7114-NHR-147 ebmpapst perfect fit for ABB inverter Installation steps: Prepare for power failure: switch off and discharge the ACS800 power supply to ensure safe operation. Remove the old fan: Remove the fixing screws and power connector of the original fan and take it out gently. Fit check: check whether the mounting holes, size (usually 172×150×55mm) and voltage (24V DC) of 71...