Fault Code 4266
Fault Code 4266
Return pump fault
Diagnostic conditions
- Return pump voltage and motor relay voltage actual values are evaluated and display implausible values
- Open circuit in electric circuit
Possible cause of fault
- Return pump motor locked up/runs too easily
- Wire/plug connection faulty
- PSM hydraulic unit faulty
Affected terminals
PSM 5.7: Terminal 1
PSM 5.3: Terminals 7, 20
Diagnosis/troubleshooting PSM 5.7
Work Instruction 1 - 2:
Diagnosis/troubleshooting PSM 5.3
Work Instruction 1 - 6:
Work Instruction 7 - 8:
