Hoshizaki KMS2000MLJ User Manual

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Service Manual

Modular Crescent Cuber Serenity Series

Model KMS-2000MLJ

Including Condensing Unit Models SRK-20J/3

hoshizakiamerica.com

Number: 73225 Issued: 6-15-2018

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 installation or service should be undertaken until the technician has thoroughly read this Service Manual. Likewise, the owner/manager should not proceed to operate the appliance until the installer has instructed them on its proper operation. Failure to install, operate, 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 installation, maintenance, and 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: techsupport@hoshizaki.com

618 Highway 74 South Peachtree City, GA 30269 Attn: Hoshizaki Technical Support Department

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

following information:

• Model Number

• Serial Number

• Complete and detailed explanation of the problem.

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.

CONTENTS

Important Safety Information ................................................................................................. 5

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

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

1. Icemaker .................................................................................................................. 7

2. Condensing Unit ..................................................................................................... 8

B. Water Circuit and Refrigeration Circuit .......................................................................... 9

II. Sequence of Operation and Service Diagnosis ............................................................... 10

A. Sequence of Operation Flow Chart ............................................................................. 10

1. Operation Flow Chart ............................................................................................ 10

2. Shutdown Flow Chart .............................................................................................11

3. Freeze-Time Correction Chart ............................................................................... 12

B. Service Diagnosis ....................................................................................................... 13

C. Freeze-Time Correction Cycle (90 min.) ..................................................................... 20

D. Control Board Check ................................................................................................... 22

E. Bin Control Check ....................................................................................................... 24

F. Float Switch Check and Cleaning ................................................................................ 26

G. Thermistor Check ........................................................................................................ 28

H. Switches ...................................................................................................................... 29

1. Control Switch ........................................................................................................ 29

2. Service Switch ....................................................................................................... 29

I. Diagnostic Tables .......................................................................................................... 30

J. Freeze-Up Check List .................................................................................................. 34

III. Controls and Adjustments ............................................................................................... 35

A. Control Board Layout .................................................................................................. 36

B. LED Lights and Audible Alarm Safeties ....................................................................... 37

C. Settings and Adjustments ............................................................................................ 38

1. Default Dip Switch Settings .................................................................................... 38

2. Harvest Timer (S4 dip switch 1 & 2) ...................................................................... 39

3. Pump-Out Timer/Harvest Time During Pump-Out (S4 dip switch 3 & 4) ............... 39

4. Pump-Out Frequency Control (S4 dip switch 5) ..................................................... 40

5. Harvest Pump Time (Harvest Assist Duration) (S4 dip switch 6) ........................... 40

6. Harvest Pump Time (Harvest Assist)/Freeze-Time Correction (S4 dip switch 7) ... 41

7. Factory Use (S4 dip switch 8)................................................................................. 42

8. Freeze Timer (S4 dip switch 9 & 10) ...................................................................... 42

9. Float Switch Control Selector (S5 dip switch 1) ..................................................... 42

10. Rell Counter (S5 dip switch 2 and 3) .................................................................. 43

11. Minimum Harvest Time (S5 dip switch 4) ............................................................. 43

12. Anti-Slush (S5 dip switch 5) ................................................................................. 43

IV. Refrigeration Circuit and Component Service Information.............................................. 44

A. Refrigeration Circuit Service Information .................................................................... 44

B. Component Service Information .................................................................................. 47

V. Maintenance ................................................................................................................ 48

VI. Preparing the Appliance for Periods of Non-Use ........................................................ 49

VII. Disposal ......................................................................................................................... 51

VIII. Technical Information .................................................................................................... 52

A. Specication and Performance Data Sheets ............................................................... 52

1. KMS-2000MLJ with SRK-20J................................................................................. 52

2. KMS-2000MLJ with SRK-20J3 .............................................................................. 53

3. SRK-20J ................................................................................................................ 54

4. SRK-20J3 .............................................................................................................. 55

B. Wiring Diagrams .......................................................................................................... 56

1. Wire Harness Connections ..................................................................................... 56

2. KMS-2000MLJ with SRK-20J ................................................................................ 57

3. KMS-2000MLJ with SRK-20J3 .............................................................................. 58

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

This 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 this appliance.

• This 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 the appliance.

• To reduce the risk of electric shock, do not touch the control switch or service switch with damp hands.

• Before Servicing the KMS or SRK: To reduce the risk of electric shock, move the control switch to the "OFF" position and turn off the power supply to the SRK condensing unit. Place the KMS disconnect (if applicable) in the "OFF" position. Lockout/Tagout to prevent the power supply from being turned back on inadvertently.

• Do not make any alterations to the appliance. Alterations could result in electric shock, injury, re, or damage to the appliance.

• 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 allow children or animals to do so. Serious injury could occur or the appliance could be damaged.

• 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.

WARNING, continued

For KMS

• Power supply and ground connection are supplied from the SRK remote condensing

Failure to properly ground the appliance

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

unit via the wire harness provided. Do not connect the wire harness leads to an external power source.

• Wire harness routing (conduit) and disconnect (if required) must meet national, state, and local electrical code requirements. Failure to meet these code requirements could result in death, electric shock, serious injury, re, or damage to the appliance.

• THE APPLIANCE MUST BE GROUNDED. could result in death, serious injury, or damage to the appliance.

For SRK

• Electrical connection must be hard-wired and must meet national, state, and local electrical code requirements. Failure to meet these code requirements could result in death, electric shock, serious injury, re, or damage to the appliance.

• The remote condensing unit 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 fuses, damage to existing wiring, or component failure. This could lead to heat generation or re.

• THE REMOTE CONDENSING UNIT MUST BE GROUNDED. Failure to properly ground the remote condensing unit could result in death, serious injury, or damage to the appliance.

NOTICE

• Follow the instructions in this manual carefully to reduce the risk of costly water damage.

• In areas where water damage is a concern, install in a contained area with a oor drain.

• Install the appliance in a location that stays above freezing. Normal operating ambient temperature must be within 45°F to 100°F (7°C to 38°C).

• 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."

• Do not place objects on top of the appliance.

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

I. Construction and Water/Refrigeration Circuit Diagram

A. Construction

1. Icemaker

Top Panel

Top Insulation

Inlet Water Valve

Spray Guides

Spray Tubes

Insulation Panel

Evaporator

Wash Valve

Hot Gas Valve

Strainer

Suction Line Shutoff Valve

Thermostatic Expansion Valves

Front Panel

Control Switch

Service Switch

Fuse (KMS)

Control Box

Drain Valve

Switch Cover

Switch Mount

Extension Bracket

Bin Control

Control Box

Drier

Float Switch

Liquid Line Valve

Pump Motor

Bin Control

Liquid Line Shutoff Valve

Thermistor

Left Side Panel

Switch Bracket

2. Condensing Unit

Main Transformer (Three Phase Only)

Control Box

Suction Line Shutoff Valve

Liquid Line Shutoff Valve

Fan Motors

Liquid Line Shutoff Valve 2

High-Pressure Switch

Compressor

Crankcase Heater

Junction Box

Top Panel

Condenser

Right Side Panel

Louver Panel

Discharge Line Thermostat

Hot Gas Valves

Headmaster (C.P. R.)

Front Panel

Liquid Line Valve

Strainers

Left Side Upper Panel Right

Left Side Upper Panel

Accumulator

Receiver

Left Side Lower Panel

B. Water Circuit and Refrigeration Circuit

Hot Gas

Headmaster

(C.P. R.)

Discharge Line

Thermostat

Check Valve

Valves

Access Valve

Strainers

Liquid Line

Shutoff Valve 2

High-Pressure

Switch

Discharge

Line

Condenser

SRK-20J/3

Strainer

Fans

Liquid Line

Val ve

Suction Line

Wash Valve

Inlet Water Valve

Shutoff Valves

Liquid Line

Shutoff Valves

Heat Exchanger

Thermistor

Suction Line

Liquid Line

Val ve

Drier

Strainer

Hot Gas

Val ve

Accumulator

Check Valves

Float Switch

Compressor

Receiver

Thermostatic

Drain Valve

Expansion Valves

KMS-2000MLJ

Water Supply

Spray Tube

Evaporator

Drain

Pump Motor

Water Tank

II. Sequence of Operation and Service Diagnosis

A. Sequence of Operation Flow Chart

1. Operation Flow Chart

4. Pump-Out Cycle

3. Freeze Cycle

10th cycle.

• Factory set forevery

• Minimum freeze time: 5 min.

• Maximum freeze time: freeze timer setting

(S4 dip switch 5)

(S4 dip switch 9 & 10)

• Pump motor stops for

for 10/20 sec.

2 sec., then energized

(S4 dip switch 3 & 4)

FS in control

5-min. minimum

freeze timer in

control

Comp continues

FMRs continue

HGVs energized

DV energized

PM de-energizes for 2 sec.,

then energized for 10/20 sec.

LLVs de-energized

When freeze time differential exceeded,

freeze-time correction cycle starts.

See "II.A.3. Freeze-Time Correction Chart."

FS opens or freeze

timer terminates

50 sec.

FS closed

F/S check

Anti-Slush

Comp continues

Thermistor

FMRs continue

temperature

PM continues

drops to 36°F

LLVs energized

(2.2°C) (5.8 kΩ

HGVs de-energized

or more).

F/S open

PM de-energizes

for 10 sec.

Power is supplied to the pump motor and drain valve. This drains the water tank.

Power is supplied to the pump motor only. This operation can be used to circulate cleaner

and sanitizer over the outside surface of the evaporator for extended periods of time.

Power is supplied to the pump motor and wash valve. This operation is used to circulate

cleaner and sanitizer over both the inside and outside surfaces of the evaporator.

Operation Flow Chart

HarvestPump Timer

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

PM energized

F/S check

begins

here after

WV continues

WV energized

5-sec. delay

WV de-energized

Comp energized

Thermistor temperature

reaches 48°F (9°C)

FMRs energized

HGVs energized

F/S open

(3.9 kΩ or less)

Harvest timer starts.

If F/S is open, Comp and FMRs de-energize and cycle returns to 1-minute ll cycle

1 to 3-min. timer in control

(S4 dip switch 1 & 2)

HPT settings (S4 dip switch 6), whichever is

shorter.

• WV time: 6 min. or the length of harvest minus

• Maximum harvest time: 20 min.

2. Harvest Cycle

1. 1-Minute

Fill Cycle

Cycle

Steps

Thermistor

in control

F/S closed

Startup

DRAIN

When in the "SERVICE" position, the control switch supplies power to the service switch and the icemaker is in service mode.

Legend:

BC-bin control

CIRC.

The service switch has three positions: "DRAIN," "CIRC." and "WASH." See the information below for details of each function.

Comp-compressor

DV- drain valve

FMRs-fan motors-remote

F/S-oat switch

WASH

HGVs-hot gas valves (KMS and SRK)

LLVs-liquid line valves (KMS and SRK)

PM-pump motor

WV-inlet water valve

2. Shutdown Flow Chart

3. Ice Level Lowered

Icemaker starts at

To 1. 1-Minute Fill Cycle

"1. 1-Minute Fill Cycle."

BC closed

(BC actuator paddle disengaged)

Green "BC CLOSED" LED on

Yellow "BC OPEN" LED off

2. Icemaker Off

All components

de-energized.

Yellow "BC OPEN" LED continues.

All components de-energized.

Shutdown Flow Chart

Control board retains freeze-time correction count data

between bin control restarts.

to 15 sec. into the freeze cycle if

activated at the end of the harvest cycle.

15 sec. before the 5-min. short cycle

protection timer terminates.

Otherwise, at the end of the next harvest

cycle.

BC open (BC actuator paddle engaged)

Green "BC CLOSED" LED off

Yellow "BC OPEN" LED on

Legend:

BC–bin control

1. Bin Full

Shutdown Delay:

• Fill Cycle–15 sec. after activation.

• Harvest Cycle–At the end of the harvest cycle, or up

• Freeze Cycle– 15 sec. after activation if activated at least

Shutdown

and Restart

BC Operation

3. Freeze-Time Correction Chart

Overow

2. 10-Minute Fill/

WV energized

Comp de-energized

FMRs de-energized

HGVs de-energized

PM de-energized

After 5th 10-Minute Harvest Pump Cycle with WV

Freeze-Time Correction Cycle Complete.

