Specifications
00218012 Revision B (KAK) 7 August, 2000
2
Multiplex Company, Inc.
Fountain Troubleshooting Guide
Foreword
This Troubleshooting Guide has been developed to assist you in determining what the Probable Cause
for any particular Problem you may experience with your Multiplex Beverage System could be. It then
advises of the proper Corrective Action to be taken to remedy that Problem.
Because of the ever present danger from electrical shock, and the existence of high pressure water
and gas on the system, it is strongly recommended that only qualified service personnel perform actual
repairs.
To use this guide you should first recognize the Problem. Once this has been accomplished, you
should refer to the Problem Cross Reference Guide, which will direct you to the troubleshooting
section or sections which may be responsible for that particular Problem.
Under each of the sections, Section 1: CO
2 Gas System, Section 2: Carbonated Water System,
Section 3: Circulating System, Section 4: Compressed Air System, Section 5: Dispensing valve and
tower, Section 6: Electrical System, Section 7: Refrigeration System, Section 8: Syrup System,
Section 9: Water Booster System, and Section 10: Water Filter System, youll first find the Problem
listed in bold type starting on the left margin. It will be followed by three headings also in bold type
and each with its own column. The first is a Qualifier which is designed to quickly qualify or eliminate
the Probable Causes listed to the right and below the qualifying statement. Example: Under Section 7:
Refrigeration System, youll find three Qualifiers for the same problem, Warm drinks. Carbonated
Water Temperature over 40°F (5°C). Each asking you to determine the status of the Refrigeration
Compressor and Ice Bank before proceeding to the second column Probable Causes. Not all problems
have Qualifiers, but for those that do, first examine each one listed below the Problem before
continuing through Probable Causes. The third heading, Corrective Action found on the right margin,
will direct you in determining if the Probable Cause is actually responsible for the problem and what
should be done to remedy the problem.
On occasion, youll find Note and Caution statements which have been included to make
special references to items which frequently are misunderstood or ignored.
This guide is intended to assist you in locating the cause of a problem. It is not, however, to be
considered a service and repair manual in that Multiplex models vary in design.
It has been written to encompass all model Refrigeration Units. Some differences from model to
model will become obvious and it will be required of the reader to apply this guide to each unit. Of
main concern, is on Dual Carbonating and Circulating Systems you must consider there are two
separate Carbonating and Circulating Systems.