Lennox MWMB012S4-*L - Page 140

140
Error Code: F4
Description: OutdoorEEPROMerror.
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belowphotos.
OutdoorEEPROMmalfunction
Poweroff,thenrestarttheunit3minutes
later.
Yes
Doestheproblemstillexist?
Outdoor PCB(M3OC-30HRFN1-M)
Yes
ReplacetheoutdoormainPCB.