•
Vane stroke is too large. Remove the sensitivity jumper in the Micro Computer Control Center,
or program a lower sensitivity on the OptiView Control Center. Also, check the vane motor
to see that the fullest possible stroke is being used. Moving the vane motor arm pivot point
closer to center, and extending the degrees of travel by adjusting the internal end stops, will
reduce the amount of vane action for the same period of operation.
•
Verify that the condenser is clean.
•
Verify that the liquid level control is working properly, and maintaining a refrigerant level in
the condenser.
•
Ensure that the condenser water temperature is proper for the load on the chiller. In many
cases, the condenser water temperature is still at 85°F.
Failure to reduce speed may also be due to the system having been placed in Manual Speed when
in VSD Service Mode.
Do I have a problem with my coolant? The pink color is no longer visible?
The coolant normally has a pink or rose color when new. After several months of operation, this
color may dissipate, and the coolant may appear almost colorless. The lack of the color in the
coolant does not necessarily indicate a problem. Most colorless samples test above 1000 PPM
nitrite, which is normal. There is no need to flush the system unless you find the coolant becoming
opaque or cloudy. In this case we suggest you obtain a sample for analysis, then flush the system
with coolant and install fresh coolant. The coolant must be changed every year regardless of color
or test results. The coolant is required to be changed every year.
Liquid-Cooled OptiSpeed Compressor Speed Drive
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