Cornelius IDC 2 Series Service Manual page 23

Slushy ice or water in
hopper
Beverage does not
dispense
Beverage is too sweet
Unit will not dispense
carbonated drinks.
Dispenses syrup only.
Unit will not dispense
carbonated drinks.
Spurts CO and syrup
2
only.
Carbonated drinks are
flat (low on
carbonation)
© 2007-2019, Cornelius Inc.
Blocked drains in cold plate
Poor ice quality due to water quality or ice
maker problems
No 24VAC to valves
No CO pressure
2
Valve brix requires adjustment
Carbonator is not operating
No CO in carbonator
2
City water pressure supply low or
inconsistent
CO pressure in carbonator tank is too high.
2
Water valve will not open
Carbonator tank is empty, because tank was
emptied while power was applied to unit. 5
minute time-out of carbonator pump/motor
occurred, and carbonator pump is locked
off.
Note that this can occur while the water filter
system 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
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IDC 2XX Service Manual
Remove access covers in cold plate cover &
inspect/clean drains
Correct water quality or repair ice maker
Restore 24 VAC to valves
Restore CO pressure
2
Adjust valve brix
Repair carbonator
Restore CO pressure in carbonator
2
Booster pump must be used if dynamic
water pressure drops below 40 psig.
Check CO pressure regulator setting. 75
2
psig recommended. Relieve pressure from
carbonator tank.
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
carbonator pump, 2) after 5 minutes reset
and retry carbonator pump. If water supply
is restored, the 5 minute timeout will not
occur. Repeat reset a second time, but on a
third time, then lockout carbonator pump,
which will generate a service call.
Replace CO
2
CO setting for the carbonator tank is 75
2
psig, max water pressure is 60 psig. If
necessary, install a water pressure
regulating valve.
Publication Number: 621057403SER