Service Manual

190 Part Number: 000015430 Rev 02 5/20
System Contamination Clean-Up
General
This section describes the basic requirements for restoring
contaminated systems to reliable service.
Notice
Manitowoc Ice assumes no responsibility for the use of
contaminated refrigerant. Damage resulting from the
use of contaminated refrigerant is the sole responsibility
of the servicing company.
DETERMINING SEVERITY OF CONTAMINATION
System contamination is generally caused by either
moisture or residue from compressor burnout entering the
refrigeration system.
Inspection of the refrigerant usually provides the first
indication of system contamination. Obvious moisture or
an acrid odor in the refrigerant indicates contamination.
If harmful levels of contamination are suspected, perform
the following procedure.
1. Remove the refrigerant charge from the ice machine.
2. Remove the compressor from the system.
3. Check the odor and appearance of the oil.
4. Inspect open suction and discharge lines at the
compressor for burnout deposits.
5. If no signs of contamination are present, perform
an acid oil test to determine the type of cleanup
required.