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  • Introduction
    • Safety
      • Authorized staff
        • Residual risks
          • Safety references
            • General safety references
          • Required tools
            • Dismounting the old frequency inverter (FI)
              • Unscrewing the cover of the frequency inverter
                • Checking whether the phases L1, L2, L3 and the terminal strip X102 are de-energised
                  • Disconnect and remove the cables at the power and control connections
                    • Remove the 2 screwed cable glands 2 (M20)
                      • Unscrewing the frequency inverter from the compressor
                        • Remove the connector of the motor cable from the rear side of the FI
                          • Remove the 4 fixing bolts from the compressor
                            • Open the compressor terminal box
                              • Loosen the screwed cable gland (M20-M25) on the terminal box
                                • Unscrew all motor cables and the protective earth conductor in the terminal box
                                  • Interim result - compressor without frequency inverter
                                  • Mounting the new frequency inverter (FI)
                                    • Open the new frequency inverter
                                      • Unscrew the protective earth conductor from the cover of the FI
                                        • Mount the cable bushings
                                          • Apply the heat transfer paste
                                            • Screw the new frequency inverter to the compressor
                                              • Remove the sealing plug (M20-M25) from the cable bushing for the motor cable
                                                • Route all motor cables through the protective metal hose and screw it down to the FI
                                                  • Mount the motor cables and the protective earth conductor to the terminal plate
                                                    • Close the compressor terminal box
                                                      • Connect the power connections and the protective earth conductor to the FI
                                                        • VARISPEED compressor without control board for the use in ECOSTAR condensing units: connecting the control lines
                                                          • VARISPEED compressor with control board: screw metal rail and control board to the FI and connect the control lines
                                                            • Mount the protective earth conductor to the cover of the FI
                                                              • Close and tighten the FI cover
                                                                • Final result
                                                                • Document as PDF