Go to Step "3. Freeze Cycle" in Operation Flow Chart.

step 1 for 5th and nal time.

• Do not adjust S4 dip switch 7 out of the factory position.

• After step 2 completes 4th sequence (80 min. completed), repeat

1. 10-Minute Harvest Cycle with WV

Comp energized

FMRs energized

HGVs energized

PM energized

WV energized

Freeze-Time Correction Flow Chart

Cycle Steps

Steps 1 and 2 repeat

4 times (total 80 min.),

then step 1 repeats for

a 5th time to complete

Freeze-Time Correction

Start

Legend:

Comp–compressor

FM–fan motor

FMRs–fan motor-remote

HGVs–hot gas valve

PM–pump motor

WV–inlet water valve

Appliance Cycle Reset and Alarm Reset:

Cycle Reset: Power Supply or Control Switch Turned Off and On again:

Appliance turns off, then re-starts at 1.Fill Cycle.

Alarm Reset: CB "ALARM RESET" pressed during or after a freeze-time

correction cycle with power supply on:

Appliance continues cycle with no interruption or reset.

CB red "POWER OK" LED blinking:

CB red "POWER OK" LED resets to solid.

CB yellow "EXT HARVEST" LED blinking:

Cycle.

Differential

Value in Sec.

3 254

4 309

5 349

6 380

7 406

8 427

9 446

10 462

CB yellow "EXT HARVEST: LED turns off.

Number of

Freeze Time Differential Exceeded.

Minimum and Maximum Freeze times have

exceeded differential parameters.

Freeze-Time Correction function is enabled

when S4 Dip Switch 7 is in the "ON" position.

CB monitors freeze time. After 3freeze

cycles, CB compares the minimum and

maximum differential of the 3 freeze cycle

times. Every freeze cycle time after the third

freeze cycle time is added to the minimum/

maximum calculation.

Example: After 8 cycles, if the differential

between the shortest cycle (minimum) and

the longest cycle (maximum) is equal to or

greater than 427 sec. a freeze-time correction

cycle is initiated:

Freeze Cycles

Note: When 1st freeze-time correction cycle

is initiated, CB "POWER OK" LED starts

blinking. On 2nd freeze-time correction cycle,

if CB "POWER OK" LED has been reset,

CB "POWER OK" LED starts blinking. If CB

"POWER OK" had not been reset after 1st

freeze-time correction cycle CB "POWER

OK" LED continues to blink.

After 3rd freeze-time correction cycle in

36hours, CB yellow "EXT HARVEST" LED

starts blinking.

Appliance continues to operate and LEDs

continue to blink until ALARM RESET button

is pressed with power on.

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. Control switch in "OFF" position does not de-energize all loads. Use extreme caution and exercise safe electrical practices.

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

• Before servicing the appliance, move the control switch to the "OFF" position and turn off the power supply.

• 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 dispenser unit/ice storage bin.

• Make sure all food zones in the appliance and dispenser unit/ice storage bin are clean after service.

1. Diagnostic Procedure

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 neutral (W) to establish

a good neutral connection.

• On 3-phase models, the neutral (W) is provided through MT. To conrm a good neutral (W), check for 60VAC from neutral (W) to ground (GND). If 60VAC is present, neutral (W) is good. If 60VAC is not present, check 208-230VAC main power supply to MT. If 208-230VAC is present, check MT continuity.

• When checking voltage from the CB K1 connector (10 pin connector), pull CB K1connector out slightly to allow room for multimeter test leads contact.

1) Turn off the power supply, then access the control box. Clear any ice from BC.

2) Check that the 115VAC 10A fuses in the KMS and SRK are good.

Conrm that the location meets installation requirements:

KMS-2000MLJ:

• The appliance is not intended for outdoor use. Normal operating ambient temperature should be within 45°F to 100°F (7°C to 38°C).

• Allow 6" (15 cm) clearance at sides, rear, and top of the appliance for proper air circulation and ease of maintenance and service.

• The appliance should not be located in a corrosive environment.

SRK-20J/3:

• A dry and well ventilated area with 24" (61 cm) clearance in both front and rear for proper air circulation and ease of maintenance and/or service should they be required.

3) Power On: Turn on the power supply, then move the control switch to the "ICE" position. A 5-sec. delay occurs. CB red "POWER OK" LED and CB green "BC CLOSED" LED turn on. If CB yellow "BC OPEN" LED is on (indicating a full bin), check CB K4 red jumper. Move ice away from BC bulb.

Note: • CB red "POWER OK" LED remains on unless the 10.5VAC power supply is

interrupted (K2 connector).

• Check CB using the steps in "II.D. Control Board Check."

a) Power On Diagnosis: If CB red "POWER OK" LED is off, conrm 10A fuse on

both the KMS and the SRK are good. Conrm wire harness is connected and not damaged. Next, check SRK switches. Check for 115VAC at both HPS wires (BR) to neutral (W). If 115VAC is present on one and not the other, HPS is open. If HPS is open, see "b) HPS Diagnosis" below. If HPS is closed, check for 115VAC at both DLT wires (BR) to neutral (W). If 115VAC is present on one and not the other, DLT is open. If DLT is open, see "c) DLT Diagnosis" below. If DLT is closed, go to KMS and check for 115VAC at BC wires (BR) to neutral (W). If 115VAC is present on one and not the other, BC is open. See "II.E. Bin Control Check." If BC is closed, check for 115VAC at control switch #1 (BR) to neutral (W) then at control switch #2(BK) to neutral (W). If 115VAC is present on #1 (BR) and not on #2 (BK), replace control switch. If 115VAC is present on control switch #2 (BK), check for 10.5VAC at CB K2#1 red wire to CB K2 #2 red wire. If 10.5VAC is not present, check CT wire connections and CT continuity. If open, replace CT.

b) HPS Diagnosis: Check that all shutoff valves (4 total) are open and the condenser

coil is not clogged or restricted. Let refrigeration circuit pressures equalize. If HPS does not reset and pressures are equalized, replace HPS. If pressures are not equalized, reclaim refrigerant and diagnose refrigeration circuit restriction. Check that there are no restrictions in the refrigeration circuit. Harvest Cycle: HGVs, strainer, or check valve. Freeze Cycle: FMRs, TXV, HM, LLVs, strainer, check valve, drier, and damaged line set or tting.

c) DLT Diagnosis: Check that the condenser coil is not clogged or restricted. Let

discharge line thermostat cool, if DLT does not close, replace DLT. Once closed, restart appliance, once Comp starts, check voltage and amp draw. See "5a),a) Comp Diagnosis" below.

4) 1-Min. Fill Cycle – LED 4 is on. WV and X11 relay energize. After 1 min., CB checks for a closed FS. If FS is closed, the harvest cycle begins. If harvest cycle begins (Comp, HGVs, and FMRs energized), continue to step 5a. If FS is open, WV remains energized until FS closes (low water safety protection during initial start up and at the end of each harvest). Diagnosis: Check that water enters the water tank. If not, check that the water supply line shut-off valve is open and screens or external lters are clear. Check for 115VAC at CB K1 #6 (O) to neutral (W). If 115VAC is not present, replace CB. If 115VAC is present, and WV does not energize, check for 115VAC at WV. If 115VAC is present, check WV coil continuity. Ifopen, replace WV. If the water tank lls, but the appliance fails to start harvest (Comp energized), check for open FS. See "II.F. Float Switch Check and Cleaning." If FS is closed and CB fails to start the harvest cycle after 1 min., replace CB.

5a) Initial Harvest Cycle – LEDs 1, 4, and 2 are on. WV and X11 relay continue. Comp,

FMRs, HGVs, and X10 relay energize. CBmonitors the warming of the evaporator via the thermistor located on the suction line. When the thermistor reaches 48°F (9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to the harvest timer (S4 dip switch 1 & 2 and S5 dip switch 4). WV and X11 relay are energized during harvest for a maximum of 6 min. or the length of harvest minus HPT setting (S4 dip switch 6), whichever is shorter. See step 5b below.

a) Comp Diagnosis: Check that evaporator is warming. Ifnot, conrm that Comp

energizes. If not, check for 115VAC at CB K1 #1 (V) to neutral (W). If 115VAC is not present, check for 115VAC at CB K1 #10 (BR) to neutral (W). If115VAC is present at #10 (BR) and not at #1 (V), replace CB. If 115VAC is present, check for 115VAC at MC solenoid (SRK). If 115VAC not present, check wire harness connections. If115VAC is present, conrm contacts are closed. If not, replace MC. If MC contacts are closed, check Comp start and run capacitors, start relay (single phase), and Comp motor winding.

b) HGVs Diagnosis: If Comp is energized and evaporator is not warming, check

that HGVs energizes and open. Check for 115VAC at CB K1 #2 (P) to neutral (W). If115VAC is not present, replace CB. If 115VAC is present, check for 115VAC at HGVs coil (KMS and SRK) and check HGVs coils continuity. Replace as needed.

c) LLVs Diagnosis: Conrm that both LLVs are de-energized (KMS and SRK) and

closed (not bypassing). Ifenergized, replace CB. If de-energized and bypassing, replace LLVs (KMS and SRK).

5b) Harvest Pump Timer – LEDs 1, 3, and 2 are on. When the thermistor reaches

48°F (9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to the harvest timer (S4 dip switch 1 & 2 and S5 dip switch 4). When WV de-energizes, LED 4 turns off, X11 relay de-energizes and LED 3 turns on. PM and X12 relay energize. Comp, FMRs, HGVs, and X10 relay continue. Diagnosis: Place a thermometer on the suction line next to the thermistor. Has it warmed to 48°F (9°C) or warmer? Conrm thermistor status. See "II.G. Thermistor Check." If the thermistor reading is in proper range, dip switch 7 is on, and PM does not energize before harvest terminates, replace CB. If WV continues, check for 115VAC at CB K1 #6 (O). If115VAC is present, and LED 4 is off, replace CB. If 115VAC is not present, and WV continues, check WV diaphragm for leaking by. Clean or replace. If LED 3is on and PM is not energized, check for 115VAC at CB K1 #5(DBU). If115VAC is not present, replace CB. If 115VAC is present and PM is not energized, check for 115VAC at X10relay terminal #8 (Y) to neutral (W). If 115VAC is not present, check for 115VAC at X10 relay terminal #4 (P) to neutral (W) and X10 relay terminal #6(Y) to neutral (W). If 115VAC is present on terminal #4(P) and not on terminal #6(Y), replace X10 relay. If 115VAC is present on X12 relay terminal #8 (P) and PM is not energized, check for 115VAC at X12 relay terminal #4 (W/R) to neutral (W) and terminal #6 (DBU) to neutral (W). If 115VAC is present on terminal #6(DBU) and not on terminal #4 (W/R), replace X12relay. If 115VAC is present on X12relay terminal #4(W/R). If 115VAC is present between X12 relay terminal #4 (W/R) and neutral (W), check PM capacitor and motor winding continuity.

5c) Initial Harvest Cycle Termination Diagnosis: When the thermistor reaches 48°F

(9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to the harvest timer (S4 dip switch 1 & 2 and S5 dip switch 4). Check discharge line temperature. For a thermistor check, see "II.G.Thermistor Check." If 1-min. ll cycle starts after harvest timer terminates, check that FS is clean and operating properly, see "II.F. Float Switch Check and Cleaning." If FS is closed, CB proceeds to the next cycle. Ifnot, replace CB.

Note: The minimum total time allowed by CB for a complete harvest cycle is based on

S5 dip switch 4. Maximum harvest time allowed is 20 min.

NOTICE! S4 dip switch 7 must remain on. Otherwise, PM will not energize during the last seconds of harvest.

6) Freeze Cycle – LED 1 is on. Comp, FMRs, and PM continue. LLVs energize.

HGVs, X10 and X12 relays de-energize. Appliance is held in freeze by a 5-min. short cycle protection timer. After 5-min. short cycle protection timer terminates and FS opens, freeze cycle terminates. Note: PM power supply switches from CBK1 #5(DBU) in HPT to K1 #4 (R) in freeze.

