Primary Color
MAGENTA
Equivalent Colors
Bright Reds having Lavender to Violet separations on the Indicator segment.
Indication
Evidence of high moisture or high moisture containing some depleted acids.
Cause
Inadequate dehydration or:
Moisture has been driven out of dryer due to elevated liquid line temperature.
Remedy
Change dryers and recheck after 80-100 operating hours. Correct the problem that has
caused abnormal liquid line temperature.
Special Notes
A "False Positive" is possible from connection of Checkmate unit to a wet
service port. Dry service port and Checkmate assembly - Retest the equipment.
Liquid line moisture indicators will not confirm or forewarn of this condition because the
Oil passing by the sight glass indicator is diluted with liquid Refrigerant.
Primary Color
VIOLET
Equivalent Colors
Dominant Violet with Strong Red separating on the Indicator.
Dominant Violet with soft Blue separating on the Indicator.
Indication
Products of acid activity dissolved in the Oil phase.
Cause
System operating at higher than normal operating temperatures.
A system condition that has progressed due to inadequate dehydration.
Numerous other known and unknown sources can lead to this condition.
Remedy
Most systems can recover by installing new dryers. However, an Oil change may be
necessary.
Retest after 80-100 operating hours.
Special Notes
Cross-Contamination can give a "False Positive" Violet. This is most often, but
not necessarily, the level at which a pH test kit may indicate acidity. Retest the system.
Primary Color
BLUE
Equivalent Colors
Blue with a Violet separation, Navy Blue, Blue-Gray with small carbon deposits.
Indication
A reservoir of acid/acidic products dissolved in the Oil Phase.
Cause
Prolonged exposure to high contaminant levels. Extreme heat. Numerous other circumstances.
Remedy
Change Oil and add new dryers to salvage remaining Compressor life.
Special Notes
Compressor Oil viscosity and lubricity has diminished.
A Blue level may also occur from Oil super saturated with liquid water.
