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Error code reference

Samsung Air Conditioner Error Code E368

Output current sensor error of inverter PBA2.

Samsung codesSamsung air conditioner codes

Output current sensor error of inverter PBA2.

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What E368 means on a Samsung air conditioner

Error code E368 on a Samsung air conditioner indicates an output current sensor error originating from inverter PBA2. The inverter PBA2 is a power board assembly responsible for driving the compressor by converting DC voltage into variable-frequency AC output. Embedded within this board are current sensing circuits, typically Hall-effect sensors or shunt resistors paired with op-amp circuitry, that continuously monitor the current flowing from the inverter output to the compressor windings. When the control system detects that the current sensor signal is missing, out of expected range, or erratic, it triggers E368 to protect the system from undetected overcurrent or short-circuit conditions.

The most common root causes fall into two categories: failures within the PBA2 board itself and wiring or connection issues between the board and the compressor. The current sensing circuitry on PBA2 can fail due to heat stress, component aging, or surge damage, causing the sensor output to read incorrectly. Loose, corroded, or damaged connector pins on the board's output harness can also produce intermittent or absent sensor signals. In some cases, a failing or shorted compressor draws abnormal current that the sensor circuit flags as an error before the compressor fully fails.

Because this error involves inverter board circuitry carrying high-voltage DC and AC signals, accurate diagnosis requires measurement of sensor output voltages at the board connectors and inspection of the compressor winding resistance. A technician should verify connector integrity, check for obvious board damage such as burned components or swollen capacitors, and test compressor winding resistance to rule out a compressor fault before condemning PBA2.

Source: manufacturer service documentation.

Common causes of E368

  1. 01

    Failed current sensing circuit on inverter PBA2

    Part replacement

    The current sensor components on the PBA2 board, such as Hall-effect sensors or shunt-based sensing circuits, can fail due to heat stress or component aging, causing the sensor signal to fall outside the expected voltage range. Visual inspection may reveal burned components or damaged traces on the board.

  2. 02

    Loose or corroded connector on PBA2 output harness

    Wiring / connection

    Poor contact at the output wiring harness connector between PBA2 and the compressor can disrupt the current sensor signal path. Inspect all connector pins for corrosion, bent terminals, or incomplete seating.

  3. 03

    Damaged wiring between PBA2 and compressor

    Part replacement

    Chafed, pinched, or broken wires in the output harness can cause intermittent or absent sensor readings. A visual inspection of the wire routing and a continuity test of each conductor will identify this issue.

  4. 04

    Failing or shorted compressor

    Part replacement

    A compressor with degraded or shorted windings can draw abnormal current that triggers the sensor error circuit. Measuring compressor winding resistance with a multimeter and checking for continuity to ground will help confirm or rule out this cause.

  5. 05

    Surge or power event damage to PBA2

    Part replacement

    A voltage surge or power interruption can damage the inverter board's internal circuitry, including the current sensing section. Evidence may include burned or discolored areas on the board surface.

See the test procedure for each cause

Frequently asked questions about E368

What does E368 mean on a Samsung air conditioner?
E368 indicates an output current sensor error on inverter PBA2, the power board assembly that drives the compressor. The system detected that the current sensor signal from the board was missing, erratic, or outside the expected range. The unit shuts down to prevent damage from an unmonitored electrical fault. A technician needs to inspect the board, connectors, wiring, and compressor to determine the root cause.
Can I fix E368 myself, or do I need a technician?
This error involves high-voltage inverter circuitry, so most of the diagnostic and repair work should be performed by a qualified technician. A homeowner can check for obvious issues like tripped breakers or loose external connections, but safely testing the PBA2 board and compressor wiring requires training and appropriate test equipment. Attempting to work inside the unit without proper knowledge poses a serious electrical hazard.
Is it safe to run my Samsung air conditioner with error E368 displayed?
No, you should not continue operating the unit while E368 is active. The error indicates the system cannot reliably monitor compressor current, which means a developing electrical fault could go undetected and lead to compressor failure or more serious damage to the inverter board. Keep the unit off until the fault is diagnosed and repaired.
Will resetting the air conditioner clear the E368 error?
A power reset may temporarily clear the error display, but if the underlying cause is a hardware fault in the PBA2 board, wiring, or compressor, the code will return once the unit restarts and attempts to operate. Resetting is not a repair and should only be used as a diagnostic step to determine whether the fault is intermittent. Persistent reappearance of E368 confirms that a component failure requires attention.
How much does it cost to repair a Samsung air conditioner showing E368?
Repair costs vary depending on the root cause. If only a connector or wire harness repair is needed, costs are generally lower, typically in the range of $100 to $250 including labor. Replacing the inverter PBA2 board is more expensive, often ranging from $300 to $600 or more depending on the unit model and labor rates. If the compressor itself has failed, replacement costs can exceed $800 to $1,500. A diagnostic visit is the best way to get an accurate estimate.

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