Diagnostics Guide For The Main Control Board - Cornelius In-N-Out Burger NGF 255 Installation Manual

In-N-Out Burger NGF 255 Installation Manual
D G
IAGNOSTICS UIDE FOR THE
Observed State of
State
Red LED
Flash rate 3 sec-
0
onds
Flash rate 
1
1/2 second
Flash rate 
2
1/2 second
Flash rate 
3
1/2 second
Flash rate 1 sec-
4
ond
ON continuously,
5 but "flickers" every
3 seconds
6 ON continuously
Publication Number: 621058476INS
M C
AIN
Sensor Input
Both probes read "wet"
Pump is OFF and HIGH
probe reads "dry" and LOW
probe reads "wet"
Both HIGH and LOW probes
read "dry"
Entered when HIGH probe
does not detect liquid, and
LOW probe does detect liq-
uid, and pump is ON
Entered when HIGH probe
reads "wet" and
LOW probe reads "dry"
Poor signal connection to the
carbonator tank. May result
in short cycling of the car-
bonator pump.
Entered when pump has run
continuously for 5 minutes
- 14 -
B
ONTROL OARD
Control Response
Standby mode. Pump =
OFF
Waiting for level to drop
below LOW probe. Pump =
OFF
Normal mode. 
Pump = ON
Normal mode. 
Pump = ON
THIS IS AN ERROR CON-
DITION.
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.
THIS IS AN ERROR CON-
DITION.
Service Remedy
No service required
No service required
No service required
No service required
- Check electrical connections
at the carbonator tank, and at
connector J4 on the main
control board
- Black wire should be con-
nected to the LOW probe and
also to Pin 4 of Connector J4
- Reverse the connections if
incorrect
- Replace harness if neces-
sary
Check the harness connec-
tions of the red signal wire at
both ends: 
1) at the carbonator ring ter-
minal and 
2) at Pin 5 of the J4 connector
at the main control board
Unplug the unit and plug it
back in. This will reset the
unit's main control board and
restart the carbonator pump.
© 2011, IMI Cornelius Inc.