Danfoss VLT HVAC Drive Instruction Manual

Also see for VLT HVAC: Instructions Operating instructions Design guide Instruction Operating instructions

Operation Keys for local control are found atthe bottom of the control panel.130BP046.10[Hand On]enables control of the adjustable frequency drive via the GLCP. [Hand on] also starts the motorand makes it possible to enter the motor speed data by using the arrow keys. The key can beselected asEnable [1] orDisable [0] via par.0-40 [Hand on] key on LCP.The following control signals will still be active when [Hand on] is activated:• [Hand on] - [Off] - [Auto on]• Reset• Coasting stop inverse• Reversing• Set-up select lsb - Set-up select msb• Stop command from serial communication• Quick stop• DC brakeNOTEExternal stop signals activated by using control signals or serial bus will override a“start” command via the LCP.[Off]stops the connected motor. The key can be selected asEnable [1] orDisable [0] via par.0-41[Off] key on LCP. If no external stop function is selected, and the [Off] key is inactive, the motorcan only be stopped by disconnecting the line power supply.[Auto On]enables the adjustable frequency drive to be controlled via the control terminals and/or serialcommunication. When a start signal is applied to the control terminals and/or the bus, the ad-justable frequency drive will start. The key can be selected asEnable [1] orDisable [0] via par.0-42 [Auto on] key on LCP.NOTEAn active HAND-OFF-AUTO signal via the digital inputs has higher priority than thecontrol keys [Hand on] – [Auto on].[Reset]is used for resetting the adjustable frequency drive after an alarm (trip). It can be selected asEnable [1] orDisable [0] via par. 0-43Reset Keys on LCP.5. How to operate the adjustable frequencydrive VLT® HVAC Drive Instruction Manual54 MG.11.A4.22 - VLT® is a registered Danfoss trademark5