If you are referring to the ice not clearing the evaporator plates, usually the defrost cycle is too short. Check that by watching the machine and when it goes into the harvest mode, see if all the ice comes off. If not, lengthen the cycle.
if your are referring to a harvest cycle not clearing the plates, there may not be enough heat to clear the plates or the defrost cycle is too short. Usually the first thing to check. start there my friend.
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.
(Quated From Hoshizaki Technical Bulletin) An alarm code of 3 beeps every 3 seconds means that the control board has shut down on the 60 minute freeze cycle back up timer.
The “E” control board has a 60 minute timer that starts at the beginning of the freeze cycle. If the float switch fails to open and start the next harvest within 60 minutes, the board will automatically start the harvest cycle. If this occurs in two consecutive cycles, the control board will shut the unit down on the manual reset, freeze cycle back- up timer. The yellow fault LED marked “60 min.” will illuminate. This safety is designed to help prevent a freeze up of the evaporator.
Once you have identified the 60 minute alarm, there are several things to check. Reset the alarm by depressing the white reset button to the right of the fault LED’s. This must be done with the power “ON”. Now check the float switch to see if it is stuck in the up position. A stuck float can occur if scale is present on the reed switch shaft inside the housing. To check it, drain the water reservoir, unplug the black float switch connector (K5) from the control board and check it with an ohm meter for a closed switch (zero ohms). If the float switch is sticking, clean it with ice machine cleaner or replace it as necessary. An inlet water valve which is slowly leaking by during the freeze cycle can cause a 60 minute alarm. If the inlet water valve is stuck wide open, it is unlikely that any ice will form on the evaporator. Check for a slow leak by allowing the unit to cycle into the freeze cycle and disconnecting the hose at the outlet of the water valve. If water leaks by during the freeze cycle, the water valve diaphragm is likely damaged or the small diaphragm bleed port is clogged with scale. Clean the bleed port or replace the diaphragm or entire water valve as necessary.
(I Recommend to get a refrigeration tech for this part).
Another possibility is a refrigeration system problem. You should use normal refrigeration diagnosis procedures to check for one of these problems. If the thermostatic expansion valve is not feeding properly or the refrigerant charge is low, the evaporator will not form ice as it should and a long freeze cycle will occur. This could also be the result of the hot gas valve not closing completely during the freeze cycle or if the compressor valves are weak or inefficient. An inefficient compressor however, will usually show up first on the KM model through a longer than normal harvest cycle. This is because of cooler than normal discharge gas. Use proper refrigeration practices to repair a refrigeration system problem. While these are not the only reasons for a 60 minute freeze cycle, they are the most common and should be checked to resolve a 3 beep/yellow fault LED alarm.
Most likely(50% of the times) Your Ice machine need a real cleaning. not just run clean cycle with ice machine cleaner. every 6 month call HVAC-R guys - machine will last half time longer if u schedule proper maintenance with them. I have seen It all: people try to call "friend", or someone who "knows" how this machines work. Real clean would take up to 3 hours for people who know what they doing. Here is one of my videos, when 3 beeps - long freeze cycle is not common and all others would offer You to get a new Ice Machine. Bill to the owner was 950$, New Machine 3450$ plus labour to install 600$.
KM says this is an ice maker. Reset button is on the control board. Board is in compartment on the right side where the power switch is located. Remove 2 screws and remove cover by sliding forward. Watch for wires, do this carefully. On the board, up at the top, is a small, white button. With power on, push the button.
Something is holding your Ice Slab at the bottom from your description. Some causes are 1 Dirty - scaled up evap, or just dirty w muddy covering, 2 the vacuum breaking holes are stopped up If it is making a sla whith the evaporator warm no ice take a flashlight and hold it where its shining to the back of the evap and look for the light on th cube forming slots next to the ones your shining the light into Upper corners of each hole must be open. 3 The slab is freezing uneve most like cause is a stopped up distributor tube at the top thats feeding the water down the evaporator. 4 On some models thay had a closer fitting water curtian (the cover in front of the slab) and the top of the sheet touched this and caused the slab to stay uprite and continue the "slide" forward.If your curtian is of the older style and has metal hooks on it with verticle slots n the curtian look at the slots and see if the slots are worn making the whole curtian slide down ward I have seen this several times.4B On some older models there is also a plactic coated wire diverter on the bottom infront of the evaporator. If the palstic coating is gone or the bottom or is not even, the slab could hang up there. 4C If you have the newer plastic pins make sure thay are seated in the mounting properly. 5 Nickel plating could be comming off (any copper color on the lower 1/3 of the evaporator?). 6 I have seen some of the horizontal plates them selves be loose and not in flush try pushing and pulling on them especially the ones at the bottom. ANy that are loose and comming out is your problem. This lengthy extrapolation is by no means all of the possibilities but most of the common ones. If this helps you solve your proble please rate me accordingly. If it leads you to the correct and completed repair WOULDNT WE MAKE A TEAM?? And Good luck to you.
really sounds like the board needs replacing. after 1 minute, if the float is doing it's job, the compressor is to come on provided the water level is correct and the float is doing what it was designed to do.
