Danfoss VLT FC 103 Instruction Manual page 35

Start-up and Functional Tes...
Min. and max. frequency set-up
Figure 3.7
Min. time between two starts
Figure 3.8
Choose with/without bypass valve
Figure 3.9
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VLT Refrigeration Drive Instruction Manual
Select open-loop or closed-loop
Figure 3.10
NOTE!
Internal/Closed-loop: The FC 103 will control the
application directly using the internal PID control within
the adjustable frequency drive and needs an input from an
external input such as a temperature or other sensor which
is wired directly into the adjustable frequency drive and
controls from the sensor signal.
External/Open-loop: The FC 103 takes its control signal
from another controller (such as a pack controller) which
gives the adjustable frequency drive, e.g., 0–10 V, 4–20 mA
or FC 103 Lon. The adjustable frequency drive will change
its speed depending upon this reference signal.
Select sensor type
Figure 3.11
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MG16J122 - VLT is a registered Danfoss trademark
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