How to Fix Hoshizaki Commercial Ice Machine Error Codes
- restaurantequipmen23
- May 5
- 6 min read
Hoshizaki commercial ice machines are widely known for their durability and high performance, making them a popular choice for businesses in need of reliable ice production. However, like any complex equipment, they may encounter errors that affect their functionality. These error codes are designed to alert users to specific issues such as temperature fluctuations, water supply problems, or refrigeration malfunctions. Understanding these error codes is crucial for quick troubleshooting and effective repairs. In this guide, we will cover the most common Hoshizaki ice machine error codes, their possible causes, and the steps you can take to fix them, ensuring minimal disruption and optimal performance. Regularly replacing essential Hoshizaki ice maker parts can also help maintain your unit and prevent frequent breakdowns.
Understanding Hoshizaki Ice Machine Error Codes
Hoshizaki ice machines display error codes on their digital control panel, each indicating a specific issue with the unit. These codes are designed to simplify troubleshooting, allowing technicians or users to quickly identify the problem. Error codes typically start with "E" followed by numbers (e.g., E1, E2) or sometimes an alphanumeric combination. Recognizing and understanding these codes is essential for accurately diagnosing and fixing issues, helping to minimize downtime and maintain optimal performance of the ice machine. Knowing what each code means allowing for efficient and effective repairs, often involving the replacement of faulty Hoshizaki ice maker parts.
Regular maintenance, including inspecting and replacing Hoshizaki ice maker parts. This proactive approach ensures that your unit continues to perform at its best, saving time and costs in the long run.
Common Hoshizaki Ice Machine Error Codes and Their Fixes
Even the most reliable ice machines can encounter problems. Being aware of common issues and how to address them—often with the help of Hoshizaki ice maker parts—can minimize disruption and downtime.
E1 – Freeze Cycle Backup Timer Error
The freeze cycle backup timer expired, indicating the evaporator temperature did not reach the required level within the set time. This could be due to a number of issues such as a leaking inlet water valve, a malfunctioning hot gas valve, a stuck thermostatic expansion valve (TXV), low refrigerant levels, or a failing compressor. The evaporator fails to reach the necessary freezing temperature, possibly because cold water isn't entering properly, the compressor isn't running efficiently, or the refrigerant charge is low. This leads to the timer error.
How to Fix It:
Replace any leaking inlet water valves with Hoshizaki ice maker parts.
Ensure the hot gas valve opens and operates correctly.
Repair or replace the TXV if it’s faulty.
Check refrigerant levels and recharge if needed.
Test the compressor for performance and replace if inefficient.
E2 – Harvest Cycle Backup Timer Error
The harvest cycle backup timer expired, meaning the ice wasn't released within the set time. This issue may arise due to a faulty thermistor, which fails to detect the correct temperature, or a malfunctioning hot gas valve that doesn't open properly during harvest. A leaking TXV can also cause irregular refrigerant flow, affecting the ice release process. Low refrigerant levels or a weak compressor can further exacerbate this issue.
How to Fix It:
Replace the faulty thermistor.
Verify the hot gas valve opens during harvest.
Repair or replace any leaking TXVs with Hoshizaki ice maker parts.
Check refrigerant levels and adjust as needed.
Test and replace the compressor if it is underperforming.
E3—Water Tank Opening Backup Timer Error
This error occurs when the water tank doesn't open fully within the set time, causing a backup timer error. The root cause may be a malfunctioning actuator motor or issues with the control board that prevent the tank from operating correctly. Mechanical linkages may also be obstructed, preventing the tank from opening smoothly. Low power to the actuator motor or a failure in the control board can also trigger this error.
How to Fix It:
Replace the actuator motor if faulty.
Inspect and replace the control board if needed.
Remove any mechanical obstructions blocking the water tank.
Lubricate moving parts to ensure smooth operation.
Test the system after repairs to ensure proper function.
E4 – Water Tank Closing Backup Timer Error
This error occurs when the water tank fails to close fully within the allotted time. A malfunctioning actuator motor or a faulty control board can prevent the tank from closing properly. In some cases, mechanical obstructions or a lack of lubrication on moving parts can cause the closure to fail. Low actuator power or a failure in the control board may also contribute to this issue.
How to Fix It:
Replace the actuator motor if it's malfunctioning.
Check the control board for issues and replace it if defective.
Ensure there are no obstructions in the tank’s closure mechanism.
