Hoshizaki KM-201BWH, KM-260BAH, KM-201BAH, KM-260BWH service manual Evaporator is Frozen UP

Page 47

3. EVAPORATOR IS FROZEN UP

PROBLEM

POSSIBLE CAUSE

 

REMEDY

 

 

 

 

 

 

[1] Freeze cycle

a) Float Switch

1.

Leads shorted or

1.

Check and replace.

time is too

 

 

defective switch.

 

 

long.

 

2.

Float does not move

2.

Clean or replace.

 

 

 

freely.

 

 

 

b) Inlet Water Valve

1.

Diaphragm does not

1.

Check for water leaks

 

 

 

close.

 

with icemaker off.

 

 

 

 

 

Replace if necessary.

 

c) Control Board

1.

Defective.

1.

See “II. 3. [d] CONTROL

 

 

 

 

 

BOARD CHECK

 

 

 

 

 

PROCEDURE”.

[2] All ice formed

a) Evaporator

1.

Scaled up.

1.

Clean.

on Evaporator

b) Water Supply Line

1.

Water pressure too low.

1.

Check and get

does not fall

 

 

 

 

recommended pressure.

into bin in

c) Inlet Water Valve

1.

Dirty mesh filter or

1.

Clean.

harvest cycle.

 

 

orifice.

 

 

 

 

2.

Diaphragm does not

2.

Check for water leaks

 

 

 

close.

 

with icemaker off.

 

 

 

 

 

Replace if necessary.

 

d) Ambient and/or

1.

Too cool.

1.

Increase temperature.

 

water temperature

 

 

 

 

 

e) Thermistor

1.

Out of position or loose

1.

See “V. 17.

 

 

 

attachment.

 

THERMISTOR”.

 

f) Control Board

1.

Harvest timer is set too

1.

Adjust longer, referring to

 

 

 

short.

 

“II. 4. THERMISTOR”.

 

 

2.

Defective.

2.

See “II. 3. [d] CONTROL

 

 

 

 

 

BOARD CHECK

 

 

 

 

 

PROCEDURE”.

[3] Others

a) Spray Tubes

1.

Clogged.

1.

Clean.

 

 

2.

Out of position.

2.

Place in position.

 

b) Water System

1.

Dirty.

1.

Clean.

 

c) Refrigerant

1.

Undercharged.

1.

Check for leaks and

 

 

 

 

 

recharge.

 

d) Expansion Valve

1.

Bulb out of position or

1.

Place in position.

 

 

 

loose attachment.

 

 

 

 

2.

Defective.

2.

Replace.

 

e) Hot Gas Solenoid

1.

Coil winding opened.

1.

Replace.

 

Valve

2.

Plunger does not move.

2.

Replace.

 

 

3.

Wiring to hot gas valve.

3.

Check for loose

 

 

 

 

 

connection or open, and

 

 

 

 

 

replace.

 

f) Water Supply Line

1.

Too small; requires 9.5

1.

Increase water supply line

 

 

 

mm OD line dedicated

 

size.

 

 

 

per machine.

 

 

 

g) Water Filter

1.

Flow rate too small.

1.

Replace with filter that

 

 

 

 

 

has larger flow rate.

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Page 46 Page 48
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 1Freeze Timer S1 dip switch 9 Pump-Out Frequency Control S1 dip switch 5Harvest Pump Timer S1 dip switch 7 Pump-Out Pump Motor Delay S2 dip switch Refill Counter S2 dip switch 3 Program Ver Control Board Check Procedure Overfreeze Detection Control S2 dip switch 5 Program VerAnti-Slush Control S2 dip switch 6 Program Ver Thermistor Control Board ReplacementExplanation of Operation BIN Control Check ProcedureBIN Control 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 Service Information Removal and ReplacementService for Refrigerant Lines 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 Cleaning Procedure VI. Cleaning and Maintenance InstructionsCleaning Sanitizing Procedure Following Cleaning Procedure Storage BIN and Scoop MaintenanceExterior Panels 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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