Specifications
104 Part Number STH12 9/10
Carbonated Water System
Qualifier
Probable
Cause
Corrective Action
Flat drinks
Malfunctioning of
Refrigeration
System.
Beverages at
dispensing
tower are above
40°F (5°C).
Refer to Troubleshooting
“Refrigeration System” under Warm
drinks.
Malfunctioning of
Circulating System.
Refer to Troubleshooting “Circulating
System” under Warm drinks.
Beverages at
dispensing tower
are below 40°F
(5°C).
CO
2
supply
exhausted.
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.
Ensure CO
2
Shut-off Valves to
Carbonators are both in the ON
position. Refer to Troubleshooting
“CO
2
Gas System” under Flat drinks.
Primary CO
2
Regulator out of
adjustment or
inoperative.
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.
Water Regulator
incorrectly
adjusted or
inoperative.
Verify Filtered Water Pressure Gauge
registers 55 psi (3.9 kg/cm
2
), if higher
than 55 psi, flooding of Carbonator will
occur. To adjust, loosen Locknut, turn
Adjustment Screw clockwise to
increase, counterclockwise to
decrease. If regulator will not respond
to adjustments, replace regulator.
Improper water
treatment.
Verify By-pass handle is in the “filter
operating” position. Ensure Filter
Cartridge is still effective, if necessary
replace Cartridge. Refer to
Troubleshooting “Water Filter System”
Carbonator
Pump worn
(Brass pump).
Dispense Carbonated Water while
listening for carbonator pump and
motor to cycle ON at Refrigeration
Unit. Pumps should operated between
6 to 12 seconds before cycling OFF. If
operating time exceeds 30 seconds
carbonator pump is worn, replace
Pump.
Pressure Relief
Valve is leaking.
Remove top cover from Remote
Refrigeration Unit. Dispense
Carbonated Water until carbonator
Pumps and Motor cycle ON. Observe
Pressure Relief Valves on carbonator
Tank. If water is observed escaping
from either, replace leaking Relief
valve.
Note: Do not confuse the Water Bath
Make-up valve for the carbonator Tank
Relief valves.