Safety Limit #2 On Manitowoc Ice Machine January 09 2014, 133 Comments

I have a Manitowoc ice machine QD0202A. It keeps tripping the breaker. I have to reset. What could be causing it. Any help would be greatly appreciated.

I have a BD0152A ice machine, it’s not making ice at all, I’ve cleaned it but it didn’t help. It has water and power. Any help would be appreciated.
Jim

I have a qd0213w replaced compressor but now i turn on unit and it does no energies compressor green light is lit on board not sure why it is this is happening before with old compressor it would turn on after 15 seconds but the compressor would then kickout after 5 seconds and be very hot looking for guidance

I have a Manitowoc Model# SD0322A 24 inch Ice machine that has stopped making ice. When i turn it on it appears to function properly and then after approximately 10 minutes the fan begins cycling on and off every 2 seconds and never makes any ice. There are only two lights on and both are green. The compressor is running and the creating a frost pattern. Any suggestions? Prior to this everything was working fine.

I am Chief Steward in profession our Manitowoc Ice Machine is on HPCO active after the brownout and power supply back. I call the service Technician and findings is defective control board He didin’t attempt to reset the HPCO . If HPCO still open How it will be fix? I replacing the Control board is the ultimate options or there is another way how to solve /fix the HPCO active problem.

A friend has a store with an older Manitowoc BY0455W. The system was not running correctly I suspected the Ice thickness probes so we cleaned the system and adjusted the probes for a thinner sheet. It makes ice then the harvest light comes on for aprox 30 seconds the Ice falls much later 20-25 minutes and the system stops. After a power cycle it will do the same. The curtain light is on while the bin is closed. when I turn the machine off and on from the switch the harvest light blinks 2 times. I know this is a safety stop but where should I look next. The sub cooling and super heat pressures were a little low based on measured temp and pressure for the r402B or suva HP81 refrigerant. I am a licensed electrician with a universal HVAC card but have never worked on Ice machines any help or guidance would be appreciated as I am trying to help my friend.

QY0214A – nothing happens when putting switch in ice/wash position. There is power to the unit as I can manually push contactor in and energize compressor. I leaned toward bin switch, but I don’t believe the bin switch is needed in wash position? Fuse on bottom of control board is good. So my only other thought would be control board?

hello, so our ice machine stopped working when a team of baseball players came to stay with us and took every piece of ice from the machine.. at first it was freezing the water but would not harvest or drop the ice when done. after replacing the ice thickness probe with a new one when we turn on the machine the sr 2 light flashes twice and the machine seems to be working correctly and going into harvest but will not freeze the water to make the ice. i made sure the curtain is not damaged and that the magnet wasnt damaged as well. weve already cleaned the machine with cleaner as instructed and dont know what else to do. i was looking for a reset button but i guess our machine does not have one. a man i had talked to mentioned something about by passing the refrigerant or something like that but couldnt explain how to do so. please tell me you can help me before i go crazy…

I cannot thank you enough for the forum post.Much thanks again. Fantastic. Reichenback

hi,i have a manitowoc ice maker model # qy0174a when i first turn the machine on it works fine for a day or so then it stops making ice i would have to unplug the machine and then it would start working again for a day or so .. i was told the control board is bad i have no problem replaceing it if that fixes it but didnt know if there is any other things that may cause it before i replace the board

thank you

manitowac ice machine model sdo452a my issue is when water valve opens dump vaive shuts down,water valve drops votage after 1 minute running in ice makingmode or cleaning mode stumped need help.

Hello

We have a Manitowac ice machine. It is not making any ice and the water is flowing and draining all the times from the outlet. Anu help and suggestions greatly appreciated

I have a sy0304a manitowoc ice machine that I’m getting two flashes. I’m getting no water and I have replace the inlet valve and still have nothing

MY MANITOWOC IS 10 YRS. OLD. DURING THE HARVESTING SHEETS OF ICE COME OUT RATHER THAN CUBES. WHAT COULD BE THE PROBLEM? WOULD A GOOD CLEANING RESOLVE THIS PROBLEM OR IS THE MACHINE TOO OLD AT THIS POINT? THANKS FOR YOUR HELP.

