Hoshizaki KMD-900MAH, KMD-700MAH From Controller Board Defective See II.2e Checking Previous

Page 54

Problem

Possible Cause

 

 

Remedy

 

 

 

 

 

 

 

[3] Continued from

h)

Controller Board

1.

Defective.

1.

See "II.2[e] Checking the

previous page.

 

 

 

 

 

Controller Board."

 

 

 

 

 

 

 

 

i)

Water Regulator [Water-

1.

Set too high.

1.

Adjust lower.

 

 

cooled model only]

 

 

 

 

 

 

 

 

 

 

 

 

j)

Discharge Temp.

1.

Refrigerant undercharged.

1.

Recharge.

 

 

Switch

 

 

 

 

 

 

2.

Cooling fan not operating.

2.

See chart 1.[6].

 

 

 

 

 

 

 

 

 

 

[4] Water continues to

a)

Water Solenoid Valve

1.

Diaphragm does not close.

1.

Check for water leaks with

be supplied in freeze

 

 

 

 

 

icemaker off.

cycle.

 

 

 

 

 

 

b)

Controller Board

1.

Defective.

1.

See "II.2[e] Checking the

 

 

 

 

 

 

 

Controller Board."

 

 

 

 

 

 

 

[5] No water comes from

a)

Water Supply Line

1.

Water pressure too low

1.

Check and get

spray tubes. Water

 

 

 

and water level in water

 

recommended pressure.

pump will not start, or

 

 

 

tank too low.

 

 

freeze cycle time is

 

 

 

 

 

 

b)

Water Solenoid Valve

1.

Dirty mesh filter or orifice

1.

Clean.

too short.

 

 

 

and water level in water

 

 

 

 

 

 

tank too low.

 

 

 

 

 

 

 

 

 

 

c)

Water System

1.

Water leaks.

1.

Check connections for

 

 

 

 

 

 

water leaks, and replace.

 

 

 

 

 

 

 

 

 

 

2.

Clogged.

2.

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 out.

6.

Check and replace.

 

 

 

 

 

 

 

 

e)

Controller Board

1.

Defective.

1.

See "II.2[e] Checking the

 

 

 

 

 

 

Controller Board."

[6] Fan Motor will not

a)

Fan Motor

1.

Motor winding opened.

1.

Replace.

start, or is not

 

 

2.

Bearing worn out.

2.

Replace.

operating.

 

 

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)

Controller Board

1.

Defective.

1.

See "II.2[e] Checking the

 

 

 

 

 

 

Controller Board."

[7] All components run,

a)

Refrigerant

1.

Undercharged.

1.

Check for leaks and

but no ice is

 

 

 

 

 

recharge.

produced.

 

 

2.

Air or moisture trapped.

2.

Replace drier and

 

 

 

 

 

 

recharge.

 

b)

Compressor

1.

Defective valve.

1.

Replace.

 

c)

Hot Gas Solenoid

1.

Continues to open in

1.

Check and replace.

 

 

Valve

 

freeze cycle.

 

 

 

d)

Line Valve

1.

Continues to close in

1.

Check and replace.

 

 

 

 

freeze cycle.

 

 