Anti-Slush: When anti-slush is enabled (S5 dip switch 5 "ON"), PM de-energizes when

thermistor reaches 36°F (2.2°C) (5.8 kΩ) for 10 sec. then, energizes for the remainder of the freeze cycle.

a) Freeze Cycle Diagnosis: Conrm Comp, FMRs, and PM continue. Conrm that

LLVs energize. Next, conrm HGVs, X10 and X12 relays de-energize. During the rst 5 min. of freeze, conrm evaporator is cooling. If not, conrm WV de-energized (not leaking by), HGVs de-energized (not bypassing), LLVs energizes, TXV and HM operate correctly, Comp is efficient, and refrigerant charge is correct. See "VIII.A. Specication and Performance Data Sheets."

b) Comp and FMRs Diagnosis: If Comp and FMRs de-energize once freeze begins,

check that appliance has not shut off on HPS or DLT ("POWER OK" LED off). If so, check "3)b) HPS Diagnosis" or "3)c) DLT Diagnosis" above. If CB "POWER OK" LED is on (KMS), check for 115VAC at CB K1 #9 (V) to neutral (W). If115VAC is not present and LED 1 is on, replace CB. If 115VAC is present, check for 115VAC at MC coil (SRK). If 115VAC is not present, check wire harness connections. Next, check for 115VAC at MC coil. If 115VAC is present, check MC coil and contacts continuity. Replace as needed. If MC is okay, check Comp start relay and start and run capacitors (single phase). Next, check Comp motor winding continuity. If Comp is energized but evaporator is not cooling, check for an inefficient Comp. See "VIII.A. Specication and Performance Data Sheets." FMRs Diagnosis: If Comp is energized but FMRs are not, check for 115VAC at MC terminal "NO" black (BK) wire to neutral (W). If 115VAC is not present, and MC is energized replace MC. If 115VAC is present, check FMRs capacitors, motor windings, and fan blades for binding.

c) WV and HGVs Diagnosis: If WV is energized, check for 115VAC at CB K1 #6 (O)

to neutral (W). If 115VAC is present after PM energizes in harvest cycle, replace CB. If 115VAC is not present, replace WV (bypassing). If HGVs (KMS and SRK) did not de-energize at the end of harvest, check for 115VAC at CB K1 #2 (P) to neutral (W). If 115VAC is present 50 sec. after PM energizes, replace CB. If 115VAC is not present, replace HGV(s) (bypassing).

d) PM Diagnosis: Conrm water is owing over evaporator from PM and not WV.

IfPM de-energizes once freeze begins (except for anti-slush), check for 115VAC at CB K1 #4 (R) to neutral (W). If 115VAC is not present, replace CB. If 115VAC is present and PM is de-energized, check for 115VAC at control switch #5 (W/R) to neutral (W). If115VAC is present at CB K1 #4 (R) and not at control switch #5 (W/R), check control switch continuity between #5 (W/R) and #4 (R). Replace as needed. If115VAC is present at control switch #5 (W/R) to neutral (W), check PM capacitor and motor winding continuity.

e) LLVs Diagnosis: If LLVs does not energize, check for 115VAC at CB K1#3 (BK) to

neutral (W). If 115VAC is not present, replace CB. If 115VAC is present, check coil voltage and continuity.

f) Refrigerant Pressures, HM, and TXV Diagnosis: If evaporator is still not cooling,

check refrigerant pressures. See "VIII.A. Specication and Performance Data Sheets." Next, check HM operation. If refrigeration pressures are above HM setpoint and HMis bypassing, replace HM. Check TXV for proper operation. Remove TXV bulb and hold it in your hand, refrigerant low-side pressure should rise, place TXV bulb in ice water, refrigerant low-side pressure should drop. A 10 to 15 pound pressure swing between warm and cold conditions indicate a good TXV. If a 10 to 15 pound swing is not present, replace TXV.

g) Freeze Termination Diagnosis: After 5 min. in freeze, disconnect CB K5 FS

connector. 15 sec. later appliance should switch out of the freeze cycle (15 second delay after FS opens before terminating the freeze cycle). If appliance remains in freeze longer than 15 sec. after FS removed, replace CB. If appliance switches with FS removed but would previously not switch out of freeze with FS connected (long freeze - 3 beep alarm), see "II.F. Float Switch Check and Cleaning."

Note: Normal freeze cycle will last 20 to 40 min. depending on model and conditions. Cycle times and pressures should follow performance data provided in this manual. See "VIII.A. Specication and Performance Data Sheets."

h) Short Freeze Cycle Diagnosis: Conrm water tank lls and overows during 1 min.

ll and harvest cycles. If not, check water supply lters, shut-off valve, WV screen. Ifwater tank empties before 5 min. timer terminates and freeze cycle is short, check that DV is not leaking by or energized (water owing through DV). If DV is leaking by, remove and clean DV, replace as needed. If water tank is full, see "II.F. Float Switch Check and Cleaning." for erratic operating FS.

7) Pump-Out Cycle – LEDs 1, 3, and 2 are on (10/20 second pump-out). Timing of the

rst pump-out is determined by S4 dip switch 5. See the table below.

Control Board Settings

S4 Dip Switch Setting

No. 5

OFF Every 10 cycles After 11th freeze cycle

ON Every cycle After 2nd freeze cycle

Pump-Out Frequency Control Board

Comp and FMRs continue, HGVs energize. Note: If S4 dip switch 3 & 4 are set to 3 off and 4 on, LED 4 turns on and WV and X11 relay energize, energizing X10 relay. NOTICE!S4dip switch 3 & 4 must not be set

to 3 off and 4 on. Otherwise, LED 4 turns on energizing WV and X11 relay. X11 relay energizes X10 relay. Once X10 relay energizes, X12 relay cannot energize. Preventing DV from energizing.

LLVs de-energize. PM stops for 2 sec., then restarts for 10/20 sec. depending on pump-out timer (S4dip switch 3 & 4) setting. When the pump-out timer terminates, pump-out is complete. The pump-out frequency control (S4 dip switch 5) is factory set, and generally no adjustment is required. However, the pump-out frequency control can be set to have a pump-out occur every 10 cycles or every cycle. For details, see "III.C.4. Pump-Out Frequency Control (S4 dip switch 5)."

a) Pump-Out Diagnosis: In the freeze cycle before pump-out (see table above), after

5min. of freeze disconnect CB black K5 connector (FS connector). Check that CB LEDs 1, 3, and 2are on, PM stops, then restarts, DV energizes, and water is owing down the drain through DV.

b) CB Diagnosis: Conrm LLVs de-energize. If LLVs are energized with LEDs 1, 3,

and 2 on, replace CB. If PM does not stop and restart and DV does not energize, check that CB LEDs 1, 3, and 2 are on. Ifnot, replace CB. IfLEDs 1, 3, and 2 are on and X12 relay is not energized, check for 115VAC at CB K1 #5 (DBU) to neutral(W). If115VAC is not present, replace CB. If115VAC is present at CB K1 #5 (DBU) and X12 relay is not energized, continue to "c) X12 Relay Diagnosis:" below. If X12 relay is energized and DV are not energized, check for 115VAC at CB K1 #2 (P) to neutral(W). If LED 2 is on and 115VAC is not present at CB K1 #2 (P), replace CB.

c) X12 Relay Diagnosis: If 115VAC is present at CB K1 #5 (DBU) and CB K1 #2 (P)

and X12 relay and DV are not energized, check for 115VAC at X12 relay #8 (P) to neutral (W). If115VAC is not present, check wiring connections from CB K1 #5 (DBU) to X12 relay #6 (DBU), then at X12 relay #4 (W/R). If 115VAC is present at X12 relay #6 (DBU) and not at X12 relay #4 (W/R), conrm X12 relay is de-energized, if X12 relay is de-energized, replace X12 relay (sticking contacts). If 115VAC is present at X12 relay #5 (DBU) to neutral (W), and X12 is de-energized, check relay coil continuity. Replace as needed.

d) PM Diagnosis: Check for 115VAC at X12 relay #6 (DBU) to neutral(W). If 115VAC

is not present, see "b) CB Diagnosis" above. Next, check for 115VAC at X12 relay #4(W/R) to neutral (W). If 115VAC is not present, conrm X12 relay is energized. If X12 relay is de-energized, see "c) X12 Relay Diagnosis:" above. If X12 relay is energized and 115VAC is present at X12 relay #6 (DBU) and not at X12 relay #4(W/R), replace X12 relay. If 115VAC is present at X12 relay #4 (W/R) and PM is de-energized, check PM capacitor, motor winding, wiring connections, and impeller for binding.

e) DV Diagnosis: Check for 115VAC at X12 relay #5 (DBU) to neutral (W) and at

X12relay #3 (GY) to neutral (W). If 115VAC is not present at X12 relay #5 (DBU), see "b) CB Diagnosis:" above. If 115VAC is present at X12 relay #5 (DBU) and not at X12 relay #3(GY), conrm X12 relay is energized. If X12 relay is de-energized, see "c) X12 Relay Diagnosis:" above. If X12 relay is energized and 115VAC is present at X12 relay #5 (DBU) and not at X12 relay #3 (GY), replace X12 relay. If115VAC is present at X12 #3 (GY) and DV is de-energized, check DV coil continuity, make sure the drain line is not clogged and that DV is clean and operating properly.

8) Normal Harvest Cycle – Same as the initial harvest cycle. Return to step 5a) above. Note: Appliance continues to cycle until BC is satised or power is switched off. The

appliance always restarts at the 1-min. ll cycle

2. Shutdown Diagnosis

When BC is activated (BC open), the yellow "BC OPEN" LED comes on. The icemaker then shuts down as outlined in the table below.

Cycle at Bin Control Activation

Fill Cycle 15 seconds after activation.

Harvest Cycle At the end of the harvest cycle, or up to 15 seconds into the freeze cycle if activated

Freeze Cycle 15 seconds after activation if activated at least 15 seconds before the 5-minute short

Shutdown

at the end of the harvest cycle.

cycle protection timer terminates. Otherwise, at the end of the next harvest cycle.

3. Freeze-Time Correction Cycle Diagnosis

1) See "II.C. Freeze-Time Correction Cycle (90 min.)."

Legend: BC–bin control; CB–control board; Comp–compressor; CT–control transformer;

CV–cleaning valve; DV–drain valve; FMRs–fan motor remote; FS–oat switch; HGVs–hot gas valves; HM–headmaster (C.P.R.); HPS–high-pressure switch; LLVs–liquid line valves; MC–magnetic contactor: MT–main transformer; PM–pump motor; TXV–thermostatic expansion valve; WV–inlet water valve

C. Freeze-Time Correction Cycle (90 min.)

Freeze-Time Correction function is enabled when S4 Dip Switch 7 is in the "ON" position and initiates when the minimum and maximum freeze times have exceeded differential parameters. Freeze-time correction timer and count starts at the beginning of the 2nd freeze cycle after startup from power off condition. Freeze-time correction timer and count continues and retains its freeze-time correction timer and count during a BC off cycle and resumes its freeze-time correction timer and count on the 2nd freeze cycle after BC restart. If freeze-time differential is exceeded (see table below), freeze-time correction cycle starts and CB red "POWER OK" LED blinks. When freeze-time correction cycle occurs 3 or more times within a 36 hour period, CB yellow "EXT HARVEST" LED blinks with CB red "POWER OK" LED. Appliance starts in freeze cycle after a freeze-time correction cycle. Toreset CB LEDs, press ALARM RESET button on CB with power on. CB resets LEDs and appliance continues cycle without interruption.

1) Freeze Time Differential Initiation: CB starts monitoring freeze times on the second freeze time. After 3freeze cycles (4th total), CBbegins to compare minimum and maximum freeze time cycles. Every freeze cycle time after the rst freeze cycle time is added to the freeze time list. Minimum and maximum freeze time differential comparisons begin on the third cycle and are monitored up to 10cycles. On the 11th cycle the rst freeze cycle time is dropped to maintain the 10 maximum number of cycles. Example: After 8 cycles (excluding rst cycle), if the differential between the shortestcycle (minimum) and the longest cycle (maximum) is equal to or greater than 427 sec. a freeze-time correction cycle is initiated:

Number of Freeze Cycles

Differential Value in Sec.

