Mains contactor wiring error

What does F2835 mean?

A wiring error has been detected in the circuit connecting the mains contactor to the drive. This could include incorrect connections for the contactor coil, auxiliary contacts, or power lines. Improper wiring can lead to the contactor failing to engage, disengage, or provide correct status feedback, affecting safe power-up and operation.

• Incorrect wiring scheme for the mains contactor
• Loose or improperly terminated wires at the contactor or drive
• Missing or incorrectly jumpered auxiliary contacts
• Damaged wiring or terminals in the contactor circuit
• External control logic issue for the contactor

Click steps to track your progress.

1. 1

   Inspect all wiring connections between the mains contactor and the Bosch Rexroth IndraDrive MPx02, specifically checking for loose terminals, incorrect wire routing, or damage on the contactor coil, auxiliary contacts, and power line connections according to the provided electrical schematics.

2. 2

   Measure the control voltage at the mains contactor coil terminals when the drive attempts to engage, confirming it matches the contactor's nominal coil voltage. Simultaneously, verify the continuity and state change of the contactor's auxiliary feedback contacts at the IndraDrive input terminals when the contactor engages.

3. 3

   Check the Bosch Rexroth IndraDrive MPx02 parameters related to mains contactor control and supervision (e.g., drive enable, auxiliary contact input configuration, monitoring functions) against the machine's configuration documentation to ensure correct setup.