Hoshizaki American, Inc. KM-1800SAH User manual

Brand: Hoshizaki American, Inc.

Model: KM-1800SAH

Category: Ice cube makers

Type: User manual

This manual is also suitable for

™

SERVICE MANUAL

ISSUED:

November 11, 2005

KM-1800SAH/3

KM-1800SWH/3

KM-1800SRH/3

STACKABLE CRESCENT CUBER

Reliability is a

beautiful thing

REVISED:

December xx, 200x

NUMBER:

73131

IMPORTANT

Only qualiﬁed service technicians should attempt to service or maintain this

icemaker. No such service or maintenance should be undertaken until the

technician has thoroughly read this Service Manual.

HOSHIZAKI provides this manual primarily to assist qualiﬁed service technicians in the

service and maintenance of the icemaker.

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

addressed, please call or write to the HOSHIZAKI Technical Support Department for

assistance.

HOSHIZAKI AMERICA, INC.

618 Highway 74 South

Peachtree City, GA 30269

Attn: HOSHIZAKI Technical Support Department

Phone: 1-800-233-1940 Technical Service

(770) 487-2331

Fax: 1-800-843-1056

(770) 487-3360

Web Site: www.hoshizaki.com

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

following information:

• Model Number

• Serial Number

• Complete and detailed explanation of the problem

Please review this manual. It should be read carefully before the icemaker is serviced or

maintenance operations are performed. Only qualiﬁed service technicians should service

and maintain the icemaker. This manual should be made available to the technician prior to

service or maintenance.

CONTENTS

I. Speciﬁcations ...................................................................................................................... 5

A. Icemaker ....................................................................................................................... 5

1. KM-1800SAH (air-cooled) ....................................................................................... 5

2. KM-1800SAH3 (air-cooled, 3 phase) ....................................................................... 6

3. KM-1800SWH (water-cooled) .................................................................................. 7

4. KM-1800SWH3 (water-cooled, 3 phase) ................................................................. 8

5. KM-1800SRH (remote air-cooled) ........................................................................... 9

6. KM-1800SRH3 (remote air-cooled, 3 phase) ........................................................ 10

B. Condensing Unit .......................................................................................................... 11

1. URC-20F ............................................................................................................... 11

II. General Information ......................................................................................................... 13

A. Construction ................................................................................................................ 13

1. KM-1800SAH/3 ...................................................................................................... 13

2. KM-1800SWH/3 ..................................................................................................... 14

3. KM-1800SRH/3 ..................................................................................................... 15

B. Controller Board .......................................................................................................... 16

1. Solid-State Control ................................................................................................ 16

2. Controller Board .................................................................................................... 16

3. Sequence .............................................................................................................. 20

4. Controls and Adjustments ..................................................................................... 23

5. Checking the Controller Board .............................................................................. 26

III. Technical Information ...................................................................................................... 27

A. Water Circuit and Refrigerant Circuit ........................................................................... 27

1. KM-1800SAH/3 ...................................................................................................... 27

2. KM-1800SWH/3 ..................................................................................................... 28

3. KM-1800SRH/3 ..................................................................................................... 29

B. Wiring Diagrams .......................................................................................................... 30

1. KM-1800SAH .................................................................................................. 30

2. KM-1800SAH3 ....................................................................................................... 31

3. KM-1800SWH, KM-1800SRH ............................................................................... 32

4. KM-1800SWH3, KM-1800SRH3 ........................................................................... 33

C. Timing Chart ............................................................................................................... 34

D. Performance Data ....................................................................................................... 36

1. KM-1800SAH ......................................................................................................... 36

2. KM-1800SAH3 ....................................................................................................... 37

3. KM-1800SWH ........................................................................................................ 38

4. KM-1800SWH3 ...................................................................................................... 39

5. KM-1800SRH ........................................................................................................ 40

6. KM-1800SRH3 ...................................................................................................... 41

IV. Service Diagnosis ........................................................................................................... 42

A. No Ice Production ....................................................................................................... 42

B. Evaporator is Frozen Up ............................................................................................. 45

C. Low Ice Production ..................................................................................................... 46

D. Abnormal Ice ............................................................................................................... 46

E. Other ........................................................................................................................... 47

V. Removal and Replacement of Components .................................................................... 48

A. Service for Refrigerant Lines ...................................................................................... 48

