INVT DBU-055-2

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4.2 Standard wiring diagram .............................................................................................. 27

4.2.1 380V 7.5kW-75kW .............................................................................................. 27

4.2.2 380V 90kW-220Kw/660V 55kW-250kW/1140V 55kW-160kW ........................... 28

5 Operations ........................................................................................................................... 29

5.1 Operation panel description ......................................................................................... 29

5.1.1 Panel diagram ..................................................................................................... 29

5.1.2 Key function description ...................................................................................... 29

5.1.3 Indicator description ............................................................................................ 30

5.2 Function parameter list ................................................................................................ 31

5.3 Function description .................................................................................................... 34

6 Troubleshooting ................................................................................................................. 36

7 Maintenance ........................................................................................................................ 38

7.1 Routine maintenance ................................................................................................... 38

7.2 Periodic maintenance .................................................................................................. 38

7.3 Wearing part replacement ........................................................................................... 39

INVT DBU-055-2 - Page 3