Specifications

Multiplex Company, Inc.
Fountain Troubleshooting Guide
31
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.
Pump and Motor cycles
on and off exces-
sively.
Peculiar taste in Non-
carbonated beverages.
Leak on Booster System.
Check valve defective.
Pressure Switch improp-
erly adjusted or defective.
Accumulator Tank pressure
set improperly.
Accumulator Tank bladder
ruptured.
Motor overheating.
Water Filter contami-
nated.
Accumulator Tank bladder
ruptured.
Malfunction of Carbonated
Water System.
Locate water leaks on system and repair.
Observe Filtered Water Pressure Gauge. If pres-
sure rises and drops with Pressurized Filtered
Water Gauge, the Water Inlet Check valve on
Pump is defective. Replace Check valve.
Observe Pressurized Filtered Water Pressure
Gauge to insure proper cycle on at 65 psi
(4.6 kg/cm
2
) and cycle off at 85 psi
(6.0kg/cm
2
). Refer to instructions found un-
der Switch Cover for adjusting. If Switch will
not respond to adjustment, replace switch.
Push Toggle Switch and Water Shut-off Valve to
Booster Pump to the off position. Activate
Plain Water button until water flow ceases.
Using a tire gauge verify a 60 psi (4.2 kg/cm
2
)
charge on Tank. Recharge if necessary.
Note: When charging Accumulator Tank, only
AIR should be used.
Repeat procedures above. If water is found in-
side Air Chamber when verifying pressure
charge, bladder is ruptured. Replace Accumu-
lator Tank.
Using a flat-blade screwdriver, loosen Coupling
Clamp and disengage Pump from Motor. Turn
Coupling Key by hand, in back of Pump. If Cou-
pling Key is difficult to turn, it may cause de-
fective Motor to overheat. Replace Motor if
necessary.
Replace Filter. Refer to Troubleshooting Sec-
tion 10: Water Filter under Peculiar taste.
Replace Accumulator Tank. Refer to Pump and
Motor Cycle on and off excessively Accu-
mulator Tank bladder ruptured.
Refer to Troubleshooting Section 2: Carbon-
ated Water System under Peculiar taste, Prob-
able Cause: Back Flow Preventer leaking.
Low or no water pressure at noncarbonated beverages (continued)
Section 9: Water Booster System (continued)
Qualifier Probable Cause Corrective Action