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Error code reference

Samsung Air Conditioner Error Code E199

No pipe check operation performed after installation through auto addressing mode.

Samsung codesSamsung air conditioner codes

No pipe check operation performed after installation through auto addressing mode.

First step from the service manual

Perform pipe check operation by pressing K1 button on outdoor display PCB.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What E199 means on a Samsung air conditioner

Error code E199 on a Samsung air conditioner indicates that a pipe check operation was not performed following installation via auto addressing mode. Auto addressing mode is the process by which the outdoor unit communicates with and assigns addresses to connected indoor units in a multi-split or VRF system. The pipe check operation is a mandatory commissioning step that verifies refrigerant piping connections are correctly matched between the outdoor unit and each indoor unit. Without this verification step, the system cannot confirm that refrigerant is routed properly, which is a critical safety and performance requirement.

The pipe check procedure is initiated using the K1 button located on the outdoor unit's display PCB. This function runs a controlled sequence that tests refrigerant flow through each branch of the piping network, allowing the system to map which indoor units are connected to which refrigerant lines. The E199 code appears as a reminder or interlock that prevents normal operation until this commissioning step has been completed. It is not an indication of a hardware failure, but rather a procedural flag built into the system's startup logic.

This error most commonly occurs after a new installation or after system reconfiguration where auto addressing was run but the technician did not proceed to complete the pipe check before attempting to operate the system. It can also appear after a control board replacement or firmware reset that clears commissioning data, requiring the full setup sequence to be repeated. The system will not operate normally until the pipe check is successfully completed.

Source: manufacturer service documentation.

Common causes of E199

  1. 01

    Pipe check not performed after auto addressing

    Wiring / connection

    The most likely cause is that the installer completed auto addressing but did not proceed to run the pipe check operation using the K1 button on the outdoor display PCB. This is a required commissioning step and must be completed before the system enters normal operation.

  2. 02

    System reconfiguration without re-commissioning

    Wiring / connection

    If indoor units were added, removed, or rearranged after the original installation, auto addressing may have been re-run without following through with the pipe check step. Any change to the system topology requires the full commissioning sequence to be repeated.

  3. 03

    Outdoor display PCB replacement or firmware reset

    Wiring / connection

    Replacing the outdoor unit control or display PCB, or performing a factory reset, can clear stored commissioning data. This forces the system to require the pipe check to be performed again before recognizing the installation as complete.

  4. 04

    Power interruption during commissioning

    Wiring / connection

    A power loss that occurs during the auto addressing or pipe check sequence can leave the commissioning process incomplete. The system may register that auto addressing was run but that the pipe check was never successfully finished.

See the test procedure for each cause

Frequently asked questions about E199

What does E199 mean on a Samsung air conditioner?
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.
How do I fix the E199 error on my Samsung air conditioner?
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.
Is it safe to run my Samsung air conditioner with the E199 error showing?
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.
Will resetting my Samsung air conditioner clear the E199 error?
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.
How much does it cost to fix a Samsung air conditioner E199 error?
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.

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