The error code L 1 when swiping the pos machine is nonstandard and cannot be queried. It may be caused by the network. You can try restarting it. If not, you can contact the installer to handle it.
Credit card transaction failure refers to the phenomenon that cardholders can't pay normally when they use credit cards for simple credit card consumption payment. Reasons for failure of credit card transaction:
1, frequent use of credit card transactions in a short period of time: Many people may not deliberately restrain themselves when using credit cards. You may spend money frequently in 1 hour, or spend more than five times a day (excluding online consumption). This kind of consumption is too frequent, which belongs to abnormal consumption and easily leads to the failure of credit card transactions.
2. There is something wrong with the 2.POS machine: another reason for the failure of credit card swiping transaction is that the line of the swiping machine is busy, or there is something wrong with the swiping machine itself, which leads to the abnormal transmission of transaction information.
3. Insufficient credit card balance: In fact, many times, the failure of credit card transactions is mostly due to insufficient credit card balance. There is not enough balance in the card to pay for the object you bought. The transaction will naturally fail.
4. Exceeding the trading time of merchants.
5. Trading merchants are on the bank blacklist.