What does ERROR1, ERROR2, ERROR3, and ERROR4 mean?

Kindly send the device for repair if the error message starts with 'bad'.
// 10->bad0 Flash configuration area damaged.
// 10->bad1 Flash valid card area damaged.
// 10->bad2 Flash swipe card area damaged.
// 10->bad3 SRAM damaged.
// 10->bad4 Bad sector record area damage 
// 10->bad5 flash erase fail (EF)
// 10->bad6 Flash Fail
// 10->bad7 Flash Fail
// 10->err0 Cannot save invalid card. 
// 10->err1 Re-swipe of card within a limited time prohibited
// 10->err2 Card number contains non-numeric character under compression mode.
// 10->err3 Cannot overwrite, memory full
// 10->err4 Memory buffer 100% full

Software Initialization

HTA-810/820 does not support harware initialization. Restore factory settings is made thru HS8000 software. Make sure the connection between the device and the software is established. Clear all valid cards and data transactions(Please refer to user manual Chapter 3) before the initialization (Please refer to user manual Chapter 12).