« Last post by SHELTAR on Today at 12:55:47 PM »
The DCE33's use a circulation pump to spray water up on evaporator plate. There is a cold control that monitors the temperature of the evaporator. The cold control swaps contacts when it gets cold enough. "Cold enough" means that there is ice in the evaporator mold. When the cold control (called cube size thermostat) swaps contacts it energizes a hot gas valve that sucks hot refrigerant from condenser directly through the evaporator mold. This is what makes the ice drop from the mold.
On any "no ice production" complaint, I always always always begin by feeling the hot gas valve. I'm specifically feeling for an oily like substance which would be refrigerant. If I feel that, then I know that the hot gas valve has developed a leak.
Pro Tip number 1: scotsman DCE33's are very prone to sealed system leaks. Usually at the hot gas valve but I have seen leaks in the heat exchanger inside the armaflex.
If no oil on the hot gas valve, then check the circ pump operation by folding up the water curtain in that little rectangular window where the spray nozzles are.
Pro Tip number 2: those curtains are ripped easily and can fold back up over the spray nozzles blocking water movement.
Pro Tip number 3: dirty condenser coils cause refrigerant temperature to be higher than normal thus prolonging the time it takes to satisfy the cube size thermostat. In this scenario, by the time the cube size satisfies, the previous dump of ice has already melted down the drain. This appears as a no ice complain but is actually a "not making enough ice" complaint.