2. EVAPORATOR IS FROZEN UP

PROBLEM

POSSIBLE CAUSE

 

REMEDY

[1] Freeze cycle

a) Float Switch

1.

Leads short-circuit or

1.

Check and replace.

time is too

 

 

 

defective switch.

 

 

long.

 

2.

Float does not move freely.

2.

Clean or replace.

 

b) Water Solenoid

1.

Diaphragm does not close.

1.

Check for water leaks

 

Valve

 

 

 

 

with icemaker off.

 

 

 

 

 

 

 

 

c) Controller Board

1.

Defective.

1.

See “II.2[e] CHECKING

 

 

 

 

 

 

CONTROLLER BOARD.”

[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) Water Solenoid

1.

Dirty mesh filter or orifice.

1.

Clean.

harvest cycle.

Valve

 

2.

Diaphragm does not close.

2.

Check for water leaks

 

 

 

 

 

 

with icemaker off.

 

d) Ambient and/or

1.

Too cool.

1.

Increase temperature.

 

water temperature

 

 

 

 

 

 

e) Thermistor

1.

Out of position or loose

1.

See “V. 11. REMOVAL

 

 

 

 

attachment..

 

AND REPLACEMENT OF

 

 

 

 

 

 

THERMISTOR.”

 

f) Controller Board

1.

Defrost Timer is set too

1.

Adjust longer, referring

 

 

 

 

short.

 

to “II. 2. [d] CONTROLS

 

 

 

 

 

 

AND ADJUSTMENT, 2)

 

 

 

 

 

 

Defrost Timer.”

 

 

2.

Defective.

2.

See “II. 2.[e] CHECKING

 

 

 

 

 

 

CONTROLLER BOARD.”

[3] Others

a) Spray Tube

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. LOW ICE PRODUCTION

PROBLEM

POSSIBLE CAUSE

REMEDY

 

 

 

 

 

[1]

Freeze cycle

a) See chart 1

- [3], and check dirty Air Filter or Condenser, ambient or water

 

time is long.

temperature, water pressure, Water Regulator or refrigerant charge.

 

 

b) See chart 2

- [1], and check Float Switch, Water Solenoid Valve or Controller

 

 

Board.

 

 

[2]

Harvest cycle

a) See chart 2

- [2], and check Controller Board, Thermistor, Evaporator, ambient

 

time is long

and/or water temperature, water supply line, Water Solenoid Valve.

 

 

 

 

 

 

 

 

 

 

31

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Hoshizaki KML-200MWE, KML-200MAE service manual Evaporator is Frozen UP, LOW ICE Production
Page 30 Page 32

KML-200MWE, KML-200MAE specifications

The Hoshizaki KML-200MWE and KML-200MAE are commercial ice machines renowned for their high performance and reliability in the foodservice industry. Both models are designed to meet the needs of businesses that require a consistent supply of ice for various applications, including restaurants, bars, and hotels.

One of the standout features of the KML-200MWE and KML-200MAE is their ability to produce high volumes of crisp, clear ice. These machines utilize a combination of advanced refrigeration technology and a unique ice-making process that ensures a rapid ice production rate while maintaining energy efficiency. The modular design allows for easy integration into existing setups, making them an ideal choice for operators looking to expand their ice supply without a complete equipment overhaul.

The KML-200MWE features a built-in water-cooled condenser, allowing for operation in environments where air-cooled systems may not be viable. This feature is particularly useful in warm climates or kitchens with limited ventilation, as it ensures that the machine operates efficiently, regardless of external temperatures. In contrast, the KML-200MAE incorporates an air-cooled condenser, making it a more flexible option for operators who prioritize energy savings and ease of maintenance.

Both models utilize a unique fluorinated refrigerant, which not only enhances their cooling efficiency but also aligns with modern environmental standards. The internal components are constructed from high-quality stainless steel, ensuring durability and resistance to corrosion. Moreover, their easy-to-access design simplifies maintenance routines, enabling operators to keep the machines running smoothly with minimal downtime.

Another key feature of the KML-200MWE and KML-200MAE is their ice storage capacity. With an ample bin size, these machines can store a significant amount of ice, reducing the need for frequent refills and making them ideal for busy establishments. Additionally, they are equipped with automatic ice level controls, which help maintain optimal ice quantities while preventing overflow.

Hoshizaki ice machines are also recognized for their innovative air filtration systems, which improve the quality of the ice produced. This ensures that the ice is not only abundant but also free from any contaminants, meeting the high standards of hygiene expected in the food industry.

In summary, the Hoshizaki KML-200MWE and KML-200MAE are exemplary models that blend technology, efficiency, and durability. Their advanced features make them suitable for various commercial applications, providing operators with reliable performance and peace of mind. Whether choosing the water-cooled or air-cooled variant, businesses can expect a high-quality product that enhances their ice production capabilities.
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