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TROUBLESHOOTING
IMPORTANT: Only qualified personnel should service internal components or electrical wiring.
WARNING: If repairs are to be made to carbonated water system, disconnect electrical
power to Cooling Unit, shut off plain water and CO
2
supplies, and relieve the carbonated
water system pressure before proceeding. If repairs are to be made to syrup system,
remove quick disconnects from applicable syrup tank, then relieve the system pressure before
proceeding. If repairs are to be made to CO
2
system, stop dispensing, shut off CO
2
supply, then
relieve the system pressure before proceeding.
TROUBLESHOOTING SENTRY III--A POST--MIX COOLING UNIT
Trouble Probable Cause Remedy
DISPENSED PRODUCT
CARBONATION TOO LOW.
A. Carbonator CO
2
regulator out
of adjustment for existing
water conditions or
temperature.
A. Adjust carbonator CO
2
regulator
as instructed.
B. Water, oil, or dirt in CO
2
supply B. Remove contaminated CO
2
supply. Clean CO
2
system (lines,
regulators,etc.) using a mild
detergent. Replenish with a clean
CO
2
supply.
ONLY SYRUP DISPENSED. A. Plain water inlet supply line
shutoff valve closed.
A. Open plain water inlet supply line
shutoff valve.
B. Carbonator power switch in
‘‘OFF’’ position.
B. Place carbonator power switch in
‘‘ON’’ position.
C. Carbonator inoperable. C. Call Service Person.
D. Water filter clogged. D. Replace water filter.
WARM PRODUCT BEING
DISPENSED
A. Carbonated water circulating
pump power switch in “OFF”
position.
A. Place circulating pump power
switch in “ON” position.
B. Inoperable carbonated water
circulating pump or motor.
B. Call Service Person.
TROUBLESHOOTING CARBONATOR
WATER PUMP WILL NOT
OPERATE
A. Carbonator power switch in
“OFF” position.
A. Place switch in “ON” position.
B. Inoperative water pump motor. B. Call Service Person.
WATER PUMP MOTOR
OPERATES BUT WATER
PUMP DOES NOT PUMP
WATER.
A. Water pump water inlet
strainer screen dirty.
A. Call Service Person.
B. Kinked water supply line. B. Straighten water supply line.
C. Water pump worn out. C. Call Service Person
WATER PUMP CAPACITY
TOO LOW.
A. Water pump water inlet
strainer screen dirty.
A. Call Service Person
B. Water supply capacity too low. B. Inlet water supply must be at a
minimum of 150--gallons per hour
with a maximum water pressure
of 70--psi.