Question about Ice-O-Matic ICEU220HA Undercounter Ice Machine

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What is a good suction pressure for ice machine

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Assuming it's R-404A refrigerant it will start up somewhere around 45-60 psi and drop to somewhere around 28-34 psi by the time it has built up a sheet of ice.

Posted on Oct 24, 2013

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1 Answer

Ice bridge to thick


there is a timer, adjusted by seconds, first make sure the condenser coil located under the ice bin is clean. the harvest is initiated by suction pressure once the pressure switch makes contact the time delay will time out initiating the harvest. you can fine tune the bridge with the time delay.

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Hoshizaki ice machine model km 900mwh low side suction line has ice building up on it all the way to the compressor


Is it making ice? Frost on this line is not that uncommon as it is colder than the air around it. Make sure you have good water flow over the evap plates. machine may just need a good chemical cleaning.

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What is hgv valve leaking by


The hot gas valve is activated during the machines harvest cycle letting hot gas defrost the evporator. If it is "leaking by " that means that it is not fully closing during the freeze cycle causing high suction pressures and inefficient operation of the machine. And maximum freeze cycles. If that is happening it will need to be replaced by a qualified technician.

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1 Answer

Scotsman ice maker cme 506 makes ice and turns off and blinks refrigeration


First check to make sure condenser fan is running during freeze cycle. Now check to make sure condenser coil is clean. Her is all the specks on the machine.
1. Ice production ( 500 at 70/50
2. BTUs per hour ( 7000)
3. Maximum times in Minutes. ( 50 freeze, 14 harvest.
4. Refrigerant charge ( R-404A ) ( A-D series: AC 32oz, WC 20 oz. E series AC 23 oz, WC 14 oz, F series AC 23 oz, WC 13 oz
5. Suction pressure ( PSIG ) 35-37 - end of freeze, 120-125-Peak in harvest.
6. Discharge pressure ( PSIG ) 240-260- 5 min in freeze.
165-175- minimum in harvest.
7. Metering device.( TXV plus distributor, E series and higher have two TXVs. superheat 3 to 15 deg F.
8. Average comp.amps. 10-11 during freeze, 11-12 during harvest.
9. Batch Weight. 6.5-7 lb
10. cycle time, 23 minutes @ 90/70. 19 minutes @ 70/50

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1 Answer

I replaced compressor for a hussman refrig and its hums loud


God day,
Some thoughts.
1. Are the evap fan motors running, and at full speed. That would give you abnormally low suction pressure.
2. Cap tube sized too small. or partial restriction in the dryer cap tube/dryer when brazing in the lines.
3. Low ambient. What's the temp the machine is running in.
4. Over sized compressor.
5. Moisture. God, 134A is touchy on that one.
6. Was original cap tube soldered to the suction line to create a heat exchanger. Needed on many apps. Definately would cause flash back on start up.
7. Superheat a little low, should be 12 to 15 degrees.

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1 Answer

Ice machine just hums


First off, you cannot use a bucket of water and a line to get the ice machine to operate. Ice makers don't have a suction pump in them, they rely on having a water supply line with pressure to push the water into the machine.

You can connect the machine to a water line and see if it will cycle, that is, take water into the unit without leaking.

Beyond that, in order to check out the unit, you will need to provide the Brand and model number in order to find a user's manual, which will provide all the details on operation and installation for it.

The good news is you might have a nice ice machine for free.

Hope you find this Very Helpful and best regards!

Sep 09, 2009 | Freezers

1 Answer

Hoshizaki KM-1600S too much water supply


If water is standing in the bin the drain is clogged. If water is raining down into the bin, Machine may not be level or the drain on the ice machine maybe partially clogged. If machine freezes up water will rain into bin too. Water fills ice machine while in harvest and continues to fill until ice machine`s suction reaches 49 degrees and the defrost timer times out.(usually 1-3 minutes after suction line reaches 49 degrees)

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1 Answer

Hoshizaki km-1300skf 3 beep error code


The 3 beeps indicates that the freeze cycle is longer than 60 minutes. with the suction pressure at 20, it sounds like low on charge (freon). I believe this is an R 404-A unit. Other things to look for are: Stuck float switch (in the up position), Water valve leaking, hot gas valve leaking, txv not feeding properly, weak compressor. Look at high side pressure too. It should not go below 210 psi during the freeze cycle. Low pressure should be in the middle to upper 40's psi.

Let me know if you need more.

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2 Answers

Low suction pressure high head pressure


That system has a restriction. Most common at TXV valve or capillary tube. Will need to be replaced by Refrigeration company. In this video I replaced TXV valve and filter drier due to the same issue You have. Its Ice Machine, Low side was at 5 PSI, High at 250PSI : 404A; should be around 55-65 Low; 250 -275 High. Replaced drier and TXV, machine works proper.

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