Hoshizaki AM-50BAJ Bedienungsanleitung

Models

AM-50BAJ

AM-50BAJ-DS

AM-50BAJ-AD

AM-50BAJ-ADDS

Self-Contained Cuber

Service Manual

Number: 73218

Issued: 12-18-2017

Revised: 5-30-2018

hoshizakiamerica.com

WARNING

Only qualied service technicians should install and service the appliance. To

obtain the name and phone number of your local Hoshizaki Certied Service

Representative, visit www.hoshizaki.com. No service should be undertaken until

the technician has thoroughly read this Service Manual. Failure to service and

maintain the appliance in accordance with this manual will adversely affect safety,

performance, component life, and warranty coverage and may result in costly water

damage. Proper installation is the responsibility of the installer. Product failure or

property damage due to improper installation is not covered under warranty.

Hoshizaki provides this manual primarily to assist qualied service technicians in the

service of the appliance.

Should the reader have any questions or concerns which have not been satisfactorily

addressed, please call, send an e-mail message, or write to the Hoshizaki Technical

Support Department for assistance.

Phone: 1-800-233-1940; (770) 487-2331

Fax: 1-800-843-1056; (770) 487-3360

E-mail: [email protected]

618 Highway 74 South

Peachtree City, GA 30269

Attn: Hoshizaki Technical Support Department

Web Site: www.hoshizaki.com

NOTE: To expedite assistance, all correspondence/communication MUST include the

following information:

• Model Number

• Serial Number

• Complete and detailed explanation of the problem.

CONTENTS

Important Safety Information ................................................................................................. 4

I. Construction and Water/Refrigeration Circuit Diagram ....................................................... 7

A. Construction.................................................................................................................. 7

B. Water/Refrigeration Circuit Diagram.............................................................................. 8

II. Sequence of Operation and Service Diagnosis................................................................. 9

A. Sequence of Operation Flow Chart............................................................................... 9

B. Service Diagnosis ....................................................................................................... 10

C. Bin Control Check ....................................................................................................... 14

D. Thermistor Check ........................................................................................................ 15

E. Diagnostic Tables ........................................................................................................ 16

III. Control Board.................................................................................................................. 19

A. Control Board Layout .................................................................................................. 20

B. Settings and Adjustments............................................................................................ 21

C. LED Lights .................................................................................................................. 22

D. Control Switch ............................................................................................................. 22

IV. Refrigeration Circuit and Component Service Information.............................................. 23

A. Refrigeration Circuit Service Information .................................................................... 23

B. Component Service Information.................................................................................. 25

V. Maintenance .................................................................................................................... 26

A. Maintenance Schedule................................................................................................ 26

B. Optional Drain Pump HS-5061.................................................................................... 27

VI. Preparing the Icemaker for Periods of Non-Use ............................................................. 28

VII. Disposal......................................................................................................................... 29

VIII. Technical Information.................................................................................................... 30

A. Specication and Performance Data........................................................................... 30

1. AM-50BAJ(-DS) ..................................................................................................... 30

2. AM-50BAJ-AD(ADDS)........................................................................................... 31

B. Wiring Diagrams.......................................................................................................... 32

1. AM-50BAJ(-DS)(-AD)(-ADDS) ............................................................................... 32

2. HS-5061 Optional Drain Pump .............................................................................. 33

IMPORTANT

This manual should be read carefully before the appliance is serviced. Read

the warnings and guidelines contained in this manual carefully as they provide

essential information for the continued safe use, service, and maintenance of the

appliance. Retain this manual for any further reference that may be necessary.

Important Safety Information

Throughout this manual, notices appear to bring your attention to situations which could

result in death, serious injury, damage to the appliance, or damage to property.

WARNING Indicates a hazardous situation which could result in death or

serious injury.

NOTICE Indicates a situation which could result in damage to the

appliance or property.

IMPORTANT Indicates important information about the use and care of the

appliance.

WARNING

The appliance should be destined only to the use for which it has been expressly

conceived. Any other use should be considered improper and therefore dangerous.

The manufacturer cannot be held responsible for injury or damage resultingfrom

improper, incorrect, and unreasonable use. Failure to service and maintain the

appliance in accordance with this manual will adversely affect safety, performance,

component life, and warranty coverage and may result in costly water damage.

To reduce the risk of death, electric shock, serious injury, or re, follow basic

precautions including the following:

• Only qualied service technicians should install and service the appliance.

• The appliance must be installed in accordance with applicable national, state, and

local codes and regulations. Failure to meet these code requirements could result in

death, electric shock, serious injury, re, or damage.

• To reduce the risk of electric shock, do not touch the control switch or plug with

damp hands.

• Make sure the control switch is in the "OFF" position before plugging in or

unplugging the appliance.

• Before servicing, move the control switch to the "OFF" position. Unplug the

appliance from the electrical outlet.

• The appliance requires an independent power supply of proper capacity. See the

nameplate for electrical specications. Failure to use an independent power supply

of proper capacity can result in a tripped breaker, blown fuse, damage to existing

wiring, or component failure. This could lead to heat generation or re.

• THE APPLIANCE MUST BE GROUNDED: The appliance is equipped with a

NEMA5-15 three-prong grounding plug to reduce the risk of potential shock

hazards. It must be plugged into a properly grounded, independent 3-prong wall

outlet. If the outlet is a 2-prong outlet, it is your personal responsibility to have

a qualied electrician replace it with a properly grounded, independent 3-prong

wall outlet. Do not remove the ground prong from the power cord and do not use

an adapter plug. Failure to properly ground the appliance could result in death or

serious injury.

• The GREEN ground wire in the factory-installed power cord is connected to the

appliance. If it becomes necessary to remove or replace the power cord, be sure

to connect the power cord's ground wire.

WARNING, continued

• Do not make any alterations to the appliance. Alterations could result in electric

shock, serious injury, re, or damage.

• Do not use an extension cord.

• Do not use an appliance with a damaged power cord. The power cord should not

be altered, jerked, bundled, weighed down, pinched, or tangled. Such actions could

result in electric shock or re. To unplug the appliance, be sure to pull the plug, not

the cord, and do not jerk the cord.

• 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 or instruction concerning use of the

appliance by a person responsible for their safety.

• Children should be properly supervised around this appliance.

• Do not climb, stand, or hang on the appliance or appliance door or allow children or

animals to do so. Do not climb into the appliance or allow children or animals to do

so. Death or serious injury could occur or the appliance could be damaged.

• Be careful not to pinch ngers when opening and closing the door. Be careful when

opening and closing the door when children are in the area.

• Open and close the door with care. Door opened too quickly or forcefully may

cause injury or damage to the appliance or surrounding equipment.

• Do not use combustible spray or place volatile or ammable substances near the

appliance They might catch re.

• Keep the area around the appliance clean. Dirt, dust, or insects in the appliance

could cause harm to individuals or damage to the appliance.

• Do not place anything on top of the appliance. Foreign objects or moisture could

enter the appliance and result in electric shock or re.

NOTICE

• Protect the oor when moving the appliance to prevent damage to the oor.

• When making water supply or drain line repairs, follow the requirements found in the

instruction manual to reduce the risk of costly water damage.

• In areas where water damage is a concern, conrm appliance is installed in a

contained area with a oor drain.

• Conrm the appliance is in a location that stays above freezing. Normal operating

ambient temperature must be within 45°F to 100°F (7°C to 38°C).

• If using the optional drain pump (HS-5061), test its operation every time the

appliance is cleaned and sanitized. See "V.B. Optional Drain Pump HS-5061" for

details. If the optional drain pump is not operating properly, water could back up and

overow, leading to costly water damage.

• If water collects in the bin and will not drain, turn off the appliance and close the

water supply line shut-off valve.

• If water seeps from the base of the appliance, turn off the appliance and close the

water supply line shut-off valve. Failure to do so could lead to costly water damage.

• Do not leave the appliance on during extended periods of non-use, extended

absences, or in sub-freezing temperatures. To properly prepare the appliance for

these occasions, follow the instructions in "VI. Preparing the Appliance for Periods

of Non-Use."

• Keep ventilation openings, in the appliance enclosure or in the built-in structure,

clear of obstruction.

• Do not place objects on top of the appliance.

• The ice storage bin is for ice use only. Do not store anything else in the ice storage

bin.

