| Response Code | Description | Action |
|---|---|---|
| 00 | Approved | Successful transactions. |
| 01 | Invalid Request Message | Please check: -Message format -LRC -Function Code. |
| 02 | Invalid Field Data | Please check field data value and format. |
| 51 | Transaction Declined by Host | Please refer to host response code list from the acquirer. |
| TO | Timeout waiting host authorization response | Terminal able to connect however was not able to get the response within the expected time. If happens constantly, please check with bank. |
| E1 | Unable to read card (contactless, contact or swipe) | Please check card. |
| E2 | Terminal is not ready for transaction | Please inject Key. |
| E3 | Terminal encounter connection error | Please check terminal connection such as: phone line, ethernet cable, sim card or wifi access. |
| E4 | Invalid / Unsupported card | Please check the card used for transaction. |
| E6 | Terminal is busy | Terminal is not in idle state. |
| XX | Error encountered | Other errors encountered. |