TECH - SPEC'S Technician's Pocket Guide - Hoshizaki America, Inc.

4. Melt away of back of cube
a) This can occur if the evaporator plate is scaled up.
De-scaling is required.
b) Insufficient water flow during harvest can also cause
the flat side of the cube to melt away. Check for a
plugged inlet water valve screen, plugged external
filter, low water pressure, or a small water line size.
EITHER OR BOTH OF THESE ITEMS CAN CAUSE
THIS SYMPTOM.
5. Small cube
(Size will depend on how much water is
in the reservoir.)
a) Can be caused by a low volume of water at the beginning
of freeze. Check for adequate water flow during
harvest. See item 4 b)
b) If the pump out check valve is stuck open or has a
weak spring, the water left in the reservoir will be
pumped out during the first five minutes of freeze.
This results in a short cycle and slivers of ice or small
cubes.
c) Any loss of water, whether by leak, water trail, or
loose stand pipe can cause this problem.
6. Freeze ups can be caused by 2, 3, or 4 above in any
combination. The major cause however is a dirty
(scaled up ) water system or evaporator. A thorough
cleaning will eliminate most freeze ups. The second
most common reason for freeze up is low water flow.
Always check the evaporator, and water flow first,
then go to other checks when diagnosing freeze ups.
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