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Error code reference

Samsung Air Conditioner Error Code 163

Indoor unit remote controller option input is wrong or not entered (EEPROM option error).

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Indoor unit remote controller option input is wrong or not entered (EEPROM option error).

First step from the service manual

Re-enter remote controller option code for the correct model.

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

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What 163 means on a Samsung air conditioner

Error code 163 on a Samsung air conditioner indicates an EEPROM option error related to the indoor unit's remote controller configuration. The EEPROM (Electrically Erasable Programmable Read-Only Memory) chip on the indoor unit's main PCB stores critical configuration data, including the option code that tells the unit which model-specific settings and parameters to use. When this option code is absent, corrupted, or mismatched for the installed unit, the system cannot properly initialize its operating parameters and throws error 163.

This error most commonly surfaces after a main PCB replacement, a power surge, or an incomplete initial setup procedure. The indoor unit's control board relies on a correctly entered remote controller option code to identify the system's capacity, refrigerant type, and feature set. If the EEPROM loses its stored data or receives an incorrect code during programming, the unit will refuse to operate normally and flag the mismatch as error 163.

The primary corrective action is to re-enter the correct remote controller option code for the specific indoor unit model. This requires accessing the service or installer settings through the remote controller and inputting the code that corresponds to the unit's model number. If the option code is entered correctly and the error persists, the EEPROM chip or the indoor unit PCB itself may be faulty and require replacement.

Source: manufacturer service documentation.

Common causes of 163

  1. 01

    Option code never entered after PCB replacement

    Wiring / connection

    When the indoor unit's main PCB is replaced, the new board ships without a pre-programmed option code. If the technician does not enter the correct code for the specific model, error 163 will appear immediately.

  2. 02

    EEPROM data corrupted by power surge

    Wiring / connection

    A voltage spike or power interruption can corrupt the data stored in the EEPROM, erasing or scrambling the option code. This can cause error 163 even on a unit that was previously working correctly.

  3. 03

    Incorrect option code entered for model

    Wiring / connection

    If the wrong option code was entered during setup or after a board swap, the unit will detect a mismatch between the stored code and its expected configuration and trigger this error.

  4. 04

    Faulty EEPROM chip

    Part replacement

    If the EEPROM chip itself has failed, it cannot reliably store or retrieve the option code regardless of how many times the code is entered. Repeated error 163 after correct code entry points to this possibility.

  5. 05

    Defective indoor unit PCB

    Part replacement

    A broader failure of the indoor unit's main control board can prevent proper EEPROM communication, making it impossible to save or read the option code. Board replacement would be required in this case.

See the test procedure for each cause

Frequently asked questions about 163

What does 163 mean on a Samsung air conditioner?
Error 163 indicates an EEPROM option error on the indoor unit, meaning the remote controller option code is either missing, incorrect, or corrupted. The EEPROM chip stores model-specific configuration data that the unit needs to operate. Without a valid option code, the unit will not run normally. The fix typically involves re-entering the correct option code through the remote controller's service settings.
How do I fix error code 163 on my Samsung air conditioner?
The first step is to re-enter the remote controller option code that corresponds to your specific indoor unit model. This is done through the installer or service mode on the remote controller. If you do not have the correct option code for your model, a Samsung-certified technician can look it up and program it. If the error returns after correct code entry, the PCB or EEPROM chip may need to be replaced.
Will resetting my Samsung air conditioner clear error 163?
A simple power reset will not clear error 163 because the underlying issue is a missing or corrupted configuration code stored in the EEPROM. Cycling power does not reprogram the memory chip. The error will return every time the unit powers on until the correct option code is entered through the remote controller service procedure.
Is error 163 on a Samsung air conditioner a safety concern?
Error 163 is a configuration error rather than a safety-critical fault, so it does not indicate a dangerous condition such as a refrigerant leak or electrical hazard. However, the unit will not operate correctly until the error is resolved, which means you will not have functional cooling or heating. It is best to address the error promptly to avoid discomfort, but there is no immediate risk to the equipment or occupants.
How much does it cost to repair error 163 on a Samsung air conditioner?
If the fix is simply re-entering the option code, you may only pay for a service call, which typically ranges from $75 to $150 depending on your location and the technician. If the EEPROM chip or the indoor unit's main PCB needs to be replaced, costs can rise significantly, typically ranging from $200 to $600 or more depending on parts and labor. Getting a diagnosis from a certified technician before authorizing any part replacement is recommended.

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