1789

Category: Alarm

Cause

Conditions:

1. Main circuit voltage is below the specified voltage. The abnormality type defaults to Warning; to change it to Alarm, set P2.066 [Bit 9] to 1.
2. DC Bus voltage is less than P4.024× √2. Causes:
3. Main circuit input voltage is below the rated permitted voltage.
4. No main circuit input voltage.
5. Incorrect power input (incorrect supply system).

Corrective action

1. Reconfirm the voltage wiring and check whether the main circuit input voltage wiring is normal.
2. Reconfirm the power switch and use a voltmeter to check whether the main circuit voltage is normal.
3. Use a voltmeter to check whether the supply system matches the specifications and whether the correct voltage source or a series-connected transformer is used. Clear AL003 according to the P2.066 [Bit 2] setting:
4. If P2.066 [Bit 2] is set to 0, clear the alarm through DI.ARST after voltage recovers.
5. If P2.066 [Bit 2] is set to 1, the alarm clears automatically after voltage recovers.