Cornelius R-404A REFRIGERANT Troubleshooting Control Panel Switches and Fault Messages

Models: R-404A REFRIGERANT

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TROUBLESHOOTING

IMPORTANT: Only qualified personnel should service internal components or electrical wiring.

WARNING: If repairs are to be made to a product system, remove quick disconnects from the applicable product tank, then relieve the system pressure before proceeding. If repairs are to be made to the CO2 system, stop dispensing, shut off the CO2 supply, then relieve the

system pressure before proceeding. If repairs are to be made to the refrigeration system, make sure electrical power is disconnected from the unit.

IMPORTANT: The following CO2 and liquid disconnects disconnecting and connecting procedure for soft drink tank replacement or filling soft drink tank in place must be performed in order as follows:

1.To disconnect soft drink tank from Unit syrup system.

A.Disconnect liquid disconnect from soft drink tank. NOTE - Disconnecting liquid quick disconnect from soft drink tank first prevents syrup from backflowing through Unit syrup flow regulator, which may alter regulator adjustment.

B.Second, disconnect CO2 quick disconnect from soft drink tank.

2.To connect soft drink tank into Unit syrup system.

A.First, connect CO2 quick disconnect to soft drink tank to pressurize tank.

B.Second, connect liquid quick disconnect to soft drink tank.

TROUBLESHOOTING CONTROL PANEL SWITCHES AND FAULT MESSAGES

Trouble

Probable Cause

Remedy

ONE OR MORE CONTROL

A. Flat cable not properly

A. Properly connect flat cable to

PANEL SWITCHES NOT

connected to control switch

control switch module or master

OPERATING.

module or master circuit

circuit board.

 

board.

 

B.Flat cable connected between control switch module and master circuit board pinched and shorted out or broken wire in cable.

B.Check cable for pinched or broken wire condition and repair or replace as necessary.

 

C. Inoperable switch(s) on control

C. Replace control panel switch

 

panel switch module.

 

module.

 

D. Master circuit board not

D.

Replace master circuit board.

 

operating properly.

 

 

 

 

 

 

ALL CONTROL PANEL

A. Electric power disconnected

A.

Restore electric power to Unit.

SWITCHES NOT OPERATING.

from Unit.

 

 

B.‘‘SECURITY SWITCH’’ has not been pressed to activate control panel switches.

B.Press and hold ‘‘SECURITY SWITCH’’ for 3 seconds to restore control panel switches to operation.

C. ‘‘SECURITY SWITCH’’

C. Replace control panel switch

inoperable (control switches

module.

deactivated).

 

D.Flat cable not properly connected to control switch module or master circuit board.

D.Properly connect flat cable to control switch module or master circuit board.

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Cornelius R-404A REFRIGERANT service manual Troubleshooting Control Panel Switches and Fault Messages