Hoshizaki KM-501MWH, KM-501MRH, KM-501MAH service manual Problem Possible Cause Remedy

Page 37

Problem

Possible Cause

 

Remedy

 

 

 

 

 

 

2. Clogged.

2. Clean.

 

 

 

 

 

 

3. Pump out check valve

3. Check assembly and

 

 

leaking by.

clean.

 

 

 

 

 

d)Pump Motor

1. Motor winding opened.

1. Replace.

 

 

 

 

 

 

2. Bearing worn out.

2. Replace.

 

 

 

 

 

 

3. Wiring to pump motor.

3. Check for loose

 

 

 

connection or open, and

 

 

 

replace.

 

 

 

 

 

 

4. Defective capacitor.

4. Replace.

 

 

 

 

 

 

5. Defective or bound

5. Replace and clean.

 

 

impeller.

 

 

 

 

 

 

 

6. Mechanical seal worn

6. Check and replace.

 

 

out.

 

 

 

 

 

 

e)Control Board

1. Defective.

1. See "II.C.4. Control Board

 

 

 

Check Procedure."

 

 

 

 

[6] Fan motor will

a)Fan Motor

1. Motor winding opened.

1. Replace.

not start, or is not

 

 

 

operating.

 

2. Bearing worn out.

2. Replace.

 

 

 

 

 

 

3. Wiring to fan motor.

3. Check for loose

 

 

 

connection or open, and

 

 

 

replace.

 

 

 

 

 

 

4. Defective capacitor.

4. Replace.

 

 

 

 

 

 

5. Fan blade bound.

5. Check and replace.

 

 

 

 

 

b)Control Board

1. Defective.

1. See "II.C.4. Control Board

 

 

 

Check Procedure."

 

 

 

 

[7] All components

a)Refrigerant

1. Undercharged.

1. Check for leaks and

run, but no ice is

 

 

recharge.

produced.

 

 

 

 

2. Air or moisture

2. Replace drier and

 

 

 

 

trapped.

recharge.

 

 

 

 

 

b)Compressor

1. Defective valve.

1. Replace.

 

 

 

 

 

c) Hot Gas Valve

1. Continues to open in

1. Check and replace.

 

 

freeze cycle.

 

 

 

 

 

 

d)Line Valve

1. Continues to close in

1. Check and replace.

 

 

freeze cycle.

 

 

 

 

 

 

e)Inlet Water Valve

1. Water valve is wide

1. Check for water leaks with

 

 

open during freeze.

icemaker off.

 

 

 

 

 

f) Headmaster (C.P.R.)

1. Not operating properly

1. Replace headmaster.

 

(Remote Unit)

and liquid line

 

 

 

temperature too warm.

 

 

 

 

 

 

g)Water Supply Line

1. Condenser water

1. Check and get

 

(water-cooled model

pressure too low or off

recommended pressure.

 

only)

and pressure control

 

 

 

opens and closes

 

 

 

frequently.

 

 

 

 

 

 

h)Water Regulator

1. Set too high.

1. Adjust or replace. See

 

(water-cooled model

 

"V.I. Adjustment of Water

 

only)

 

Regulating Valve."

 

 

 

 

37

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Contents KM-501MAH KM-501MWH KM-501MRH Hoshizaki AMERICA, INC Contents Page KM-501MAH air-cooled Specifications IcemakerWater Cooled Condenser KM-501MWH water-cooledKM-501MRH remote air-cooled URC-6F Condensing UnitSpecifications II. General Information Construction KM-501MWH water-cooled KM-501MRH remote air-cooled Sequence of Operation Cycle Steps Harvest Cycle Freeze Cycle One Minute Control Board Control Board Layout Control Products E Control BoardControl Board Maximum Water Supply Period 6 minutes FeaturesLED Lights and Audible Alarm Safeties Default Dip Switch Settings Controls and AdjustmentsHarvest Timer dip switch 1 Pump-Out Frequency Control dip switch 5 Control Board Replacement Control Board Check ProcedureKM-501MAH air-cooled KM-501MWH water-cooled KM-501MRH remote air-cooled KM-501MAH air-cooled and KM-501MWH water-cooled Wiring DiagramsPsig Timing Chart Page 245 Performance Data488 482 IV. Service Diagnosis Minute KM Diagnostic Procedure No Ice Production Diagnostic ChartsProblem Possible Cause Remedy Problem Possible Cause Remedy Problem Possible Cause Remedy Evaporator is Frozen Up Abnormal Ice Low Ice ProductionOther Problem Possible Cause Remedy Service for Refrigerant Lines Removal and Replacement of ComponentsRefrigerant Recovery Evacuation and Recharge R-404ABrazing Removal and Replacement of CompressorRemoval and Replacement of Drier Removal and Replacement of Hot Gas Valve and Line Valve Removal and Replacement of Expansion ValveRemoval and Replacement of Evaporator Adjustment of Water Regulating Valve Water-Cooled Model Only Adjustment Screw CW Higher CCW Lower Top View Removal and Replacement of Thermistor Removal and Replacement of Inlet Water Valve Removal and Replacement of Fan MotorRemoval and Replacement of Pump Motor Removal and Replacement of Spray Tubes Cleaning and Sanitizing Procedures VI. Cleaning and Maintenance InstructionsCleaning Procedure Sanitizing Procedure Following Cleaning Procedure MaintenanceStainless Steel Exterior Storage Bin and Scoop Preparing the Icemaker for Long StorageAir Filters air-cooled models only Condenser air-cooled and remote air-cooled models only
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KM-501MAH, KM-501MWH, KM-501MRH specifications

The Hoshizaki KM-501MWH, KM-501MAH, and KM-501MRH are standout models in the commercial ice machine market, known for their robust performance and innovative technologies. These machines are specially designed to meet the diverse needs of restaurants, bars, and other food service establishments that require a reliable source of high-quality ice.

One of the defining features of the KM-501 series is their high production capacity. Each model can produce up to 500 pounds of ice per day, ensuring that even the busiest establishments can keep up with demand. The ice produced is crystal-clear, with a unique crescent shape that not only looks appealing but also melts slowly, making it ideal for drinks and food presentations.

The KM-501MWH model is equipped with advanced technology that ensures energy efficiency and reduced water usage. It features a powerful compressor and a highly efficient evaporator, which work together to minimize energy consumption while maximizing output. This makes it an environmentally friendly choice, reducing operational costs for businesses.

The KM-501MAH model stands out with its air-cooled condenser system, which allows for optimal performance without the need for extensive cooling water lines. This makes the installation process easier and reduces complexity, enabling businesses to set up their ice machine with minimal hassle. Furthermore, it features a self-cleaning mode that simplifies maintenance, contributing to consistent ice quality over time.

On the other hand, the KM-501MRH is designed for rugged environments. It is constructed with high-quality materials that enhance durability and longevity, making it suitable for outdoor applications or establishments located in warmer climates. The stainless-steel design not only contributes to the machine's robustness but also ensures easy cleaning and resistance to rust and corrosion.

Another key characteristic of the Hoshizaki KM-501 models is their user-friendly control panel. These machines come with intuitive controls that allow operators to easily adjust settings and monitor performance. This feature is particularly useful for staff in busy kitchens, enabling them to focus on service without constant checks on ice production.

Overall, the Hoshizaki KM-501MWH, KM-501MAH, and KM-501MRH offer excellent performance, energy efficiency, and user-friendliness. Their combination of innovative technologies, durable design, and high output capacity make them exceptional choices for any establishment in need of reliable ice production. Whether for a bustling restaurant or a bar serving up cocktails, these machines deliver ice that consistently meets high standards.
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