NICE5000 User Manual 8 Troubleshooting
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Fault Err41 is not recorded in the elevator stop state.
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Fault Err42 is reset automatically when the door lock circuit is shorted or 1s after the fault
occurs in the door zone.
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If faults Err51, Err52, and Err57 persist, they are recorded once every one hour.
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Except the fault code and level, the number (such as 1, 101) indicates the fault subcode.