Km 500 kae hoshizaki 3 beeps every 4 second compressor not coming on
I hear 3 beeps ,every 4 seconds . i cleaned the filter , switched to cleaning mode to run through cycle. and did not turn beeping off . i reset the botton and now the compressor does not come on . the condensor has a little dust but not to make it work. i dont have a repair book on it
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Re: km 500 kae hoshizaki 3 beeps every 4 second...
Put an amp probe on common wire at compressor and see what amps are when it tries to start. 40 to 60 is mechancially locked up compressor. kill power and test start and run capacitors. there is an thermal temp over load on the compressor that opens when comp gets hot from trying to start. gently remove and look for cracks or burned looking. . i saw one this week doing exact same and i have ordered the oem compressor start cap realy and run cap and drier and will put in all new gas. be sure to allow sufficient time when switched to ice for it to get to ref cycle, it may take 5 minutes starting with water purge, then fill, etc. good luck, call hoshizaki dist they are usually pretty helpful if you need a auth service rep in you area. i think they are three years warrantied!
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Hoshizaki machines must have a very clean evaporater other wise the ice will bind causing a slow harvest. This may be from lime scale build up. "Lime A Way" is recommended for this proper cleaning. After that is done check to see that the water inlet valve screen is clean and that you have a filter installed. Last check the thermister attached to the suction line. http://www.hoshizakiamerica.com/techtips/Pdf/All/tips105.pdf
I am assuming that it has run two consecutive cycles. I would first clean the machine inside and out. it should drop ice once cleaned, if not then open up the control box and find out which lights are flashing. I am almost certain that once it is cleaned it will drop ice.
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.
turn it off and on and check the drain line and see if its draining water. some times the check valve needs taken apart and cleaned. the problems corespond to water related problems. usually because its taking too long to freeze. good luck
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$.
(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.