Quick answer

Replace the Duux North 14K power PCB by disconnecting power, removing the access panel, swapping the board, and testing before reassembly. This guide covers models DXMA10 and DXMA11.

Why replace the power PCB?

The power circuit board controls the compressor, fan, and safety systems. If your North 14K unit fails to power on, cycles unexpectedly, or shows error codes, a faulty PCB is often the cause. Replacing it restores normal operation without replacing the entire unit.

Before you begin

Always disconnect the unit from mains power before opening any panel. Use a multimeter to confirm zero voltage at the board terminals. The replacement board (Power PCB North 14K) is compatible only with DXMA10 and DXMA11 types. Verify your unit's model number on the rating plate before ordering.

Replacement steps

  1. 1. Disconnect power and remove the panel: Turn off the circuit breaker for the AC unit. Remove the front grille and the control box cover (usually 4–6 screws). Take a photo of the wiring layout for reference. Common mistake: forgetting to photograph the original wiring, causing confusion during reconnection.
  2. 2. Detach the old PCB: Gently unplug all wire connectors from the old board. Remove the mounting screws and lift the board out. Note the position of any grounding wires. Checkpoint: inspect the old board for burn marks or swollen capacitors—this indicates a root cause (e.g., surge) that may need further investigation.
  3. 3. Install the new power PCB: Place the new board in the same orientation. Secure it with the mounting screws. Reconnect each wire connector according to your photo. Tighten any screw terminals firmly. Common mistake: reversing two connectors of the same color—label them with tape if needed.
  4. 4. Test before reassembly: With the panel still open, restore power briefly. Check that the unit powers on, the display works, and no error codes appear. Turn off power again. Checkpoint: if the unit does not power on, recheck all connections and ensure the board is seated properly.
  5. 5. Reassemble and final test: Replace the control box cover and front grille. Restore power and run the unit in cooling mode for 10 minutes to confirm normal operation.

Replacement part

  • Power PCB North 14K: Power PCB North 14K is a replacement power board for Duux North 14K, compatible with DXMA10 and DXMA11 types. Using the correct board ensures proper fit and electrical compatibility, preventing damage or safety hazards.

    Power PCB North 14K

    Power PCB North 14K