Check a thermistor for resistance by using the following procedure:

1)Disconnect the connector K3 on the board.

2)Remove the thermistor. See "V.H. Removal and Replacement of Thermistor."

3)Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 minutes.

4)Verify the temperature of the glass, then check for resistance between thermistor leads. See the table above for temperature and resistance values. Normal reading is within 3.5 to 7 kΩ. Replace the thermistor if it exceeds the normal reading.

c)Harvest Timer (dip switch 1 & 2)

The harvest timer starts counting when the thermistor reads 48°F (9°C) at the evaporator outlet.

No adjustment is required under normal use, as the harvest timer is adjusted to the suitable position. However, a setting longer than the factory setting may be advised in cases where the flush provided at harvest needs to be prolonged for extra cleaning. Before changing this setting, call the HOSHIZAKI Technical Support Department at

1-800-233-1940 for recommendations. Keep in mind that setting the harvest timer to a longer setting will decrease 24 hour production.

Dip Switch Setting

Time

No. 1

No. 2

(seconds)

 

OFF

OFF

60

ON

OFF

90

OFF

ON

120

ON

ON

180

d)Pump-Out Timer (dip switch 3 & 4)

When a freeze cycle is completed, the pump motor stops, and the icemaker resumes operation in 2 seconds. Then, during cycles when a pump out is called for, the pump motor drains the water tank for the time determined by the pump-out timer. The pump- out timer also acts in place of the harvest timer during cycles with a pump out.

The pump-out timer is factory-adjusted, and no adjustment is required.

Dip Switch Setting

Time (seconds)

No. 3

No. 4

T1

T2

OFF

OFF

10

150

ON

OFF

10

180

OFF

ON

10

120

ON

ON

20

180

T1: Time to drain the water tank

T2: Harvest timer at pump out

Pump out always occurs on the 2nd harvest after startup. Then, depending on the pump- out frequency control setting (dip switch 5 & 6), pump out occurs every cycle, or every 2nd, 5th or 10th cycle.

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Hoshizaki DKM-500BAH service manual Harvest Timer dip switch 1, Pump-Out Timer dip switch 3
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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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