Question about Hoshizaki Freezer Commercial Ice Machines - KM900MRH Commercial Ice Machine

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Model km-250baf hoshizaki with weighed in correct amount of 404a the head preasure risies to over 400 psi i think it is the txv advise me if i am right

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There are a lot of variables that cause high head pressure. Be sure the cool ing fan is operating properly. It should come on whenever the condenser coil feels warm to the touch. It will cycle on and off as the pressures change. A clogged up coil will also cause high head pressure. If you don't have sufficient water flowing over the evaporator plate, where the ice freezes, the head pressure will go up. You need to check the low side head pressure as well. Weighing the charge is a good start to charging the machine , but the first question I would ask is why are you charging it? Was there a leak, or compressor change?
If you had a compressor burnout, did you replace tthe drier-filter?If not, it may be stopped up from burnout residue. That will also cause high head pressure. If you did not vacuum the system there may have been refrigerant still in the system before you started the new charge. Check the items I mentioned and see if that helps.

Posted on Sep 05, 2010

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Posted on Jan 02, 2017

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