Specifications
Multiplex Company, Inc.
Fountain Troubleshooting Guide
17
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.
Air Compressor oper-
ates excessively.
Leak at Shake Machine,
Orange Juice Dispenser or
other optional equipment.
Leak at Compressed Air
System.
Automatic Drain or Pet-
cock leaking.
Air leak in syrup system.
Restricted Germicidal Fil-
ter on Air Compressor.
Water in Air Accumulator
Tank.
Motor/Pump Assembly in-
operative.
Pressure Switch improp-
erly adjusted or defective.
Check valve defective.
Turn air supply to Shake Machine to off posi-
tion. If Air Compressor cuts out and maintains
pressure, leak is at Shake Machine or Orange
Juice Dispenser. Refer to manufacturers
manual for Troubleshooting.
Use a soap solution around all connections start-
ing from the Air Motor/Pump assembly to the
Low and Medium Pressure Syrup Regulators. If
bubbles appear, tighten loose connections care-
fully.
Place drain line for bottom of Automatic Drain
or Petcock in cup of water. If air bubbles ap-
pear, Automatic Drain or Petcock is leaking.
Clean and/or replace as necessary.
Refer to Troubleshooting Section 8: Syrup Sys-
tem under No syrup, air leak at syrup sys-
tem.
Replace Germicidal Filter.
Note: This Filter is not designed to be cleaned,
but must be replaced when exhausted.
Verify Automatic Drain is operating. If inopera-
tive or defective, replace. If unit is not
equipped with Automatic Drain use Petcock to
remove water from tank.
If Motor/Pump assembly operate without build-
ing up to 90 psi (6.3 kg/cm
2
) as needed to cycle
off. Pump Assembly is defective and must
be replaced.
Observe Air Pressure Gauge to insure proper
cycle on at 70 psi (4.9 kg/cm
2
) and cycle off
at 90 psi (6.3 kg/cm
2
) settings. Refer to instruc-
tions found under Switch cover for adjusting.
If Switch will not respond to adjustment, re-
place switch.
While Air Compressor is in the off cycle, use
a soap solution around Head Gasket on Motor/
Pump Assembly. If bubbles appear, replace
Check valve located on the Air Accumulator
Tank.
No syrup (continued)
Section 4: Compressed Air System (continued)
Qualifier Probable Cause Corrective Action