A: No active fault. The drive is healthy. If the motor won't run, check your enable signal (terminal X4.2).
| Fault Code | Description | Common Cause | Immediate Action | | :--- | :--- | :--- | :--- | | | Output Overcurrent (Instantaneous) | Short circuit in motor cables; defective motor winding. | Disconnect power. Megger test motor insulation. | | F102 | Ground Fault | Phase-to-ground short inside motor or cable. | Check all cable glands and terminals for moisture or chafing. | | F103 | Overload (I²t) | Mechanical jam; extended stall condition. | Manually rotate driven load. Check gearbox bearings. | | F110 | Dynamic Braking Overload | Regenerative power exceeds braking resistor capacity. | Increase deceleration time; check resistor for open circuit. | | F112 | Short Circuit on Output Phase U | Power transistor (IGBT) failure in U-leg. | Replace PPCR221 power module. Do not reset without repair. |
Introduction The Bosch Rexroth PPCR221 is a high-performance industrial control unit, often found managing hydraulic drives, injection molding machines, press controls, and complex automated production lines. Known for its robustness and precision, like any sophisticated electronic component, the PPCR221 can encounter operational faults. When a yellow or red warning light illuminates, or the system fails to engage, a fault code is generated. rexroth ppcr221 fault codes full
| Fault Code | Description | Common Cause | Immediate Action | | :--- | :--- | :--- | :--- | | | Encoder Communication Error (EnDat) | Broken shield; faulty ribbon cable; noise interference. | Reseat encoder connector X8. Check for 5V supply between pins. | | F503 | Hall Sensor Invalid State | Three hall sensors giving an impossible pattern (e.g., 111 or 000). | Inspect hall sensor PCB inside motor. Replace if magnetized debris present. | | F510 | Resolver Mismatch | Motor feedback and drive resolver settings differ. | Compare P-0-0114 (Resolver poles) with actual motor. | | F512 | Speed Deviation Too High | Commanded speed vs. actual speed difference > threshold. | Mechanical binding; encoder coupling slipped. |
| Fault Code | Description | Risk Level | Suggested Action | | :--- | :--- | :--- | :--- | | | Heatsink Temperature High (>85°C) | Medium – drive may derate | Clean cooling fan filter; check ambient temperature. | | A220 | Lifetime Warning – DC Bus Capacitors | High – plan replacement | Internal electrolytic capacitors drying out. Schedule drive replacement within 6 months. | | B001 | Parameter Checksum Error | Medium – parameters corrupted | Restore from backup file (.PRM or .PAR). | | B005 | Firmware Incompatibility | Critical | The power section firmware does not match control firmware. Contact Rexroth support. | A: No active fault
| Fault Code | Description | Common Cause | Immediate Action | | :--- | :--- | :--- | :--- | | | Fieldbus Timeout (Watchdog) | PLC/controller stopped sending cyclic data. | Check PLC scan time; increase watchdog timeout in parameter P-0-0360. | | F702 | Profibus Configuration Mismatch | GSD file ID mismatch between master and slave. | Re-import the Rexroth GSDML file into your engineering software. | | F710 | EtherCAT State Machine Error | Slave failed to transition from Pre-Op to Safe-Op. | Cycle power to the PPCR221. Check EtherCAT cable integrity. | | F720 | Modbus RTU CRC Error | Corrupted bytes; baud rate mismatch. | Verify parity, stop bits, and baud rate (default is 19.2k, 8, N, 1). |
| Scenario | Repair Possible? | Recommended Action | | :--- | :--- | :--- | | Single blown IGBT (F112, F113) | Yes – by certified Rexroth service center | Ship for repair. Cost ~$1,200–$1,800. | | PCB trace damage from moisture | Rare – often unrepairable | Replace. Corrosion spreads. | | Firmware corruption (B005) | Yes – firmware can be re-flashed | Request firmware file from Bosch support (requires serial number). | | Multiple random fault codes (F301, F501, A101 together) | No – main processor failure | Immediate replacement. | | Fault Code | Description | Common Cause
Keep your hydraulics moving and your production lines running. No fault is unfixable with the right code list and a logical approach.