Specifications

Part Number STH12 9/10 111
Circulating System
Qualifier
Probable
Cause
Corrective Action
Warm drinks
Drinks warm
throughout the day,
warm all the time.
Malfunction of
Refrigeration
System.
Refer to Troubleshooting
“Refrigeration System” under Warm
drinks (carbonated water
temperature over 40°F [5°C]).
Drinks warm during
periods of low
demand, much
colder during
periods of high
demand.
No power to
Circulating
Motor.
Verify Switch to Circulating Motor is in
the ON position and Main Power
Supply is ON.
Carbon Particles in
finished drink.
Motor defective. Using a flat-blade screwdriver, loosen
the Coupling Clamp and disengage
Pump from Motor. If Motor will not
operate, verify voltage across Motor
Terminal with voltmeter. If voltage
reads from 110 to 120 VAC, the Motor
is defective and should be replaced.
Circulating
Pump defective
(stainless steel).
Dispense approximately 1 gallon of
carbonated water at dispensing
valves. If temperature of carbonated
water drops, Circulating pump is not
operating. Examine Coupling Key
found between Pump and Motor
Shaft. If coupling key is defective,
replace. If key is operational,
Circulating pump is defective, replace.
No CO
2
gas or
water present at
dispensing valve.
Malfunction of
Water Filter.
Refer to Troubleshooting “Water Filter
System” under Carbon particles in
finished drinks.
Malfunction of
Carbonated
Water System.
Refer to Troubleshooting “Carbonated
Water System” under Carbon
particles in finished drinks.
Circulating
Pump defective
(Stainless
Steel).
Remove top cover from Refrigeration
Unit. Loosen Coupling Clamp with a
flat-blade screwdriver and disengage
Pump from Motor. Turn Pump shaft
with screwdriver. If Pump does not
turn freely and/or carbon is found in
Pump, carbon veins in pump are
defective. Replace Circulating Pump.
CO
2
gas is present
at dispensing
valves but no
carbonated water.
Malfunction of
Refrigeration
System.
Refer to Troubleshooting
“Refrigeration System” under No
carbonated water at dispensing
valve (freeze up).
Particles
obstructing flow
through
Circulating
Circuit (In-line
Strainer).
Remove top cover from Remote
Refrigeration. Push toggle switch to
carbonator and circulator to the OFF
position. Lift lever on Toggle Relief
valve at top of carbonator Tank until
pressure is completely released.
Remove In-line Strainer Screen. Flush
with clean water and reassemble.
Malfunction of
Carbonating
System.
If CO
2
gas is present at the
Dispensing Valves and there is no
water, the problem is in the
Carbonated Water System. Refer to
Troubleshooting “Carbonated Water
System”.