Cornelius MJ30-4 PC, MJ32-4 PB, MJ32-4 PC Troubleshooting Guide, Problem, Probable Cause, Remedy

Models: MJ31-4 PC MJ31-4 PB MJ30-4 PC MJ30-4 PB MJ32-4 PC MJ32-4 PB

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Troubleshooting Guide

Problem

Probable Cause

Remedy

WATER LEAKS FROM

Nozzle pieces improperly

Static mixer inserted in nozzle body

BOTTOM OF DISPENSING

assembled.

upside down. Cone shaped end must

VALVE.

 

be visible when remounting the

 

 

nozzle assembly to the dispenser.

WATER CONTINUOUSLY

Water solenoid valve not

Disassemble water solenoid located

DRIPS FROM NOZZLE.

shutting off tightly.

at the valve and check for foreign

 

 

material in the valve seat. Check the

 

 

armature for binding, check the

 

 

plunger and the seat for defects.

 

 

Replace parts as needed.

 

 

 

UNIT CONTINUES TO

Inoperative or defective push

Check the operation of the push

DISPENSE AFTER BUTTON

button switch, or portion

button for sticking. Check continuity

HAS BEEN RELEASED.

control board.

of switch. Replace as needed.

 

 

CAUTION: Access to this panel

 

Relay on voltage regulator

requires removal of the bonnet while

 

board hangs up or is stuck

the dispenser is plugged in and

 

open.

operational. *Voltage regulator board

 

 

is found in the electrical box mounted

 

 

to the refrigeration deck. There is one

 

 

board for each valve. Gently tap the

 

 

relay. If dispensing stops, relay was

 

 

hung up . If tapping the relay solves

 

 

the problem, it should be noted that if

 

 

a relay sticks once , it will probably

 

 

stick again. Replace as needed.

 

 

Pull the connector marked DOOR ,

 

Defective Voltage Regulator

lower right hand connector on the

 

(VRB) Board.

VRB board. If the unit still continues

 

 

to dispense the VRB board is

 

 

defective and needs to be replaced.

TWO OR MORE PUMPS

Insulator pad missing or not

On the valve that is dispensing in

OPERATE WHEN ONLY

properly positioned between

error, check the insulator pad

ONE BUTTON IS PUSHED.

the transistor on VRB board

between the transistor on the top of

 

and mounting bracket.

the VRB board and the mounting

 

 

bracket. If this pad is missing or

 

 

improperly aligned, the VRB board

 

 

will make contact with the bracket.

 

 

Current will run through the bracket

 

 

and set off the valve. Refer to

 

 

drawing found in this manual.

 

 

 

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Cornelius MJ30-4 PC, MJ32-4 PB, MJ32-4 PC, MJ30-4 PB, MJ31-4 PB Troubleshooting Guide, Problem, Probable Cause, Remedy