Usually this means that the EMV keys must be updated. Follow these steps.
VX520 Chip Malfunction FIX
From the Softpay menu, (Sale, Refund, Void)
FIRST BATCH OUT THE MACHINE BEFORE PROCEEDING
- Press the green key
- press F2 -Setup
- Type in password, 1, alpha, alpha, 6,6,8,3,1
- press the green key
- on the setup menu now
- press the far left purple key 5 times
- you will see EMV Key Update
- press F3 for EMV key update
- Press F1, yes to continue
- it will process the update and tell you it is successful
- it will also beep 2 times
- Then press the RED X key twice to get back to the main menu