1. Sarrera
This manual provides detailed instructions for the installation, operation, and maintenance of your Montech AIR 903 MAX E-ATX Mid Tower Case. Please read this manual thoroughly before beginning assembly to ensure proper setup and optimal performance.

Figure 1.1: Montech AIR 903 MAX E-ATX Mid Tower Case. This image displays the case from a front-left angle, highlighting the mesh front panel with three illuminated ARGB fans and the tempered glass side panel.
2. Konfigurazioa eta instalazioa
Follow these steps to properly set up your Montech AIR 903 MAX case and install your components.
2.1 Kutxatik ateratzea eta prestatzea
Carefully remove the case from its packaging. Inspect for any damage during transit. Ensure all accessories listed in the packing list are present. These typically include screws, cable ties, and additional standoffs.
2.2 Side Panel Removal
To access the interior, remove the tempered glass side panel and the solid steel side panel. The tempered glass panel is typically secured with captive thumbscrews at the rear. The steel panel slides off after removing its thumbscrews.

2.1. Irudia: Barrualdea view of the Montech AIR 903 MAX case. This image shows the spacious interior with the tempered glass side panel removed, revealing the motherboard tray, fan mounts, and PSU shroud.
2.3 Plaka amaierako instalazioa
- Identify the correct standoff positions for your motherboard (E-ATX, ATX, Micro-ATX, Mini-ITX). The case supports E-ATX motherboards.
- Install any necessary additional standoffs. Ensure all standoffs align with your motherboard's mounting holes.
- Carefully place your motherboard onto the standoffs, aligning the I/O shield with the rear opening.
- Lotu plaka nagusia emandako torlojuekin. Ez estutu gehiegi.

Figure 2.2: Motherboard compatibility diagram. This diagram illustrates the supported motherboard form factors (CEB, EEB) within the case, indicating the available mounting areas.
2.4 Energia hornitzeko unitatea (PSU) instalatzea
- Mount your PSU into the dedicated compartment at the bottom rear of the case.
- Lotu PSUa kaxaren atzealdeko torlojuekin.
- Route necessary power cables through the cutouts in the PSU shroud and motherboard tray.
2.5 Biltegiratze-gailuaren instalazioa
The case supports multiple storage drives. Refer to the case's internal structure for specific 2.5" SSD and 3.5" HDD mounting locations, typically behind the motherboard tray or within the PSU shroud.
2.6 Txartel grafikoaren (GPU) instalazioa
- Kendu beharrezko PCIe zirrikituen estalkiak kaxaren atzealdetik.
- Insert your graphics card into the appropriate PCIe slot on your motherboard.
- Secure the graphics card with screws. The case accommodates GPUs up to 400mm in length and 190mm in width.
2.7 Haizagailuaren eta erradiadorearen instalazioa
The Montech AIR 903 MAX comes with pre-installed 140mm ARGB PWM fans (3x front, 1x rear). Additional fans or radiators can be installed:
- Aurrealdea: Supports up to 360mm AIO liquid coolers.
- Goia: Supports up to 360mm AIO liquid coolers.
- CPU hozgailuaren sakea: Up to 180mm height for air coolers.

Figure 2.3: Component clearance diagram. This image highlights the maximum dimensions for CPU coolers, graphics cards, and radiator installations within the case.
2.8 Kableen kudeaketa
Utilize the cable routing channels and included velcro cable ties behind the motherboard tray to organize your cables. The integrated fan hub simplifies fan connections, requiring only a SATA power connection from your PSU and an ARGB header connection to your motherboard for full control.
2.9 Front I/O Connections
Connect the front panel cables to your motherboard:
- USB 3.0: Connect the USB 3.0 header cable to your motherboard's USB 3.0 port.
- USB C mota: Connect the USB Type-C header cable to your motherboard's Type-C port (if available).
- HD audioa: Konektatu HD Audio kablea zure plaka basearen audio goiburura.
- Power SW, Reset SW, HDD LED: Connect these small pinouts to the corresponding headers on your motherboard.
- ARGB goiburua: Connect the ARGB cable from the fan hub to your motherboard's 5V ARGB header for software control. If left unplugged, the case's dedicated RGB button will control lighting.

