Question about Hoshizaki Commercial Freezer KM-500MAH

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Trying to locate componants for the 3 beeps

Km500maf wheres the float switch,inletwater valve located/ is there a schematic please

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Float switch at front of module to the left of the water pump white plastic with black rubber push on seal
inlet valve at top middle of machine inside small metal holder screwed to top of machine

Posted on Sep 18, 2008

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2 Answers

My hoshizaki ice machine KM-900mrf model beeps 3 times and stop making ice. After reset it starts, but stats beeping again after an hour.


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.

Jul 04, 2015 | Hoshizaki Freezer Commercial Ice Machines...

1 Answer

What happens when the float switch is bad?


Hello;
My name is Peter. I am a retired field service refrigeration, appliance technician.

I think you have put your question in the wrong section this section is fro freezers. Freezers do not have a float switch.

So, lets assume you have a dishwasher. There are several reasons you keep filling with water:

1.) You may have a float that is restricted with soap film. This is a white bulb on the bottom of your unit. Remove the top and clean.

2.) At the top of your float is a contact switch. This switch activates you water discharge pump. This component is about $12.00 USD.


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You can check this with a Ohm meter set to the lowest Ohms. Hold the switch button in and you should get a reading of '0' Ohms.

The above is just for your information. It is not your problem.

1.) Bad Water Supply Valve - Often the water supply valve becomes worn and blocked from age. When this happens you do not get the 65 PSI water pressure to close the water supply solenoid valve. Within your control system your float signals the valve to close. In your case it does not close.

Ok, lets check out your water supply shut off valve. With a bucket under the water supply valve, turn the valve off and disconnect the hose. If water comes out, then the supply vale is plugged and does not provide enough pressure to close the water supply solenoid valve on your unit. You have a bad water supply valve.

Ok, the water shuts off. Lets look at your unit water supply solenoid valve. The spool in the valve often becomes stuck with age.

With a hair drier gently warm the valve (NOT HOT) and gently tap the valve to try and loosen the spool.

This sometimes works. In the end you are going to have to replace the valve.

This is a pretty easy repair. The valve is about $35.00 USD. If I were to make a service call at your home, I would have to charge you $350.00 USD.

Send me your model number. It is located either on the face of your dish washer after you open the door or on top of the door.
Call me and I will walk you through this @ 443-306-1362.

I will be expecting a Christmas Card in return.

Glen Burnie, MD USA


Feb 28, 2015 | Freezers

1 Answer

I have a Hoshizaki model Km-250baf it beeps three times.


3 beeps means it has been in the freeze cycle too long. A stuck float switch can cause this as well as a leaking water valve. Look for that first. Let me know if you need more info.

Feb 06, 2011 | Hoshizaki Freezer Commercial Ice Machines...

2 Answers

Hoshizaki ice machine beep 3 times, what is it stand for?


in the freeze cycle too long. Most common is the water valve leaking through. Second thing to check is for a stuck float switch.

Oct 18, 2010 | Hoshizaki Freezer Commercial Ice Machines...

1 Answer

It beeps 3 times then pauses then beeps 3 times then pauses. Keeps this pattern


Unit was in the freeze cycle for 60 minutes and the freeze back up timer took over the process. In most all cases, either a stuck float switch or a leaking water valve.
Hope this helps.

Sep 25, 2009 | Hoshizaki Freezer Commercial Ice Machines...

1 Answer

Beeping 3 times every 3 seconds


The 3 beeps indicates that the unit was in the freeze cycle for 60 minutes. Causes: 1.) Water valve leaking, allowing water to continually enter the system. 2.) Float switch stuck, sending false signal to board. This indicates ice not being produced. 3,.) Low freon level causing long freeze cycle. 4.) Hot gas valve leaking thru causing warmer than normal evap plates=low production. 5.) Expansion Valve not feeding freon properly to evap plates.
Items 1 and 2 are the most common. Number 3 possible due to freon leak in the system. Number 4 and 5 are usually a very rare occurance.
Hope this helps ya.

Sep 05, 2009 | Hoshizaki Freezer Commercial Ice Machines...

1 Answer

Beeps 3 times when turned on


3 beeps means the machine has ran two 1 hour cycles back to back to make ice an average timeframe for ice making is 25-30 min. Could be several issues, float switch dirty, water valve leaking by, dirty spray tubes, dirty evap., then go to refrigeration Expansion valve, compressor, charge, Hot gas valve leaking by,,,,,

Jun 23, 2009 | Hoshizaki Freezer Commercial Ice Machines...

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.

Jan 02, 2009 | Freezers

1 Answer

Hoshizaki ice machine model no. KM500MAF


go to their web site. lots of good info. too much to get what you need here. lots to concider when installing. self contained? remote condenser? location of unit. and lots more. tech support 1-800-233-1940 may shed some light too

Jul 02, 2008 | Hoshizaki Commercial Freezer KM-500MAH

3 Answers

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.

Feb 27, 2008 | Hoshizaki Commercial Freezer KM-500MAH

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