How to remove the limit of credit card amount of UnionPay POS machine?

Special reminder: In the following circumstances, the card can no longer be swiped and will be restricted, which is a restricted business card printing.

Case 1: reducing credit cards

For example, if you spend 20,000 yuan, the balance is insufficient. If you spend 1000 yuan, the balance is still insufficient. Finally, if you swipe 5,000 yuan, the transaction is successful, which is a credit card with a reduced amount.

Scenario 2: Query Balance

Generally, your own credit card or savings card certainly knows the balance. If you really want to check the balance, you can only check it through other channels, and you can't use POS machines, such as online banking, mobile banking and telephone inquiry.

Situation 3: Always enter the wrong password.

Extended data:

About POS machines:

① Scan and read the barcode information of commodities with a scanner.

At this time, the name, quantity and price of the goods for sale can be seen on the cashier screen, and the price of the goods can also be displayed on the customer display screen.

(2) Other commodities can repeat the above operations. When there is only one similar commodity, it can be scanned directly.

(3) In the process of collection, you can press the Subtotal button to display the subtotal amount of the goods at any time.

(4) When the final sales amount is confirmed, you can press the Total button to settle the collection.

Reference: Baidu Encyclopedia -POS machine