Specifications

108 Part Number STH12 9/10
Carbonator pump and motor will not cycle OFF (possibly noisy pump)
Little or no
carbonated water at
dispensing valve.
Primary CO
2
Regulator
adjusted at
extremely high
pressure.
Verify CO
2
Primary Regulators are set
at 90 psi (6.3 kg/cm
2
). Adjust if
necessary. If regulator will not star in
adjustment, replace regulator.
Water supply to
Carbonator
Pump shut-off
or restricted.
Verify water to unit by observing
Filtered Water Pressure Gauge. It
should register 55 psi (3.9 kg/cm
2
).
Examine Water Shut-off Valves to
carbonator and ensure they are in the
ON position. Examine Pump Strainer
for restriction. Clean if necessary.
Water Filter
restricted.
Place Filter By-pass valve into the
“Filter By-pass” position. If carbonator
pump and motor immediately cycle
OFF, Filter Cartridge is restricted.
Replace Cartridge.
Back Flow
Preventer or
Double Check
Valve.
Examine Filter Water Pressure
Gauge. If it registers 90 psi (6.3
kg/cm
2
) CO
2
gas is passing from the
carbonator tank and through the Back
Flow Preventer or Double Check
Valve, preventing water from entering
pump. Clean or replace Back Flow
Preventer/Double Check Valve.
Carbonator
Pump worn.
Remove top cover from Remote
Refrigeration Unit. Locate Toggle
Relief Valve on Carbonator Tank and
lift lever to allow CO
2
gas to escape
from Tank for 30 seconds. If during
this time Carbonator Pump cycles
OFF, pump is worn and should be
replaced.
Coupling Key
defective.
Loosen the Coupling Clamp with a
flat-blade screwdriver and disengage
Pump from Motor. Examine Coupling
Key in Pump. If defective, replace.
Qualifier
Probable
Cause
Corrective Action