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Error code reference

Samsung Air Conditioner Error Code OUTDOOR_YELLOW_GREEN_RED_ALL_FLICKER

PFC OC error

Samsung codesSamsung air conditioner codes

PFC OC 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.

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  • Wiring diagram references and connector pinouts from the OEM service manual
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What OUTDOOR_YELLOW_GREEN_RED_ALL_FLICKER means on a Samsung air conditioner

The OUTDOOR_YELLOW_GREEN_RED_ALL_FLICKER error on a Samsung air conditioner indicates a PFC OC (Power Factor Correction Overcurrent) fault. This error is detected in the outdoor unit and is signaled by all three diagnostic LEDs, yellow, green, and red, flickering simultaneously. The PFC circuit is a stage in the outdoor unit's inverter power supply that conditions incoming AC power before it is converted to DC for the compressor drive. Its primary function is to boost DC bus voltage to a stable level while correcting the power factor to near unity, reducing harmonic distortion and improving efficiency.

An overcurrent condition in the PFC stage means the circuit has detected current flowing through the PFC components at a level that exceeds safe operating thresholds. This can result from a failed PFC inductor, a shorted or degraded IGBT or diode within the PFC circuitry, a failing electrolytic capacitor on the DC bus, or a fault within the control logic that monitors and regulates PFC switching. Wiring faults and loose connections in the high-voltage section of the outdoor board can also cause transient overcurrent events that latch the fault.

Because the PFC circuit is integrated into the outdoor control board assembly in most Samsung inverter outdoor units, the primary recommended diagnostic action is replacement of the outdoor control board. Before replacing the board, a technician should inspect the high-voltage wiring harness for damage, check for signs of burned or cracked components on the existing board, and verify that line voltage supply to the outdoor unit is within specification. If the new board triggers the same fault, further investigation into the compressor, reactor coil, or DC bus capacitor condition may be warranted.

Source: manufacturer service documentation.

Common causes of OUTDOOR_YELLOW_GREEN_RED_ALL_FLICKER

  1. 01

    Failed outdoor control board

    Part replacement

    The PFC regulation circuitry, including the IGBT switching components and current sensing circuit, is integrated on the outdoor control board. Internal component failure on the board is the most common source of this fault and replacement is the primary recommended repair.

  2. 02

    Shorted or degraded PFC IGBT or diode

    Part replacement

    A short-circuit or partial failure in the IGBT transistor or rectifier diode within the PFC stage causes excessive current draw that trips the overcurrent protection. Visual inspection may reveal burn marks or a blown component on the board.

  3. 03

    DC bus capacitor failure

    Part replacement

    A failing or shorted electrolytic capacitor on the DC bus can cause voltage instability that forces the PFC circuit into an overcurrent condition. Bulging, leaking, or discolored capacitors are signs of this issue.

  4. 04

    Damaged or loose high-voltage wiring

    Wiring / connection

    Loose connectors or damaged wiring in the high-voltage section of the outdoor unit can cause intermittent overcurrent events. Inspect all wiring harnesses and terminal connections in the outdoor unit for signs of arcing, corrosion, or poor contact.

  5. 05

    Low or unstable supply voltage

    Wiring / connection

    If line voltage to the outdoor unit is below specification or fluctuating significantly, the PFC stage may draw excess current trying to compensate. Verify supply voltage at the disconnect with a multimeter under load conditions.

See the test procedure for each cause

Frequently asked questions about OUTDOOR_YELLOW_GREEN_RED_ALL_FLICKER

What does OUTDOOR_YELLOW_GREEN_RED_ALL_FLICKER mean on a Samsung air conditioner?
This LED pattern on the Samsung outdoor unit indicates a PFC OC (Power Factor Correction Overcurrent) error. The PFC circuit, which regulates and stabilizes power delivery to the compressor drive, has detected current exceeding safe operating limits. The unit shuts down automatically to prevent damage to internal components. Diagnosis typically begins with inspection and replacement of the outdoor control board.
Can I fix the OUTDOOR_YELLOW_GREEN_RED_ALL_FLICKER error myself?
This fault involves the high-voltage inverter section of the outdoor unit, which carries dangerous voltages even after power is disconnected due to stored charge in capacitors. Repair is strongly recommended to be performed by a qualified HVAC technician. A homeowner can check that the outdoor unit has clean power supply and that no wiring is visibly damaged, but board-level repair or replacement requires professional handling.
Is it safe to keep running my air conditioner when this error appears?
No. The PFC OC error causes the outdoor unit to shut down as a protective measure, so the system will not operate normally while the fault is active. Attempting to repeatedly force the system to restart without resolving the underlying cause can cause additional damage to inverter components. Leave the unit powered off and contact a technician.
Will resetting my Samsung air conditioner clear this error?
A power reset may temporarily clear the fault and allow the unit to attempt operation again, but if the underlying hardware fault persists, the error will return, often within minutes of restarting. This error is caused by a hardware failure in the PFC circuit, not a software or communication glitch, so a reset alone is not a repair. The root cause must be identified and corrected.
How much does it cost to repair the OUTDOOR_YELLOW_GREEN_RED_ALL_FLICKER error on a Samsung air conditioner?
Repair costs vary based on the specific outdoor unit model and local labor rates. Outdoor control board replacement parts typically range from $150 to $450 depending on the unit, with labor adding $100 to $250 or more. If additional components such as the reactor coil or DC bus capacitor are also found to be damaged, total repair costs can be higher. A technician should diagnose the unit before parts are ordered.

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