An ice machine that used to make full cubes and now produces thin or incomplete ice needs a closer look. Start with its model number and a photograph of the change. “Hollow” means different things on different designs, and the cube shape alone won’t tell you which part failed.
Compare with the ice the machine is designed to make
A hollow-looking center is not automatically abnormal. The Scotsman CU50 service manual, page 11, distinguishes an acceptable shallow indentation from an undersized cube. That drawing is for the CU50; other machines have their own.
Compare several fresh batches with the model illustration and with what the machine previously produced. Note whether every cube is affected or only part of the batch, whether cubes are joined differently, and whether the bin is filling more slowly. These observations give the technician a clearer starting point than “needs more refrigerant.”
Water delivery is more than the filter
Record the last filter replacement and any recent building-water work. From outside the equipment, look for an accessible supply hose that is visibly kinked or damaged. Do not disconnect lines or dismantle a valve to test a theory.
The Hoshizaki KM-80/115/160 B_J service manual lists several water-system and cycle-control causes of abnormal ice, including insufficient water and problems affecting circulation or freeze duration. Those tables call for model-specific checks, since you can’t diagnose from appearance alone.
A pressure reading elsewhere in the building does not describe everything happening at the machine. Service may include checking the supply while water is flowing and assessing the filter, inlet components, reservoir and distribution system. Pressure limits differ by model (the CU50 manual gives 20 to 80 psi), so use the figure in your manual.
Review cleaning records before changing settings
Keep the dates and products used for maintenance. A technician can compare that record with deposits and water distribution inside the machine. Repeating a cleaning cycle with the wrong product or changing cube-size controls can obscure the original complaint.
Scotsman’s CU50 manual gives separate instructions for removing scale and sanitizing the bin on page 16. Its chemical quantities and sequence belong to that model. Follow the manual for your machine, including who may perform the work, the specified cleaner and the steps required before returning it to use.
When refrigeration checks become relevant
Low output and uneven ice can warrant refrigeration testing, but neither means low charge. The Manitowoc S1400M service manual’s operational analysis distinguishes refrigeration faults through a sequence of observations and measurements. Even a low suction reading needs context; it is not a direction to add refrigerant.
The repair should follow the fault that was established. Depending on the machine, the investigation may involve airflow around the condenser, water behavior, controls, cycle timing and the refrigeration circuit. A service report should explain the findings, not point to a cube photograph as evidence of a leak.
Prepare for the visit
Have the following information available:
- Model and serial number, plus the exact error display if one appears.
- Photos of a fresh batch and a description of how it differs from normal.
- Whether total production changed, and when you first noticed it.
- Filter, cleaning and service dates, with any recent water-supply interruption.
- Details of a leak or an unusual operating sound.
You do not need to open service panels or adjust internal controls to gather that information. If the owner manual calls for stopping the machine for the observed condition, follow it and tell the office what happened.
Book an ice-machine diagnosis
ADRIUM services commercial ice machines across its Bay Area service area; see commercial ice machine repair. The diagnostic visit is $99, credited toward a completed repair, and includes additional units checked during the same visit. We confirm the repair price and timing after diagnosis.
Call (925) 999-4095 or book a service visit. Include the model and the change in ice production so the technician receives the relevant details.