Hi I have a QYG134A undercounter ice machine I changed ice thickness sensor unit works 11-15 freeze cycle sensor send signal to board for 10 seconds call for harvest the ice thickness bridge is about 1/8" pressures low side 115 psi high side 180psi ??? I think don’t remember now . Ice batch start to move foward but it don’t make it to drop before 3 1/2 minutes harvest I level the machine back and sides front I can’t make the batch to drop
Any answers

If the red light is the harvest light, well it keeps flashing and my ice machine constantly shuts down. does it have something to do with the red light?

I have a SY0424A model manitowoc. Been running fine for years. Then was having trouble with the ice falling. Turned it off to let the ice that was on the board to melt off. Then Turned it back on and the red light will flash twice then shut off completely. Completely stumped. Wanna see if this is something I can fix myself before I pay for someone to come fix it.
Thanks Mike

I have a model SY0304A I came in to no power at the control board but there was power to the machine. I shut if off and disassembled and cleaned the part then ran it through the clean cycle and everything was ok. After it was cleaned I switched it to ice and it ran a full cycle and dropped ice. When it went to make ice again it would shut off a few seconds after water started flowing over the evaporator. Again no power to the board. After a few minute it comes back on and does the same thing. Is this high limit?

I have a Manitowoc Q130 undercounter Icemachine… How warm should the top of the water pump get? It is very warm to the touch.. is this normal? Thank you for your attention..

I have a Model QD0212A that we plugged in after being off for a while. The condenser fan is not starting on it’s own. We can force the fan on, unit will go through 3 cycles and never make ice, then just shut down. Plate gets cold, but not freezing ice. We got it to make one batch with another fan blowing across the condenser coil (entire unit is clean), but it would not make after that. Any thoughts? Could this be a charge issue? Stuck in harvest cycle? Any help on this would be appreciated.

@Terry, this may be caused by a failing bin switch. Just because the ice falls, doesn’t mean the control board knows to cancel the harvest cycle. The only thing that tells the ice machine that it’s harvested the ice, is the bin switch. This can be diagnosed by OHMing the proximity switch out and looking for consistency, although most people just replace. Next, make sure your water curtain is not warped and the ice machine is level and that all ice falls clear, instead of holding door open.

The correct bin switch is a OEM part number 2301483.

sorry im not computer litterute but I have a qy0804 flashing a red light was after 3 drops . cleaned it now it drops it till 5 drops then shuts down . is it 45 seconds from the time the harvest light comes on ? or what am I missing? when I shut the machine down and restart it I get two flashes on red light.

I forgot too tell you the red light was flashing .

I have a qyo804 cleaned it got two more dumps . but I see it should take 45 seconds to drop . is this time when the harvest light comes on and goes off . or what I got two blinks when I shut it off and restarted it

@remigio, sounds like a bad bin switch or your curtain is not making good contact with the bin switch. First, make sure the machine is 100% level front to back and side to side. Next, make sure the water curtain is laying flush and not warped. If these are good and you still have the problem, replace the bin switch, as it’s the only thing that will terminate a harvest cycle, other than a safety limit.

Hi,
i have QD 0802 A. When I start it, it freezes normally. At one point (after 10-12 minutes, so it’s normal), it goes into harvesting, but the harvesting stops after about 30 seconds and goes back to freezing. It’s always 30 seconds so it shouldn’t be some loose contact or something. It does that for hours (I left it unintentionally). Any ideas?

First of all, I am a refrigeration specialist and do this for a living, but this one has me stumped! I have a Manitowoc Model No. QD0422A.

Making about three batches and quitting. I’ve cleaned all the parts (thickness probe, water level probe). Also appeared to have a refrigerant leak so I recovered the gas, then weighed in new charge to spex (24 oz) and restarted.

Still making about three batches and quitting.

Mantiwoc ice machine will not refill w/ water after the first batch of ice is made… Machine has been cleaned and a new water level sensor has been replaced…used water inlet valve was replaced (it was removed originally due to a small leak from the upper seal) machine starts pumps water that’s in the bin then as the water starts to freeze and machine calls for water it will not replenish water in the storage bin and the motor runs dry

@Sam, Your water inlet valve should only be letting water in when it has power. You could check the valve to see if it’s getting power, while allowing water in. If it does not have power and water is still entering the trough, then replace the valve.

@Mark, probably just a dirty or failing ice thickness control. Unplug the ice thickness probe directly from the board, then turn your machine on. It should continually freeze and never harvest, at least for 60 minutes. If this is true, clean or replace your ice thickness control.

