MULTIPLEX MB-8-1 Technician's Handbook

Multiplex

Technician’s

Handbook

This manual is updated as new information and models are released. Visit

our website for the latest manual. www.manitowocfsg.com

Leader in Ice & Beverage Dispensers

Blended

Beverage System

Part Number STH034 3/12

Safety Notices

As you work on Multiplex equipment, be sure to pay

close attention to the safety notices in this handbook.

Disregarding the notices may lead to serious injury

and/or damage to the equipment.

Throughout this handbook, you will see the following

types of safety notices:

Procedural Notices

As you work on Multiplex equipment, be sure to read

the procedural notices in this handbook. These notices

supply helpful information which may assist you as

you work.

Throughout this handbook, you will see the following

types of procedural notices:

!

Warning

Text in a Warning box alerts you to a potential

personal injury situation. Be sure to read the

Warning statement before proceeding, and work

carefully.

!

Caution

Text in a Caution box alerts you to a situation in

which you could damage the equipment. Be sure

to read the Caution statement before proceeding,

and work carefully.

Important

Text in an Important box provides you with

information that may help you perform a

procedure more efficiently. Disregarding this

information will not cause damage or injury, but it

may slow you down as you work.

NOTE: Text set off as a Note provides you with simple,

but useful, extra information about the procedure you

are performing.

Read These Before Proceeding:

!

Caution

Proper installation, care and maintenance are

essential for maximum performance and trouble-

free operation of your Multiplex equipment. If you

encounter problems not covered by this

handbook, do not proceed, contact Manitowoc

Foodservice. We will be happy to provide

assistance.

Important

Routine adjustments and maintenance

procedures outlined in this handbook are not

covered by the warranty.

! Warning

PERSONAL INJURY POTENTIAL

Do not operate equipment that has been

misused, abused, neglected, damaged, or

altered/modified from that of original

manufactured specifications.

! Warning

PERSONAL INJURY POTENTIAL

Failure to follow instructions in this manual can

cause property damage, injury or death.

We reserve the right to make product

improvements at any time. Specifications and

design are subject to change without notice.

! Warning

Do not store gasoline or other flammable vapors

or liquids in the vicinity of this or any other

appliance.

!

Warning

This appliance is not to be played with. Unless all

cover and access panels are in place and

properly secured, do not operate the equipment.

! Warning

Do not clean with water jet.

! Warning

Read this manual thoroughly before operating,

installing or performing maintenance on the

equipment.

Part Number STH034 3/12 5

Table of Contents

General Information

Model Numbers . . . . . . . . . . . . . . . . . . . . . 11

Model/Serial Number Location . . . . . . . . 11

Warranty Information . . . . . . . . . . . . . . . . 13

Owner Warranty Registration Card . . . 13

Commercial Warranty Coverage . . . . . . . 13

Limited Warranty For Multiplex Blended 

Ice Machine . . . . . . . . . . . . . . . . . . . . . 13

Installation

General . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . 24

Location . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Clearances . . . . . . . . . . . . . . . . . . . . . 28