1. Refrigerant Recovery ............................................................................................. 48

2. Evacuation and Recharge [R-404A] ...................................................................... 48

B. Brazing ........................................................................................................................ 49

C. Removal and Replacement of Compressor ................................................................ 49

D. Removal and Replacement of Drier ............................................................................ 50

E. Removal and Replacement of Expansion Valve .......................................................... 51

F. Removal and Replacement of Hot Gas Valve, Line Valve and Gas Valve .................... 52

G. Removal and Replacement of Evaporator .................................................................. 53

H. Removal and Replacement of Thermistor ................................................................... 53

I. Removal and Replacement of Fan Motor ..................................................................... 54

J. Removal and Replacement of Water Valve .................................................................. 54

K. Removal and Replacement of Pump Motor ................................................................ 55

L. Removal and Replacement of Spray Tubes ................................................................. 55

M. Removal and Replacement of Water Regulating Valve – Water-Cooled Model Only . 56

N. Adjustment Of Water Regulating Valve – Water-Cooled Model Only .......................... 57

O. Removal and Replacement of Condensing Pressure Regulator (C.P.R.) –

Remote Air-Cooled Model Only .................................................................................. 58

VI. Cleaning and Maintenance ............................................................................................. 59

A. Preparing the Icemaker for Long Storage ................................................................... 59

B. Cleaning and Sanitizing Instructions ........................................................................... 60

1. Cleaning Procedure ............................................................................................... 61

2. Sanitizing Procedure - Following Cleaning Procedure .......................................... 62

C. Maintenance ............................................................................................................... 63

I. Speciﬁcations

A. Icemaker

1. KM-1800SAH (air-cooled)

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V)

AMPERAGE 18 A ( 5 Min. Freeze AT 104°F / WT 80°F)

MINIMUM CIRCUIT AMPACITY 30 A

MAXIMUM FUSE SIZE 30 A

APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F)

PER 24 HR. Temp.(°F) 50 70 90

lbs./day ( kg/day ) 70 *1756 (797) 1685 (764) 1589 (721)

Reference without *marks 80 1702 (772) 1592 (722) 1496 (679)

90 1685 (764) *1514 (687) 1416 (642)

100 1579 (716) 1491 (676) 1326 (601)

SHAPE OF ICE Crescent Cube

ICE PRODUCTION PER CYCLE 42.9lbs. (19.4 kg) 2160 pcs.

APPROXIMATE STORAGE CAPACITY N/A

ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F

ELECTRIC W (kWH/100 lbs.) 2979 (4.9) 2780 (3.8)

WATER gal./24HR (gal./100 lbs.) 348 (23.0) 680 (38.7)

EXTERIOR DIMENSIONS (WxDxH) 48" x 27 3/8" x 36 7/16" (1219 x 695 x 925 mm)

EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear)

WEIGHT Net 344 lbs. ( 156 kg ), Shipping 440 lbs. ( 200 kg )

CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

- CONDENSATE DRAIN 3/8" OD Pipe

CUBE CONTROL SYSTEM Float Switch

HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer

ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe

COOLING WATER CONTROL N/A

BIN CONTROL SYSTEM Thermostat

COMPRESSOR Hermetic, Model CS18K6E-PFV-237

CONDENSER Air-cooled, Fin and Tube Type

EVAPORATOR Vertical type, Stainless Steel and Copper

REFRIGERANT CONTROL Thermostatic Expansion Valve

REFRIGERANT CHARGE R-404A, 4 lb. 7 oz. ( 2000 g )

DESIGN PRESSURE High 467 PSIG, Low 230 PSIG

P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal )

COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal )

REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch

LOW WATER PROTECTION Float Switch

ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin

OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F

WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

We reserve the right to make changes in speciﬁcations and design without prior notice.

2. KM-1800SAH3 (air-cooled, 3 phase)

AC SUPPLY VOLTAGE 208-230/60/3

AMPERAGE 11 A ( 5 Min. Freeze AT 104°F / WT 80°F)

MINIMUM CIRCUIT AMPACITY 20 A

MAXIMUM FUSE SIZE 20 A

APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F)

PER 24 HR. Temp.(°F) 50 70 90

lbs./day ( kg/day ) 70 *1757 (797) 1683 (764) 1597 (724)

Reference without *marks 80 1701 (772) 1587 (720) 1507 (684)

90 1683 (764) *1506 (683) 1422 (645)

100 1579 (716) 1486 (674) 1344 (610)

SHAPE OF ICE Crescent Cube

ICE PRODUCTION PER CYCLE 42.9 lbs. (19.4 kg) 2160 pcs.

