Samsung Air Conditioner Error Code E199

E199 indicates that the pipe check operation was not performed after the system was set up using auto addressing mode. Auto addressing assigns communication identifiers to indoor units, but the pipe check is a separate required step that verifies refrigerant piping is correctly connected. The error is a commissioning flag, not a hardware fault. It is cleared by pressing the K1 button on the outdoor display PCB to initiate and complete the pipe check.

The system is designed to prevent normal operation while E199 is active, as the pipe check ensures refrigerant routing is correct before the system runs. Attempting to bypass or ignore this step could result in improper refrigerant distribution, reduced performance, or potential equipment damage. The system should not be operated until the pipe check is completed by a qualified technician.

Because E199 is a commissioning issue rather than a parts failure, the cost is typically limited to a service call fee for a qualified HVAC technician to perform the pipe check procedure. This generally falls in the range of $75 to $200 depending on your location and the service provider. If the error was caused by a control board failure that wiped commissioning data, parts costs would be additional and vary by model.

To resolve E199, a qualified technician needs to press the K1 button on the outdoor unit's display PCB to start the pipe check operation. This procedure runs a test of the refrigerant piping connections between the outdoor and indoor units. The error will clear once the pipe check completes successfully. This is not a DIY repair, as it requires access to the outdoor unit control board and knowledge of the commissioning sequence.

A simple power reset will not clear the E199 error because the code is triggered by an incomplete commissioning process, not a temporary fault. The system will continue to display E199 until the pipe check operation is physically initiated and completed using the K1 button on the outdoor display PCB. Resetting power without completing the pipe check will not resolve the issue.