Manitowoc Multiplex 50GAX04

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Part Number 020002365 08/25/2015

Post Mix Soda and Super-Chil™

Refrigeration Unit with Electronic Control

Installation, Operation and Maintenance Manual

This manual is updated as new information and models are released. Visit our website fo rthe latest manual.

www.manitowocbeverage.com/us

Table of Contents

Questions and Answers:

T
Tiffany DavisAug 5, 2025
Why is my Manitowoc Multiplex 50GAX04 Chiller beverage too sweet and how to fix it?
- M
  Matthew HodgesAug 5, 2025
  If the beverage dispensed by your Manitowoc Chiller is too sweet, it could be due to a few reasons. The flow control might be out of adjustment, so try adjusting it. Another possibility is insufficient soda flow caused by low carbonator pressure; in this case, adjust the CO pressure or change the tank. Leaks causing low CO pressure could also be the culprit, so repair any CO leaks. Finally, check for any obstructions in the water or soda line and clean them out.
G
Grace WalterAug 9, 2025
What to do if my Manitowoc Multiplex 50GAX04 Chiller is dispensing only syrup and CO2?
- S
  sydneyharringtonAug 9, 2025
  If your Manitowoc Chiller is only dispensing syrup and CO2, there might be a few issues. First, check the power supply and ensure the carbonator is plugged in or reset the breaker. Also, make sure the water supply is turned on. Replacing the water filter might help. Additionally, check, clean, or replace the pump strainer and the water check valve. For internal carbonator units, check for frozen water lines. If none of these work, the carbonator itself might be defective, so check, repair, or replace the carbonator pump, motor, electrode, or liquid level control.
C
Carmen JohnsonAug 13, 2025
Why are my drinks foaming from Manitowoc Multiplex 50GAX04?
- D
  David CarterAug 13, 2025
  If your drinks are foaming when dispensed from your Manitowoc Chiller, it could be due to over carbonation. Check the CO supply and reset the pressure or replace the regulator as necessary. Another possible cause is dirty lines or valves, so clean and sanitize the entire system.
T
Travis BrewerAug 17, 2025
What to do if my Manitowoc Chiller beverage is not sweet enough?
- S
  susan66Aug 18, 2025
  If the beverage from your Manitowoc Chiller isn't sweet enough, it could be that the flow control is out of adjustment; try adjusting it. Another possibility is that the soda flow is too high, so reset the CO pressure or replace the regulator if necessary. Also, check for any obstructions in the syrup line and clean it out.
C
Christopher CaseAug 21, 2025
What to do if my Manitowoc Multiplex 50GAX04 is dispensing only syrup and plain water with no pressure?
- D
  Dr. Joshua WeeksAug 21, 2025
  If your Manitowoc Chiller is dispensing only syrup and plain water without pressure, ensure you install a fresh CO2 tank. Also, adjust the HP regulator to the proper setting or check, repair, or replace the HP regulator if it's defective. Inspect the CO line for any pinches, kinks, or obstructions and repair or replace as needed.
B
Bethany BaxterAug 27, 2025
How to fix Manitowoc Chiller when water is only dispensing with no pressure?
- K
  kaylaspearsAug 27, 2025
  If your Manitowoc Chiller is only dispensing water with no pressure, the regulator(s) may be out of adjustment; check and adjust them. You might also be out of CO2, so install a fresh tank. Defective regulators could also be the issue, so check, repair, or replace them. Finally, inspect the CO line for any pinches, kinks, or obstructions and repair or replace the CO line.
A
Angela RamosAug 30, 2025
What to do if one valve on my Manitowoc Multiplex 50GAX04 won't dispense anything?
- M
  Mrs. Cynthia KennedyAug 30, 2025
  If one valve on your Manitowoc Chiller isn't dispensing anything, and you've confirmed there's power to the valve, it could be due to a broken wire or loose connection; replace or repair the wire or connector. Alternatively, the microswitch might be bad, so replace it.

Manitowoc Multiplex 50GAX04 Specifications

General

Brand	Manitowoc
Model	Multiplex 50GAX04
Category	Chiller
Language	English

Summary

Installation

Electrical Requirements

Electrical requirements, minimum ampacity, and electrical specifications.

Grounding Instructions

Essential safety guidelines for proper electrical grounding.

Plumbing and Water Supply

Potable water needs and general plumbing requirements.

CO2 Gas and Compressed Air Diagram

Unit Placement and Electrical Connections

Pre-charged Line Requirements and Condenser Install

Requirements for pre-charged lines and installing remote condensers.

Connecting Lines and System Testing

Connecting lines and testing CO2/syrup circuits.

Ice Bank Preparation

Step-by-step guide to build an ice bank.

Operation

System Functionality and Start-Up

Syrup System Operation

Sequence of Operation & Error Codes

Control Programming Modes

Details for programming modes 1-5.

ERC Programming Flowchart (Modes 1-4)

ERC Programming Flowchart (Mode 5)

Maintenance

Maintenance Schedule

Component Maintenance Tasks

Cleaning and Sanitizing Procedures

Figal Beverage System Cleaning

Troubleshooting

Problem Checklist

Checklist of common problems and solutions before calling service.

Error Notes

Explanation of error codes and how they are displayed.

E1, E2, & E3 Flowchart

Troubleshooting flowchart for specific error codes.

E4, E5, & E6 Flowchart

Troubleshooting flowchart for specific error codes.

E7, E8, & E9 Flowchart

Troubleshooting flowchart for specific error codes.

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