Heat of Rejection . . . . . . . . . . . . . . . . . 28

Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . 29

General . . . . . . . . . . . . . . . . . . . . . . . . 29

Minimum Circuit Ampacity . . . . . . . . . . 29

Electrical Requirements . . . . . . . . . . . 29

Minimum Circuit Amperage Chart . . . . 30

Grounding Instructions . . . . . . . . . . . . 32

Bonding Instructions 230-240V 50 Hz 

Models only . . . . . . . . . . . . . . . . . . . . . 32

6 Part Number STH034 3/12

Water Supply and Drain Requirements . 34

Water Supply . . . . . . . . . . . . . . . . . . . 34

Water Inlet lines . . . . . . . . . . . . . . . . . 34

Drain Connections . . . . . . . . . . . . . . . 35

CO2 Requirements . . . . . . . . . . . . . . . . . 35

Step-by-Step Installation . . . . . . . . . . . . . 36

Installation Checklist . . . . . . . . . . . . . . . . 39

MenuConnect . . . . . . . . . . . . . . . . . . . . . . 40

Start-Up Procedures . . . . . . . . . . . . . . . . 40

Loading Recipes . . . . . . . . . . . . . . . . . 40

Assigning Flavors . . . . . . . . . . . . . . . . 40

Loading Bags . . . . . . . . . . . . . . . . . . . 41

Calibration Procedure . . . . . . . . . . . . . . . 41

Maintenance

General Maintenance . . . . . . . . . . . . . . . . 45

Door Gasket Maintenance . . . . . . . . . 45

Drain Maintenance - Base . . . . . . . . . 45

Caster Maintenance . . . . . . . . . . . . . . 46

Refrigerators . . . . . . . . . . . . . . . . . . . . 46

Stainless Steel Care and Cleaning . . . 46

Cleaning the Condenser Coil . . . . . . . 48

Doors/Hinges . . . . . . . . . . . . . . . . . . . 49

Preventing Blower Coil Corrosion . . . . 49

Annual Planned Maintenance . . . . . . 49

Cleaning Kits . . . . . . . . . . . . . . . . . . . 50

Daily Cleaning . . . . . . . . . . . . . . . . . . . . . 51

Weekly Cleaning . . . . . . . . . . . . . . . . . . . 56

Ice Machine Cleaning . . . . . . . . . . . . . . . 67

Version 1 Ice Machine R404A Refrigerant

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Version 2 Ice Machines R404a or R290 

Refrigerant . . . . . . . . . . . . . . . . . . . . . 72

Part Number STH034 3/12 7

Operation

Touch Screens . . . . . . . . . . . . . . . . . . . . . 77

Manager Screens . . . . . . . . . . . . . . . . . . . 78

Recommended Cups . . . . . . . . . . . . . . . . 81

Procedure to Make a Drink . . . . . . . . . . . 82

Procedure to Replace a Product Bag . . . 85

Firmware Update Procedure . . . . . . . . . . 88

Ice Making Sequence of Operation . . . . . 90

Version 1 Ice Machine R404A Refrigerant

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Version 2 Ice Machines R404A or R290 

Refrigerant . . . . . . . . . . . . . . . . . . . . . 92

Product Dispense Operation . . . . . . . . . . 93

Operation . . . . . . . . . . . . . . . . . . . . . . 93

Refrigerated Cabinet Operation . . . . . . . 94

Normal Operation . . . . . . . . . . . . . . . . 94

Evaporator and Condenser Fan Motor 

Operation . . . . . . . . . . . . . . . . . . . . . . 94

Operation in the Clean/Sanitize cycle . 95

Adaptive Defrost . . . . . . . . . . . . . . . . . 95

High Temp Alarm . . . . . . . . . . . . . . . . 95

Thermistor Failure . . . . . . . . . . . . . . . . 95

8 Part Number STH034 3/12

Troubleshooting

Control System . . . . . . . . . . . . . . . . . . . . 97

Will Not Run Diagnostics . . . . . . . . . . 97

Beverage System . . . . . . . . . . . . . . . . . . . 99

Procedure to Clear Blocked Line . . . . 99

Beverage System Diagnostics . . . . . . 102

Ice System . . . . . . . . . . . . . . . . . . . . . . . . 103

Before Beginning Service . . . . . . . . . . 103

Installation/Visual Inspection Checklist 103

Water System Checklist . . . . . . . . . . . 104

Ice Production/Quality Check . . . . . . . 105

Version 1 Ice Machine R404A Refrigerant

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Version 2 Ice Machine R290 Refrigerant

Electrical Troubleshooting Flowchart . 111

Refrigerated Cabinet . . . . . . . . . . . . . . . . 116

Reach-in temperature Out of Range - Check

Refrigeration System and Door Seal. . 120

High Product Temperature - Check Duct

Cooling Fan . . . . . . . . . . . . . . . . . . . . 120

Refrigeration System Diagnostics . . . . . 121

Analyzing Discharge Pressure or 

Temperature . . . . . . . . . . . . . . . . . . . . 121

Analyzing Suction Pressure or Temperature

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Analyzing Discharge Pressure or 