I. Construction and Water/Refrigeration Circuit Diagram

A. Construction

Top Panel

Ice Making

Mechanism

Scoop Holder

Front Panel

Control Switch

Louver

Bin Control

Thermostat

Bulb

Slope

Magnet

Catch

Door

Power Cord

B. Water/Refrigeration Circuit Diagram

Inlet Water Valve

Pump

Motor Water Tank

Evaporator

Capillary Tube

Accumulator

Ice Storage Bin

Hot Gas

Valve

Compressor

Condenser

Drier

Fan

Water Circuit

Refrigeration Circuit

Spray Assembly

Ice Chute

Strainer

Thermistor

To Drain

Heat Exchanger

II. Sequence of Operation and Service Diagnosis

A. Sequence of Operation Flow Chart

Components Energized when the Control Switch is in the "WASH" Position

The "WASH" position on the control switch is used when cleaning and sanitizing the icemaker. When in the "WASH" position,

power is supplied to the pump motor and fan motor. The cleaner and sanitizer ow over the evaporator plate assembly.

Legend:

BC–bin control

BCH–bin control heater

Comp–compressor

DP–drain pump (optional)

FM–fan motor

FT–freeze timer

FTT–freeze termination timer

HGV–hot gas valve

HT–harvest timer

PM–pump motor

WV–inlet water valve

WVT–inlet water valve timer

3-min. FT

incontrol

AM-50BAJ Series Sequence Flow Chart

1. Initial

Harvest

Cycle

Cycle Steps 2. Initial Freeze Cycle

• WV continues for 52 sec. during initial freeze.

• 3-min. FT resets if temperature rises above

27°F (-3°C) during 3-min. FT.

Thermistor

in control

3. Normal Harvest Cycle

• WV time: 102 sec. or the

length of harvest, whichever

is shorter.

BCH energized

Comp energized

HGV energized

WV energized

Thermistor drops to

27°F (-3°C)

(6.8 kΩ or more).

3-min. FT starts.

BCH continues

Comp continues

FM de-energized

PM de-energized

HGV energized

WV energized

Startup

Thermistor

in control

BCH continues

Comp continues

FM energized

PM energized

HGV de-energized

50-sec.

Thermistor temperature

reaches 45°F (7°C)

(4.5 kΩ or less).

50 sec. HT starts.

50-sec.

HT in

control

1. Bin Full

Within 10 sec. after ice

contacts thermostatic

bulb, appliance shuts

down.

Shutdown andRestart

BC Operation

Ice contacts

thermostatic bulb

BC open

All components

de-energized except

BCH and DP

2. Icemaker Off

All components

de-energized.

3. Ice Level Lowered

No ice touching

thermostatic bulb.

Icemaker starts at

"1. Initial Harvest Cycle."

To 1 above

BC closed

4. Normal Freeze Cycle

• 3-min. FT resets if temperature rises above

27°F (-3°C) during 3-min. FT.

5-min. FTT

incontrol

If thermistor stays

below 27°F (-3°C),

3-min. freeze timer

terminates and

5-min FTT starts.

Otherwise, 3-min. FT

restarts. BCH continues

Comp continues

FM energized

PM energized

HGV de-energized

WV de-energized

102-sec.

WVT 52-sec.

3-min. FT

incontrol

Thermistor

in control

5-min. FTT

incontrol

Thermistor drops to

27°F (-3°C)

(6.8 kΩ or more).

3-min. FT starts.

If thermistor stays

below 27°F (-3°C),

3-min. freeze timer

terminates and

5-min FTT starts.

Otherwise, 3-min. FT

restarts.

102-sec.

WVT

B. Service Diagnosis

WARNING

• The appliance should be diagnosed and repaired only by qualied service

personnel to reduce the risk of death, electric shock, serious injury, or re.

• Risk of electric shock. Use extreme caution and exercise safe electrical practices.

• Risk of electric shock. Control switch in "OFF" position does not de-energize all

loads (optional drain pump).

• Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.

• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are

securely in place after the appliance is serviced. Make sure that none have fallen

into the ice storage bin.

• Make sure all food zones in the appliance are clean after service.

The diagnostic procedure is a sequence check that allows you to diagnose the electrical

system and components. Before proceeding, check for correct installation, proper voltage

per nameplate, and adequate water supply.

Note: • When checking high-voltage (115VAC), always choose a white (W) neutral wire to

establish a good neutral connection.

• When checking low-voltage (24VAC) (auxiliary code C-1 and later), always

choose a light blue (LBU) neutral wire to establish a good neutral connection.

• When checking component voltage from CB, pull CB connectors out slightly to

allow room for multimeter test leads contact.

• BCH energizes at startup and continues until the control switch is turned off or

power is disconnected.

• Optional drain pump (HS-5061) has 115VAC power supply as soon as the

appliance is plugged into the electrical outlet.

1) Access the control box and move the control switch to the "OFF" position.

2) Clear any ice from BC.

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