Cornelius In-N-Out Burger NGF 255 Installation Manual page 17

Unit will not dispense car-
bonated drinks. Spurts
CO and syrup only.
2
Carbonated drinks are
flat (low on carbonation)
Low water pressure
No Syrup or Watered
down drink dispensed
Symptom
Carbonator pump does
not start to fill tank
Power cord is connected
but carbonator pump
does not run.
Carbonator pump is short
cycling with every drink
drawn
Carbonator tank overfills,
overflows through relief
valve, and pump shuts off
after 5 minutes.
Contact your local syrup or beverage equipment distributor for additional information and troubleshooting of beverage
system.
© 2011, IMI Cornelius Inc.
Water valve will not open
Carbonator tank is empty, because tank was
emptied while power was applied to unit. 5 min-
ute time-out of carbonator pump/motor occurred,
and carbonator pump is locked off.
Note that this can occur while the water filter sys-
tem is serviced or water supply is shutoff. If
drinks are drawn from the dispenser while water
pressure is shutoff, the carbonator pump starts
and runs continuously, then shuts off on the 5
minute timeout.
CO is out
2
Carbonator tank is 100% filled because the city
water pressure exceeds the carbonator tank
CO pressure regulator setting.
2
Could be caused by excessively long runs (over
40 ft.) of 3/8" water supply line.
Low water pressure
Plugged water filter.
Water booster bladder has burst
Syrup supply is empty
BIB pump not working
No CO or compressed air supply to BIB pump,
2
or not enough pressure
Carbonator Troubleshooting
Cause
Power cord for the carbonator pump motor is not
connected.
Carbonator pump motor is disabled.
Probes were dry, unit was powered up, water
was not turned on, and carbonator did not fill.
Water service was interrupted for more than 5
minutes.
Lower liquid level probe reads "dry" while upper
probe reads "wet"
A. Poor electrical connections between carbon-
ator tank and main control board
B. Broken wires between carbonator tank and
main control board
C. Defective liquid level probes
In-N-Out Burger NGF 255 Installation Manual
Check electrical connection to water valve.
Check resistance of coil (should be 9 ohms).
Check for voltage at coil when brand button is
depressed.
Unplug the unit and reconnect the unit. Main
control board will reset, ice agitation will occur,
and carbonator tank will refill to normal level.
1) low water pressure switch deactivates carbon-
ator pump, 2) after 5 minutes reset and retry car-
bonator pump. If water supply is restored, the 5
minute timeout will not occur. Repeat reset a sec-
ond time, but on a third time, then lockout carbon-
ator pump, which will generate a service call.
Replace CO
CO setting for the carbonator tank is 75 psig,
2
max water pressure is 60 psig. If necessary,
install a water pressure regulating valve.
Increase line size to 1/2"
Add water pressure booster pump
Change water filter
Replace water booster tank/bladder
Replace BIB
Replace BIB pump
Check CO
recommended. Replace CO
pressor.
Carbonator pump is powered off the main con-
trol board inside the electrical box of the unit.
Check that the umbilical cord is connected from
the unit to the pump motor terminal box.
Check the enable/disable switch on the carbon-
ator pump terminal box and enable it, if neces-
sary.
This results in a 5 minute timeout. Unplugging
the unit and plugging it in will reset the unit and
start the carbonator pump.
Unplugging the unit and plugging it in will reset
the unit and start the carbonator pump.
Check color of leads going to probes. Black
should go to bottom probe and white to top
probe. Reverse if incorrect.
A. Check connections at carbonator tank and at
connector J4 on the main control board.
B. Replace wire harness
C. Replace both liquid level probes
- 13 -
2
pressure regulator setting. 65 psig
2
tank or fix com-
2
Remedy
Publication Number: 621058476INS