mypros+
Error code reference

Samsung Air Conditioner Error Code OUTDOOR_YELLOW_GREEN_FLICKER_RED_FLICKER

DC-Link voltage sensor error

Samsung codesSamsung air conditioner codes

DC-Link voltage sensor error

First step from the service manual

Replace outdoor control board

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

MyPros+ Max

Get the full diagnostic procedure for OUTDOOR_YELLOW_GREEN_FLICKER_RED_FLICKER.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What OUTDOOR_YELLOW_GREEN_FLICKER_RED_FLICKER means on a Samsung air conditioner

The OUTDOOR_YELLOW_GREEN_FLICKER_RED_FLICKER error code on a Samsung air conditioner indicates a DC-Link voltage sensor error within the outdoor unit. The DC-Link is a critical section of the inverter drive circuit that maintains a stable DC bus voltage after rectifying the incoming AC supply. This DC bus voltage powers the compressor's variable-speed inverter module, and the control board continuously monitors it through a dedicated voltage sensing circuit. When the sensed voltage falls outside expected parameters or the sensor signal itself is absent or erratic, the outdoor control board flags this error and halts compressor operation to prevent damage.

The DC-Link voltage sensor is integrated into the outdoor control board's power electronics section. A fault here can stem from a failed sensing circuit on the board itself, degraded filter capacitors on the DC bus that cause excessive voltage ripple, or a breakdown in the signal pathway between the sensor and the main processor. Because the sensor and its associated circuitry are part of the outdoor control board assembly, isolating the sensor independently from the board is generally not practical in the field.

The primary recommended diagnostic action is replacement of the outdoor control board. Before condemning the board, technicians should verify that the incoming supply voltage is within the unit's specified range and that no upstream wiring faults are contributing to abnormal DC bus behavior. If the supply voltage is confirmed good and the error persists, the outdoor control board is the indicated failed component.

Source: manufacturer service documentation.

Common causes of OUTDOOR_YELLOW_GREEN_FLICKER_RED_FLICKER

  1. 01

    Failed outdoor control board

    Part replacement

    The DC-Link voltage sensing circuit is integrated into the outdoor control board. A failure of this circuit, its associated components, or the board's processor is the most common and direct cause of this error, and board replacement is the primary recommended repair.

  2. 02

    Degraded DC bus capacitors

    Part replacement

    Electrolytic capacitors on the DC-Link bus can degrade over time, causing excessive voltage ripple that the sensor interprets as a fault condition. Visually inspect capacitors for bulging or leakage, though capacity loss may not be visible.

  3. 03

    Abnormal incoming supply voltage

    Wiring / connection

    Supply voltage that is too high, too low, or heavily distorted can push the DC bus voltage outside the sensor's acceptable range. Measure the incoming line voltage at the outdoor unit disconnect and confirm it matches the unit's rated supply specification.

  4. 04

    Damaged wiring or connectors in the sensing circuit

    Wiring / connection

    Corrosion, loose connectors, or damaged wiring between the DC bus sensing point and the control board processor can produce an erratic or absent sensor signal. Inspect all connectors on the outdoor control board for corrosion and secure seating.

See the test procedure for each cause

Frequently asked questions about OUTDOOR_YELLOW_GREEN_FLICKER_RED_FLICKER

What does OUTDOOR_YELLOW_GREEN_FLICKER_RED_FLICKER mean on a Samsung air conditioner?
This error code indicates a DC-Link voltage sensor error in the outdoor unit. The DC-Link is part of the inverter drive circuit that supplies stable DC voltage to the compressor. When the control board detects that the sensor signal is missing, erratic, or out of range, it triggers this fault and stops the compressor to prevent damage. The outdoor unit's indicator LEDs display this specific flicker pattern to communicate the fault code.
Can I fix the OUTDOOR_YELLOW_GREEN_FLICKER_RED_FLICKER error myself?
The primary repair is replacement of the outdoor control board, which involves working inside the outdoor unit near high-voltage inverter components. Technicians should verify the incoming supply voltage is correct before replacing the board, as that check is safe and straightforward. However, handling the control board and DC bus components requires familiarity with high-voltage safety procedures, so most homeowners should contact a qualified HVAC technician.
Will resetting my Samsung air conditioner clear this error code?
A power reset may temporarily clear the displayed error, but if the DC-Link voltage sensor or the outdoor control board is genuinely faulty, the error will return once the unit attempts to operate again. A reset alone does not address the underlying hardware failure. Persistent recurrence after a reset confirms that a component repair or replacement is needed.
Is it safe to keep running my air conditioner when this error is showing?
The unit will typically shut down the compressor automatically when this error is active, preventing normal operation. You should not attempt to force the unit to run through repeated resets while the fault persists. Continuing to cycle power repeatedly without addressing the root cause can stress the inverter components further and potentially worsen the damage.
How much does it cost to repair the OUTDOOR_YELLOW_GREEN_FLICKER_RED_FLICKER error on a Samsung air conditioner?
Repair costs depend primarily on the price of the outdoor control board and local labor rates. Outdoor control boards for Samsung inverter units typically range from $150 to $400 or more depending on the model, and labor for diagnosis and replacement can add $100 to $250. Total repair costs commonly fall in the range of $250 to $650, though complex installations or additional parts needs can increase that estimate.

Related Samsung air conditioner codes

All Samsung air conditioner codes
View all 572 Samsung air conditioner codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass