Hoshizaki Ice Maker Failure Maintenance and Troubleshooting Record Report

1. Basic information of equipment

Equipment name: Hoshizaki Ice Maker

Model specifications: [DCM-120KE-P]

Production date: [-----]

Installation location: [APM]

Maintenance date: [04-11-1]

2. Description of fault phenomenon

The fault phenomenon of the Hoshizaki ice machine that was repaired this time is: the ice machine cannot make ice normally, the compressor works but the ice cubes do not form or form slowly, and there is a slight abnormal sound.

3. Troubleshooting process

Check power supply and control system

Confirm that the ice machine is correctly connected to the power supply and the voltage is stable.

Check the indicator lights on the control panel to confirm there are no abnormal alarms.

Try restarting the ice machine and see if it returns to normal.

Check refrigeration system

Observe the operating status of the compressor and confirm that it is working properly and has no abnormal sounds.

Use professional tools to check the refrigerant pressure and find that the refrigerant pressure is low.

Check the refrigerant pipe connections and find no leaks.

Further inspection of the expansion valve revealed that its working condition was abnormal, which may be the cause of insufficient refrigerant flow.

Check water system

Check the water inlet pipe and water filter to confirm that the water source is smooth and the water quality is clean.

Observe the running status of the water pump and confirm that it is working properly.

Check the water tank and ice tray and find no ice or blockage.

Check sensors and control systems

Check the temperature sensor to make sure it accurately reflects the temperature inside the ice machine.

Use a multimeter to check the sensor output signal and find no abnormalities.

Check the control system circuit board to confirm that there is no burnout or short circuit.

Check for other possible failure points

Check the ice machine casing and internal parts to make sure they are not loose or damaged.

Observe the ice making process and confirm there is no abnormal vibration or noise.

4. Failure cause analysis

Based on the investigation results, it is initially determined that the reasons why the Hoshizaki ice machine cannot make ice normally are as follows:

The refrigerant pressure is low, resulting in insufficient cooling effect.

The expansion valve is working abnormally, affecting the refrigerant flow.

There may be other potential points of failure that have not been discovered.

5. Maintenance measures and implementation

Replenish refrigerant

Use professional tools to vacuum the ice machine.

Add the appropriate amount of refrigerant according to the specifications of the ice machine.

Replace expansion valve

Disassemble the original expansion valve and clean the relevant connecting pipes.

Install a new expansion valve and adjust its working condition to optimal condition.

Comprehensive inspection and debugging

Conduct a comprehensive inspection of the ice machine to confirm that there are no other potential points of failure.

Start the ice machine, debug and run the test.

Observe the ice making effect and confirm that there are no abnormalities.

6. Maintenance effect evaluation

After the implementation of the above maintenance measures, the Hoshizaki ice machine has returned to normal ice making function. The ice making speed and ice cube quality both meet the required standards. At the same time, the ice machine runs smoothly without abnormal vibration or noise.

7. Follow-up suggestions

To ensure long-term stable operation of the Hoshizaki ice machine, it is recommended to take the following measures:

Clean and maintain the ice machine regularly to ensure that the water lines and refrigeration system are unobstructed.

Regularly check the refrigerant pressure and expansion valve working status to ensure stable refrigeration effect.

Regularly calibrate and test the control system to ensure it accurately reflects the internal status of the ice machine.

In case of abnormality, please contact professional maintenance personnel for troubleshooting and repair in time.

8. Summary of maintenance records

This time, the Hoshizaki ice machine fault repair and troubleshooting process went smoothly. By replenishing refrigerant, replacing the expansion valve, and comprehensive inspection and debugging, the problem of the ice machine not being able to make ice normally was successfully solved. The repairs were performed well and the ice machine has returned to normal operation. Subsequent regular maintenance and inspections will be carried out as recommended to ensure long-term stable operation of the equipment.

The above maintenance report is for reference only. The specific maintenance process and measures should be adjusted according to the actual situation. During the maintenance process, be sure to follow relevant safety operating procedures and the requirements of the manufacturer's maintenance manual.