Face VSD8 error in Nirvana 75KW air compressor. Rotor does not seem to rotate. No voltage, amps, rpm.

Changed control board, interface board, output module, stator & rotor but still problem persists.

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> Changed control board, interface board, output module, stator & rotor but still problem persists.

Have you changed the hall-sensors? VSD 8 error is "Encoder Loss".

 

>> Changed control board, interface board, output module, stator & rotor but still problem persists. <<

> Have you changed the hall-sensors? VSD 8 error is "Encoder Loss". <

The problem was occurring for a new hall effect sensor received from vendor. Replaced a spare (slightly damaged) hall effect sensor and observed the rotor to run for a few seconds but trips with VSD 7. Is there any procedure to check the hall effect sensor working condition without the special kits.