1788

Category: Alarm

Cause

Condition: main circuit voltage exceeds the specified voltage.

1. Main circuit input voltage exceeds the rated permitted voltage.
2. Incorrect power input (incorrect supply system).
3. Drive hardware fault.
4. Incorrect regenerative resistor selection or no external regenerative resistor connected.

Corrective action

1. Use a voltmeter to check whether the main circuit input voltage is within the rated permitted range (see Appendix A specifications). If it exceeds the setting, use the correct voltage source or connect a voltage regulator in series. Use a voltmeter to check whether the supply system matches the specifications; if not, use the correct voltage source or connect a transformer in series.
2. If the error persists while a voltmeter confirms that main circuit input voltage is within the rated permitted range, return the unit to the dealer or original manufacturer for inspection and repair.
3. Verify the regenerative resistor connection, recalculate its resistance, and correctly reset parameters P1.052 and P1.053. Reset the alarm.