OKI C5510MFP Error Codes list and solutions – Compatible Printer model: OKI C5510MFP – OKI C5510MFP Error Code description: Code: -01 Display: Loader V. xx.xx PW-LSI ERROR Description: A high-voltage power unit interface error at initialization. Causes: Is the cable between the PU board and the high-voltage power unit connected properly? Is there poor contact? […]