APPROXIMATE STORAGE CAPACITY N/A

ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F

ELECTRIC W (kWH/100 lbs.) 2949 (4.7) 2562 (3.5)

WATER gal./24HR (gal./100 lbs.) 328 (21.8) 694 (39.5)

EXTERIOR DIMENSIONS (WxDxH) 48" x 27 3/8" x 36 7/16" (1219 x 695 x 925 mm)

EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear)

WEIGHT Net 344 lbs. ( 156 kg ), Shipping 440 lbs. ( 200 kg )

CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

- CONDENSATE DRAIN 3/8" OD Pipe

CUBE CONTROL SYSTEM Float Switch

HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer

ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe

COOLING WATER CONTROL N/A

BIN CONTROL SYSTEM Thermostat

COMPRESSOR Hermetic, Model CS18K6E-PFV-237

CONDENSER Air-cooled, Fin and Tube Type

EVAPORATOR Vertical type, Stainless Steel and Copper

REFRIGERANT CONTROL Thermostatic Expansion Valve

REFRIGERANT CHARGE R-404A, 4 lb. 7 oz. ( 2000 g )

DESIGN PRESSURE High 467 PSIG, Low 230 PSIG

P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal )

COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal )

REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch

LOW WATER PROTECTION Float Switch

ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin

OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F

WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

We reserve the right to make changes in speciﬁcations and design without prior notice.

3. KM-1800SWH (water-cooled)

We reserve the right to make changes in speciﬁcations and design without prior notice.

No Data Available

4. KM-1800SWH3 (water-cooled, 3 phase)

We reserve the right to make changes in speciﬁcations and design without prior notice.

No Data Available

5. KM-1800SRH (remote air-cooled)

We reserve the right to make changes in speciﬁcations and design without prior notice.

SPECIFICATION NO. 05A001 ISSUED: 8/26/2005

ITEM: HOSHIZAKI STACKABLE CRESCENT CUBER

MODEL: KM-1800SRH

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V)

AMPERAGE 16.5 A ( 5 Min. Freeze AT 104°F / WT 80°F)

MINIMUM CIRCUIT AMPACITY 30 A

MAXIMUM FUSE SIZE 30 A

APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F)

PER 24 HR. Temp.(°F) 50 70 90

lbs./day ( kg/day ) 70 *1817 (824) 1768 (802) 1643 (745)

Reference without *marks 80 1780 (807) 1704 (773) 1546 (701)

90 1768 (802) *1651 (749) 1504 (682)

100 1723 (782) 1617 (733) 1369 (621)

SHAPE OF ICE Crescent Cube

ICE PRODUCTION PER CYCLE 47.8 lbs. (21.7 kg) 2160 pcs.

APPROXIMATE STORAGE CAPACITY N/A

ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F

ELECTRIC W (kWH/100 lbs.) 2890(4.2) 2730(3.6)

WATER gal./24HR (gal./100 lbs.) 439(26.6) 721(39.7)

EXTERIOR DIMENSIONS (WxDxH) 48" x 27 3/8" x 36 7/16" (1219 x 695 x 925 mm)

EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear)

WEIGHT Net 344 lbs. (156 kg), Shipping 440 lbs. (200 kg)

CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

- CONDENSATE DRAIN 3/8" OD Pipe

CUBE CONTROL SYSTEM Float Switch

HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer

ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe

COOLING WATER CONTROL N/A

BIN CONTROL SYSTEM Thermostat

COMPRESSOR Hermetic, Model CS18K6E-PFV

CONDENSER Air-Cooled Remote, Condenser Unit URC-20F

EVAPORATOR Vertical type, Stainless Steel and Copper

REFRIGERANT CONTROL Thermostatic Expansion Valve

Condensing Pressure Regulator on URC-20F (210 PSI Set)

REFRIGERANT CHARGE R-404A, 15 lb. 7.0 oz. (7,000g)

(Icemaker 7 lbs. 12.0 oz. Cond. Unit 7 lb. 11.0 oz.)

