Q: What causes the “Start Voltage Low Error”? The battery status look’s ok in the menu.
A: The minimum voltage is a better indicator for battery status. There is no mathematical relationship with Average Voltage. Minimum Voltage can be very low, while average is OK.
Problems like this can occur when Vmin is lower than 2.5 Volts.
T: Also, perform a hardware check. Check the Data Logger internal power circuit. Remove /replace the red and black power cable and white connectors on the cable an pin connectors on the main and power board for oxidation or worn-out. Possibly, replace the red and black power cable. Remove and reinstall the battery, check battery and holder contacts for oxidation.