Lubricate moving parts to facilitate smooth closing.
Test system operation after repair to confirm functionality.
E5 – High Evaporator Temperature Error
The evaporator temperature exceeds 60°C (140°F) for more than 5 seconds, triggering this error. Possible causes include a stuck hot gas valve that prevents proper temperature regulation, hot water entering the unit, or a shorted thermistor that gives inaccurate temperature readings. Refrigerant leaks or a malfunctioning compressor may also cause the temperature to rise beyond the safe threshold.
How to Fix It:
Ensure the hot gas valve is functioning and not stuck.
Verify that only cold water is being supplied to the unit.
Replace any faulty thermistors with Hoshizaki ice maker parts.
Inspect for refrigerant leaks and repair as needed.
Test the compressor and replace it if it's underperforming.
E6 – Low Voltage Error
The unit experiences a low voltage condition, where the voltage supplied is below 92V, triggering a shutdown. This often happens due to a partial power outage or brownout, causing an unstable electrical supply. Loose connections, a faulty circuit breaker, or improper power supply setup can also lead to this error. Low voltage prevents the system from functioning correctly.
How to Fix It:
Check and stabilize the power supply voltage.
Use a voltage regulator to maintain proper voltage levels.
Tighten any loose electrical connections.
Inspect the circuit breaker for faults and replace if needed.
Consult an electrician to ensure the proper power setup.
E7 – High-Side Pressure Switch Open
This error occurs when the high-side pressure switch opens, indicating an issue with the refrigeration system. It can be caused by high refrigerant pressure, a blocked condenser, or a malfunctioning fan motor that affects the system’s pressure balance. Improper airflow around the condenser or overcharging the system with refrigerant can also trigger the pressure switch to open.
How to Fix It:
Adjust refrigerant levels to the proper charge.
Clean the condenser to remove blockages and debris.
Inspect and repair the fan motor if it’s malfunctioning.
Ensure proper airflow around the condenser.
Test the system after repairs to confirm proper operation.
E8 – Compressor Lock Error
This error is triggered when the compressor is locked and fails to start. The causes include a seized compressor, a faulty start relay, or insufficient voltage supply to the compressor. In some cases, overheating of the compressor or an internal failure may cause it to lock. The system fails to operate normally when the compressor cannot start.
How to Fix It:
Test and replace the compressor if it’s seized.
Check and replace the start relay if faulty with Hoshizaki ice maker parts.
Ensure the power supply voltage is adequate.
Inspect for signs of compressor overheating.
Replace the compressor if internal failure is detected.
E9 – Water Fill Timeout
This error occurs when the system fails to fill with water within the designated time. Possible causes include a clogged inlet filter, a defective water inlet valve, or low water pressure from the supply. A malfunctioning solenoid valve or control board failure can also result in a water fill timeout, preventing the system from getting enough water for operation.
How to Fix It:
Clean or replace the water inlet filter.
Replace the faulty water inlet valve with Hoshizaki ice maker parts.
Ensure adequate water pressure is supplied to the system.
Inspect and replace the solenoid valve if defective.
Test the control board and replace it if faulty.
E10 - Defrost Sensor Fault
The defrost sensor failed to detect the defrost condition, triggering the error. This can be caused by a disconnected or open thermistor, corroded sensor contacts, or internal sensor failure. Improper sensor calibration or a faulty control board may also contribute to the issue, preventing the defrost cycle from being detected and completed correctly.
How to Fix It:
Reconnect or replace the thermistor.
Clean the sensor contacts to remove any corrosion.
Calibrate the sensor to ensure proper detection.
Replace faulty defrost sensors.
Inspect and replace the control board if needed.
Addressing Hoshizaki commercial ice machine error codes involves understanding the root causes and implementing targeted fixes. Regular maintenance, such as inspecting and replacing Hoshizaki ice maker parts like water valves, refrigerant systems, and sensors is crucial to prevent common issues. If troubleshooting doesn’t resolve the problem, it’s best to consult a professional technician to ensure your machine runs efficiently and avoids costly repairs or downtime. Proper care, including timely replacement of Hoshizaki ice maker parts, keeps your ice machine operating smoothly and extends its lifespan.
Written by Allen Rode for PartsFeCa, your trusted source for a variety of high-quality commercial restaurant equipment, including commercial oven parts and ice maker parts.
Comments