Refrigeration Component Diagnostics - Manitowoc UDE065A Technician's Handbook

REFRIGERATION COMPONENT DIAGNOSTICS

All electrical and water related problems must be
corrected before these charts will work properly. These
tables must be used with charts, checklists and other
references to eliminate refrigeration components not listed
and external items and problems that will cause good
refrigeration components to appear defective.
The tables list four different defects that may affect the ice
machine's operation.
NOTE: A low-on-charge ice machine and a starving
expansion valve have very similar characteristics and are
listed under the same column.
Procedure
Complete each item individually in the
Step 1
"Operational Analysis" column.
Enter check marks () in the boxes.
Each time the actual findings of an item in the
"Operational Analysis" column matches the published
findings on the table, enter a check mark.
Example: Freeze cycle suction pressure is determined to be
low. Enter a check mark in the "low" box.
Perform the procedures and check all information listed.
Each item in this column has supporting reference
material.
While analyzing each item separately, you may find an
"external problem" causing a good refrigerant component
to appear bad. Cprrect prpbleIs ts they tre fpuad.
f
the pperttipatl prpbleI is fpuad, it is apt aecesstry
tp cpIplete the reItiaiag prpcedures.
Add the check marks listed under each of the
Step 2
four columns. Note the column number with the highest
total and proceed to "Final Analysis."
NOTE: If two columns have matching high numbers, a
procedure was not performed properly and/or supporting
material was not analyzed correctly.
124 Part Number 000014797 Rev02 05/18