Temperature . . . . . . . . . . . . . . . . . . . . 125

Analyzing Suction Pressure or Temperature

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Part Number STH034 3/12 9

Component Check Procedures

Control System . . . . . . . . . . . . . . . . . . . . . 129

ON/Off Rocker Switch . . . . . . . . . . . . . 129

Power Relay . . . . . . . . . . . . . . . . . . . . 130

Transformer . . . . . . . . . . . . . . . . . . . . . 131

LCD Touchscreen & Control Board . . . 132

Beverage Components . . . . . . . . . . . . . . 133

Pressure Regulator - Water or CO2 . . 133

Water Dispense Solenoid Valve . . . . . 134

Syrup Solenoid Valve . . . . . . . . . . . . . 135

Product Pump . . . . . . . . . . . . . . . . . . . 136

Step Motor . . . . . . . . . . . . . . . . . . . . . . 137

Blender Motor . . . . . . . . . . . . . . . . . . . 138

Home Position Switch . . . . . . . . . . . . . 139

Door Switch . . . . . . . . . . . . . . . . . . . . . 140

Water Rinse Solenoid Valve . . . . . . . . 141

Ice Machine Components . . . . . . . . . . . . 142

Version 1 Ice Machine R404A Refrigerant -

Solid State Timer . . . . . . . . . . . . . . . . . 142

Version 1 Ice Machine R404A Refrigerant -

Solid State Time Delay Relay . . . . . . . 146

Version 1 Ice Machine R404A Refrigerant -

Float Switch/Water Control Relay . . . . 147

High Pressure Cutout (HPCO) Control 148

Infrared Ice Bin Control - All Models . . 149

Refrigerated Cabinet . . . . . . . . . . . . . . . . 150

Temperature Thermistor - Nozzle, Cabinet

or Defrost . . . . . . . . . . . . . . . . . . . . . . 150

Evaporator Fan Motor . . . . . . . . . . . . . 152

Chase Fan Motor . . . . . . . . . . . . . . . . 153

Condenser Fan Motor . . . . . . . . . . . . . 154

Compressor Electrical Diagnostics . . . . 155

The compressor does not start or will trip re-

peatedly on overload . . . . . . . . . . . . . . 155

Compressor Drawing Locked Rotor . . 156

Diagnosing Capacitors . . . . . . . . . . . . 156

Filter-Driers . . . . . . . . . . . . . . . . . . . . . . . . 157

10 Part Number STH034 3/12

Charts

Total System Refrigerant Charge . . . . . . 159

Operational Charts . . . . . . . . . . . . . . . . . 160

R404A Refrigerant - Refrigerated Cabinet

Operating Pressures . . . . . . . . . . . . . . 160

Version 1 Ice Machine R404A Refrigerant -

Ice Machine Performance Chart . . . . . 161

Version 2 Ice Machine - R290 Refrigerant

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Diagrams

Wiring Diagrams . . . . . . . . . . . . . . . . . . . 163

Version 1 Ice Machine R404A Refrigerant -

Control System Wiring Diagram . . . . 165

Version 1 Ice Machine R404A Refrigerant -

Ice Maker & Ice Dispenser Wiring Diagram

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Version 1 Ice Machine R404A Refrigerant -

Ice Maker Wiring Diagram . . . . . . . . . 168

Version 1 Ice Machine R404A Refrigerant -

Ice Machine Wiring Diagram . . . . . . . 169

Version 1 Ice Machine R404A Refrigerant -

Ice Machine Logic Diagram . . . . . . . . 170

Version 2 Ice Machine R290 Refrigerant -

Control System Wiring Diagram . . . . . 172

Version 2 Ice Machine R290 Refrigerant -

Refrigeration Cabinet Wiring Diagram 173

Version 2 Ice Machine R290 Refrigerant -

Ice Maker & Ice Dispenser Wiring Diagram

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Version 2 Ice Machine R290 Refrigerant -

Ice Maker Wiring Diagram . . . . . . . . . 175

Water and Refrigeration Circuit Version 1 Ice

Machine R404A Refrigerant . . . . . . . . . . 176

Part Number STH034 3/12 11

General Information

Model Numbers

This manual covers the following models:

Model/Serial Number Location

These numbers are required when requesting

information from your local Multiplex Distributor,

service representative, or Manitowoc Foodservice.

The model and serial number are listed on the

OWNER WARRANTY REGISTRATION CARD. They

are also listed on the MODEL/SERIAL NUMBER

DECAL affixed to the machine.

Blend-In-Cup Beverage Systems

MB-8-1, MB-8-2, MB-8-1E,

MB-8-2E, MB-8-1A, MB-8-2A, MB-8-1D,

MB-8-2D, MB-8-1U, MB-8-2U, MB-8-1P,

MB-8-2P, MB000A01, MB000A02

MB000A03, MB000A04, MB000A05

! Warning

Some 50 hz models may contain up to 15 grams of

R290 (propane) refrigerant. R290 (propane) is

flammable in concentrations of air between

approximately 2.1% and 9.5% by volume (LEL lower

explosion limit and UEL upper explosion limit). An

ignition source at a temperature higher than 470°C

is needed for a combustion to occur. Refer to

nameplate to identify the type of refrigerant in your

equipment. Only trained and qualified personnel

aware of the dangers are allowed to work on the

equipment.