3 254 4 309 5 349 6 380 7 406 8 427 9 446

10 462

2) Freeze-Time Correction Sequence: First occurrence within 36 hr., minimum and maximum freeze times have exceeded differential parameters. CB "POWER OK" LED starts blinking. Freeze-Time Correction Cycle starts. Second occurrence within 36 hr., minimum and maximum freeze times have exceeded differential parameters. If not reset, CB "POWER OK" LED continues blinking. If reset from rst occurrence, CB "POWER OK" LED starts blinking. Freeze-Time Correction Cycle starts.

Third occurrence within 36 hr. minimum and maximum freeze times have exceeded differential parameters. CB yellow "EXT HARVEST" LED starts blinking. Also, If not reset, CB "POWER OK" LED continues blinking. If reset, CB "POWER OK" LED starts blinking. Freeze-Time Correction Cycle starts. Total freeze-time correction cycle last for 90min. At the end of 80min., the nal step initiates and nal Harvest Pump Time (Harvest Assist) with WV (10-min.) starts. Once the nal Harvest Pump Time (Harvest Assist) with WV (10-min.) terminates (90 min. complete), normal freeze cycle begins.

2a) 10-Min. Harvest Pump Time (Harvest Assist) with WV: CB "POWER OK" LED

blinking. CB LEDs 1, 4, 3, and 2 are on and Comp, FMRs, HGVs, PM, and WV energize. 10-min. timer starts. Once 10-min. timer terminates, CB LEDs 1, 3, and 2 turn off and Comp, FMRs, HGVs, and PM de-energize. WV continues.

2b) 10-Min. Fill: CB LED 4 on and WV energized. 10-min. timer starts.

2c) Final 10-Min. Harvest Pump Time (Harvest Assist) with WV: CB "POWER OK" LED

blinking. Once 10-min. timer terminates, CB LEDs 1, 4, 3, and 2 are on and Comp, FMRs, HGVs, and PM energizes. WV continues. 10-min. timer starts. Once 10-min. timer terminates, normal freeze cycle begins. CB LED 1 on and Comp, FMRs, and PM continue. HGVs and WV de-energize.

Note: After 3rd Freeze-Time Correction Cycle in 36 hours, CB signals with blinking CB

yellow "EXT HARVEST" LED. Appliance continues normal operation. CB "POWER OK" LED and CB yellow "EXT HARVEST" LED continue blinking in normal operation sequence.

3) Appliance Cycle Reset and CB Alarm Reset: Cycle Reset: Power supply or control switch turned off and on again: Appliance turns off, then restarts at 1-min. ll cycle. Alarm Reset: CB "ALARM RESET" pressed during or after a freeze-time correction cycle with power supply on: Appliance continues cycle with no interruption or reset. CB red "POWER OK" LED blinking: CB red "POWER OK" LED resets to solid. CB yellow "EXT HARVEST" LED blinking: CB yellow "EXT HARVEST: LED turns off.

Legend: BC–bin control; CB–control board; Comp–compressor; CT–control transformer;

CV–cleaning valve; DV–drain valve; FMRs–fan motor remote; FS–oat switch; HGVs–hot gas valves; HM–headmaster (C.P.R.); HPS–high-pressure switch; LLVs–liquid line valves; MC–magnetic contactor: PM–pump motor; TXV–thermostatic expansion valve; WV–inlet water valve

D. Control Board Check

Before replacing CB that does not show a visible defect and that you suspect is bad, always conduct the following check procedure. This procedure will help you verify your diagnosis.

Alarm Reset: If CB is in alarm (beeping), press the "ALARM RESET" button on CB

while CB is beeping. WARNING!Risk of electric shock. Care should be taken not to touch live terminals. Once reset, the icemaker starts at the 1-minute ll cycle. For audible alarm information, see "III.B. LED Lights and Audible Alarm Safeties."

1) Check the dip switch settings to assure that S4 dip switch 3, 4, 6, 7, 8, 9, 10 and S5 dip switch 1 through 5 are in the factory default position. S4 dip switch 1, 2, and 5 are cleaning adjustments and the settings are exible. For factory default settings, see "III.C.1. Default Dip Switch Settings."

2) Move the control switch to the "ICE" position. If the red "POWER OK" LED is on, control voltage is good, continue to step 3. If the "POWER OK" LED is off, check CT secondary circuit. CT output is 10.5VAC at 115VAC primary input. If the secondary circuit has proper voltage and the red LED is off, replace CB.

If the secondary circuit does not have proper voltage (10.5VAC), check CT primary

circuit. Check for 115VAC at control switch terminal #1 (BR) and control switch terminal #2 (BK) to neutral (W). If 115VAC is present at control switch terminal #1 (BR) and not at control switch terminal #2 (BK), replace control switch. If 115VAC is present at control switch terminal #2 (BK), check CT coil continuity. Replace as needed. For additional checks, see "II.I.1. No Ice Production."

3) The "OUTPUT TEST" button provides a relay sequence test. Make sure the control switch is in the "ICE" position, then press the "OUTPUT TEST" button. For the correct lighting sequence, see the table below. Note that the order of the LEDs from the outer edge of the control board is 1, 4, 3, 2. Components (e.g., compressor) cycle during the test.

Control

Board

Correct LED

Lighting Sequence

1, 4, 3, 2

Following the test, the appliance begins operation at the 1-minute ll cycle for both. If the LEDs do not light as described above, replace CB.

4) To verify voltage output from CB to the components, slide the CB K1 connector out far enough to allow multimeter lead contact. With the icemaker in the cycle to be tested, check output voltage from the corresponding pin on CB K1 connector to a neutral (W). If output voltage is not found and the appropriate LED is on, replace CB.

5) Check CB control connectors K3, K4, and K5 for correct VDC per table below. Note: Pin #1 is DC ground (GND) on each connector.

Legend: CB–control board; CT–control transformer

K3 Thermistor

Pin # VDC

#1 to #2 5VDC

#1 to #3 5VDC

#2 to #3 0VDC

K4 Bin Control

Pin # VDC

#1 to #2 5VDC

#1 to #3 5VDC

#2 to #3 0VDC

Thermistor

Bin Control

Float Switch

K5 Float Switch

Pin # VDC

#1 to #2 1.2VDC

#1 to #3 2VDC

#2 to #3 1.2VDC

RED WHITE

BLACK

E. Bin Control Check

1. Bin Control Check

This appliance uses a lever-actuated proximity switch to control the ice level in the storage bin. No adjustment is required.

To check BC, follow the steps below.

1) Turn off the power supply.

2) Remove the front panel, then move the control switch to the "OFF" position.

3) Remove the control box cover.

4) Remove the base cover and clear any ice away from BC.

5) Disconnect BC connector from CB K4 connector.

BC Connector

6) Check for continuity across the wires of BC connector. When the actuator paddle is

Bin Control Bracket

not engaged, BC switch is closed. Ifopen, check that the actuator paddle is not sticking. Clean if necessary. See "II.E.2. Bin Control Cleaning." If BC switch still reads open, replace BC.

7) Press and hold the actuator paddle;

check for continuity across the wires of BC connector. When the actuator paddle is engaged, BC switch is open. If closed, check that the actuator paddle is not restricted. Clean if necessary. See

Actuator Paddle

"II.E.2.Bin Control Cleaning." If BC switch still reads closed, replace BC.

Fig. 1

8) Reconnect BC connector to CB K4 connector, then move the control switch to the "ICE" position. Turn on the power supply.

9) Check that CB green "BC CLOSED" LED is on.

10) Allow the appliance to cycle on. Press and hold the actuator paddle. CB yellow "BCOPEN" LED should turn on and the icemaker should shut down according to the chart below. If it does not, replace CB.

Cycle at Bin Control Activation

Fill Cycle 15 sec. after activation.

Harvest Cycle At the end of the harvest cycle, or up to 15 sec. into the freeze cycle if activated at the

Freeze Cycle 15 sec. after activation if activated at least 15 sec. before the 5-min. short cycle

Shutdown

end of the harvest cycle.

protection timer terminates. Otherwise, at the end of the next harvest cycle.

Legend: BC–bin control; CB–control board

2. Bin Control Cleaning

Scale may build up on BC. Scale can cause the actuator paddle and magnet to stick. In this case, BC should be cleaned.

WARNING

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

securely in place after the ppliance is serviced. Make sure that none have fallen into the dispenser unit/storage bin.

1) Turn off the power supply.

2) Remove the front panel, then move the control switch to the "OFF" position.

3) Remove the top and right side panels. Remove the control box cover, then clear any ice away from BC.

4) Disconnect BC connector from CB K4 (red) connector, then remove BC from the icemaker.

5) Remove the actuator paddle from the switch mount. See Fig. 2.

6) Wipe down BC with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts warm water. Rinse the parts thoroughly with clean water.

7) Reassemble BC and replace it in its correct position. Note: If the magnet was removed for

cleaning, be sure to replace it in its correct position.

8) Reconnect BC connector to CB K4 (red)

Bin Control Proximity Switch Closed (calling for ice)

connector.

To Control Board K4 (red) Connector

Bin Control

Proximity Switch

Actuator Paddle

Bin Control Proximity Switch Open (bin full, icemaker off or shutting down)

9) Move the control switch to the "ICE" position.

10) Replace the control box cover, right side, top, and front panels in their correct positions.

11) Turn on the power supply to start the automatic icemaking process.

Actuator Paddle

Switch Mount

Magnet

Fig. 2

F. Float Switch Check and Cleaning

F/S is used to determine that there is sufficient water in the water tank after the 1-minute ll cycle and after each harvest cycle. F/S is also used to determine that the appropriate volume of water has been converted into ice before switching out of the freeze cycle. No adjustment is required.

1. Float Switch Check

To check F/S, follow the steps below.

1) Turn off the power supply.

2) Remove the front panel.

3) Place the control switch in the "SERVICE" position. Then place the service switch in the "DRAIN" position.

4) Replace the front panel in its correct position, then turn on the power supply for 2minutes.

5) Turn off the power supply.

6) Remove the front panel, then move the control switch to the "OFF" position.

7) Remove the top and right side panels.

8) Remove the control box cover, then disconnect F/S connector from CB K5 (black) connector.

9) Check for continuity across F/S leads. With the water tank empty, F/S should be open. If open, continue to step 10. If closed, follow the steps in "II.F.2. Float Switch Cleaning." After cleaning F/S, check it again. Replace if necessary.

10) Reconnect F/S connector to CB K5 (black) connector, then replace the control box cover, right side, and top panels in their correct positions.

11) Move the control switch to "ICE" position. Replace the front panel.

12) Turn on the power supply.

13) As water lls the water tank, F/S contacts should close. After 1-min., the 1-min. ll cycle should end and the initial harvest cycle should begin.

14) Once the harvest cycle starts, turn off the power supply.

15) Remove the front panel, then move the control switch to the "OFF" position.

16) Remove the top and right side panels.

17) Remove the control box cover, then disconnect F/S connector from CB K5 (black) connector.

18) Check for continuity across F/S leads. With the water tank full, F/S should be closed. If F/S is closed and the icemaker will not switch from the 1-min. ll cycle to the initial harvest cycle, replace CB.

19) If open, conrm that the water tank is full. If the water tank is not full, check the water supply, water lters, and inlet water valve. If the water tank is full, follow the steps in "II.F.2. Float Switch Cleaning." After cleaning F/S, check it again. Replace if necessary.

20) Reconnect F/S connector to CB K5 (black) connector, then replace the control box cover, right side, and top panels in their correct positions.

21) Move the control switch to the "ICE" position.

22) Replace the front panel in its correct position.

23) Turn on the power supply to start the automatic icemaking process.

Legend: CB–control board; F/S–oat switch

2. Float Switch Cleaning

Depending on local water conditions, scale may build up on F/S. Scale can cause F/S to stick. In this case, F/S should be cleaned.

1) Turn off the power supply.

2) Remove the front panel.

