An Older Ice Machine With a Production Problem
Author’s Note: This month’s troubleshooting problem, a very specific one that might take some research if you’re not familiar with the process of combustion analysis, is a result of a request from a reader. If you have suggestions for a problem, please, write or email. You can reach Jim directly at Technical Training Associates, HC 70 Box 3172, Sahuarita, AZ 85629 or at tta@dakotacom.net.) tta@dakotacom.net.
By Jim Johnson
Contributing Editor
In this month’s troubleshooting situation, we have a restaurant that has called for service on an ice-cuber. It’s a standard 208/230-volt single-phase unit that employs a fan-cooled condenser, and the customer’s complaint is that the cubes are much smaller than they normally are, and that, at times, there seems to be water in the storage bin.
When you arrive, you find:
- The unit, at the moment, seems to be running normally in the freeze mode with the compressor and condenser fan motor operating OK. (See the diagram in Figure One).
- Water flow from the distribution tube is normal and the water flow over the evaporator coil is also normal. (See Figure Two)
The float valve is maintaining a proper level in the sump. - The water curtain is properly in place and no water is splashing into the bin during the freeze cycle.
- There is excess water in the bin and the cubes are smaller than normal.
With the freeze cycle evaluated, you initiate a defrost cycle by placing a resistance wire jumper across the ice thickness probe. (See Figure Three)
When you take the above action, the unit goes into the harvest cycle, but water continues to run full from the distribution tube above the evaporator.
Your troubleshooting question: What is the component that is most likely responsible for the conditions we noted above?
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