I have a Q210. When I start it up it goes into the harvest mode soon after before any ice can form. I can trip the bin switch to make it think it was a harvest and it may start making ice or it may run a little bit, may form a little ice, but then go back into harvest cycle again. It will start making ice after one to four times doing this. After it fills up it may start this all over again or it may start off making ice until it fills up again.

I have a qy0455w ice machine and the water trough fill to sensor and the water light then turns on, but will not then shut off it keeps running water and overflows trough and doesn’t flash any codes, runs water until you shut it down, i have also cleaned machine and parts, still no dice.

Lynn,

I have cleaned the ice machine in and out with a nickel safe cleaner as recommended. The ice machine will make ice three cycles and then it shuts off. I can restart it and it will do the same. I have not changed any other parts yet. The harvest light will blink twice after the machine is turned off and turned back on and then starts making ice again for three cycles. What is the next thing I can try?

@Woogene, I replied directly to your email, thanks for the video!

The problem you are experiencing is most commonly caused by a clogged screen on the bottom of the water pump. I recommend removing the screen completely, to solve this issue and make sure the entire machine is clean of calcium build up. You want constant, rushing water through the pump, up the vinyl tubing, and out through all the holes on your distribution tube. Any restrictions can start to cause slushing problems.

I’ve got a qy0214a (undercounter 200lb machine). Evaporator is clean, float valve is new. When the water starts to pump, the trough fills to the right level w/ water. The pump keeps cranking, and then all of the sudden, a tiny bit of slush/ice comes out of the top of the pump (where the pole is spinning) and when the slush/ice hits the water in the trough, the entire thing freezes over and clogs the pump with slush/ice. Any idea what’s happening?

@Dean, not sure, what is the model ice machine you are attempting to repair?

@Pinal, ok, you need to actually time the cycles of the ice machine. Turn it off then back to the ICE position. Use your watch to time how long it’s in freeze, then watch the control board for when it goes into harvest. Please report back these times so that I can better help you nail down the issue.

There is no safety limit LED indication, when it shutdown I see BIN LED and WATER PROBE LED ON. Based on that I figured it out machine is in freeze cycle. Also, when I remove Ice machine power cord from outlet and keep it aside for an hour and than plug back in it works for the first cycle and gives the ice. If I keep it ON than it just loop back ON for 2-3 minutes and OFF again for 3 minutes.

The ice makes sheets and not individual cubes what could be the problem with the process?

@Pinal, when it shuts down, are there any lights on the board? This will tell us if it’s shutting down on a safety limit or a high limit cut off.

Hi, I have problem in Manitowoc Ice machine model SY0304A. It is keep shutting down while on freeze cycle. Hardly runs for 2-3 minutes and goes down. What could be the problem? Any suggestion because don’t know what should I need to get it fixed?

@Felix, I’d be happy to help, however I need more information. The safety limit light is giving you an exact code, I need to know how many times it’s flashing, before stopping and repeating. Next, I need you to turn the machine on and time the cycles. Let me know how long it’s in the freeze cycle, then how long it’s in the harvest cycle once initiated.

If you can do this let me know or if you need further help, just send me an email and I’ll help however I can. You can reach me at sales@icemakerpartsshop.com.

Hi I have a manitowoc model qy0450a, my machine starts making ice, within an hours my harvest light keep flashing continually and stop making ice. I restart my machine again, it keeps on doing the same thing.? Can you help me??

@Alex, when are you performing this bin switch test? This will only work to terminate a harvest cycle. If the machine is in the middle of the freeze cycle, it will not shut the ice machine down.

Also, did you use an OEM bin switch? They can be intermittent and sensitive, the only way to truly test a bin switch is by OHMing it out and looking for consistency.

I’ve just finished giving a good cleanup an a q model cuber. Just dialed in the thickness probe and l fixed some refrigerant leaks. Got the machine to make some nice ice but to test the bin safety i let the curtian out for the 6 seconds and the macine didnt turn off. I thougt it was the bin switch and replaced did the test again and didnt pass. Does it indicate a bad control board??

@Kandice, that’s not enough information for me to properly diagnose. However, I do recommend checking water flow, especially to your water-cooled condenser. If it’s starving for water, it’ll take an extra long time in the freeze cycle.

Also, when was the last time you did a thorough cleaning on the evaporator and not just ‘clean’ mode?

My Manitowoc QY0215W is not making very much ice at all. Do you know why this is happening?

