This fault is in the area of memory in which the adjustable parameters are stored, and will inhibit the machine operation. If the defect persists when the key is cycled OFF/ON, ensure that the EEPROM chip (located on the logic board) is fully seated. If you have a controller that has a flashable EEPROM, then the EEPROM chip is soldered in place, and the the logic board must be replaced.
If the alarm does not reappear after key cycle, be aware that the parameters stored previously have been erased and replaced by the default values.