Specifications

00218012 Revision B (KAK) 7 August, 2000
4
Multiplex Company, Inc.
Fountain Troubleshooting Guide
Section 1: CO2 Gas System
On units not equipped with Air Pump, check all Probable Causes listed below.
Qualifier Probable Cause Corrective Action
Troubleshooting Guide
WARNING: Inspection, testing, and repair of elec-
trical equipment should be performed only by
qualified service personnel. The unit should be
unplugged when servicing, except when electri-
cal tests are required.
DANGER: Use extreme care during electrical cir-
cuit tests. Live circuits may be exposed.
If leak occurs while
Change-over valve is
positioned on Air, follow
the Probable Causes
(for units equipped with
Air Pump).
If leak occurs only while
Change-over valve is
positioned on CO
2, refer
to Troubleshooting
Section 8: Syrup Sys-
tem.
CO
2 Tank leaking.
CO
2 Washer damaged or
missing.
Primary Regulator Dia-
phragm leaking.
Ruptured Line Assembly or
leaks at connections.
A to B Change-over Valve
leaking.
CO
2 Low Pressure Switch
leaking.
CO
2 Check valve leaking.
Back Flow Preventer stuck
open.
Carbonator Tank Relief
valve leaking.
Gas leak at the syrup sys-
tem.
Use a soap solution around CO
2 Tank valve Stem
to locate leaks. If leaks are present, bubbles
will appear. If valve Stem leaks at Tank, replace
CO
2 Tank.
Use a soap solution around Primary Regulator
Coupling Nut and CO
2 Tank Stem. If bubbles ap-
pear, remove Regulator and replace CO
2 Washer
found inside Nut. Secure Regulator to Tank and
check for leaks.
Use a soap solution around Primary Regulator
Adjustment Screw in Bonnet. If bubbles appear,
diaphragm is leading. Replace Primary Regula-
tor.
Use a soap solution around all connections. If
bubbles appear, tighten loose connections care-
fully.
Use a soap solution around A and B CO
2 Tank
Change-over Valve, tighten if bubbles appear
at Connections to stop leaks.
Use a soap solution around Low Pressure CO
2
Switch. If bubbles appear at pipe, tighten Con-
nection. If bubbles appear at Terminal end of
Switch - replace Switch.
Use a soap solution around Check valve. If
bubbles appear, tighten Connection to stop
leaks.
Use a soap solution around Back Flow Preven-
ter. Tighten if bubbles appear at connection. If
bubbles appear at Vent Hole on underside of
Back Flow Preventer, clean out or replace Back
Flow Preventer valve and corresponding Water
Check valve.
Use a soap solution around Relief valve. If
bubbles appear, replace Relief valve.
Refer to Troubleshooting Section 8: Syrup Sys-
tem under No syrup or insufficient syrup in
finished drink.
Loss of CO2