, explains each different part of the cooling and heating
cycle, and how each control function reacts to changing conditions to keep the room at the set
temperature range.
❑ Section 3: Electrical Data, which has fold-out schematic and wiring diagrams so you can find
the parts you need to check when something is wrong, and see how they should be connected.
❑ Section 4: Service Procedures, has two main parts, a
diagnostic
chapter to help you find the
specific component to replace or adjust, and a chapter with specific procedures and values to
guide you in checking the electrical components in the unit.
HOW TO USE THIS MANUAL
You can use this manual both as a
reference
to find specific information about the
capacity, functions and
construction of this unit, and as a source of information to help you set up and maintain the unit.
When this unit is not working properly, and the cause is not known, you can use the procedures in
Section 3: Servicing Procedures to find the problem, fix it, and restore the unit to its proper functioning.
This air conditioner has many helpful self diagnostic features to help you identify problem areas quickly.
So you will be ready when a problem happens, we suggest you look this manual over and become familiar with it
by following these steps:
1. Look at the TABLE OF CONTENTS to get an idea of what is in this manual and where to find it.
2. Look at the chapter about TROUBLE SHOOTING, so you are familiar with the way the flow
charts work. They are designed to guide you quickly through the possible causes for each kind of
problem that is likely to happen to the Unit. Particularly read the introduction to this section, and
the parts about the self-diagnosis and error codes which show on the display.
3. Look at the chapter about CHECKING ELECTRICAL COMPONENTS. You already know
about most of these procedures. This chapter gives you the specific values and methods for
these components. If you don’t know some of these procedures, you can easily learn them here.
4. Read the Instruction Manual! The Instruction Manual is included here because it helps you help
the user to set the temperature controls properly and know how to take care of any simple
problems that may happen, as well as know when to call for service. The Instruction Manual also
has illustrations, care, and installation information not found in the rest of the service manual. It is
short, and if you read it carefully, you will be able to answer the customers questions easily, and
also know the most efficient ways for setting times and temperatures.
Please use this manual to make your work easier, keep the air conditioner functioning well, and keep your
customers satisfied.