danfoss vlt5000 won't run reverse forum

If your Danfoss VLT 5000 is not running in reverse,

check parameter 400 (Direction) to ensure it is not locked to "Forward only" (set to 0), and verify that terminal 19 (or the configured reversing terminal) is receiving a 24V signal. Additionally, check for alarm 60 (external signal missing) or parameter 200/201 which may limit speed to forward

Key Troubleshooting Steps:

• Parameter Settings:
  • Parameter 400 (Direction): Set to 0 (Forward), 1 (Reverse), or 2 (Both). Change to 2 to allow both directions.
  • Parameter 200/201: Ensure there is no speed limit preventing reverse rotation.
• Wiring/Control Signals:
  • Verify that +24V is connected to terminal 12 (or 13) and bridged to terminal 19 (reverse) via a switch.
  • Check for alarm 60, which indicates a missing or invalid control signal, often causing "auto remote coast".
• Keypad Check:
  • If running in "Hand" mode, you may need to use the + or - keys to reverse the direction, or change the direction via parameter settings if in "Auto" mode