Hoshizaki Troubleshooting KM-1300SAH Evaporator Issues
Page 47

2. Evaporator is Frozen Up

Problem

Possible Cause

 

 

Remedy

 

 

 

 

 

 

 

[1] Freeze cycle time is

a)

Float Switch

1.

Leads short-circuit or

1.

Check and replace.

too long.

 

 

 

defective switch.

 

 

 

 

 

 

 

 

 

 

 

 

2.

Float does not move

2.

Clean or replace.

 

 

 

 

freely.

 

 

 

 

 

 

 

 

 

 

b)

Water Solenoid Valve

1.

Diaphragm does not close.

1.

Check for water leaks with

 

 

 

 

 

 

icemaker off.

 

 

 

 

 

 

 

 

c)

Controller Board

1.

Defective.

1.

See "II.2[e] Checking the

 

 

 

 

 

 

Controller Board."

 

 

 

 

 

 

 

[2] All ice formed on

a)

Evaporator

1.

Scaled up.

1.

Clean.

evaporator does not

 

 

 

 

 

 

b)

Water Supply Line

1.

Water pressure too low.

1.

Check and get

fall into bin in harvest

 

 

 

 

 

recommended pressure.

cycle.

 

 

 

 

 

 

 

 

 

 

 

c)

Water Filter System

1.

Dirty/Restricted

1.

Replace filter.

 

 

 

 

 

 

 

 

 

d)

Water Solenoid Valve

1.

Dirty mesh filter or orifice.

1.

Clean.

 

 

 

 

 

 

 

 

 

 

2.

Diaphragm does not close.

2.

Check for water leaks with

 

 

 

 

 

 

icemaker off.

 

 

 

 

 

 

 

 

e)

Ambient and/or water

1.

Too cool.

1.

Increase temperature.

 

 

temperature.

 

 

 

 

 

 

 

 

 

 

 

 

f)

Line Valve

1.

Continues to open in

1.

Check operation in harvest

 

 

 

 

harvest cycle.

 

cycle and replace.

 

 

 

 

 

 

 

 

g)

Thermistor

1.

Out of position or loose

1.

See "V.11. Removal and

 

 

 

 

attachment.

 

Replacement of

 

 

 

 

 

 

Thermistor."

 

 

 

 

 

 

 

 

h)

Controller Board

1.

Defrost timer is set too

1.

Adjust longer, referring to

 

 

 

 

short.

 

"II.2.[d] Controls and

 

 

 

 

 

 

Adjustments, 2) Defrost

 

 

 

 

 

 

Timer."

 

 

 

 

 

 

 

 

 

 

2.

Defective.

2.

See "II.2[e] Checking the

 

 

 

 

 

 

Controller Board."

 

 

 

 

 

 

 

[3] Other

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 1/2"

1.

Increase water line size.

 

 

 

 

OD line dedicated per

 

 

 

 

 

 

machine.

 

 

 

 

 

 

 

 

 

 

g)

Water Filter

1.

Flow rate too small.

1.

Replace with filter that has

 

 

 

 

 

 

larger flow rate.

 

 

 

 

 

 

 

47

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Page 46 Page 48
Contents Hoshizaki Stackable Crescent Cuber Hoshizaki AMERICA, INC Contents Page KM-1300SAH Specifications IcemakerWater Cooled Condenser KM-1300SWHKM-1300SRH KM-1300SAH3 KM-1300SWH3 KM-1300SRH3 URC-12F Condensing UnitSpecifications Model URC-12F KM-1300SAH, KM-1300SAH3 II. General Information ConstructionKM-1300SWH, KM-1300SWH3 KM-1300SRH, KM-1300SRH3 Controller Board Features of Control Products E Controller BoardController Board Solid-State ControlPage Cycle Beep every 3 sec. = High Evaporator Temperature 127 FMinute Fill Cycle Harvest CycleControl Products HOS-001A Board Sequence 1st Cycle Important Water Valve opening is limited to 6 minutes 2nd Cycle and after with pump drain2nd Cycle and after with no pump drain Dip switch is factory-adjusted to the following positions Controls and AdjustmentsSetting Time Setting Frequency Checking the Controller Board Page KM-1300SAH, KM-1300SAH3 KM-1300SWH, KM-1300SWH3 KM-1300SRH, KM-1300SRH3 KM-1300SAH, KM-1300SWH Wiring DiagramsPsig KM-1300SAH3, KM-1300SWH3 Cut-out 412 0 +21.3 Psig Cut-in 327 ± 21.3 Psig Timing Chart Page 327 Performance Data1284 1296 1320 1254 1308 Problem Possible Cause Remedy IV. Service Diagnosis No Ice ProductionProblem Possible Cause Remedy Water Regulator Water Problem Possible Cause Remedy Evaporator is Frozen Up Other Low Ice ProductionAbnormal Ice Evacuation and Recharge R-404A Removal and Replacement of ComponentsService for Refrigerant Lines Refrigerant RecoveryBrazing Removal and Replacement of Compressor Removal and Replacement of Drier Removal and Replacement of Expansion Valve Removal and Replacement of Hot Gas Valve and Line Valve 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 Pump Motor Removal and Replacement of Water ValveRemoval and Replacement of Spray Tubes Preparing the Icemaker for Long Storage VI. Maintenance and Cleaning InstructionsPage Cleaning and Sanitizing Procedures Cleaning Procedure Page Sanitizing Procedure Following Cleaning Procedure Maintenance

KM-1300SRH3, KM-1300SWH, KM-1300SRH, KM-1300SAH, KM-1300SWH3 specifications

The Hoshizaki KM-1300 series ice makers are designed to meet the demands of high-volume establishments requiring consistent, high-quality ice production. Among the models in this series are the KM-1300SAH3, KM-1300SWH, KM-1300SRH3, KM-1300SWH3, and KM-1300SAH, each boasting a variety of features and technologies to enhance efficiency and reliability.

One of the standout features of the KM-1300 series is its impressive ice production capacity. Each model is capable of producing up to 1,300 pounds of ice in a 24-hour period, making them ideal for busy restaurants, hotels, or bars that serve a high volume of customers. The machines are designed to create crescent ice, known for its pellet-like texture that is perfect for drink service and food display.

Energy efficiency is another key characteristic of the Hoshizaki KM-1300 models. They are equipped with a highly efficient refrigeration system that minimizes energy consumption while maximizing output. Many of the models in this series are certified by Energy Star, helping operators reduce their environmental footprint and lower operational costs.

Durability and ease of maintenance are also prominent features of the KM-1300 series. Constructed with stainless steel exteriors, these ice makers are built to withstand the rigors of a busy kitchen environment. Additionally, Hoshizaki has incorporated a unique air-cooled condenser design, which reduces the need for frequent servicing and minimizes downtime.

The KM-1300SAH3 and KM-1300SAH models come with advanced touch controls and a user-friendly interface, allowing operators to monitor and adjust settings with ease. The built-in self-diagnostic system alerts users to potential issues before they escalate, improving reliability and ensuring consistent ice production.

For those seeking flexibility, the KM-1300 series also offers modular designs, enabling operators to stack units or configure them in various layouts to optimize space. This adaptability makes these ice makers a smart choice for establishments with limited room or specific design requirements.

In summary, the Hoshizaki KM-1300 series ice makers combine efficiency, durability, and high production rates with advanced technology and user-friendly features. Ideal for high-demand environments, these machines deliver reliable performance and consistent ice quality, making them a valuable asset for any food service operation.
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