Specifications

Multiplex Company, Inc.
Fountain Troubleshooting Guide
7
00218012 Revision B (KAK) 7 August, 2000
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.
Malfunctioning of Re-
frigeration System.
Malfunctioning of Circu-
lating System.
Beverages at dispensing
tower are below 40°F
(5°C).
Section 2: Carbonated Water System
Qualifier Probable Cause Corrective Action
Beverages at dispensing
tower are above 40°F
(5°C).
CO
2 supply exhausted.
Primary CO
2 Regulator out
of adjustment or inopera-
tive.
Water Regulator incor-
rectly adjusted or inopera-
tive.
Improper water treat-
ment.
Carbonator Pump worn
(Brass pump).
Pressure Relief Valve is
leaking.
Refer to Troubleshooting Section 7: Refrigera-
tion System under Warm drinks.
Refer to Troubleshooting Section 3: Circulat-
ing System under Warm drinks.
Verify CO
2 Tank pressure is a minimum of 500psi
(35 kg/cm
2
) on Primary Pressure Regulator
Gauge marked 0-2000 psi. Switch to full tank if
necessary.
Insure CO
2 Shut-off Valves to Carbonators are
both in the on position. Refer to Trouble-
shooting Section 1: CO2 Gas System under
Flatdrinks.
Verify CO
2 Primary Regulators are set at 90 psi
(6.3 kg/cm
2
). Adjust if necessary if Regulator
will not stay in adjustment replace Regulator.
Verify Filtered Water Pressure Gauge registers
55 psi (3.9 kg/cm
2
), if higher than 55 psi, flood-
ing of Carbonator will occur. To adjust, loosen
Locknut, turn Adjustment Screw clockwise to
increase, counterclockwise to decrease. If regu-
lator will not respond to adjustments, replace
regulator.
Verify By-pass handle is in the filter operat-
ing position. Insure Filter Cartridge is still ef-
fective, if necessary replace Cartridge. Refer
to Troubleshooting Section 10: Water Filter
System.
Dispense Carbonated Water while listening for
carbonator pump and motor to cycle on at
Refrigeration Unit. Pumps should operated be-
tween 6 to 12 seconds before cycling off. If
operating time exceeds 30 seconds carbonator
pump is worn, replace Pump.
Remove top cover from Remote Refrigeration
Unit. Dispense Carbonated Water until carbon-
ator Pumps and Motor cycle on. Observe Pres-
sure Relief Valves on carbonator Tank. If water
is observed escaping from either, replace leak-
ing Relief valve.
Note: Do not confuse the Water Bath Make-up
valve for the carbonator Tank Relief valves.
Flat drinks