I believe you are asking me why the harvest light is flashing continuously. Not knowing your model number I can only assume. It means there is either water making contact with your ice thickness control, by splashing on it while running(which is normal), or it’s giving you a safety limit. You have to read the number of grouped flashes to know what safety limit.

ice qube machine hearvest light continu flsh why

@Suny, it is likely to be 1 of 2 things.

1. Your water level probe is not sensing properly. Look at the control board, if the water level light is on, but water is still entering the trough, replace the probe.

http://icemakerpartsshop.com/products/2006549-manitowoc-water-level-probe

2. Your water inlet valve is stuck open, allowing water in at all times. This can be caused by trash holding the plunger open or a failed valve. To be sure, check to see if water still enters the trough when the machine is turned off. If it does, take apart the valve, check for debris or replace.

http://icemakerpartsshop.com/products/000009123-manitowoc-and-kool-aire-water-inlet-valve-115v-60-1

I have a Manitowoc SY0304a that is overflowing water from the trough and melting the ice in the bin. Any suggestions would be greatly appreciated.

@Lou, do you have an auto-clean installed on your ice machine? If not, then there is no way for it to go into clean cycle on it’s own, unless toggled accidentally by an employee or the toggle switch or control board is failing. This would be incredibly unlikely. In my experience, someone is probably thinking they are turning hte machine off or on at a certain time and inadvertently clicking clean mode.

If put in clean mode, even for a second, it will force it to run it’s clean mode for a locked in period of time. This is usually 25 minutes, even if the toggle switch is reset at the 20 minute mark, it will reset the cleaning cycle back to minute 1.

our manitowic Q series ice machine goes to the wash cycle every morning even though toggle switch is in the on position. how can we stop this? it makes ice, eventually, but the ice is, then, sitting on top of a puddle of half melted ice & water.

@Luigi, I’m not familiar with an e02, what is the model of your ice machine?

i have an e02 code long freeze code

@Ray, have you checked your agitation timer? It’s possible that timer is malfunctioning? It’s also possible that your chute is broken or one of it’s brackets. Below is a link to the ice chute break down, so that you can see the individual components that may be affecting the ice dispensing.

https://cdn.shopify.com/s/files/1/0287/1070/files/QPA310-parts.pdf?709

Hi Lynn,
Thank you for the response. The dispenser is a Manitowoc QPA310. Hope you can help.
Thanks.

@Ray, sounds like a problem with your dispenser and not the ice machine model you mentioned. Do you have information on the dispenser? I might be able to help, but I do not sell parts for dispensers.

@Parag, if the fins are flat you can simply brush them out straight. I would not normally recommend a condenser change, as this is a refrigeration component that requires someone with a refrigeration license to change.

Lynn, I replaced the bin and cleaned the evaporator 2 to 3 times and everything is working fine now. Thanks for your help. One more question, condenser coil is in bad shape. Is any any replacement coil available?

I have a QD0202A ice machine and dispenser.

Ice machine works great but it randomly will empty the hopper. It will do this anywhere between 2 days and 6 weeks but it eventually dumps all the ice on the floor. I’ve replaced the push button switch and it’ not sticking. Any other suggestions? If there’s parts replacement involved, are they still available? Do you have them?
Thanks,
Ray.

@Parag, it’s possible the unit is shut off on high head pressure. Are there any lights ever visible on the board? Also, the bin switch MUST be making for the ice machine to start up. Make sure your magnet is good, water curtain isn’t warped and making good contact. Bin switch replacement may be necessary, especially on that old of a model machine.

Hi, I have ice machine model # JD0452A. The problem is that it will not start at all. There is good voltage (121 volts) on the board but there is no lights on the board. Sometimes moving the curtain repeatedly gives a very dull glow light on the bin switch light and goes out. Don’t know what is the problem. Thanks

Hi Veronica. At this point you may want to contact a trained service technician to look at your ice machine. You may be having a refrigeration problem at this point or one that involves the water regulating valve on your water-cooled machine. The only way I can help you diagnose it is if you time your cycles when turning it on and verifying if you are getting any safety limits, when the machine shuts down.

If you want, time your cycles, how long in freeze, how long in harvest. Also, take note of what parts are energizing and denergizing during the cycles. This is the only way to diagnose further.

I’ll help if I can, feel free to email me what you find: sales@icemakerpartsshop.com

I have a BD0423W Manitowoc

HELP!

