Simply press and hold the light button for 2-3 seconds to switch the air outlet temperature display between Fahrenheit and Celsius.

Step 1: Disconnect the air conditioner from its power source and remove the batteries from the remote control.

Step 2: Reconnect the power supply and turn on the Mark 3 by pressing and holding the power button. Reinsert the batteries into the remote.

Step 3: On the Mark 3, press and hold both the fan speed button and the light button simultaneously for 2 seconds until you hear a "ding" sound and the Wi-Fi signal icon starts flashing.

Step 4: On the remote, press and hold the fan speed + button and the light button together until you hear two "ding-ding" sounds. This indicates successful pairing. (The Wi-Fi signal icon on the Mark 3 and the remote will stop flashing when pairing is successful.)

Error code E20 indicates that the intake air temperature at the front fan has fallen below 10°C (50°F) during heating mode. To protect the system and prevent evaporator freezing, the Mark 3 will automatically disable the compressor, front fan, and rear fan, and display the E20 error.

The Mark 3 has a built-in timer function, but there is no physical “Timer” button on the unit itself. You'll need to use the remote control or mobile app to access this feature.

• To set the timer:

1. Turn on the air conditioner.
2. Press the "Timer" button on the remote control or within the mobile app.
3. Use the "+" or "–" buttons to choose the timer duration (from 0.5 to 12 hours in 0.5-hour increments).
4. Once you've selected the desired time, press the "Timer" button again. A "ding" sound will confirm the setting, and the Timer icon will stop flashing.

• To cancel the timer:

Continue pressing the "Timer" button until the timer setting cycles back to zero, or simply turn off the air conditioner manually before the timer runs out.

Align the unit's latches with those on the battery base. Slide the Mark 3 forward until you hear a click, indicating a secure connection.

It's easy! Just follow these 3 simple steps:

1. Connect the drainage pipe.
2. Plug the Mark 3 into a power source.
3. Select your desired cooling mode.

Let the unit run for a few minutes to ensure everything works properly.

You can also watch our step-by-step video guide here: Quick Test Guide.

App upgrades may fail if the process is interrupted. Please ensure:

• Your device maintains a stable network connection.
• Your phone screen remains active during the update.
• You avoid answering calls or allowing interruptions during the process.

If the issue continues, try restarting your device and updating again.

While the Sleep mode operates at a quiet 46 dB(A), we understand that this may still be noticeable for some sensitive users.

Here are a couple of suggestions to potentially reduce the perceived noise:

• Adjust the Air Deflector: Gently raise the front air deflector to its highest position. This may help redirect airflow and reduce perceived noise.
• Ensure a Stable Surface: Place the unit on a flat, stable surface to minimize vibrations, which can reduce operational sounds.