The internal memory failed to save or read parameters properly.
Measure the resistance of the coils. A healthy coil should match Rexroth's factory specifications (usually a few ohms). A reading of means a short; an infinite reading means an open circuit. 3. Check Signal Wiring
The feedback sensor signal (position, pressure, or angle) is lost. rexroth ppcr221 fault codes full
Ensure the valve spool is not sticking due to hydraulic oil contamination.
Most fault codes on the PPCR221 require a specific action to clear: The internal memory failed to save or read
The unit uses an onboard LED. You must count the sequence of flashes (e.g., two flashes, a pause, then three flashes indicates code 23).
To help you resolve the exact issue on your machine, tell me: A reading of means a short; an infinite
The feedback sensor is reporting a value outside the expected physical window. ⚡ Group 3: Solenoid and Output Errors