3) Place the control switch in the "SERVICE" position. Then place the service switch in the "DRAIN" position.

4) Replace the front panel in its correct position, then turn on the power supply for 2minutes.

5) Turn off the power supply.

6) Remove the front, top, and right side panels, then move the control switch to the "OFF" position.

7) Disconnect the vent tube and the ush tube from the top of F/S housing, then remove F/S assembly. Remove the rubber boot from the bottom of F/S assembly. See Fig. 3.

8) Remove the retainer rod from the bottom of F/S assembly, then remove the oat. Be careful not to bend the retainer rod excessively when removing it.

9) Wipe down F/S assembly's housing, shaft, oat, and retainer rod with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts warm water. Clean the inside of the rubber boot and hose with cleaning solution. Rinse the parts thoroughly with clean water.

10) Reassemble F/S assembly and replace it and the rubber boot in their correct positions. Reconnect the vent tube and the

Flush Tube

ush tube.

11) Replace the right side and top panels in

Vent Tube

their correct positions.

12) Move the control switch to the "ICE"

Shaft

position.

13) Replace the front panel in its correct

Float Switch Housing

position.

14) Turn on the power supply to start the automatic icemaking process.

Legend: CB–control board; F/S–oat switch

Float

Retainer Rod

Rubber Boot and Hose

Fig. 3

G. Thermistor Check

To check thermistor resistance, follow the steps below.

1) Turn off the power supply.

2) Remove the front panel, then move the control switch to the "OFF" position.

3) Remove the top and right side panels, then remove the control box cover.

4) Remove the thermistor.

5) Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 minutes.

6) Disconnect the thermistor connector from CB K3 (white) connector and check resistance between thermistor leads. Normal range is 4.7 to 6.2 kΩ. If outside the normal range, replace the thermistor. See "IV.B. Component Service Information." If within the normal range, continue to next step.

7) Replace the thermistor in its correct position. See "IV.B. Component Service Information."

8) Reconnect the thermistor connector to CB K3 (white) connector.

9) Replace the control box cover, right side, and top panels in their correct positions.

10) Move the control switch to the "ICE" position.

11) Replace the front panel in its correct position.

12) Turn on the power supply.

13) Once the harvest cycle starts (Comp energizes), begin timing the harvest cycle.

14) The harvest timer and harvest cycle should terminate within 2 to 5 minutes. If the harvest cycle does not terminate within 2 to 5 minutes, replace CB.

Legend: CB–control board; Comp–compressor

Thermistor Lead Cable Tie

Foam Insulation Thermistor Holder

Fig. 4

H. Switches

Two control switches are used to control operation. These switches are referred to as the "control switch" and the "service switch" and are located on the control box.

1. Control Switch

The control switch has three positions: "OFF" for power off, "ICE" for icemaking, and "SERVICE" to activate the service switch. WARNING! Moving control switch to "OFF"

position does not de-energize all components.

2. Service Switch

When the control switch is in the "SERVICE" position, the control switch supplies power to the service switch and water pump. The machine is in service mode. The service switch has three positions: "DRAIN", "CIRCULATE", and "WASH." See the information below for details of each function.

Note:

1. When the service switch is activated, power is supplied to the water pump in all three positions.

2. When the control switch is in the "OFF" position or in the "ICE" position, the service switch has no power and can be left in any position.

a) DRAIN

This appliance utilizes a pump-out drain system. When the service switch is active and placed in the "DRAIN" position, power is supplied to the drain valve.

b) CIRCULATE

When the service switch is active and placed in the "CIRCULATE" position, power is supplied to the pump only. This operation can be used to circulate cleaner for extended periods of time over the outside surface of the evaporator.

c) WASH

This appliance utilizes a solenoid operated wash (bypass) valve. When the service switch is active and placed in the "WASH" position, power is supplied to the water pump and the wash valve. This operation is used to circulate cleaner and sanitizer over both the inside and outside of the evaporator.

I. Diagnostic Tables

Before consulting the diagnostic tables, check for correct installation, proper voltage per nameplate, and adequate water pressure (10 to 113 PSIG). Check control board using the steps in "II.D. Control Board Check."

1. No Ice Production

No Ice Production - Possible Cause

1. Power Supply a) Off, blown fuse, or tripped breaker.

b) Not within specications.

2. Main Transformer (3 phase SRK) (208-230VAC/115VAC)

3. Water Supply a) Water supply off or improper water pressure.

4. Fuse (SRK Control Box) a) Blown.

5. High-Pressure Switch (SRK) a) Dirty condenser.

6. Discharge Line Thermostat (SRK)

7. Wire Harness (From SRK to KMS)

8. Fuse (KMS Control Box) a) Blown.

9. Control Switch a) In "SERVICE" or "OFF" position.

10. Control Transformer (115VAC/10.5VAC)

11. Bin Control See "II.E. Bin Control Check"

12. Control Board See "II.D. Control Board Check"

13. Inlet Water Valve a) Screen or orice clogged.

a) Voltage tap switch not set to proper voltage.

b) No neutral. White (W) wire to ground 0VAC. (White (W) wire to

ground should be 60VAC).

b) External water lters clogged.

b) Condensing unit fan(s) not operating.

c) Headmaster (C.P.R.) open.

d) Refrigerant overcharged.

e) Bad contacts.

f) Refrigerant lines or components plugged.

a) Ambient temperature too warm.

b) Compressor or compressor components faulty.

c) Defective.

d) Hot gas valves open.

e) Dirty condenser.

f) Condensing unit fan(s) not operating.

a) Disconnected or loose connection.

b) Bad contacts.

a) Coil winding open or shorted.

a) Tripped with bin lled with ice.

b) Ambient temperature too cool.

c) Bulb out of position.

d) Set too warm.

e) Defective.

a) In alarm.

b) Yellow "BC OPEN" LED on (jumper loose or missing).

c) Defective.

b) Coil winding open.

c) Water valve open in freeze cycle.

No Ice Production - Possible Cause - continued

14. Float Switch See "II.F. Float Switch Check and Cleaning"

15. Compressor a) Magnetic contactor contacts bad or coil winding open.

16. Hot Gas Valves (KMS & SRK) a) Closed in harvest cycle.

1 7. Thermistor

See "II.G. Thermistor Check"

18. Pump Motor a) Motor winding open.

19. Thermostatic Expansion Valve a) Bulb loose.

20. Liquid Line Valves (KMS & SRK) a) Closed in freeze cycle.

2 1. Fan Motors-Remote a) Motor winding open.

22. Headmaster a) Defective.

23. Water System a) Water leaks causing short freeze time.

a) Float does not move freely.

b) Defective.

b) Start capacitor or run capacitor defective (1 phase SRK).

c) Start relay contacts bad or coil winding open

(1 phase SRK).

d) Internal protector open.

e) Compressor defective.

b) Open in freeze cycle.

a) Loose, disconnected, or defective.

b) Bearing worn out or locked rotor.

c) Defective capacitor.

b) Operating erratically.

b) Open in harvest cycle.

b) Bearing worn out or locked rotor.

c) Defective capacitor.

2. Freeze-Up

Defrost and clean the icemaker prior to diagnosing freeze-up. Fill out a freeze-up checklist. See "II.J. Freeze Up Check List," the Hoshizaki America Technician's Pocket Guide, or contact your local distributor for a copy of the freeze-up checklist.

Freeze-Up - Possible Cause

Harvest Cycle

1. Evaporator a) Scaled up.

b) Damaged.

2. Cube Guides a) Out of position.

b) Damaged.

3. Spray Tubes and/or Spray Guides or Splash Curtain

4. Water Supply a) Low water pressure.

5. Inlet Water Valve a) Defective.

6. Float Switch See "II.F. Float Switch Check and Cleaning"

7. Refrigerant Charge a) Low.

8. Control Board See "III. Controls and Adjustments" and "II.D. Control Board Check"

9. Bin Control See "II.E. Bin Control Check"

10. Thermistor See "II.G. Thermistor Check"

11. Thermostatic Expansion Valve a) Defective.

12. Hot Gas Valves (KMS & SRK) a) Closed or restricted.

13. Liquid Line Valves (KMS & SRK) a) Open.

1. Evaporator a) Scaled up.

2. Spray Tubes, Spray Guides, and Splash Guard or Splash Curtain

3. Refrigerant Charge a) Low.

4. Control Board See "II.D. Control Board Check"

5. Inlet Water Valve a) Leaking by.

6. Float Switch See "II.F. Float Switch Check and Cleaning"

7. Pump Motor a) RPM too slow.

a) Dirty.

b) Out of position.

b) External water lters clogged.

c) Insufficient water line size.

Minimum 3/8" nominal ID copper water tubing or equivalent.

a) Float does not move freely.

b) Defective.

a) Harvest timer (S4 dip switch 1 & 2) set too short.

b) Harvest pump timer (S4 dip switch 7) not in factory default position.

c) Defective.

a) Bulb out of position.

b) Defective.

a) Loose, disconnected, or defective.

Freeze Cycle

b) Damaged.

a) Dirty.

b) Out of position.

a) Freeze timer (S4 dip switch 9 & 10) set incorrectly.

b) Defective.

a) Float does not move freely.

b) Defective.

b) Impeller damaged.

Freeze-Up - Possible Cause

8. Thermostatic Expansion Valve a) Bulb loose or defective.

9. Headmaster a) Defective.

10. Liquid Line Valves (KMS & SRK) a) Restricted.

3. Low Ice Production

Low Ice Production - Possible Cause

Long Harvest Cycle

1. Evaporator a) Scaled up.

2. Spray Tubes and/or Spray Guides or Splash Curtain

3. Refrigerant Charge a) Low.

4. Water Supply a) Low water pressure.

5. Control Board See "II.D. Control Board Check"

6. Thermistor See "II.G. Thermistor Check"

7. Hot Gas Valves (KMS & SRK) a) Erratic or closed.

8. Inlet Water Valve a) Screen or orice clogged.

9. Compressor a) Inefficient or off.

10. Liquid Line Valves (KMS & SRK) a) Erratic or open.

11. Thermostatic Expansion Valve (TXV)

12. Headmaster (C.P.R.) a) Defective.

1. Evaporator a) Scaled up, dirty.

2. Float Switch See "II.F. Float Switch Check and Cleaning"

3. Inlet Water Valve a) Leaking by.

4. Hot Gas Valves (KMS & SRK) a) Erratic or open.

5. Condenser a) Clogged.

6. Control Board See "II.D. Control Board Check"

7. Refrigerant Charge a) Low.

8. Thermostatic Expansion Valve (TXV)

9. Compressor a) Inefficient or off.

10. Pump Motor a) RPM too slow.

11. Liquid Line Valves (KMS & SRK) a) Erratic or restricted.

12. Headmaster (C.P.R.) a) Defective.

a) Dirty.

b) Out of position.

b) External water lters clogged.

c) Insufficient water line size.

Minimum 3/8" nominal ID copper water tubing or equivalent.

d) Too cold.

a) Thermistor connection loose (K3).

b) Defective.

a) Loose, disconnected, or defective.

a) Defective.

Long Freeze Cycle

a) Scaled up, dirty.

b) Float sticking.

c) Defective switch.

a) Float switch connection loose (K5).

b) Defective.

a) Bulb loose.

b) Defective.

J. Freeze-Up Check List

Freeze-Up Check List

Please Complete When Diagnosing a Freeze-Up, Refrigerant Leak, or Low Charge

Technical Support Fax #: 770-487-3360

Make Copies And Use As Needed

Model #___________________________ Serial # _________________________Install Date______________Fail Date___________

List model and manufacture of bin or dispenser__________________________.

Date appliance was last cleaned:__________.

Freeze-Up Defrost

YES NO [ ] [ ] 1) After defrosting, was the appliance leak

checked?

[ ] [ ] 2) Were any leaks found?

If so where?_____________________.

[ ] [ ] 3) Was any refrigerant added to the unit?

If so, how much?_________________.

Set Up

[ ] [ ] 4) Is the appliance stacked? [ ] [ ] 5) Is water line independent? [ ] [ ] 6) Is water line correct size? If not________”.

3/8" Nominal ID Copper Water Tubing or Equivalent.

