Braking Resistor Overheat
Yaskawa · P1000 AC Drive
What does rH mean?
The external braking resistor connected to the drive has overheated. This indicates excessive energy dissipation, potentially due to frequent or heavy braking, or inadequate resistor sizing/cooling.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Inspect the external braking resistor for physical damage, discoloration, and proper mounting.
- 2
Verify all wiring connections to the braking resistor and the drive's braking terminals (B1, B2) are secure and free of corrosion.
- 3
Measure the actual resistance of the braking resistor and compare it against the specified value and power rating (Ohms and Watts) as per system design or Yaskawa documentation.
- 4
Check for adequate airflow and cooling around the braking resistor; remove any obstructions or debris impeding heat dissipation.
- 5
Verify drive parameters related to deceleration time (e.g., C1-03, C1-04) and braking resistor usage (e.g., L3-01 to L3-08) are correctly configured for the application and match the system design.