I changed the water float switch and water valve. It has harvesting problem. If I hit the float switch it stats harvest cycle. If I don't hit on time it goes to 3 times beeping and I need to reset it start the machine and it harvest itself. Please let me know how to fix it. thanks
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Hoshizaki makes quality ice. Other machines make just ice, quicker.
Have a look at the side of the evaporator; there is a probe (thermistor) attached to it that tells the control board when to initiate the harvest cycle. make sure it's clean and attached properly and doesn't need replacing. If hitting the float switch initiates the harvest cycle it sounds like you have a blocked/ scaled water tube or switch housing. take off the bottom of the switch assembly (black rubber bit) and clean through to the water chamber. run a cycle of descaler before trying again.
Testimonial: "The cleaning of black rubber bit did not help and I have replaced water float switch. I don't see the thermistor is bad. Still I may be replace it, If it works. If you have more suggestions, please advise. Thanks for your advice, Ajaib"
Might be a time to wash that machine.
SOURCE: Hoshizaki Ice Machine Model KM-500MAF
(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.
SOURCE: Beeping Ice Machine
I have a Hoshizaki KM-250BAF that is making 3 beeps then pauses and them makes 3 beeps again. If I unplug the ice maker and plug it in it continues to make the 3 beeps. The manual does not mention anything about beeps. Can anyone help?
SOURCE: Hoshizaki KM1800SAH Long Harvest cycle
i ewould check to see if the dump valvre or the fll valve were leaking thru for starters and also check to see 9if the head master was working properly. thanks for using FixIt and Merry Christmas
SOURCE: Hoshizaki ice machine with constant beeping every 3 seconds
I believe if you remove the thermostat wires and put them together and retry it you'll be making Ice, then get you a new thermostat. Please rate me accordingly and good luck.
SOURCE: Hoshizaki IM-240DME no harvest time.
are you sure this is a Hoshi and not a Cold Draft? Your model number in not in any of my manuals and the Hoshi tech site has no listing for such a machine.
Double check it.
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Stuck inlet water valve constantly let's water in,. When u hit float u may be just making it go In Harvest such as you could do that anytime and it would go in harvest. How bad are distribution tubes?? Really dirty ice machine wouldn't take long to make float get stick already even if new. Condenser clean? Cond fan capacitor weak making fan over heat and shut off? Does back of machine have clearance to move proper air through coil of condenser? Inlet water valve leaking by Luke warm water will never freeze. Hitting float prolly just allows switch to send unit into harvest. Also is hoses going to float clear?
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