Lennox MPB012S4S

102
23. Troubleshooting Outdoor Unit Error Codes
Error Code: E0
Description: OutdoorEEPROMmalfunction.
General Note: PCBmainchipdoesnotreceivefeedbackfromEEPROMchip.EEPROM:aread-onlymemorywhosecontentscanbe
erasedandreprogrammedusingapulsedvoltage.ForthelocationofEEPROMchip,pleaserefertothephoto.
OutdoorEEPROMmalfunction
Poweroff,thenrestarttheunit3minutes
later.
Yes
Doestheproblemstillexist?
Yes
ReplacetheoutdoormainPCB.