Cornelius I Series Wartungshandbuch PDF herunterladen (Seite 54)

51 TD 204

Readings in the range listed below 100 Meg–Ohm would be an indi-

cator that the system being tested may have a contamination prob-

lem. Where does the problem come from? As an example, the filter

drier may become saturated and hold large percentages of moisture

and the system function without a problem until such time as the

product operating conditions change. Should the room temperature

increase, or the condenser plug–up etc., the higher operating pres-

sures and temperatures may cause the drier filter to release a portion

of it’s held moisture. It is also imperative to avoid opening the sealed

refrigeration system whenever possible and when it is done to be

certain the true problem is correctly diagnosed and repaired. Re-

member, service gauge sets should only be installed after all external

checks have been performed.

Caution: Megger checks should NEVER be performed

on any compressor that is under a vacuum.

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Cornelius I Series Wartungshandbuch Seite 54