Errors 00 through Error 04 check upper PCA memory locations, RAM memory locations and
EEPROM check sum during the power up test sequence. If a fault is found during the power up
test sequence, the appropriate error code will be displayed.
These errors messages almost always indicate an upper PCA problem when they are
consistently displayed. Failures causing these error messages to be displayed are rare.
If the error message is consistently displayed when the unit is powered up, the upper PCA should be replaced. It is possible to see one of these messages displayed intermittently due to external causes. If the units A.C. input significantly dips during the power up test sequence the test could fail resulting in one of these messages being displayed. Treadmills operating on non-dedicated A.C. circuits may see these messages displayed on an intermittent basis.