Specifications

Multiplex Company, Inc.
Fountain Troubleshooting Guide
9
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.
No CO2 gas or water
present at dispensing
valves.
CO
2 gas is present at
dispensing valves but no
water.
Section 2: Carbonated Water System (continued)
Qualifier Probable Cause Corrective Action
Malfunction of Refrigera-
tion System.
Malfunction of Circulating
System.
No power to carbonator.
Water supply restricted to
carbonator pump.
Water Filter restricted.
Water Inlet strainer
clogged.
Liquid Level Control defec-
tive.
Electrode Assembly defec-
tive.
Refer to Troubleshooting Section 7: Refrigera-
tion System under No carbonated water at
any of the dispensing valves (freeze up).
Refer to Troubleshooting Section 3: Circulat-
ing System under No carbonated water at any
of the dispensing valves.
Verify toggle switch for Carbonator is in the
on position and Main Power Supply is on.
Verify water to unit by observing Filtered Wa-
ter Pressure Gauge. It should register 55 psi
(3.9kg/cm
2
). To adjust, loosen Locknut, turn
Adjustment Screw clockwise to increase, coun-
terclockwise to decrease. If regulator will not
respond to adjustments, replace regulator. Ex-
amine Water Shut-off Valve(s) to Carbonator and
insure they are in the on position.
Place Filter By-pass Valve into the Filter By-
pass position. Replace Cartridge Filter. Reposi-
tion valve handle to operating position.
Remove Filter Screen from Inlet Strainer in car-
bonator Pump (Brass), flush with water to clean
and reassemble.
Push Toggle Switch for carbonator and circula-
tor to the off position. Shut off Main Power
Supply unit. Remove electrical Access Panel
from unit. Locate liquid level control. Using a
pair of insulated needle nose pliers, carefully
remove the white wire from the terminal
marked H and the black wire from the ter-
minal marked L on the Liquid Level Control
Board. Position safely to side. Turn on Main
Power Supply. Push carbonator Switch to the
on position. If carbonator pump and motor
do not cycle on immediately, that Liquid
Level Control is defective. Replace.
If Liquid Level Control is operating, test the
Electrode Assembly, refer to Probable Cause
Liquid Level Control Defective. Verify wire
leads are dry and that they are not touching. If
not, replace Electrode.
No carbonated water at any of the dispensing valves