Specifications
106 Part Number STH12 9/10
No carbonated water at any of the dispensing valves
No CO
2
gas or
water present at
dispensing valves.
Malfunction of
Refrigeration
System.
Refer to Troubleshooting
“Refrigeration System” under No
carbonated water at any of the
dispensing valves (freeze up).
Malfunction of
Circulating
System.
Refer to Troubleshooting “Circulating
System” under No carbonated water
at any of the dispensing valves.
CO
2
gas is present
at dispensing
valves but no water.
No power to
carbonator.
Verify toggle switch for Carbonator is
in the ON position and Main Power
Supply is ON.
Water supply
restricted to
carbonator
pump.
Verify water to unit by observing
Filtered Water Pressure Gauge. It
should register 55 psi (3.9 kg/cm
2
). To
adjust, loosen Locknut, turn
Adjustment Screw clockwise to
increase, counterclockwise to
decrease. If regulator will not respond
to adjustments, replace regulator.
Examine Water Shut-off Valve(s) to
Carbonator and ensure they are in the
ON position.
Water Filter
restricted.
Place Filter By-pass Valve into the
Filter By-pass position. Replace
Cartridge Filter. Reposition valve
handle to “operating” position.
Water Inlet
strainer
clogged.
Remove Filter Screen from Inlet
Strainer in carbonator Pump (Brass),
flush with water to clean and
reassemble.
Liquid Level
Control
defective.
Push Toggle Switch for carbonator
and circulator 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 terminal 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.
Electrode
Assembly
defective.
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.
Qualifier
Probable
Cause
Corrective Action