Cause : Short-circuit of braking circuit comes when the braking module is abnormal. This is a critical fault, and it’s essential to address it promptly to avoid damage to the drive or the braking resistor.

"Err62" fault in inovance MD290 drive indicate "Short-circuit of braking circuit". This means there is a short circuit detected in the braking circuit.

Here’s a step-by-step guide to troubleshoot and resolve this issue:

1. Power Down Safely

• Ensure Safety: Before beginning any troubleshooting, make sure to power down the system safely. Disconnect the drive from the main power supply to avoid any electrical hazards.

2. Inspect Braking Resistor

• Visual Inspection: Check the braking resistor for any visible signs of damage, such as burn marks, discoloration, or broken connections.
• Resistance Measurement: Use a multimeter to measure the resistance of the braking resistor. Compare the measured value with the resistor’s rated value. A significantly lower resistance indicates a short circuit within the resistor.
• Wiring Check: Inspect the wiring connections between the braking resistor and the drive. Look for any signs of short circuits, such as exposed wires or damaged insulation.

3. Examine Braking Circuit Components

• Internal Components: If possible, check the internal components of the drive associated with the braking circuit, such as transistors or diodes, for any signs of failure.
• Control Circuit: Inspect the control circuit that governs the braking function. Faults in the control circuit can sometimes cause erroneous short-circuit detection.

4. Test Braking IGBT

• Insulated Gate Bipolar Transistor (IGBT): The braking IGBT in the drive is responsible for controlling the braking circuit. If this component is shorted, it can cause the Err62 fault.
• Testing: Test the IGBT using a multimeter to check for any short circuits between the collector and emitter terminals. A shorted IGBT will need to be replaced.

5. Check for Ground Faults

• Grounding Issues: Inspect the drive and the braking circuit for any possible grounding issues. A ground fault can sometimes manifest as a short circuit in the braking circuit.
• Isolation: Ensure that the braking resistor is properly isolated from the ground and that there are no unintended connections to the chassis or other grounded components.

6. Reset the Fault

• After Repairs: Once you have identified and repaired the fault, reset the drive’s fault condition.
• Monitor Operation: Power up the drive and monitor the braking circuit operation closely to ensure that the fault does not reoccur.

7. Test Under Load

• Braking Test: Run the drive under normal operating conditions and perform a braking operation to test if the braking circuit functions correctly without triggering the Err62 fault.