Specifications

SED2 VFD Startup, Operation, and Maintenance Manual
60 Siemens Building Technologies, Inc.
DANGER:
Wait for 5 minutes. Always wait 5 minutes after
disconnecting the SED2 from the power source before
performing any work. The DC link capacitors of all SED2s
remain charged with dangerous voltages for 5 minutes
after all supplies have been disconnected. When working
on open equipment, note that live parts are exposed. Do
not touch these parts.
Swap wires on the motor terminals (U, V) or on the output
terminals of the motor overload relay. Tighten the terminal
lugs, reapply power, and recheck the direction of motor
rotation.
( ) 5. With correct motor rotation, manually run the SED2
throughout its entire operating range while observing
operation.
If the SED2 trips on over-current during acceleration,
increase the acceleration time rate via parameter P1120.
If the SED2 trips on over-voltage during deceleration,
adjust the deceleration time rate via parameter P1121.
If excessive vibration of the driven load is noted at specific
frequencies, use Skip Frequency parameters P1091
through P1094 to eliminate this vibration.
( ) 6. Determine whether the remote speed reference is a 0 to
10 Vdc or a 4 to 20 mA signal. Connect or verify
connection of signal wires. Set or verify that analog input
DIP switch has been set to the appropriate setting as
instructed in the Analog Input DIP Switches section of this
manual.
( ) 7. Check the signal for proper polarity. Observe if the remote
speed command can achieve the minimum and maximum
speeds desired. If not, scale as required. The signal value
can be read at r0752 and the scaled value can be read at
r0754.
( ) 8. Make additional SED2 application parameter settings as
required and record them in Appendix A: Parameters,
Defaults, and Settings.
( ) 9.
Press
to place SED2 in Auto mode.
This completes the startup procedure for the SED2.