S966 Display Error Codes & Problems

Rectangular display with a color-backlit screen and a separate button pad. Sold for 24V, 36V and 48V conversion kits.

The seller's spec sheet shows an "ERROR" label on the screen above the speed digits, but it doesn't include an error code table.
Settings: hold + and - together for 3 seconds to open them. + and - change a value, and M saves it and moves to the next setting. The seller notes that settings can differ between versions.

Which code list does my display use?

Look at how the code appears on your screen:

E plus two digits (like E07): the S866 list.
A plain number from 1 to 13 next to an "Error" label: the SW900 list.
A number followed by "info" (like 03 info): the KT-LCD3 / LCD4 list.
A number from 21 to 30 on a King-Meter or KD display: the King-Meter / KD list.
A two-digit number on a Bafang system: it depends on the display, because Bafang's lists differ. Check the label on the back: DPC-18, C961, C965, 850C, E162 / E163.
Flashing lights instead of a number: Bafang E170 / E180 / E181.

Still not sure? Look up your code number to see what it means on every display we cover.