I have replaced the curtain , the ice thickness control , machine has thoroughly been cleaned., with nickle free cleaner
and it will shut itself off after 3 /4 times of dropping ice . then when i turn it back on the ice doesnt freeze or accumulate
on the entire tray of ice making it lop sided and then I keep adjusting the ice thickness control unil i can get one batch of good ice.

Thanks
Veronica

@Ned, sounds like it is still in it’s cleaning cycle. It must complete the cleaning, uninterrupted, before it will go back to making ice. Anytime you toggle the switch or kill the power to the machine, it would restart that timed cleaning cycle.

Manitowoc ice machine i press on cleaning and water did go thru the coil and when I put back in on position red light come on, I hear click and then green light came on but not compressor and fan coming on? Can someone tel me what is the problem. Thank you.

@Kevin, The Q130 does not have a water level probe or a water inlet valve. The Q130’s operate off of a float valve. Could you please confirm your model number?

Manitowac QY130 wont fill with water , Water level light stays on even with no water. Unplug water level probe light goes off still dosent fill with water no voltage to fill valve

@Sami, sorry, that is too little information. Will it never harvest the ice? Does it make a nice batch of ice in a reasonable amount of time?

I have Manitowoc Q450 ice machine. After clean the ice machine and ran through clean process and turn the switch back to ICE. It does not harvesting ice. What seems to be the problem?

@jena that is a newer ice machine, which uses an acoustic ice thickness control. I would think that replacing it should take care of your problem, but you may want to consult a local service company to be sure. We keep that probe in stock, part number 000008660.

Hi – My harvest light comes on no matter what – turn it on, starts the water, on comes the harvest light. If I pull the thickness control off the mount and move it completely away from the grate, it stays off, but I can’t in reality stand next to the machine and touch the probe to the ice every time it gets thick enough to harvest. I’ve read through most of the comments and FAQ’s but am not seeing anything similar to what is going on with my machine. My machine : ID-0302A/B-400

Ian, are you sure your machine is not just off on high head pressure? Are you getting the proper power to the molex connector on your control board? You should have at least one light on your board, the bin switch light, otherwise the machine will not go into freeze cycle.

You have the curtain door in place and it has a magnet on it? Bin switch is good?

No lights show up on the board at all when switched to the on position or the wash cycle.

“The switch is good.

I changed the pins around so that the wash cycle in switched to the left and the run is switch to the right(reverse) and the run cycle still doesn’t work. I also tried hard wiring the ground (wire 24) directly to wire 20(for the run cycle) and I did not get anything. If I push the relay closed (physically using a screw driver) the circuit works but it states that after 30 seconds the freeze cycle should start and it doesn’t. After 30 seconds no water starts to flow or anything. The water does flow during the freeze cycle however. Maybe there is a limit that is not being reached to allow the relay to be energized?

@Ian, sounds like you may have a bad toggle switch. Are there any lights on your board at all?

No limits codes show when switched to the on position. It seems that the relay doesn’t close on its own. If i close it manually the compressor kicks on and the fan as well but the water does not begin to flow after 30 seconds.

I have a QDO 212a that, when switched to the on position, does not turn on at all. None of the components make any sounds. the switch is good, there is proper power supplied to the machine. It was working fine last week. I read that the bin switch could cause this, I held a neodymium magnet to the bin switch and it still did not turn on. If I put the switch to the cleaning cycle, that starts to work.

@Tom, the proper way would be to use a nickel safe cleaner solution. Run the ice machine through ti’s clean cycle with this solution and then break down the individual parts and soak. Rinse thoroughly, then use a soft nylon brush to scrub the insides of each cubby hole on the evaporator where the ice forms.

Test your harvest time to see if it’s actually taking too long to harvest or a bin switch malfunction. To do this, once the harvest initiates, start your stop watch. If it takes more than 2 mins, that’s a little too long, which can prob be fixed with cleaning. However, if it drops in 1 to 1.5 mins, then perhaps you have an intermittent bin switch issue or a cracked/missing magnet on your water curtain.

Hi, I have a Manitowoc QDO 452 A, when in the ‘ice’ setting it will make a few batches and then shut down. The red light will start flashing repeatedly. When shut off and turned back on I get limit #2. It will then go through a few batches and do the same thing indefinetely.

I have replaced the water sensor and bin switch for previous problems.