54

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Contents Item # Issued June 2, 2003 Revised July 28 Hoshizaki AMERICA, INC Contents Page Specifications 1. KMD-700MAH Approximate Storage Capacity Electric & Water ConsumptionKMD-700MWH Water Cooled CondenserKMD-700MRH KMD-900MAH KMD-900MWH KMD-900MRH Condensing Unit URC-12FModel URC-12F II. General Information Construction KMD-700MAHKMD-700MWH KMD-700MRH KMD-900MAH KMD-900MWH KMD-900MRH Solid-State Control Features of Control Products E Controller BoardController Board Controller BoardPage LED Control Products HOS-001A Board Sequence 1st Cycle Important Water valve opening is limited to 6 minutes2nd Cycle and after with pump drain 2nd Cycle and after with no pump drain Controls and Adjustments Setting Time Setting Frequency 60 min Checking the Controller Board Proximity Switch Mechanical Bin ControlExplanation of Operation Troubleshooting KMD-700MAH and KMD-900MAH KMD-700MWH and KMD-900MWH KMD-700MRH and KMD-900MRH Wiring Diagrams A1 KMD-700MAH and KMD-700MWH auxiliary code R-0 and earlierA2 KMD-700MAH and KMD-700MWH auxiliary code R-1 and later B1 KMD-700MRH auxiliary code R-0 and earlier B2 KMD-700MRH auxiliary code R-1 and later C1 KMD-900MAH and KMD-900MWH auxiliary code R-0 and earlier C2 KMD-900MAH and KMD-900MWH auxiliary code R-1 and later D1 KMD-900MRH auxiliary code R-0 and earlier D2 KMD-900MRH auxiliary code R-1 and later Timing Chart Page Performance Data 202701 730 875 886 906 IV. Service Diagnosis No Ice Production Problem Possible Cause RemedyProblem Possible Cause Remedy From Controller Board Defective See II.2e Checking Previous Evaporator is Frozen Up Low Ice Production Abnormal IceOther Refrigerant Recovery Removal and Replacement of ComponentsService for Refrigerant Lines Evacuation and Recharge R-404ABrazing Removal and Replacement of Compressor Page Removal and Replacement of Drier Removal and Replacement of Expansion ValveRemoval and Replacement of Hot Gas Valve and Line Valve Page Removal and Replacement of Evaporator Page Adjustment of Water Regulating Valve Water-Cooled Model Only Page Removal and Replacement of Thermistor Removal and Replacement of Fan Motor Removal and Replacement of Water Valve Removal and Replacement of Pump MotorRemoval and Replacement of Spray Tubes Removal and Replacement of Bin Control Page Page Top View Cleaning Instructions Cleaning ProcedurePage Page Sanitizing Procedure Following Cleaning Procedure Maintenance
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Manual 35 pages 38.41 Kb Manual 42 pages 58.83 Kb

KMD-900MRH, KMD-900MWH, KMD-700MRH, KMD-700MWH, KMD-700MAH specifications

The Hoshizaki KMD series offers a range of high-performance ice machines designed to meet the needs of various commercial applications, including restaurants, bars, and healthcare facilities. Models such as the KMD-700MAH, KMD-700MRH, KMD-900MRH, KMD-900MWH, and KMD-900MAH are equipped with innovative technologies and features that ensure efficient ice production and reliable operation.

The KMD-700MAH model is known for its adaptability and efficiency, producing flake ice that is ideal for use in various applications like food preservation, cooling drinks, and more. With a production capacity of up to 700 pounds of ice per day, this model is perfect for medium-sized establishments. Its advanced design incorporates a unique evaporator that enhances ice production while minimizing energy consumption.

Similarly, the KMD-700MRH offers versatility with a similar production capacity, focusing on reliability and performance. This model uses a high-efficiency compressor and a self-contained refrigeration system, ensuring consistent ice production across different ambient conditions. The KMD-700MRH is especially suitable for locations that require frequent and reliable ice replenishment.

The KMD-900 series takes performance a step further, with the KMD-900MRH and KMD-900MAH providing a higher production capacity of up to 900 pounds per day. These machines leverage Hoshizaki’s patented air-cooled technology, which enhances efficiency and reduces operating costs. The robust construction and advanced features make them ideal for high-demand environments.

The KMD-900MWH variant offers an innovative water-cooled option, suitable for businesses in areas with high ambient temperatures or those where air-cooled machines might struggle. By utilizing a water cooling system, it ensures stable performance even in challenging conditions, making it a dependable choice for busy kitchens.

All models in the KMD series feature an easy-to-use digital control panel, which allows for effortless monitoring and adjustments to operations. This technology not only simplifies management but also enables users to receive real-time alerts regarding machine status and maintenance needs, ultimately minimizing downtime.

In summary, the Hoshizaki KMD-700MAH, KMD-700MRH, KMD-900MRH, KMD-900MWH, and KMD-900MAH models are equipped with advanced ice-making technologies designed to deliver high production rates, efficient energy consumption, and reliable performance. Whether it's for a restaurant, bar, or healthcare application, these machines bring together reliability and versatility, making them indispensable tools for any commercial kitchen environment.
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