How To Troubleshoot Manitowoc Ice Machine Error Codes Quickly

 


A reliable ice machine is crucial in fast-paced commercial kitchens. Manitowoc ice machines are known for their durability and high performance, making them a top choice in the industry. However, even the best equipment can encounter issues. When problems arise, Manitowoc ice machines display error codes to help identify the cause. Understanding these codes and troubleshooting with the right Manitowoc parts can minimize downtime and avoid unnecessary service calls. This guide will walk you through common error codes and offer practical solutions to restore your machine to optimal performance.

Troubleshooting Manitowoc Ice Machine Error Codes

Here are the troubleshooting steps for common Manitowoc ice machine error codes. 

E01: Long Freeze Cycle

The E01 error code means that the machine has been in the freeze cycle for too long and this can lead to slow production of ice or in some cases no ice production at all.

How to troubleshoot:

  • Inspect the evaporator plate: A dirty or blocked evaporator plate can hinder the freezing process. To get rid of any dirt, the evaporator plate must also be cleaned with a soft cloth.

  • Check refrigerant levels: If the refrigerant is low, then the system will not be able to cool down to the required temperature. If you think that there is a problem with the refrigerant, then it is advisable to contact a professional technician to check and add the refrigerant.

  • Examine the thermostat: If the thermostat is not working well, then the machine will remain in the freeze cycle for too long. Check that the thermostat is functioning correctly, and if required, replace it.

E02: Long Harvest Cycle

The E02 error code indicates that the ice machine is too slow in the harvest cycle where the ice is released from the evaporator and then transferred to the storage bin.

How to troubleshoot:

  • Check the water system: Any problem with the water supply, for example, low water flow or blocked water supply lines, will affect the harvest cycle. Ensure that the water valve is fully opened and the filter is clean and not blocked.

  • Inspect the harvest motor: A failure of the harvest motor can lead to a delay or inability to release ice. The motor might need to be replaced or repaired if it is a failure.

  • Examine the evaporator: The formation of ice or minerals on the evaporator plate can disrupt the harvest cycle. This problem can be avoided by cleaning regularly.

E19: Ice Thickness Probe Fault

The E19 error code indicates a fault with the ice thickness probe, which measures how thick the ice is during the freezing process. If the probe is malfunctioning, it can cause the machine to produce ice that is either too thick or too thin.

How to troubleshoot:

  • Clean the probe: The probe can be affected by mineral deposits or ice buildup. Wash it with a soft brush or cloth to eliminate any dirt.

  • Check for misalignment: The probe should be placed in the right manner so that it can give the right thickness of the ice. Verify that it is properly positioned and unobstructed.

  • Replace the probe: If cleaning and realignment do not solve the problem, the probe may have to be changed. Consult a qualified technician or consult the user manual for advice.

E20: Water System Fault

An E20 error code is usually a sign of a water system issue, including low water pressure, a blocked water line, or a faulty water inlet valve.

How to troubleshoot:

  • Verify the water inlet valve to make sure it is fully open and that the water is flowing freely. If the valve becomes clogged, it should be cleaned or replaced.

  • Examine the water filter: An E20 error may result from a clogged filter that reduces water flow. If it's time to replace your filter, get a new one.

  • Analyze the water lines: Examine any bends or other areas of the water pipes that might be restricting the water's flow. Clear the obstruction so that the water can flow freely.

E29: USB Communication Fault

The E29 error code indicates that the ice machine has a communication problem between the control board and the USB module. This issue can cause the system to be unable to communicate with diagnostic tools or external monitoring systems.

How to troubleshoot:

  • Inspect the USB connection: Check that the USB module is well connected to the control board. Check for loose or corroded connections as these may be the cause of the communication problem.

  • Test the USB module: If the connection is secure, then the problem may lie in the USB module itself. Replace the module and check if it helps to solve the problem.

  • Reset the system: Sometimes, reset the machine to remove minor communication problems. Switch off the unit and then switch it on after a few minutes.

E04: High Condenser Temperature

The E04 error code is caused by a high condenser temperature and this greatly impacts the performance of the machine. This is usually due to inadequate air circulation or dirty condenser coils.

How to troubleshoot:

  • Clean the condenser coil: A condenser coil that is dirty or clogged will not allow heat to dissipate and the machine will overheat. You can use a soft brush or vacuum to clean the dust and other interfering particles on the condenser coil.

  • Ensure enough ventilation: Make sure the area surrounding the ice maker is large enough to permit adequate airflow. If the machine is placed in a small room, then it should be moved to a room with proper ventilation to help in the dissipation of heat.

  • Check refrigerant levels: Low refrigerant levels are also a cause of overheating. If you think that there is a problem with the refrigerant, then it is best to call a professional to check and add more refrigerant to the system.

Troubleshooting Manitowoc ice machine error codes quickly and using the right Manitowoc parts can minimize downtime and maintain efficiency. Regular maintenance ensures long-term performance and a professional technician can assist if issues persist. Written by Allen Rode for PartsFe, your trusted source for a variety of high-quality commercial restaurant equipment, including ice machine and convection oven parts.

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