DESIGN PRESSURE High 467PSIG, Low 230PSIG

P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal )

COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal )

REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch

LOW WATER PROTECTION Float Switch

ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin, Remote Condenser Unit

OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F

WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

DRAWING NO. (DIMENSION) 3A3453

We reserve the right to make changes in specifications and design without prior notice.

APPROVED CHECKED WRITTEN

TGray

8/26/2005

ENG.F-011.1.0205

6. KM-1800SRH3 (remote air-cooled, 3 phase)

We reserve the right to make changes in speciﬁcations and design without prior notice.

SPECIFICATION NO. 05A002 ISSUED: 10/3/2005

ITEM: HOSHIZAKI STACKABLE CRESCENT CUBER

MODEL: KM-1800SRH3

AC SUPPLY VOLTAGE 208-230/60/3

AMPERAGE 10.9 A ( 5 Min. Freeze AT 104°F / WT 80°F)

MINIMUM CIRCUIT AMPACITY 20 A

MAXIMUM FUSE SIZE 20 A

APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F)

PER 24 HR. Temp.(°F) 50 70 90

lbs./day ( kg/day ) 70 *1775 (805) 1722 (781) 1618 (734)

Reference without *marks 80 1735 (787) 1653 (750) 1531 (695)

90 1722 (781) *1595 (723) 1479 (671)

100 1691 (767) 1568 (711) 1372 (622)

SHAPE OF ICE Crescent Cube

ICE PRODUCTION PER CYCLE 47.7 lbs. (21.7 kg) 2160 pcs.

APPROXIMATE STORAGE CAPACITY N/A

ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F

ELECTRIC W (kWH/100 lbs.) 2860(4.3) 2660(3.6)

WATER gal./24HR (gal./100 lbs.) 456(28.6) 774(43.6)

EXTERIOR DIMENSIONS (WxDxH) 48" x 27 3/8" x 36 7/16" (1219 x 695 x 925 mm)

EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear)

WEIGHT Net 344 lbs. (156 kg), Shipping 440 lbs. (200 kg)

CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

- CONDENSATE DRAIN 3/8" OD Pipe

CUBE CONTROL SYSTEM Float Switch

HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer

ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe

COOLING WATER CONTROL N/A

BIN CONTROL SYSTEM Thermostat

COMPRESSOR Hermetic, Model CS18K6E-TF5

CONDENSER Air-Cooled Remote, Condenser Unit URC-20F

EVAPORATOR Vertical type, Stainless Steel and Copper

REFRIGERANT CONTROL Thermostatic Expansion Valve

Condensing Pressure Regulator on URC-20F (210 PSI Set)

REFRIGERANT CHARGE R-404A, 15 lb. 7.0 oz. (7,000g)

(Icemaker 7 lbs. 12.0 oz. Cond. Unit 7 lb. 11.0 oz.)

DESIGN PRESSURE High 467 PSIG, Low 230 PSIG

P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal )

COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal )

REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch

LOW WATER PROTECTION Float Switch

ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin, Remote Condenser Unit

OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F

WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

DRAWING NO. (DIMENSION) 3A3453

We reserve the right to make changes in specifications and design without prior notice.

APPROVED CHECKED WRITTEN

TGray

10/3/05

ENG.F-011.1.0205

B. Condensing Unit

1. URC-20F

SPECIFICATIONS

MODEL: URC-20F

EXTERIOR Galvanized Steel

DIMENSIONS (W × D × H) 46 - 3/8” × 15 - 11/16” × 25 - 15/16”

(1178 × 398 × 659 mm)

REFRIGERANT CHARGE R404A 7 lbs. 11 oz. (3500 g)

WEIGHT Net 104 lbs. (47 kg)

Shipping 150 lbs. (52 kg)

CONNECTIONS

REFRIGERANT One Shot Couplings (Parker)

ELECTRICAL Permanent Connection

CONDENSER Air-Cooled

HEAD PRESSURE CONTROL

Condensing Pressure Regulator

AMBIENT CONDITION Min. -20°F to Max. +122°F

(-29°C to +50°C)

Outdoor Use

II. General Information

A. Construction

1. KM-1800SAH/3

Spray Tubes

Water Supply Inlet

Water Valve

Hot Gas Valve

Junction Box

Check Valves (3)

Condenser

Condenser Fan

Motors (2)

Drier

Line Valve

Capacitor Box

(KM-1800SAH)

