Quick Set-Up - Danfoss VLT CDS302 Operating Instructions Manual

Quick Set-up

4 Quick Set-up
The following describes the basic procedure for running
the frequency converter.
CAUTION
When the connections are made, the compressor starts
automatically.
1. Connect the power supply to the terminals (L1,
L2 and L3) of the frequency converter as shown
in 3.3.4 Mains connection for B4, C1 and C3.
2. Connect motor cable between the frequency
converter (U, V & W) and Compressor (Clockwise
on terminal), see 3.3.5 Motor Compressor
Connection. (The connectors utilised in these first
2 steps are provided in the accessory bag which
accompanies the frequency converter).
3. Press [Quick Menu] and go to quick setup. Ensure
that the correct compressor model is selected in
1-13 Compressor Selection.
4. Make connections between the terminals 12 and
18 (start signal), connections between terminal 12
and 27 (inverse coast signal) and terminals 12
and 37* (safe stop inverse signal).
*See 3.3.10 Basic Wiring Example and 2.2.1 Terminal 37 Safe
Stop Function.
CAUTION
If detecting an error that causes the frequency converter to
trip, it automatically tries to restart the compressor after 30
s (unless the error is severe and causes a trip lock). See
also 14-20 Reset Mode and 14-21 Automatic Restart Time.
Open Loop with external reference:
1. Apply analogue speed reference signal (0-10 V)
on terminal 53 using the terminal 55 as common.
See 3.3.14 Basic Examples of Control Connections.
2. Check if switch A53 is positioned to U (voltage)
instead of I (current). The switch A53 is located
on the frequency converter and is visible when
the LCP is removed.
3. Ready to Run: If the frequency converter is
supplied with display: Press [Hand On] to set a
local speed reference in the display (good for
testing purposes). Press [Auto On] for running in
operation and with an external reference.
MG34M302 - VLT
®
Operating Instructions VLT CDS302 and CDS303
This is what the screen will look like after configuring the
frequency converter for Speed Open loop application, Hand
On mode.
Illustration 4.1
This is what the screen will look like after configuring the
frequency converter for Speed Open loop application, Auto
On mode:
Illustration 4.2
4.
PID closed loop with 4-20 mA pressure transmitter:
1.
2.
3.
®
is a registered Danfoss trademark/Commercial Compressor
Done.
Connect pressure transmitter to analogue input
on terminal 54 according to 3.3.14 Basic Examples
of Control Connections.
Make sure that the switch for analogue input 54
is set to "I" for current input.
Press [Quick Menu], go to "PID Closed Loop" and
then to "Basic PID Settings) menu.
Now change parameters to
1-00 Configuration Mode: Select [3] Process
3-01 Reference/Feedback Unit: Select [71] Bar
4 4
37