Figure 2.4: Top I/O panel. This image shows the top-mounted input/output ports, including USB 3.0, USB Type-C, audio jacks, and control buttons.
3. Funtzionamendua
3.1 Piztea
After all components are installed and cables are connected, ensure your power supply is switched on. Press the power button on the top I/O panel to start your system.
3.2 Fan and RGB Control
- PWM Fans: The pre-installed PWM fans are connected to a fan hub. Connect the fan hub to a PWM header on your motherboard to control fan speeds via BIOS or motherboard software.
- ARGB argiztapena: The ARGB fans can be controlled in two ways:
- Plaka basearen softwarearen kontrola: Connect the ARGB cable from the fan hub to your motherboard's 5V ARGB header. Use your motherboard's RGB software to customize lighting effects.
- Case Button Control: If the ARGB cable is not connected to the motherboard, use the dedicated RGB button on the top I/O panel to cycle through pre-set lighting modes. Press and hold the RGB button for 3 seconds to switch between software control and case button control (if connected to motherboard).
4. Mantentzea
Regular maintenance helps ensure optimal airflow and extends the lifespan of your components.
4.1 Hauts-iragazkiaren garbiketa
- Aurrealdeko sare-panela: The front mesh panel acts as a dust filter and can be easily removed for cleaning. Gently pull the bottom of the front panel to detach it. Clean with compressed air or a soft brush.
- Top Magnetic Filter: The top dust filter is magnetic and can be lifted off for cleaning.
- Bottom PSU Filter: The filter beneath the PSU can be slid out from the rear for cleaning.

Figure 4.1: Front panel removal. This diagram illustrates how to detach the front mesh panel for easy cleaning of the dust filter.
4.2 Garbiketa orokorra
Use a soft, dry cloth to wipe down the exterior of the case. For tempered glass, use a glass cleaner applied to a cloth (not directly to the glass) to avoid streaks.
5. Arazoak
If you encounter issues with your Montech AIR 903 MAX case, consider the following common solutions:
- Sistemak ez du pizten:
- Ziurtatu elikadura-iturria piztuta dagoela eta hormako entxufean behar bezala konektatuta dagoela.
- Egiaztatu aurrealdeko paneleko etengailuaren kablea plaka basearen elikatze-burura behar bezala konektatuta dagoela.
- Egiaztatu plaka nagusira eta osagaietara doazen energia-konexio guztiak.
- Haizagailuak ez dira biratzen/RGB ez dabil:
- Ensure the fan hub is receiving SATA power from the PSU.
- If using motherboard software control, verify the ARGB cable from the hub is connected to a 5V ARGB header and the software is correctly configured.
- If using the case button, ensure the ARGB cable is not connected to the motherboard, or press and hold the RGB button for 3 seconds to switch control modes.
- Check individual fan connections to the fan hub.
- USB atakak ez dute funtzionatzen:
- Verify that the front panel USB 3.0 and USB Type-C cables are securely connected to the corresponding headers on your motherboard.
- Tight Cable Management:
- The space behind the motherboard tray is designed for efficient cable routing. Take time to bundle and route cables carefully using the provided velcro ties.
For further assistance, please contact Montech customer support.
6. Zehaztapenak
| Ezaugarri | Xehetasuna |
|---|---|
| Marka | Montech |
| Ereduaren izena | AIR 903 MAX |
| Elementuaren eredu-zenbakia | AIR903MAXB |
| Kasu mota | Mid dorrea |
| Plaka amaren bateragarritasuna | ATX hedatua, ATX, Mikro-ATX, Mini-ITX |
| Materiala | Metala, beira tenplatua |
| Kolorea | Beltza |
| Produktuaren neurriak (LxWxH) | 18.82 x 9.05 x 19.41 hazbete (47.8 x 22.99 x 49.3 cm) |
| Elementuaren pisua | 20.5 libra (9.3 kg) |
| Hozteko metodoa | Airea |
| Aurrez instalatutako zaleak | 3x 140mm ARGB PWM (Front), 1x 140mm PWM (Rear) |
| Aurreko erradiadorearen euskarria | Gehienez 360 mm |
| Goiko erradiadorearen euskarria | Gehienez 360 mm |
| CPU hozkailuaren altuera-tartea | 180 mm |
| GPUaren luzera sakea | 400 mm |
| GPU Width Clearance | 190 mm |
| USB 3.0 Portuak | 2 |
| USB C motako atakak | 1 |

Figure 6.1: Product Dimensions. This image provides a visual representation of the case's length, width, and height measurements.
7. Bermea eta Laguntza
7.1 Bermearen informazioa
Montech products are manufactured to high quality standards. For specific warranty terms and conditions applicable to your region, please refer to the warranty card included with your product or visit the official Montech webgunea.
7.2 Bezeroarentzako laguntza
If you require technical assistance or have questions regarding your Montech AIR 903 MAX case, please contact Montech customer support through their official website. Provide your product model number (AIR903MAXB) and a detailed description of your issue for efficient service.

Figure 7.1: Montech Logo.