What would be the proper way to clean the unit?

Thanks!!

@Maryanne what is the model number of your ice machine? Also, after moving are you absolutely sure that it is level side to side and front to back? Next, make sure you have adequate water flow and not losing water down the drain, from a lose dump valve.

@Carl, always start with a clean ice machine. I’m talking a thorough scrubbing with nickel safe cleaner and a soft nylon brush inside all the cavities on the evaporator, where the ice forms. It’s a painstaking job, but it will and can fix the problem you are describing. If you are confident that it is clean, an intermittent bin switch could also be the cause. The only way to test these is to OHM them out and look for consistency.

If you let me know your model numbers I’ll help you identify parts and further diagnosis.

machine was full about one day later it still was not on opened bin door half full turned off/on one blink then one blink exceeded 6o min/three times i have adjusted thickness three times drops 3/4 times then full cubes again any suggestions

We moved our Manitowoc ice machine a few feet and now it’s not making ice. We turned off and on and it will make one tray of ice but then the red wrench light goes on. What is the problem? Thank you!!
Sincerely, Maryanne

@Alice, what did the service technician do to ‘repair’ your ice machine? The problem you discuss could be caused by being dirty and a thorough cleaning may be required. I’m assuming that it is going into harvest too soon, then attempts to harvest ice that isn’t there, causing it to lock out after 3 consecutive cycles.

Also, those machines have a 3 yr parts and labor warranty on them. If you suspect a failed part, I would get a trained technician that is authorized to perform Manitowoc warranty work. However, please note, if it’s because the ice thickness control is dirty or has scale all over it, this is not covered.

We have a Q130
We turn it on, it will make about 2 trays of ice then it shuts itself off.
We had a technician look at it, he left as it was making ice. We got a 1/2 bag
and it quit. Now if we turn it on it just runs. Starts to make ice in refrigeration mode,
water stops and it just runs and gets hot.

All this since we took apart cleaned and sterilized.
We have had this for about 2yrs, this is the first trouble we have had.

Any ideas?

@MikeW you should not soak your probes in acid and yes, the probe can sense through the white plastic or even laying on something. I would recommend replacement.

The part number is a 7601603 and can be found at the link below. Newer probes for under counter models are going to be gray plastic.

http://icemakerpartsshop.com/products/7601603-manitowoc-ice-thickness-control

Q130 is getting the red harvest light as soon as it starts it cycle. Cleaned but still same issue. Unplug the thickness probe from board and it’s good but red light comes on as soon as you plug in even with probe off to side. Replaced wire thinking short but noticed that I can be touching the white plastic from the probe -no metal and when I touch metal with other hand light goes off. Thought minerals were allowing continuity so I soaked in muratic acid but it still does it. Is the board failing reading to sensitive? Is the thickness probe bad and is conductive across the plastic? Either way thanks for the advice and would be great to include part number of your recommendation.

@Lee, what is the model number of your ice machine? Also, you need to follow the sequence of operations for your model. So, after starting up ice machine, what energizes? Is the machine shutting down? Are you getting a safety limit? Is it failing in freeze or harvest?

Compresser has severe ice on it and is only making 1/3 squares

@Todd, I would recommend replacing the entire valve. There are no individual parts available for the float.

@Chow, could you describe what the evaporator looks like? If you have copper showing through, then your evaporator needs replacement. If it still has a nickel look to it, then a thorough cleaning may not be enough. If you are positive you have cleaned the evaporator and scrubbed it(using a soft nylon brush with nickel safe cleaner), then it may be time to look into a refrigeration issue.

I have a Q210 that is not producing ice. After cleaning it, I noted that the float valve (Part no. 8369049) does not work properly. I disassembled, cleaned and reassembled, including the plunger/cotter pin assembly. It works freely when I hold it down in a bucket of water, but when I install the unit, turn on the water pressure and fill the bin, the plunger does not work. If I manually raise the float, it stays up, but if I manually press it down, it stays submerged. I am wondering if I need a new float valve, or just the plunger? Thanks.

SY0605W , water cool. I clean the evaporator a few time already, Change the water filter and it seem that the ice still not dropping off the evaporator at the first time, I have to shut the unit off, and put it back on before the ice will drop off the evaporator at the 2nd time. or else the unit will shut off after a few attempt making ice. what could I do to make the ice come off the evaporator at the first attempt?

