new 60 Series Service Manual.rev. 06.01.16.docx - 17 –
Evaporator Temperature Probe: Senses the temperature of the evaporator. During the defrost
cycle, the evaporator must warm sufficiently to release the ice. This probe signals the controller to
terminate the defrost cycle, after the ice has fallen out of the evaporator, and start the next ice
making cycle.
Note: A secondary function of this probe is to signal the controller to shut off the ice
machine if the evaporator should overheat.
Adjustment: Turn the adjustment knob on the controller warmer (CCW Top blue Knob), only if the
defrost time is insufficient to drop all the ice from the evaporator, before the water plate begins to
close. The defrost time should be increased no more than is required to ensure all the ice has
fallen from the evaporator.
Control Stream: This is a small clear box, divided into two sections and located on the front face
of the water plate. It is a “safety valve” that ensures evacuation of the water reservoir so that
harvest cycles will begin without undue delay. Water flowing into the left section of the box is
returned to the water tank and re-circulated through the system. Water flowing into the right
section of the box is drained out of the system. The velocity of the stream flowing in the box,
during the ice making cycle, is an indicator of the water pressure inside the water plate. This
pressure will increase as the ice cubes fill out in the evaporator, covering the drain holes provided
for each cell. This pressure increase will cause the stream, normally flowing into the left section of
the box, to flow over the partition and into the right section, draining the system of excess water.
Adjustment: Turn the Philips head screw located behind the expansion valve such that the stream
of water falls to the left of the control stream box partition, during the early portion of the ice
making cycle, before the cubes are full.
Water Level Probe Assembly: This assembly consists of three stainless steel probes which are
positioned in a clear water level tube. The water level tube is mounted in front of the water tank
and is connected to it by a hose. The water level in the tank is visible in the tube. The water level
probes are positioned in the water level tube. The longest is a reference probe and the tip of this
probe is at the bottom of the tube. The next longest probe is the “LOW PROBE.” When the water
level is low enough to separate from the tip of this probe, the controller is signaled to start the
harvest cycle. The shortest probe is the “HIGH PROBE.” When the water level touches the tip of
this probe during the water fill, the controller will de-energize the water inlet valve.
Adjustment: The reference probe should be adjusted all the way down. The “Low Probe” should
be adjusted so the tip is approximately .60” (15 mm) from the bottom of the probe tube. The “High
Probe” determines how much water is taken into the system at the beginning of a cycle. It is
adjusted as required by the size of the cube (“C” or “HK”) and the desired fullness (dimple size) of
each cube. Typically all cubes should have a small dimple at the end of the freeze cycle. Lack of
a dimple in the cubes is an indicator that the water tank level is too high at the start of the cycle.
Note: Making cubes without a dimple will reduce ice machine capacity and may damage
the water plate surface in extreme cases. If the control stream is draining water for more
than 15 seconds, at the end of the ice making cycle, the water level in the tank is too high.
Lower the high probe or raise the low probe slightly, until proper operation is evident.
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