12 Part Number STH034 3/12

.

! Warning

Personal Injury Potential - Do not operate equipment

that has been misused, abused, neglected,

damaged, or altered/modified from that of original

manufactured specifications. This appliance is not

intended for use by persons (including children) with

reduced physical, sensory or mental capabilities, or

lack of experience and knowledge, unless they have

been given supervision concerning use of the

appliance by a person responsible for their safety.

Do not allow young children to play with the

appliance.

!

Warning

Do not use electrical appliances or accessories

other than those supplied by Multiplex for your

model.

!

Warning

Do not damage the refrigeration circuit when

installing, maintaining or servicing the unit.

! Warning

Only trained and qualified personnel aware of the

dangers of refrigerant and carbon dioxide under

pressure, electrical shock, and incorrect lifting/

moving hazards, should install, maintain or

service this equipment.

! Warning

Two or more people or a lifting device are

required to lift this appliance.

Part Number STH034 3/12 13

Warranty Information

OWNER WARRANTY REGISTRATION CARD

Warranty coverage begins the day the Blend-In-Cup

Beverage System is installed.

If the OWNER WARRANTY REGISTRATION CARD is

not returned, Manitowoc Foodservice will use the date

of sale to the Multiplex Distributor as the first day of

warranty coverage for your new Blend-In-Cup

Beverage System.

Commercial Warranty Coverage

LIMITED WARRANTY FOR MULTIPLEX BLENDED

ICE MACHINE

Manitowoc Beverage Systems, a division of

Manitowoc FSG Operations, LLC, (“Company”)

warrants to the original end-user (“Owner”) for a period

of one (1) year from the installation date (except as

limited below) that this new Multiplex Blended Ice

machine manufactured by the Company (the

“Machine”) shall be free of defects in material or

workmanship under normal and proper use and

maintenance as specified by the Company and upon

proper installation and start-up in accordance with the

instruction/use and care manual supplied with the

machine.

Continued on next page …

Important

Complete and mail the OWNER WARRANTY

REGISTRATION CARD as soon as possible to

validate the installation date.

14 Part Number STH034 3/12

The Company's warranty hereunder with respect to

compressors shall apply for an additional forty-eight

months, excluding all labor charges.

The Company's warranty hereunder with respect to

any blender assembly shall apply for one year or

13,000 blender cycles, whichever occurs first,

including labor. At 13,000 blender cycles a blender

assembly preventative maintenance (PM) service is

required. It is the responsibility of the Owner to

complete and pay for this PM. If the blender assembly

has accrued 13,000 cycles prior to expiration of the

initial one year warranty period, then once the PM is

completed in compliance with the instruction manual,

the warranty will continue to be valid for the remainder

of the one year warranty period or accumulation of

another 13,000 cycles, whichever occurs first.

During the warranty period, the Company shall, at

Company's option, repair or replace parts,

components or assemblies determined by the

Company to be defective in material or workmanship.

This warranty is further limited to the cost of parts,

components or assemblies and standard straight time

labor charges at the servicing location.

Part Number STH034 3/12 15

Time and hourly rate schedules, as published from

time to time by the Company, apply to all service

procedures. Additional expenses including without

limitation, travel time, overtime premium, material cost,

accessing or removal of the machine, or shipping are

the responsibility of the Owner, along with all

maintenance, adjustments, cleaning, and ice or other

purchases. Labor covered under this warranty must be

performed by a Company Contracted Service

Representative or a service agency as qualified and

authorized by the Company's local distributor. The

Company's liability under this warranty shall in no

event be greater than the actual purchase price paid

by Owner for the Machine.

The foregoing shall be the sole obligation of the

Company under this Limited Warranty with respect to

the Machine and any related products and services.

With respect to equipment, materials, parts and

accessories manufactured by others, Company's sole

obligation shall be to use reasonable efforts to obtain

the full benefit of the manufacturer's warranties.

Company shall have no liability, whether in contract,

tort, negligence, or otherwise, with respect to non-

Company manufactured products.

Continued on next page …

16 Part Number STH034 3/12

Who Is Covered

This Limited Warranty is available only to the original

end user of the product and is not transferable.

Exclusions From Coverage

This warranty shall not apply to:

• Any part or assembly that has been altered,

modified, or changed.

• Repair or replacement of parts or assemblies

required because of misuse, abuse, improper care

or storage, negligence, alteration, accident, use of

incompatible supplies or lack of specified

maintenance.