@Jason, you shouldn’t be dumping water during the freeze cycle. There is a flush before the cycle starts, but not during. If there is water going out your dump valve during a cycle, check the voltage, if you are not getting voltage but still losing water, clean the dump valve or replace. It’s possible a piece of trash came through the line and is holding it open.

If you are constantly getting voltage no matter what, sounds like a control board issue. Hopefully shorting out didn’t cause more issues.

@witness, did you clean the condenser as well, besides just replacing the air filter? HPCO is high pressure cut out, which is caused by the unit running too hot and shutting down so that it does not damage the compressor. Typically this is caused by a dirty air filter and condenser.

Manitowoc ice machine condenser fan motor not running ,fan motor very hot,condenser filter was very dirty,unit keeps on displaying HPCO Active

I have a Manitowoc Ice machine, model# SD1802A. Up until yesterday (7/12/14), it was making ice normally, harvesting properly, and so forth. I come into work (I’m a maintenance man for a restaurant), and they told me the ice machine was not working. The fuse on the panel was popped, so I replaced it with the same kind that came out of it. As soon as I plugged the machine back in, in instantly got a loud “POP” and it tripped the breaker, but never blew the fuse again. I did it one more time, just to make sure it was not a fluke. I did it a second time. I called Manitowoc Tech Support, and he suggested I check the Dump Solenoid. I pulled it out and there was a good bit of “shock marks” on the top like it had been shorting out. I replaced it, and when I plugged it in, and the machine kicks on, the compressor kicks on, and everything runs like normal, except for the fact that when the pump kicks on to route water to run over the cube tray, it’s almost like water isn’t getting pumped in fast enough into the tray and it all gets sucked up before it can start freezing. I also see the dump solenoid pumping water out. I’m assuming that could be where I am losing some water.

Does this make any sense to you?

@Tom, sounds like an ice thickness control, as this is the only component on the machine that will put the ice maker into harvest. To test, I recommend unplugging the IT probe directly from the board, not just disconnecting it from it’s mount, and turning the machine on. The machine should just continually freeze, if it does, turn the machine off and replace the ice thickness control.

Use part number 7601603:

http://icemakerpartsshop.com/products/7601603-manitowoc-ice-thickness-control

I have a Q130 Manitowoc ice machine. Recently it comes on- water starts pumping over ice tray, and -immediately the cycle changes to when ice should drop and then the machine shuts off all within one minute. It is like the machine goes through the complete ice making process without making any ice.I kept the machine in the off position overnite, and tried it angain. I made a bin full of ice. When I went back to it later, it was not working and the same problem occurred. I stopped and started it twice, First it shut off and the second time it continued to make ice. Is there something that might be triggering this cycling? Thanks

@Tony, glad you found what the problem was. We keep plenty of the 000009122 water inlet valves in stock if you wish to order from us.

@Tracy, having an ice machine that shits itself is never good. :P With this little information it’s hard to tell what the immediate problem is, typically when a machine shuts down like this it’s kicking off because of high head pressure. Your machine is unique because the compressor and condenser are on the roof, away from the maker itself.

Could you tell me what safety limit, if any, the ice machine is giving you? This would be displayed on the control board with a flashing light.

Just a follow up on my initial post. I reviewed the electrical schematics and tested the individual components, first the water level probe then the water inlet valve. The water level LED on control board reacted correctly when the water reservoir was full and empty. I used a multimeter connected to the water inlet valve and 208V was present corresponding to the water level LED. The issue was the water inlet valve. The unit used the older Invensys S53 valve. I will be ordering a new 000009122 kit to replace it.

I have an IB1024YC that will start to make ice but then the condenser pumps down and shits off.

@Tony

The easiest way to see if it’s the water level probe is to unplug the probe directly from the control board. Then turn the machine on, the machine should continually fill without a signal from the probe. If the water fills continually, then replace the probe.

If you still have water issues after unplugging the probe, then I recommend confirming you have voltage to your water inlet valve. In addition, you can take apart the valve to check to see if any debris is blocking the valve. Lastly, ensure you have proper water pressure to the machine, no blocked filter or something.

Hi there,
I saw your great comments and help and thought I would ask about the problem I am having with my SY0604A unit. The unit does not not fill the water tray. Is there a easy method to check to see if the water level probe , the water valve or something else that is causing the problem? The unit seems to make ice and harvest correctly when I manually fill the water tray.

Thanks
Tony