Transformer Box

(KM-1800SAH3)

Control Box

Control Switch

Bin Control

Thermostat

Compressor

Expansion Valves (3)

Interlock

Switch

Float Switch

Water Pump

2. KM-1800SWH/3

Evaporator Spray Tubes Water Valve

Expansion Valves (3) Water Supply Inlet

Check Valves (3)

Hot Gas Valve

Junction Box

Control Box

Water-cooled

Condenser

Line Valve

Water Regulator

Water Pump

Float Switch

Cleaning Valve

Drier

Compressor

Control Switch Bin Control Thermostat

Capacitor Box

(KM-1800SWH)

Transformer Box

(KM-1800SWH3)

3. KM-1800SRH/3

Evaporator Spray Tubes Water Valve

Expansion Valves (3) Water Supply Inlet

Check Valves (3)

Hot Gas Valve

Junction Box

Control Box

Receiver Tank

Water Pump

Line Valve

Float Switch

Cleaning Valve

Drier

Compressor

Control Switch Bin Control Thermostat

Capacitor Box

(KM-1800SRH)

Transformer Box

(KM-1800SRH3)

B. Controller Board

1. Solid-State Control

• A HOSHIZAKI exclusive solid-state control is employed in KM-1800SAH/3,

KM-1800SWH/3 and KM-1800SRH/3 Stackable Crescent Cubers.

• A printed circuit board (hereafter called "controller board") includes a stable and high

quality control system.

• All models are pretested and factory-adjusted.

2. Controller Board

CAUTION

1. Fragile, handle very carefully.

2. A controller board contains integrated circuits, which are susceptible to failure

due to static discharge. It is especially important to touch the metal part of

the unit when handling or replacing the board.

3. Do not touch the electronic devices on the board or the back of the board to

prevent damage to the board.

4. Do not change wiring and connections. Do not misconnect K3, K4 and K5,

because the same connector is used for the thermistor and ﬂoat switch. K4 is

not connected.

5. Always replace the whole board assembly if it goes bad.

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

Features of Control Products "E" Controller Board

a) Maximum Water Supply Period - 6 minutes

Water solenoid valve opening, in the defrost (harvest) cycle, is limited by the defrost

timer. The water valve cannot remain open longer than the maximum period. The water

valve can close in less than six minutes if the defrost cycle is completed.

b) Defrost Timer

The defrost cycle starts when the ﬂoat switch opens and completes the freeze cycle.

But the defrost timer does not start counting until the thermistor senses 48°F (9°C) at

the evaporator outlet. The period from the end of the freeze cycle up to the point of the

thermistor’s sensing varies depending on the ambient and water temperatures.

Controller Board

Part Number Type

2A1410-01 HOS-001A (Control Products - 10 Pin)

c) High Temperature Safety - 127 ± 7°F (53 ± 4°C)

The temperature of the suction line in the refrigerant circuit is limited by the high

temperature safety.

During the defrost cycle the evaporator temperature rises. The thermistor senses

48°F (9°C) and starts the defrost timer. After the defrost timer counts down to zero,

the normal freeze cycle begins. If the evaporator temperature continues to rise, the

thermistor will sense the rise in temperature and at 127 ± 7°F (53 ± 4°C) the thermistor

operates the high temperature safety.

This high temperature safety shuts down the circuit and the icemaker automatically

stops. To reset the safety, turn the power off and back on again.

This high temperature safety protects the unit from excessive temperature. The control

board will beep every 3 seconds. The white Reset button on the control board must be

pressed with power on to reset the safety.

d) Low Water Safety

If the pump motor is operated without water, the mechanical seal can fail. To prevent

this type of failure, the controller board checks the position of the ﬂoat switch at the end

of the initial one minute water ﬁll cycle and at the end of each defrost cycle.

If the ﬂoat switch is in the up position (electrical circuit closed), the controller board

changes to the ice making cycle. If the ﬂoat switch is in the down position (electrical

circuit open), the controller board changes to a one minute water ﬁll cycle before

starting the ice making cycle. This method allows for a low water safety shut down to

protect the water pump from mechanical seal failure.

For water-cooled models, if the water is shut off, the unit is protected by the high

pressure switch.

e) High Voltage Cut-out

The maximum allowable supply voltage of this icemaker is limited by the high voltage

cut-out.

