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IDC Installation Manual
Publication Number: 621057403INS - 14 - © 2005-2008, IMI Cornelius Inc.
DIAGNOSTICS GUIDE FOR THE MAIN CONTROL BOARD
State
Observed State
of Red LED
Sensor Input Control Response Service Remedy
0 Flash rate 3
seconds
Both probes read “wet” Standby mode. Pump
= OFF
No service required
1 Flash rate
1/2 second
Pump is OFF and
HIGH probe reads “dry”
and LOW probe reads
“wet”
Waiting for level to
drop below LOW
probe. Pump = OFF
No service required
2 Flash rate
1/2 second
Both HIGH and LOW
probes read “dry”
Normal mode.
Pump = ON
No service required
3 Flash rate
1/2 second
Entered when HIGH
probe does not detect
liquid, and LOW probe
does detect liquid, and
pump is ON
Normal mode.
Pump = ON
No service required
4 Flash rate 1
second
Entered when HIGH
probe reads “wet” and
LOW probe reads “dry”
THIS IS AN ERROR
CONDITION.
- Check electrical
connections at the
carbonator tank, and at
connector J4 on the
main control board
- Black wire should be
connected to the LOW
probe and also to Pin 4
of Connector J4
- Reverse the
connections if incorrect
- Replace harness if
necessary
5ON
continuously,
but “flickers”
every 3
seconds
Poor signal connection
to the carbonator tank.
May result in short
cycling of the
carbonator pump.
Able to continue to
function but
carbonator pump
short-cycles. Pump
will come on each time
a drink is drawn. THIS
SITUATION SHOULD
BE CORRECTED.
Check the harness
connections of the red
signal wire at both ends:
1) at the carbonator ring
terminal and
2) at Pin 5 of the J4
connector at the main
control board
6ON
continuously
Entered when pump
has run continuously
for 5 minutes
THIS IS AN ERROR
CONDITION.
Unplug the unit and plug
it back in. This will reset
the unit's main control
board and restart the
carbonator pump.