Hoshizaki DKM-500BAH service manual Diagnostic Charts, Ice Making, No Ice Production

Page 25

conditions. Cycle times and pressures should follow performance data provided in this manual.

6)Pump-Out Cycle (10/20 second pump out) – the compressor remains energized, the hot gas valve energizes, the fan motor de-energizes, the pump motor stops for

2 seconds. The service relay energizes, restarting the pump motor and taking water from the sump and forcing it to go through the drain valve and down the drain for 10/20 seconds. This removes contaminants from the water reservoir. Check for clear tubing at the drain valve housing and check the unit drain for water flow. Diagnosis: If the pump motor does not run, check the circuit, service relay and capacitor. Check for proper voltage. If water does not pump out, remove the drain valve and check/clean the valve assembly.

7)Normal Harvest Cycle – same as the initial harvest cycle – Return to step 4.

Note: Unit continues to cycle until bin control is satisfied or power is switched OFF. (The pump out cycle can be adjusted to occur every cycle, or every 2, 5, or 10 cycles. The factory default is every 10 cycles.) The unit always restarts at the 1 minute fill cycle.

B. Diagnostic Charts

1. Ice Making

a) No Ice Production

Problem

Possible Cause

 

Remedy

 

 

 

 

[1] The icemaker will not

a) Power Supply

1. OFF position.

1. Move to ON position.

start.

 

 

 

 

2. Loose connection.

2. Tighten.

 

 

 

 

 

 

 

 

3. Bad contacts.

3. Check for continuity and

 

 

 

replace.

 

 

 

 

 

 

4. Voltage too high.

4. Check and get

 

 

 

recommended voltage.

 

b) Fuse (Inside fused

1. Blown.

1. Check for short circuit and

 

disconnect, if any)

 

replace.

 

 

 

 

 

c) Control Switch

1. OFF position.

1. Move to ICE position.

 

 

2. Bad contacts.

2. Check for continuity and

 

 

 

replace.

 

 

 

 

 

d) Bin Control

1. Tripped with bin filled

1. Remove ice.

 

See the information

with ice.

 

 

to the right and also

 

 

 

2. Bad contacts (stuck

2. Check for continuity and

 

see "II.C.4. Bin Control

 

Troubleshooting."

open).

replace.

 

3. Resistor wire harness.

3. Check resistance. Should

 

 

 

 

 

be approximately 7.9 KΩ

 

 

 

when calling for ice

 

 

 

(proximity switch closed).

 

 

 

 

 

e) High Pressure Control

1. Bad contacts.

1. Check for continuity and

 

 

 

replace.

 

 

 

 

 

 

2. Dirty air filter or

2. Clean.

 

 

condenser.

 

 

 

 

 

 

 

3. Ambient temperature

3. Reduce temperature.

 

 

too warm.

 

 

 

 

 

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Contents DKM-500BAH Hoshizaki AMERICA, INC Contents Page DKM-500BAH SpecificationsDKM-500BAH II. General Information ConstructionSequence of Operation Cycle DKM-500BAH Sequence Flow Chart and Component OperationControl Board Control Board Layout Control Products E Control BoardControl Board High Temperature Safety Harvest Backup Timer and Freeze TimerLow Water Safety Maximum Water Supply Period 6 minutesPM, SR, DV LED Lights and Audible Alarm SafetiesDefault Dip Switch Settings Controls and AdjustmentsHarvest Control Thermistor Pump-Out Timer dip switch 3 Harvest Timer dip switch 1Freeze Timer dip switch 9 Pump-Out Frequency Control dip switch 5Bin Control Control Board Check Procedure Bin Control TroubleshootingMachine Will Not Start Machine Will Not Shut OffControl Board Replacement SwitchesControl Switch Service SwitchWash CirculateDKM-500BAH Wiring Diagram Timing Chart Page 110 Performance DataIV. Service Diagnosis Minute Diagnostic Procedure Ice Making Diagnostic ChartsNo Ice Production Problem Possible Cause Remedy Problem Possible Cause Remedy Evaporator is Frozen Up Abnormal Ice Low Ice ProductionDispensing OtherProblem 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 Removal and Replacement of Expansion ValveRemoval and Replacement of Evaporator Removal and Replacement of Condenser Removal and Replacement of Fan Motor Removal and Replacement of ThermistorRemoval and Replacement of Pump Motor Removal and Replacement of Inlet Water ValveRemoval and Replacement of Gear Motor Removal and Replacement of Spray TubesRemoval and Replacement of Solenoid Removal and Replacement of Dispense SwitchCleaning Instructions VI. Cleaning and Maintenance InstructionsCleaning Procedure Icemaker Sanitizing Procedure Icemaker Sanitizing Procedure Bin Cleaning Procedure BinPreparing the Icemaker for Long Storage Maintenance InstructionsExterior Panels Air Filters

DKM-500BAH specifications

The Hoshizaki DKM-500BAH is a high-performing ice maker renowned in the food service industry for its reliability and efficiency. This unit excels in producing crescent-style ice, which is highly sought after for its ability to chill beverages effectively while minimizing dilution. The Hoshizaki reputation for quality is well-reflected in the DKM-500BAH, making it a popular choice in restaurants, bars, and other establishments that demand high ice production capacity.

One of the standout features of the DKM-500BAH is its impressive ice production capability. This model has the capacity to produce up to 500 pounds of ice per day, ensuring that businesses with high-volume demands can meet their needs without interruption. The unit operates on a refrigerant system designed for optimal energy efficiency, which can lower operating costs and contribute to sustainability goals.

The DKM-500BAH utilizes advanced technology, including Hoshizaki's patented ice-making mechanism. This system features a stainless steel evaporator that enhances durability and ice quality. The crescent-shaped ice it produces has a slower melt rate, making it perfect for restaurants and bars that focus on customer experience. Additionally, the unit is equipped with a cycle control that ensures ice is produced consistently.

Another critical aspect of the DKM-500BAH is its user-friendly design. It features a front-facing control panel that allows for easy monitoring and adjustment of settings. A built-in diagnostics system alerts users to potential issues, enabling prompt maintenance and reducing downtime. The removable air filter is another convenience, making it simple to clean and maintain the unit’s efficiency.

Moreover, the construction of the DKM-500BAH is noteworthy. It features a corrosion-resistant stainless steel exterior that ensures longevity and maintains hygiene standards. The unit also has an insulated storage bin that holds up to 250 pounds of ice, making it an efficient solution for busy settings.

In summary, the Hoshizaki DKM-500BAH is a robust ice maker that combines high production capacity, advanced technology, and user-friendly features. Its build quality and efficient performance position it as a leader in the commercial ice-making market, making it an ideal investment for establishments requiring reliable ice supply.
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