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First, 3 beeps means that the unit was in the freeze cycle too long and the 60 minutes back up timer kicked in and took over.
Now, for the water flow/ head pressure water cooled control.
You set the water flow for what ever it takes to achieve a head (High Side) pressure of 270 psi. the gallons per minute are of no matter. It's the pressure that you want to achieve and maintain.
If you fix the head pressure problem, the beeps should go away.
If you don't have a gage set, then measure the temp of the exiting water from the condenser. It should be in the 104 to 115 degree range. Any lower or higher, and the unit will not run like it was designed to do.
Hope this knocks it out for you.
It means the compartment temperatures are increased then allowed limit.Generally in some appliances the maximum temperature is indicated at the display with an alarm after the electric cutoff.If the temp is high in the compartments
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.
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$.
The click your hearing is a thermal cutout that is kinda like a little breaker, it gets to the temp that it is designed for and trips. If its making a high pitch noise, more than likely the compressor itself has gone out and needs to be replaced, its getting a high load and triping the thermal cutout.