7) What is water pressure?___________. Water Temperature_________.

[ ] [ ] 8) Does appliance have any water ltration?

If yes please list the following: Filter brand___________________. Model________________. Filter pressure gauge reading during the ll cycle___________. Date lter was last replaced?__________________________. GPM or LPM ow rate of lter system?__________________.

9) Ambient temperature at appliance? ______________.

At remote condenser (if applicable)?________.

Appliance Status

[ ] [ ] 10) Is the appliance and/or oat switch dirty?

11) List the S4 (1-10) and S5 (1-5) DIP switch settings.

S4: 1___2___3___4___5___6___7___8___9___10____ S5: 1_____2_____3_____4_____5______ [ ] [ ] 12) Is DIP switch number 7 ON (harvest pump

time (harvest assist) all models and freeze-time correction models with control board

2A7664-02? [ ] [ ] 13) Is the cube guide positioned correctly? [ ] [ ] 14) Are the evaporator separators positioned

properly? [ ] [ ] 15) Is the thermistor properly mounted, tight, and

insulated? [ ] [ ] 16) Is the TXV bulb properly mounted, tight, and

insulated?

Appliance Operation

Fill YES NO [ ] [ ] 17) Does the water tank ll and overow?

60-90 sec. Note: Larger models may take up to

120 seconds to overow when empty. [ ] [ ] 18) If NO in step 17, is water ow 5GPM for larger? [ ] [ ] 19) Does the appliance utilize re-ll (S5 dip switch

2and 3)?

Harvest [ ] [ ] 20) Is the hot gas valve opening? [ ] [ ] 21) Is harvest pump time (harvest assist) utilized

(S4dip switch 7)? [ ] [ ] 22) Is hot gas valve opening in harvest? [ ] [ ] 23) Does water valve close completely when

de energized?

24) What was length of harvest?___________.

Freeze [ ] [ ] 25) Is pump motor energized in freeze cycle except

during 10-sec. anti-slush. If activated (S5 dip

switch 5 on)?

26) Water-cooled condenser outlet temperature 5-min. into freeze? ______________°F.

27) What was length of freeze?____________.

[ ] [ ] 28) Is the cube size consistent from inlet to outlet of

evaporator?

[ ] [ ] 29) Is ice still dropping when next freeze cycle starts?

30) What is the ice drop weight?___________.

31) What is head pressure? Freeze_________Harvest_______. (Freeze pressure should be taken 5 minutes into the cycle).

32) What is suction pressure? Freeze______Harvest_______. (Freeze pressure should be taken 5 minutes into the cycle).

[ ] [ ] 33) When activating bin control, did appliance

shutdown within 15seconds in the rst 5minutes of freeze cycle?

Freeze-Time Correction Operation

[ ] [ ] 34) Has Freeze-Time Correction been activated?

("POWER OK" LED blinking).

[ ] [ ] 35) Has more than 1 Freeze-Time Correction been

activated? (POWER OK" LED and "EXT HARVEST" LED blinking).

Note: Make copies of this form and use it when diagnosing a freeze up condition. Submit a completed copy of the checklist

along with the freeze-up labor claim form.

III. Controls and Adjustments

• A Hoshizaki exclusive control board is employed in the KMS-2000MLJ series.

• All models are pretested and factory adjusted.

• For a control board check procedure, see "II.D. Control Board Check."

NOTICE

• Fragile, handle very carefully.

• The control board contains integrated circuits, which are susceptible to failure due to static discharge. It is especially important to touch the metal part of the icemaker when handling or replacing the control board.

• Do not touch the electronic devices on the control board or the back of the control board.

• Do not change wiring and connections. Do not misconnect terminals.

• Do not short out power supply to test for voltage.

• Always replace the whole control board assembly if it goes bad.

A. Control Board Layout

• Bin Control Switch Closed LED (green)

• "ALARM RESET" Button

"J" Control Board

• S4 Dip Switch

• "OUTPUT TEST" Button

(used to test relays on control board)

• Bin Control Switch Open LED (yellow)

• Alarm Buzzer

• Ext. Harvest LED (yellow) (blinks

when 3rd occurence of freeze time correction initiates within 36 hr.)

• POWER OK LED (red) (lights when

10.5VAC is supplied to K2 connector)

• Relay LEDs

(4) (indicate which relays are energized and which K1 connector pins are energized

• LED 2 (X2 Relay)

LED 2 on: K1 Connector Pin #2 LED 2 off: K1 Connector Pin #3

• LED 3 (X3 Relay)

LED 3 on: K1 Connector Pin #5 LED 3 off: K1 Connector Pin #4 (energized in freeze)

• LED 4 (X4 Relay) K1 Connector Pin #6

• LED 1 (X1 Relay)

K1 Connector Pin #1, #9

• K3 (white) Connector

Thermistor (harvest control and high temperature safety)

• K4 (red) Connector

Bin Control

• S5 Dip Switch

• K5 (black) Connector

Float Switch (water level)

• Part Number

• K1 Connector

Pins #1 through #10 #1, 9 Magnetic Contactor #2 Hot Gas Valve, X10, X12 Relay #3 Liquid Line Valves #4 Pump Motor #5 Pump Motor (harvest pump timer and pump-out), DV (in pump-out) #6 Inlet Water Valve, X11 Relay #7, 10 Component Power Supply #8 Open

• K2 Connector

Control Transformer (10.5VAC)

"J" Control Board

Part Number 2A7664-02

B. LED Lights and Audible Alarm Safeties

Beep occurs and red CB "POWER OK" LED turns on when control switch is moved to "ICE" position.

Sequence

Green LEDs 1 through 4 turn on and sequence from initial startup as listed in the table below. Order of green LEDs from the outer edge of control board is 1, 4, 3, 2.

Sequence Step LED

1-Minute Fill Cycle 4 WV Harvest Cycle 1, 4, 2 Comp, FM*, FMRs, HGVs, WV 1 minute 20 minutes Harvest Pump Time

(harvest assist) Freeze Cycle 1 Comp, FM/FMRs, PM, LLVs 5 minutes freeze timer

Anti-Slush Control 1, 3 Comp, FM/FMRs, LLVs If S5 dip switch 5 on,

Pump-Out Cycle 1, 4 *FM energized if on K1 Connector Pin #9;

1, 3, 2 Comp, FM*, FMRs, HGVs, PM 0 seconds 50 seconds

†

, 3, 2 Comp, FM*, FMRs, HGVs, PM, WV †, DV 10 seconds 20 seconds

†

pump-out timer setting

Energized

Components

Time LEDs are On

Min. Max.

setting

PM off 10 sec. when thermistor at 36°F (2.2°C)

Alarms

Type Alarm Notes

Beep

LED Blink Freeze-Time Correction

To reset above safeties, press "ALARM RESET" button with power supply on.

6 Low Voltage

7 High Voltage

High Evaporator Temp. (temperature > 127°F) (53°C)

Harvest Backup Timer (harvest > 20 min. for two cycles in a row)

Freeze Timer (freeze > freeze timer setting for two cycles in a row)

(maximum freeze time differential exceeded)

(92Vac±5% or less)

(147Vac±5% or more)

Check for harvest problem (stuck HGV or relay), hot water entering unit, stuck HM, or shorted thermistor.

Check thermistor (open), HGV not opening, TXV or LLV leaking by, low charge, inefficient Comp, or WRV leaking by.

Check FS stuck closed (up), WV leaking by, HGV leaking by, PM not pumping, TXV defective, LLV not opening, low charge, HMnot bypassing, or inefficient Comp.

Red POWER OK LED blinks. After 3freeze-time correction cycles in 36hours, yellow EXT HARVEST LED also blinks. Fill out freeze-up checklist. See "II.J. Freeze-Up Check List."

Red POWER OK LED turns off if voltage protection operates. Control voltage safeties automatically reset when voltage is corrected.

Legend: Comp–compressor; FM–fan motor; FMR–fan motor remote; FS–oat switch;

HGVs–hot gas valves; HM–headmaster (C.P.R.); LLVs–liquid line valves; PM–pump motor; TXV–thermostatic expansion valve; WRV–water regulating valve; WV–inlet water valve

Test

To perform output test, move control switch to "ICE" position. Press "OUTPUT TEST" button. Correct green LED lighting sequence is 1, 4, 3, 2. Components (e.g., compressor) cycle during test. Following test, appliance resumes operation.

Dip switches must be adjusted per unit’s service manual or Hoshizaki Technical Support recommendation. S4 dip switch 8 must remain off.

C. Settings and Adjustments

NOTICE

Dip switches are factory set. Failure to maintain factory settings may adversely affect performance and warranty coverage. For more information, contact Hoshizaki Technical Support at 1-800-233-1940.

1. Default Dip Switch Settings

The dip switches are factory-adjusted to the following positions:

S4 Dip Switch

Dip Switch No. 1 2 3 4 5 6 7 8 9 10

KMS-2000MLJ OFF OFF OFF OFF OFF OFF ON OFF OFF OFF

S5 Dip Switch (Do Not Adjust)

Dip Switch No.

KMS-2000MLJ OFF OFF OFF OFF OFF

S4 Dip Switch

1 2 3 4 5

Freeze Timer (9 & 10)

1 2 3 4 5 6 7 8 9 10

Factory Use (8)

Harvest Pump Time (Harvest Assist)/Freeze-Time Correction (7) (Do Not Adjust)

Harvest Pump Time (Harvest Assist Duration) (6) (Do Not Adjust)

Pump-Out Frequency Control (5)

Pump-Out Time/Harvest Time During Pump-Out (3 & 4)

Harvest Timer (1 & 2)

S5 Dip Switch

Do Not Adjust

Anti-Slush (5)

Minimum Harvest Time (4)

Rell Counter (2 and 3)

Float Switch Selector (1)

1 2 3 4 5

2. Harvest Timer (S4 dip switch 1 & 2)

The harvest timer starts counting when the thermistor reaches 48°F (9°C) at the evaporator outlet and the control board reads 3.9 kΩ from the thermistor. The harvest timer is factory set, and generally no adjustment is required. However, a setting longer than the factory setting may be advised in cases where the drain provided at harvest needs to be prolonged for extra cleaning. Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations. Keep in mind that setting the harvest timer to a longer setting decreases 24-hour production. Note that the pump-out timer (S4 dip switch 3 & 4) acts in place of the harvest timer during cycles with a pump out. For details, see "III.C.3. Pump-Out Timer/Harvest Time During Pump-Out (S4 dip switch 3& 4)."

Note: On models with a pump-out every cycle, the harvest timer is only relevant during

the initial harvest cycle since a pump out occurs every cycle thereafter.

S4 Dip Switch Setting Time

No. 1 No. 2

OFF OFF 60

ON OFF 90

OFF ON 120

ON ON 180

(sec.)

3. Pump-Out Timer/Harvest Time During Pump-Out (S4 dip switch 3 & 4)

NOTICE

On models with harvest pump timer, do not adjust 3 off and 4 on. Pump does not run in pump-out rotation in this setting.

When a pump-out is called for, the pump motor stops for 2 sec. After 2 sec. the drain valve and pump motor energize. Water is removed from the bottom of the water tank and sent down the drain. The pump-out drains the water tank for the time determined by the pump-out timer. The pump-out timer also acts in place of the harvest timer during cycles with a pump-out. The pump-out timer is factory set, and generally no adjustment is required. However, where water quality is bad and the icemaker needs a longer pump-out time, the pump-out timer can be adjusted. The pump-out timer control can be set to pump-out for 10 or 20 sec.

S4 Dip Switch Setting Time (sec.)

T1 T2

No. 3 No. 4

OFF OFF 10 150 100 Closed Closed

ON OFF 10 180 130 Closed Closed

OFF ON 10 120 70 Open Closed

ON ON 20 180 180 Closed Closed

S5-4 OFF S5-4 ON S5-4 OFF S5-4 ON

Inlet Water

Valve

T1: Time to drain the water tank T2: Harvest timer at pump out

4. Pump-Out Frequency Control (S4 dip switch 5)

The pump-out frequency control is factory set to drain the water tank every 10 cycles. Generally no adjustment is required. However, where water quality is bad and the icemaker needs a pump-out more often, the pump-out frequency can be adjusted. The pump-out frequency control can be set to have a pump-out occur every cycle, or every 10 cycles.