If miswiring (especially on single phase 3 wire models) causes excessive voltage on

the controller board, the high voltage cut-out shuts down the circuit in 3 seconds and

the icemaker automatically stops. When the proper supply voltage is resumed, the

icemaker automatically starts running again. The control board will signal this problem

using 7 beeps every 3 seconds.

f) LED Lights and Audible Alarm Safeties

The red LED indicates proper control voltage and will remain on unless a control voltage

problem occurs. At startup a 5 second delay occurs while the board conducts an internal timer

check. A short beep occurs when the power switch is turned ON or OFF.

The green LEDs 1-4 represent the corresponding relays and energize and sequence

5 seconds from initial startup as follows:

ED 1 – Comp; LED 2 - HGV/CFM; LED 3 – PM; LED 4 - WV}

The built in safeties shut down the unit and have alarms as follows:

The output test switch "S3" provides a relay sequence test. With power OFF, place S3 ON and

switch power to ICE. The correct lighting sequence should be none, 2, 3, 4, 1, & 4, normal

sequence every 5 seconds. S3 should remain in the "OFF" position for normal operation.

Sequence Step LED

Time LEDs are Lit

Min. Max. Avg.

1 Minute Fill Cycle

4 60 seconds

Harvest Cycle 1, 4, and 2 2 minutes 20 minutes 3 to 5 minutes

Freeze Cycle

1 5 minutes 60 minutes 30 to 35 minutes

Reverse Pump Out

1, 3, and 2 10 seconds 20 seconds factory setting

No. of Beeps

(every 3 sec.)

Type of Alarm

Notes

1 High Evaporator Temp.

(temperature > 127°F)

(53°C)

Check for defrost problem (stuck HGV

or relay), hot water entering unit, stuck

headmaster, or shorted thermistor.

2 Defrost Backup Timer

(defrost > 20 min.)

Orange LED marked H TIMER lights up.

Check for open thermistor, HGV not

opening, TXV leaking by, low charge, or

inefﬁcient compressor.

3 Freeze Backup Timer

(freeze > 60 min. for

KM-1800SWH/3;

freeze > 70 min. for

KM-1800SAH/3 or

KM-1800SRH/3)

Yellow LED marked F TIMER lights up.

Check for F/S stuck closed (up), WV

leaking by, HGV leaking by, TXV not

feeding properly, low charge, or inefﬁcient

compressor.

To manually reset the above safeties, press the white alarm reset button with the

power supply on.

6 Low Voltage

(92Vac or less)

7 High Voltage

(control voltage

> 147Vac ±5%)

Red LED will turn off if voltage protection

operates.

The voltage safety automatically resets

when voltage is corrected.

(Control Products HOS-001A Board)

The application switch located between relay X3 & X4 must be set to match the original

board application. Place this switch in the ALP position if there is no white wire supplied to

the K1 connector. If there is a white wire, place the switch in the C position. If this switch is

placed in the wrong position either the compressor contactor will remain energized with the

control switch OFF or the unit will not start.

The dip switches should be adjusted per the adjustment chart published in the Tech Specs

book. 7 & 8 must remain in the OFF position.

3. Sequence

1st Cycle

4. Defrost timer stops counting.

Defrost cycle is completed and freeze cycle

starts.

1. Unit energized and control switch to "ICE"

position. Water supply cycle starts.

2. After 1 minute.

Defrost cycle starts.

5. After the ﬁrst 5 minutes in freeze cycle.

Ready to complete freeze cycle when ﬂoat

switch circuit opens.

IMPORTANT

1. Board never accepts defrost completion signal

within the ﬁrst 2 minutes in defrost cycle.

2. Defrost cycle time is limited to 20 minutes

even if defrost timer does not stop counting.

3. Thermistor reads 48°F (9°C).

Defrost timer starts counting.

IMPORTANT

Board never accepts freeze completion signal

within the ﬁrst 5 minutes in freeze cycle.

IMPORTANT

Water valve opening is

limited to 6 minutes.

Page is loading ...

Hoshizaki American, Inc. KM-1800SAH User manual

Brand: Hoshizaki American, Inc.

Model: KM-1800SAH

Category: Ice cube makers

Type: User manual

This manual is also suitable for

Download PDF

report

Hoshizaki American, Inc. KM-1800SAH User manual

This manual is also suitable for

Hoshizaki American, Inc. KM-1800SAH User manual

Related papers

Other documents