Hoshizaki KM-201BWH, KM-260BAH, KM-201BAH, KM-260BWH Thermistor, Control Board Replacement

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1)Check the dip switch settings to assure that S1 dip switch 3, 4, 7, 8, 9 & 10 and S2 dip switch 1 through 6 are in the factory default position. S1 dip switch 1, 2, 5, & 6 are cleaning adjustments and the settings are flexible.

2)Move the control switch to the “ICE” position and check for proper control voltage. If the “POWER OK” LED is on, the control voltage is good. If the “POWER OK” LED is off, check the control transformer circuit. If no voltage is present, check the power supply circuit.

3)To perform a relay sequence test, turn on the power switch while pressing the “OUTPUT TEST” button. The correct lighting sequence should be 5, 6, 7, 8, 9, 4. Some components (e.g., the compressor) will cycle during test. Each LED comes on for 5 seconds. LED 5 is on while LED 6 is on. Following the output test sequence, the icemaker will resume normal operation beginning with the 1 minute fill cycle.

[e] CONTROL BOARD REPLACEMENT

The dip switches should be adjusted to the factory default settings as outlined in this manual.

4. THERMISTOR

A thermistor (semiconductor) is used as a harvest control sensor and anti-slush sensor. The resistance varies depending on the suction line temperatures. The thermistor detects the temperature of the evaporator outlet to start the harvest timer or momentarily stop the pump motor during the freeze cycle. No adjustment is required. If necessary, check for resistance between thermistor leads, and visually check the thermistor mounting, located on the suction line next to the evaporator outlet.

Temperature (°F)

Temperature (°C)

Resistance (kΩ)

0

-18

14.401

10

-12

10.613

32

0

6.000

50

10

3.871

70

21

2.474

90

32

1.633

Check a thermistor for resistance by using the following procedure:

1)Disconnect the connector K1 on the board.

2)Remove the thermistor. See “V. 17. THERMISTOR”.

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

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Contents Model KM-201BAH KM-260BAH KM-201BWH KM-260BWH Hoshizaki AMERICA, INC Contents Adjustment of Water Regulating Valve Page Specifications 1. Specifications a KM-201BAH KM-260BAH KM-201BWH KM-260BWH KM-201BAH, KM-260BAH II. General Information 1. ConstructionFront View KM-260BWH Icemaking Compartment Freeze Cycle Sequence of OperationONE Minute Fill Cycle Initial Harvest CycleShutdown Normal Harvest CycleDrain Control Board $POUSPM#PBSE Control Board LayoutLow Water Safety Features Maximum Water Supply Period 6 minutesHarvest Backup Timer and Freeze Timer High Temperature SafetyWV, HGV LED Lights and Audible Alarm SafetiesDefault Dip Switch Settings Controls and AdjustmentsPump-Out Timer S1 dip switch 3 Harvest Timer S1 dip switch 1Pump-Out Frequency Control S1 dip switch 5 Harvest Pump Timer S1 dip switch 7Freeze Timer S1 dip switch 9 Pump-Out Pump Motor Delay S2 dip switch Refill Counter S2 dip switch 3 Program Ver Overfreeze Detection Control S2 dip switch 5 Program Ver Anti-Slush Control S2 dip switch 6 Program VerControl Board Check Procedure Thermistor Control Board ReplacementBIN Control Check Procedure BIN ControlExplanation of Operation Drain SwitchesControl Switch Service SwitchWash CirculateHot Gas KM-201BWH, KM-260BWH Wiring Diagram KM-201BAH Timing ChartHV/FM OFF Relay Control Power Switch Freeze Cycle Harvest Cycle Production PER 24 HR Performance Data263 215 268 IV. Service Diagnosis Diagnostic Procedure Page No ICE Production Board Check Problem Possible Cause Remedy Evaporator is Frozen UP LOW ICE Production Other Removal and Replacement Service for Refrigerant LinesService Information Evacuation and Recharge R-404A Refrigerant RecoveryBrazing Compressor Drier HOT GAS Valve Hot Gas Valve Expansion Valve AIR-COOLED Condenser WATER-COOLED Condenser Caution FAN Motor AIR-COOLED Model Water Regulating Valve WATER-COOLED Model Caution Page Adjustment of Water Regulating Valve WATER-COOLED Model Pump Motor Water Valve Drain VALVE, Cleaning Valve Float Switch BIN Control Switch Thermistor Control BOX Fuse Holder Power SwitchPower Relay FuseControl Board Transformer Water TankSeparator Cube GuidePage Spray TUBE, Water Supply PIPE, Spray Guide Door VI. Cleaning and Maintenance Instructions CleaningCleaning Procedure Sanitizing Procedure Following Cleaning Procedure Maintenance Exterior PanelsStorage BIN and Scoop Remove the water from the potable water supply line Preparing the Icemaker for Long StorageAIR Filter AIR-COOLED Model Condenser AIR-COOLED ModelInlet Hose Washer Stop Valve

KM-201BWH, KM-260BWH, KM-201BAH, KM-260BAH specifications

The Hoshizaki KM-260BAH, KM-201BAH, KM-201BWH, and KM-260BWH are state-of-the-art ice machines designed for commercial use, demonstrating Hoshizaki's commitment to quality and innovation in the foodservice industry.

The KM-260BAH and KM-260BWH models are known for their impressive production capabilities, yielding up to 260 pounds of crescent ice daily. This ice type not only looks appealing but also has excellent cooling properties, making it a favorite in bars and restaurants. The KM-201BAH and KM-201BWH models produce up to 201 pounds of ice per day, making them ideal for establishments with moderate ice needs.

One of the standout features of these machines is the advanced air-cooled technology, which ensures optimal efficiency and reliability. The air-cooled condenser minimizes water usage, reducing operational costs while delivering consistent performance. Both BM-260 and KM-201 series models are equipped with a highly efficient refrigeration system, promoting rapid ice production even in warm environments.

The KM-260BAH and KM-260BWH models utilize a durable stainless steel exterior, providing not only a sleek appearance but also resistance to corrosion, ensuring longevity in demanding kitchen environments. The interior of these machines is designed with ease of cleaning in mind; a removable front panel allows quick access for maintenance, making service less time-consuming.

In terms of energy efficiency, these Hoshizaki ice machines meet Energy Star standards, offering reduced energy consumption and lower utility bills. The smart design also minimizes noise, creating a more pleasant atmosphere in bustling kitchens.

Another important characteristic of the KM-201BAH and KM-201BWH models is their flexible installation options, allowing users to adapt the machine to their space effortlessly. Additionally, the optional built-in storage bin can be paired seamlessly for enhanced convenience.

These ice machines also come with Hoshizaki's distinctive EverCheck alert system. This technology monitors the machine's operation, notifying operators of any necessary maintenance or issues before they become significant problems.

Overall, the Hoshizaki KM-260BAH, KM-201BAH, KM-201BWH, and KM-260BWH models showcase cutting-edge technology, energy efficiency, and user-friendly features, making them an excellent choice for any business in need of a reliable ice solution. Their focus on durability and performance positions them as a benchmark in the commercial ice machine sector, ensuring a consistent supply of high-quality ice.
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