The rst pump-out is dependent on S4 dip switch 5. See the table below.

S4 Dip Switch Setting

No. 5

OFF Every 10 cycles After 11th freeze cycle

ON Every cycle After 2nd freeze cycle

Pump-Out Frequency 1st Pump-Out

5. Harvest Pump Time (Harvest Assist Duration) (S4 dip switch 6)

NOTICE

Factory set for proper operation. Do not adjust. Adjustment outside of the factory default setting may result in damage to the appliance.

Harvest pump time (harvest assist duration) is only active when S4 dip switch 7 is in the "ON" position. In the factory default position, the harvest pump time (harvest assist duration) starts with 50sec. left to go in harvest cycle (S4 dip switch 6) and after the thermistor reaches 48°F (9°C) at the evaporator outlet and the control board reads

3.9kΩ from the thermistor. The harvest pump time (harvest assist duration) is factory set, and no adjustment is required.

Harvest Pump Time

S4 Dip Switch Setting

No. 6 S5-4 OFF S5-4 ON

OFF 50 sec. 25 sec.

ON 25 sec. 15 sec.

(Harvest Assist Duration)

6. Harvest Pump Time (Harvest Assist)/Freeze-Time Correction (S4 dip switch 7)

NOTICE

Factory set for proper operation. Do not adjust. Adjustment outside of the factory default setting may result in damage to the appliance.

a) Harvest Pump Time (Harvest Assist)

Depending on S4 dip switch 7 setting, the pump motor either stays off or is energized during the last seconds of the harvest cycle. When the pump motor is energized (S4 dip switch 7 on), water circulates over the evaporator. The harvest water valve is open during harvest for a maximum of 6 minutes or the length of harvest minus the harvest pump time value (S4 dip switch 6), whichever is shorter.

When S4 dip switch 7 is in the on position and harvest begins, X11 and X10 relays energize. A latching circuit is created through the X11 and X10 relays. For further details, see "VIII.B. Wiring Diagram." In the factory default position, 50 sec. before harvest termination, LED 4 turns off, inlet water valve and X11 relay de-energize. X10 relay remains energized through the latching circuit. Next, LED 3 turns on and control board K1connector pin #5 (DBU wire) energizes, energizing the pump motor for the last seconds of harvest. Harvest pump time adjusted by S4 dip switch 1 & 2 and S5 dip switch 4settings. Contact Technical Support before adjusted these settings.

b) Freeze-Time Correction

When S4 dip switch 7 is in the on position, freeze-time correction enabled. See "II.C. Freeze-Time Correction Cycle (90 min.)."

S4 Dip Switch Setting

No. 7

OFF Disabled

ON Enabled

Harvest Pump Time

(Harvest Assist)

Freeze-Time Correction

7. Factory Use (S4 dip switch 8)

Factory set for proper operation. Do not adjust. This must be left in the factory default position.

8. Freeze Timer (S4 dip switch 9 & 10)

NOTICE

Adjust to proper specication, or the icemaker may not operate correctly.

The freeze timer setting determines the maximum allowed freeze time to prevent possible freeze-up issues. Upon termination of the freeze timer, the control board initiates the harvest cycle or pump-out cycle. After 2 consecutive freeze timer terminations, the control board shuts down the icemaker. In this case, see "II.I.3. Low Ice Production" for possible solutions. The freeze timer is factory set and no adjustment is required. Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations.

S4 Dip Switch Setting Time

No. 9 No. 10

OFF OFF 60

OFF ON 50

ON OFF 70

ON ON 75

(min.)

9. Float Switch Control Selector (S5 dip switch 1)

NOTICE

Do not adjust. This must be left in the factory default position or the icemaker will not operate correctly.

This dip switch setting allows use of this control board in single and dual oat switch models. This model uses a single oat switch style.

S5 Dip Switch Setting

OFF Lower Float Switch Enabled

ON Upper Float Switch Enabled

Upper or Lower Float Switch

ControlNo. 1

10. Rell Counter (S5 dip switch 2 and 3)

NOTICE

Do not adjust. These must be left in the factory default position or the icemaker will not operate correctly.

S5 Dip Switch Setting Rell

No. 2 No. 3

OFF OFF 0

OFF ON 1 rell

ON OFF 9 rells

ON ON 10 rells

Counter

11. Minimum Harvest Time (S5 dip switch 4)

NOTICE

Factory set for proper operation. Do not adjust. Adjustment outside the factory default setting may result in damage to the appliance.

S5 Dip Switch Setting Minimum

No. 4

OFF 120 sec.

ON 70 sec.

Harvest Timer

12. Anti-Slush (S5 dip switch 5)

NOTICE

Factory set for proper operation. Do not adjust. Adjustment outside the factory default setting may result in damage to the appliance.

This dip switch setting provides anti-slush control during the freeze cycle. When the evaporator temperature reaches 36°F (2.2°C) the control board reads a 5.8 kΩ signal from the thermistor and de-energizes the water pump for 10 sec. to melt ice slush and prevent ice slush from blocking the water supply tubing, causing irregular freeze patterns.

S5 Dip Switch Setting

Anti-SlushNo. 5

OFF Disabled

ON Enabled

IV. Refrigeration Circuit and Component Service Information

WARNING

• This appliance should be diagnosed and repaired only by qualied service personnel to reduce the risk of death, electric shock, serious injury, or re.

• Before servicing the KMS or SRK: Move the KMS control switch to the "OFF" position and turn off the power supply to the SRK condensing unit. Place the KMS disconnect (if applicable) in the "OFF" position. Lockout/Tagout to prevent the power supply from being turned back on inadvertently.

• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after the icemaker is serviced. Make sure that none have fallen into the dispenser unit/ice storage bin.

• Make sure all food zones in the icemaker and dispenser unit/ice storage bin are clean after service.

A. Refrigeration Circuit Service Information

WARNING

• Repairs requiring the refrigeration circuit to be opened must be performed by properly trained and EPA-certied service personnel.

• Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of refrigerant to the system (if using an electronic leak detector), and then raise the pressure using nitrogen gas (140 PSIG). Do not use R-404A as a mixture with pressurized air for leak testing.

NOTICE

• Always recover the refrigerant and store it in an approved container. Do not discharge the refrigerant into the atmosphere.

• Do not leave the system open for longer than 15 min. when replacing or servicing parts. The Polyol Ester (POE) oils used in R-404A applications can absorb moisture quickly. Therefore it is important to prevent moisture from entering the system when replacing or servicing parts.

• Always install a new drier every time the sealed refrigeration system is opened. Do not replace the drier until after all other repair or replacement has been made. Install the new drier with the arrow on the drier in the direction of the refrigerant ow.

• When brazing, protect the drier by using a wet cloth to prevent the drier from overheating. Do not allow the drier to exceed 250°F (121°C).

1. Refrigerant Recovery

The condensing unit and icemaker are provided with refrigerant shutoff valves. Using proper refrigerant practices, recover the refrigerant. Recovery via the condensing unit's refrigerant shutoff valves is recommended. Store the refrigerant in an approved container. Do not discharge the refrigerant into the atmosphere.

2. Brazing

WARNING

• R-404A itself is not ammable at atmospheric pressure and temperatures up to 176°F (80°C).

• R-404A itself is not explosive or poisonous. However, when exposed to high temperatures (open ames), R-404A can be decomposed to form hydrouoric acid and carbonyl uoride both of which are hazardous.

• Do not use silver alloy or copper alloy containing arsenic.

1) Braze all ttings while purging with nitrogen gas owing at a pressure of 3 to 4 PSIG. Note: Because the pipes in the evaporator case are specially coated to resist corrosion,

it is important to make connections outside the evaporator case when possible. Ifit is necessary to braze inside the evaporator case, use sandpaper to remove the coating from the brazing connections before unbrazing the components.

NOTICE

• Always install a new drier every time the sealed refrigeration system is opened.

• Do not replace the drier until after all other repair or replacement has been made.

Install the new drier with the arrow on the drier in the direction of the refrigerant ow.

• When brazing, protect the drier by using a wet cloth to prevent the drier from

overheating. Do not allow the drier to exceed 250°F (121°C).

2) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of refrigerant to the system (if using an electronic leak detector), and then raise the pressure using nitrogen gas (140 PSIG). Do not use R-404A as a mixture with pressurized air for leak testing.

3. Evacuation and Recharge (R-404A)

The condensing unit and icemaker are provided with refrigerant shutoff valves. Evacuation and recharge via the condensing unit's refrigerant shutoff valves is recommended.

1) Attach a vacuum pump to the system. Be sure to connect the charging hoses to both high and low-side refrigerant shutoff valves.

IMPORTANT

The vacuum level and vacuum pump may be the same as those for current refrigerants. However, the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for POE oils.

2) Turn on the vacuum pump. Open the gauge manifold valves, then open the high and low-side refrigerant shutoff valves. Never allow the oil in the vacuum pump to ow backwards.

3) Allow the vacuum pump to pull down to a 29.9" Hg vacuum. Evacuating period depends on pump capacity.

4) Close the low-side valve and high-side valve on the gauge manifold.

5) Disconnect the gauge manifold hose from the vacuum pump and attach it to a refrigerant service cylinder. Remember to loosen the connection and purge the air from the hose. For the required refrigerant charge, see the nameplate on the condensing unit or the rating label inside the icemaker. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 (latest edition) be used.

6) A liquid charge is required when charging an R-404A system (to prevent fractionation). Place the service cylinder on the scales; if the service cylinder is not equipped with a dip tube, invert the service cylinder, then place it on the scales. Open the high-side valve on the gauge manifold.

7) Allow the system to charge with liquid until the proper charge weight is met.

8) If necessary, add any remaining charge to the system through the low-side.

NOTICE!To prevent compressor damage, use a throttling valve or liquid dispensing device to add the remaining liquid charge through the low-side shutoff valve with the icemaker running.

9) Close the high and low-side shutoff valves. Close the high and low-side gauge manifold valves, then disconnect the gauge manifold hoses.

10) Cap the shutoff valves to prevent a possible leak.

B. Component Service Information

NOTICE

When replacing a component listed below, see the notes to help ensure proper operation.

Component Notes

Compressor 1 Phase SRK: Install a new start capacitor, run capacitor, and start relay.

3 Phase SRK: Install a new magnetic contactor.

Thermostatic Expansion Valves

Hot Gas Valves Liquid Line Valves

Fan Motors Install a new capacitor.

Pump Motor Install a new capacitor.

• Attach the thermostatic expansion valve bulb to the suction line in the same location as the previous bulb.

• The bulb should be between the 10 and 2 o'clock positions on the tube.

• Secure the bulb with the clamp and holder, then insulate it.

• Replace the strainer if applicable.

• Use copper tube of the same diameter and length when replacing valve lines.

V. Maintenance

The maintenance schedule below is a guideline. More frequent maintenance may be required depending on water quality, the appliance's environment, and local sanitation regulations

WARNING

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

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

• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after any maintenance is done to the icemaker. Make sure that none have fallen into the dispenser unit/ice storage bin.

Maintenance Schedule

Frequency Area Task

Daily Scoop Clean the ice scoop using a neutral cleaner. Rinse thoroughly after

cleaning.

Monthly External Water

Filters Icemaker Exterior Wipe down with a clean, soft cloth. Use a damp cloth containing a

Yearly Icemaker and

Dispenser Unit/Ice Storage Bin Liner

Water Supply Inlet Close the icemaker water supply line shut-off valve and drain the water

Condenser Inspect. Clean if necessary by using a brush or vacuum cleaner. More

Water Hoses Inspect the water hoses and clean/replace if necessary.

Check for proper pressure and change if necessary.

neutral cleaner to wipe off oil or dirt build up. Clean any chlorine staining (rust colored spots) using a non-abrasive cleanser.

Clean and sanitize per the cleaning and sanitizing instructions provided in the instruction manual or maintenance label on the icemaker.

system. Clean the water supply inlet screen.

frequent cleaning may be required depending on location.

