Danfoss VLT Programming Manual page 237

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VLT HVAC Drive Programming Guide
The bypass will switch the motor to operation direct on line. The external bypass is activated by means of one of the digital outputs or relays in the
frequency converter, when programmed in parameter group 5-3* or parameter group 5-4*.
NB!
Important! After enabling the Drive Bypass Function, the frequency converter is no longer Safety Certified (for using the Safe Stop in
versions, where included).
To deactivate the Drive Bypass at normal operation (Fire Mode not activated), one of following actions must be carried out:
• Press the Off button on the LCP, (or program two of the digital inputs for Hand On-Off-Auto).
• Activate External Interlock via digital input
• Carry out a Power Cycling.
NB!
The Drive Bypass cannot be deactivated if in Fire Mode. It can be deactivated only by either removing the Fire Mode command signal
or the power supply to the frequency converter!
When the Drive Bypass function is activated, the display on the LCP will show the status message Drive Bypass. This message has a higher priority than
the Fire Mode status messages. When the automatic Drive Bypass function is enabled, it will cut in the external bypass according to the below sequence:
Status can be read in the Extended Status Word 2, bit number 24.
MG.11.C9.02 - VLT ® is a registered Danfoss trademark
3 Parameter Description
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