No Ice Production - Possible Cause

15. Thermistor

a) Loose, disconnected, or defective.

See "II.F. Thermistor Check"

 

 

 

16. Pump Motor

a) Motor winding open.

 

b) Bearing worn out or locked rotor.

 

 

 

c) Defective capacitor.

 

 

 

d) Mechanical seal worn out.

 

 

17. Thermostatic Expansion Valve

a) Bulb loose.

 

b) Operating erratically.

18. Liquid Line Valve

a) Closed in freeze cycle.

 

 

 

b) Open in harvest cycle.

 

 

19. Fan Motor

a) Motor winding open.

 

 

 

b) Bearing worn out or locked rotor.

 

c) Defective capacitor.

 

 

20. Water System

a) Water leaks causing short freeze time.

 

 

2. Freeze-Up

Defrost and clean the icemaker prior to diagnosing freeze-up. Fill out a freeze-up checklist. See the Hoshizaki America Technician's Pocket Guide or contact your local distributor for a copy of the freeze-up checklist.

Freeze-Up - Possible Cause

 

Harvest Cycle

 

 

1. Evaporator

a) Scaled up.

 

 

 

b) Damaged.

2. Cube Guides

a) Out of position.

 

 

 

b) Damaged.

 

 

3. Spray Tubes and/or Spray

a) Dirty.

Guides

 

b) Out of position.

 

4. Water Supply

a) Low water pressure.

 

 

 

b) External water filters clogged.

 

 

 

c) Insufficient water line size.

 

Minimum 1/4" Nominal ID (6 mm Nominal OD in the EU) copper

 

water tubing or equivalent.

 

 

5. Inlet Water Valve

a) Screen or orifice clogged.

 

b) Defective.

 

 

6. Float Switch

a) Dirty, sticking.

See "II.E. Float Switch Check

 

b) Defective.

and Cleaning"

 

 

 

7. Refrigerant Charge

a) Low.

 

 

8. Control Board

a) Harvest timer (S4 dip switch 1 & 2) set too short.

See "III.C. Settings and

b) Harvest pump timer (S4 dip switch 7) not in factory default position

Adjustments" and "II.C. Control

("G" control board).

Board Check"

 

c) Defective.

 

 

 

9. Bin Control

a) Actuator does not move freely.

See "II.D. Bin Control Check"

 

 

 

10. Thermistor

a) Loose, disconnected, or defective.

See "II.F. Thermistor Check"

 

38

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Image 38
Hoshizaki MRH KM-901MAH, MWH KM-515MAH, MRH/3, MWH(-M), MRH KM-600MAH KM-650MAH Freeze-Up Possible Cause Harvest Cycle
Page 37 Page 39

KM-320MAH, MRH KM-600MAH KM-650MAH, MWH(-M), MRH KM-901MAH, MRH/3 specifications

Hoshizaki, a leading manufacturer in the food service equipment sector, offers a diverse range of ice-making machines that excel in efficiency, durability, and innovative technology. Among the notable models are the Hoshizaki MWH KM-515MAH, MWH(-M), MRH KM-901MAH, MRH KM-600MAH, KM-650MAH, and KM-320MAH. Each model brings unique features designed to meet varying commercial ice production needs.

The Hoshizaki MWH KM-515MAH is particularly recognized for its high ice production capacity, generating up to 515 pounds of ice per day. This model incorporates advanced technology that ensures consistent ice quality and purity. The MWH(-M) variant often includes modifications to suit specific operational environments, ensuring reliability in diverse settings.

Similarly, the MRH KM-901MAH stands out with its ability to produce a staggering 901 pounds of ice per day, making it ideal for high-volume establishments. This model is equipped with Hoshizaki's unique "cubelet" technology, producing a soft, chewable ice perfect for beverages. It also features a robust stainless steel construction, enhancing its durability and resistance to corrosion.

The MRH KM-600MAH offers 600 pounds of daily ice output, while the KM-650MAH enhances that capacity to 650 pounds. Both machines prioritize energy efficiency and come with built-in energy-saving modes. These models feature advanced ice sensing technology that monitors production levels to optimize energy consumption and reduce waste.

On the other hand, the KM-320MAH is designed for smaller establishments, with a daily ice production rate of 320 pounds. Despite its smaller footprint, it maintains high production efficiency and is equipped with features like a built-in storage bin, saving space while ensuring a reliable ice supply.

Across these models, Hoshizaki employs various technologies, including air-cooled and water-cooled systems, offering flexibility depending on installation requirements. The ice machines are designed with user-friendly controls and features like self-cleaning capabilities, making maintenance straightforward and less time-consuming.

In summary, Hoshizaki's ice machines, including the MWH KM-515MAH, MRH KM-901MAH, and others, deliver exceptional ice production, durability, and efficiency tailored to meet the demands of any commercial kitchen or service establishment. With a commitment to quality, Hoshizaki continues to be a trusted choice for businesses needing reliable ice-making solutions.
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