VI. Preparing the Appliance for Periods of Non-Use

NOTICE

• When storing the appliance for an extended time or in sub-freezing temperatures, follow the instructions below to prevent damage.

• To prevent damage to the water pump, do not operate the appliance with the control switch in the "SERVICE" position when the water tank is empty.

When the appliance is not used for two or three days under normal conditions, it is sufficient to move the control switch to the "OFF" position. When storing the appliance for an extended time or in sub-freezing temperatures, follow the instructions below.

1. Remove the water from the icemaker water lines:

1) Turn off the power supply, then remove the front panel, right side panel, and control box cover.

2) Move the control switch to the "OFF" position. Conrm the service switch is in the "CIRC" position.

3) Close the icemaker water supply line shut-off valve and open the icemaker water supply line drain valve. Allow the line to drain by gravity.

4) Attach a compressed air or carbon dioxide supply to the icemaker water supply line drain valve.

5) Turn on the power supply, then move the control switch to the "ICE" position. Conrm that the bin control switch is closed and calling for ice. The "POWER OK" LED should be on and not ashing.

6) Blow the icemaker water supply line out using the compressed air or carbon dioxide supply. This will clear water from the inlet water valve.

7) Move the control switch to the "OFF" position.

8) Disconnect the wash valve hose from the inlet water valve tee, then unplug the water pump connector at the water pump. See Fig. 5.

9) Move the service switch to the "WASH" position, then move the control switch to the "SERVICE" position.

10) From the wash valve hose, blow out the wash valve using the compressed air or carbon dioxide supply. Reconnect the wash valve hose.

11) Move the service switch to the "CIRC" position, then move the control switch to the "OFF" position.

12) Disconnect the oat switch vent hose from the drain hose tee. Move the service switch to the "DRAIN" position, then move the control switch to the "SERVICE" position.

13) From the drain hose tee, blow out the drain valve using the compressed air or carbon dioxide supply. Reconnect the oat switch vent hose.

14) Move the service switch to the "CIRC" position, then move the control switch to the "OFF" position.

15) Turn off the power supply, then reconnect the water pump connector.

16) Close the icemaker water supply line drain valve.

2. Remove the water from the water tank:

17) Remove the insulation panel and front frame.

18) Disconnect the hoses connected to the water tank. Allow the tank and hoses to drain completely. See Fig. 6.

19) Remove all ice from the dispenser unit/storage bin and clean the dispenser unit/storage bin liner using a neutral cleaner. Rinse thoroughly after cleaning.

20) Reconnect the hoses to the water tank.

21) Replace all removed parts and panels in their correct positions.

Inlet Water Valve Tee

Front View

Wash Valve Hose

Inlet Water Valve

Wash Valve

Fig. 5

Float Switch Vent Hose

Drain Valve

Drain Hose Tee

Drain Pipe

Pump Suction Hose

Float Connection Hose

Water Tank Drain Hose

Bottom View

Water Tank

Fig. 6

VII. Disposal

The appliance contains refrigerant and must be disposed of in accordance with applicable national, state, and local codes and regulations. Refrigerant must be recovered by properly certied service personnel.

VIII. Technical Information

We reserve the right to make changes in specications and design without prior notice.

A. Specication and Performance Data Sheets

Pressure data is recorded at 5 min. into freezing cycle. The data not in bold should be used for reference only.

1. KMS-2000MLJ with SRK-20J

DATA PENDING

2. KMS-2000MLJ with SRK-20J3

DATA PENDING

3. SRK-20J

DATA PENDING

4. SRK-20J3

DATA PENDING

B. Wiring Diagrams

1. Wire Harness Connections

Neutral

LLV

KMS Icemaker Unit

(factory connected)

P BK

HGV

Fuse 10A

GND

Legend:

CB-control board

GND-ground

HGV-hot gas valve

LLV -liquid line valve

Wire Harness Connections

SRK Condensing Unit

(eld connected)

BR V

GND

LLV

HGV

Fuse 10A

Neutral

Contactor

Wire Color Code:

BK-black

BR-brown

GR-green

P-pink

V-violet

W-white

WIRE COLOR CODE

BK -BLACK

BR -BROWN

DBU -DARK BLUE

GR -GREEN

GY -GRAY

O -ORANGE

P -PINK

R -RED

V -VIOLET

W -WHITE

Y -YELLOW

W/BR -WHITE/BROWN

W/R -WHITE/RED

W/BK -WHITE/BLACK

1A4787-011

SRK (1 PHASE)

208-230/60/1

2. KMS-2000MLJ with SRK-20J

S4 DIP SWITCH SETTING NO. 1 NO. 2 NO. 3 NO. 4 NO. 5 NO. 6 NO. 7 NO. 8 NO. 9 NO. 10

KMS-2000MLJ OFF OFF OFF OFF OFF OFF ON OFF OFF OFF

OFF

X10 - HARVEST PUMP RELAY

X11 - X10 CONTROL RELAY

X12 - PUMP OUT RELAY

KMS-2000MLJ OFF OFF OFF OFF

S5 DIP SWITCH SETTING NO. 1 NO. 2 NO. 3 NO. 4 NO. 5

THERMOSTAT

DISCHARGE LINE

BR BR

HI-PRESSURE

SWITCH

FUSE 10A

BOARD

CONTROL

THERMISTOR

WHITE

(O)

START CAP.

189-227MFD

T3T1NO

RED

(BK)

BIN CONTROL

WIRING

COMP.

40 MFD

CAP.

RUN

START RELAY

BKGYV

BLACK

321

(R)

(BK)

FLOAT SW.

PVBR

FUSE 10A

PVBR

TERMINAL BLOCK

13579

HARNESS

TERMINAL BLOCK

(R)

(BK)

97531

LINE

VALVE

(R)

HOT GAS

VALVE

HOT GAS

VALVE

(BR)

FAN

(W)

(BR)

FAN

(W)

CRANKCASE

HEATER

DBU

(BK)

CONTROL

TRANSFORMER

(R)

GY GY GY GY

115 VAC

10 VAC @

(BK)

(BR)

W W

BK BK

Discharge Line Thermostat Switch

Cut-out 266°F±9°F (130°C± 5°C)

PSIG

* High-Pressure Switch

Cut-out 426±

Cut-in 239°F±9°F (115°C±5°C)

Cut-in 341±22 PSIG

DBU

W/R

DBU

321

123456789

HOT GAS

VALVE

X10X11

Y Y

DBU

8 8

X12

6 4

DBU

W/R

VALVE

LINE

INLET

WATER VALVE

(R)

(DBU)

DRAIN

VALVE

WASH

(Y)

7 5 3 1

5 3 1

7 7 5 3 1

(Y)

PUMP

VALVE

(R)

Y Y

W/R

(R)

W/R

CAP.

10MFD

DBU

BK W

GND

(Y)

CAP.

10MFD

CAP.

10MFD

(BK)

WWW

W W

DBU

OFF OFF

SERSER ICEICE

SERVICE

CONTROL SWITCH

DRAIN

CIRC

SWITCH WASH

GND

MAGNETIC CONTACTOR

COM

W/BK

WIRE COLOR CODE

BK -BLACK

BR -BROWN

DBU -DARK BLUE

GR -GREEN

GY -GRAY

O -ORANGE

P -PINK

R -RED

V -VIOLET

W -WHITE

Y -YELLOW

W/BR -WHITE/BROWN

W/R -WHITE/RED

W/BK -WHITE/BLACK

1A4787-011

SRK (3 PHASE)

208-230/60/1

TRANSFORMER

3. KMS-2000MLJ with SRK-20J3

OFF

KMS-2000MLJ OFF OFF OFF OFF

S4 DIP SWITCH SETTING NO. 1 NO. 2 NO. 3 NO. 4 NO. 5 NO. 6 NO. 7 NO. 8 NO. 9 NO. 10

KMS-2000MLJ OFF OFF OFF OFF OFF OFF ON OFF OFF OFF

S5 DIP SWITCH SETTING NO. 1 NO. 2 NO. 3 NO. 4 NO. 5

X10 - HARVEST PUMP RELAY

BOARD

CONTROL

(O)

THERMISTOR

X11 - X10 CONTROL RELAY

X12 - PUMP OUT RELAY

THERMOSTAT

DISCHARGE LINE

BR BR

HI-PRESSURE

SWITCH

FUSE 10A

GND

T3T1NO

MAGNETIC CONTACTOR

WHITE

BIN CONTROL

W/BK

COM

(BK)(BK)

COMP.

WIRING

RED

321

FLOAT SW.

321

(BK)

BLACK

(R)

FUSE 10A

TERMINAL BLOCK

13579

HARNESS

TERMINAL BLOCK

(BK)

208V

VOLTAGE

TAP SW.

230V

97531

(R)

CRANKCASE

115V

LINE

VALVE

HOT GAS

VALVE

HOT GAS

VALVE

(BR)

FAN

(W)

(BR)

FAN

(W)

HEATER

MAIN

(BK)

(Y)

GND

CAP.

10MFD

DBU

DBU GY

(BK)

115 VAC

10 VAC @

CONTROL

TRANSFORMER

(R)

(BR)

GY GY GY GY

(BK)

BK BK

Discharge Line Thermostat Switch

Cut-out 266°F±9°F (130°C± 5°C)

PSIG

* High-Pressure Switch

Cut-out 426±

Cut-in 239°F±9°F (115°C±5°C)

Cut-in 341±22 PSIG

DBU

W/R

123

DBU

W/R

(R)

Y Y

W/R

CAP.

DBU

321

HOT GAS

VALVE

X10X11

Y Y

DBU

8 8 6

Y O

X12

6 4

DBU

W/R

VALVE

LINE

(R)

INLET

WATER VALVE

(R)

10MFD

(DBU)

DRAIN

VALVE

PUMP

WASH

VALVE

(Y)

7 5 3 1

5 3 1

7 7 5 3 1

(Y)

45678

WWW

DBU

OFF OFF

DBU

SERSER ICEICE

SERVICE

CONTROL SWITCH

DRAIN

CIRC

SWITCH WASH

Hoshizaki KMS2000MLJ User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important Safety Information

I. Construction and Water/Refrigeration Circuit Diagram

A. Construction

1. Icemaker

2. Condensing Unit

B. Water Circuit and Refrigeration Circuit

II. Sequence of Operation and Service Diagnosis

A. Sequence of Operation Flow Chart

1. Operation Flow Chart

2. Shutdown Flow Chart

3. Freeze-Time Correction Chart

B. Service Diagnosis

C. Freeze-Time Correction Cycle (90 min.)

D. Control Board Check

E. Bin Control Check

F. Float Switch Check and Cleaning

G. Thermistor Check

H. Switches

1. Control Switch

2. Service Switch

I. Diagnostic Tables

J. Freeze-Up Check List

III. Controls and Adjustments

A. Control Board Layout

B. LED Lights and Audible Alarm Safeties

C. Settings and Adjustments

1. Default Dip Switch Settings

2. Harvest Timer (S4 dip switch 1 & 2)

3. Pump-Out Timer/Harvest Time During Pump-Out (S4 dip switch 3 & 4)

4. Pump-Out Frequency Control (S4 dip switch 5)

5. Harvest Pump Time (Harvest Assist Duration) (S4 dip switch 6)

6. Harvest Pump Time (Harvest Assist)/Freeze-Time Correction (S4 dip switch 7)

7. Factory Use (S4 dip switch 8)

8. Freeze Timer (S4 dip switch 9 & 10)

9. Float Switch Control Selector (S5 dip switch 1)

11. Minimum Harvest Time (S5 dip switch 4)

12. Anti-Slush (S5 dip switch 5)

IV. Refrigeration Circuit and Component Service Information

A. Refrigeration Circuit Service Information

B. Component Service Information

V. Maintenance

VI. Preparing the Appliance for Periods of Non-Use

VII. Disposal

VIII. Technical Information

1. KMS-2000MLJ with SRK-20J

2. KMS-2000MLJ with SRK-20J3

3. SRK-20J

4. SRK-20J3

B. Wiring Diagrams

1. Wire Harness Connections

2. KMS-2000MLJ with SRK-20J

3. KMS-2000MLJ with SRK-20J3