TROUBLE SHOOTING
IMPORTANT: Only qualified personnel should service the TOPPER unit and components.
WARNING: To avoid personal injury and or property damage, always disconnect electrical power,
shut off plain water and CO2 supplies before starting any repairs. If repairs are to be made to the
carbonated water system, bleed carbonated water system pressure before proceeding. If repairs are
to be made to syrup system, remove quick disconnects from syrup tanks, or remove QCD from BIB,
then bleed system pressure before proceeding.
CARBONATOR
Trouble
Probable
Cause
Remedy
Water pump
motor will not
operate
1.
2.
3.
4.
5.
Inoperable water pump/ motor.
Overheated motor (cut off by
thermal overload protector).
Electrode inside carbonator tank
defective.
L.L.C. assembly Inoperable.
Loose electrical connection
and/or open electrical circuit.
Defective pump protector, S-103
1.
2.
3.
4.
5.
Replace water pump/ motor.
Check for proper line voltage.
Allow motor time to cool.
Replace carbonator tank
electrode.
Replace L.L.C. assembly.
Tighten connection and/or repair
open circuit. Check line voltage.
Replace pump protector
Water pump
motor will not
shut off
1.
2.
3.
4.
5.
Defective water pump.
Electrode inside carbonator tank
defective.
L.L.C. assembly inoperable.
Loose electrical connection and
or open electrical circuit.
Carbonated water leak.
1.
2.
3.
4.
5.
Replace water pump.
Replace carbonator tank
electrode.
Replace L.L.C. assembly.
Tighten connection and or repair
open ground circuit.
Find and repair leak.
Water Pump
motor will not
shut off and
pressure relief
engaged
1.
2.
Electrode inside carbonator does
not sense ground.
L.L.C. assembly inoperable.
1.
2.
Replace defective electrode or
check and tighten ground
connection at control box.
Replace L.L.C. assembly.
Short cycling of
water pump
motor
1.
2.
3.
Ground connection loose or
disconnected.
Electrode inside carbonator tank
defective.
Carbonated water leak in system.
L.L.C. assembly inoperable.
1.
2.
3.
Attach or tighten ground
connection.
Replace carbonator tank
electrode.
Repair carbonated water leak.
Replace L.L.C. control assembly.
Water pump
capacity to low
1.
2.
3.
4.
Inlet water volume supply to low.
Water motor/pump worn out.
Kinked or restricted water supply
line.
Foreign object in water pump or
restriction to water pump.
1.
2.
3.
4.
Increase diameter of supply line,
install holding tank.
Replace water pump.
Clear or replace restricted water
supply line.
Clear restrictions and check pump
strainer for debris.
Water pump
operates but
water pump
does not pump
1.
2.
3.
4.
Water supply to low or turned off.
Inoperative water pump.
Water supply filter clogged.
Water pump strainer clogged.
1.
2.
3.
4.
Inlet water supply must be a
minimum of 3/8”.
Replace water Pump.
Replace filter.
Clean water pump strainer.
6-1