• Normal maintenance items, including but not

limited to, light bulbs, fuses, containers, gaskets,

LMS Valves or product stickers used in the unit, O-

rings, interior and exterior finishes, lubrication, de-

liming, broken glass, etc.

• Improper or unauthorized repair.

• Failures caused by improper or erratic voltages.

• Any parts subject to damage beyond the control of

Company, or to equipment which has been subject

to alteration, misuse or improper installation,

accidents, damage in shipment, fire, floods, power

changes, other hazards or acts of God that are

beyond the control of Company.

Part Number STH034 3/12 17

• Any machine that has been installed and/or

maintained inconsistent with the technical

instructions provided by the Company.

• Any machine initially installed more than five years

from the serial number production date.

• Any products or equipment manufactured or sold

by Company when such products or commercial

equipment is installed or used in a residential or

non-commercial application. Installations not

within the applicable building or fire codes render

this Limited Warranty and any responsibility or

obligations associated therein null and void. This

includes any damage, costs or legal actions

resulting from the installation of any Company

equipment in a non-commercial application or

installation, where the equipment is being used for

applications other than those approved for by

Company.

• Any product cleaned without using an approved

Company cleaning solution shall void this Limited

Warranty.

• This warranty shall not apply if the Machine's

refrigeration system is modified with a condenser,

heat reclaim device, or parts and assemblies other

than those manufactured by the Company, unless

the Company approves these modifications for

specific locations in writing.

Continued on next page …

18 Part Number STH034 3/12

Limitations Of Liability

The preceding paragraphs set forth the exclusive

remedy for all claims based on failure of, or defect in,

products or services sold hereunder, whether the

failure or defect arises before or during the warranty

period, and whether a claim, however instituted, is

based on contract, indemnity, warranty, tort (including

negligence), strict liability, implied by statute, common-

law or otherwise, and Company its servants and

agents shall not be liable for any claims for personal

injuries or consequential damages or loss, howsoever

caused. Upon the expiration of the warranty period, all

such liability shall terminate. THE FOREGOING

WARRANTIES ARE EXCLUSIVE AND IN LIEU OF

ALL OTHER WARRANTIES, WHETHER WRITTEN,

ORAL, IMPLIED OR STATUTORY. NO IMPLIED

WARRANTY OF MERCHANTABILITY OR FITNESS

FOR PARTICULAR PURPOSE SHALL APPLY.

COMPANY DOES NOT WARRANT ANY PRODUCTS

OR SERVICES OF OTHERS.

Part Number STH034 3/12 19

Remedies

The liability of Company for breach of any warranty

obligation hereunder is limited to: (i) the repair or

replacement of the Machine on which the liability is

based, or with respect to services, re-performance of

the services; or (ii) at Company's option, the refund of

the amount paid for said Machine or services. Any

breach by Company with respect to any item or unit of

equipment or services shall be deemed a breach with

respect to that item or unit or service only.

Warranty Claim Procedure

Customer shall be responsible to:

• Immediately advise the Company's Authorized

Service Agent of the equipment serial number and

the nature of the problem.

• Verify the problem is a factory responsibility.

• Cooperate with the Service Agency so that

warranty service may be completed during normal

working hours.

To secure prompt and continuing warranty service, the

warranty registration card must be completed and sent

to the COMPANY within five (5) days from the

installation date.

Continued on next page …

20 Part Number STH034 3/12

Governing Law

For equipment, products and services sold in the

United States this Limited Warranty shall be governed

by the laws of the state of Delaware, USA, excluding

their conflicts of law principles. The United Nations

Convention on Contracts for the International Sale of

Goods is hereby excluded in its entirety from

application to this Limited Warranty.

Manitowoc Beverage Systems,

Complete the following and retain for your record:

Distributor/Dealer___________________________

Model Number_____________________________

Serial Number______________________________

Installation Date____________________________

General Conditions

Multiplex shall not be liable in any manner for any

default or delay in performance hereunder caused by

or resulting from any contingency beyond Multiplex’s

control, including, but not limited to, war, governmental

restrictions or restraints, strike, lockouts, injunctions,

fire, flood, acts of nature, short or reduced supply of

raw materials, or discontinuance of any part or the

Motor-Compressor by the unit manufacturer.

Replacement of a defective Motor-Compressor is

limited to one (1) Motor-Compressor by us during the

four (4) year period. Multiplex shall replace the Motor-

Compressor at no charge.

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MULTIPLEX MB-8-1 Technician's Handbook

MULTIPLEX MB-8-1 Technician's Handbook

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