1. Introduction
Thank you for choosing the COMMAX Smart Digital Door Lock CDL-88PBio. This manual provides essential information for the proper installation, operation, and maintenance of your new digital door lock. Please read this manual thoroughly before installation and keep it for future reference.

Image 1.1: Front view of the COMMAX CDL-88PBio Smart Digital Door Lock. This image displays the sleek, modern design of the lock's exterior unit, featuring a keypad and a fingerprint sensor.
2. Safety Information
To ensure safe operation and prevent damage, please observe the following precautions:
- Do not attempt to disassemble or repair the lock yourself. Contact qualified service personnel.
- Avoid exposing the lock to direct water or excessive moisture.
- Use only specified batteries (8x AA Alkaline batteries). Do not mix old and new batteries or different types of batteries.
- Keep the mechanical keys in a safe place outside the property.
- Change your PIN and register fingerprints/RF cards immediately after installation to ensure security.
- The lock is designed for normal fire doors with a thickness of 40mm to 80mm. Ensure your door meets these specifications.
3. Package Contents
Verify that all components are present before beginning installation:

Image 3.1: Exploded view showing all components included with the COMMAX CDL-88PBio. This includes the exterior and interior lock bodies, mortise, strike plate, screws, batteries, smart keys, emergency keys, and the user manual.
- Exterior Lock Body
- Interior Lock Body
- Mortise
- Strike Plate
- Screws (various sizes)
- AA Alkaline Batteries (8 pcs)
- Smart Keys (6 pcs)
- Emergency Mechanical Keys (4 pcs)
- Installation Template
- User Manual (this document)
- Warranty Card
4. Product Specifications
| Brand | COMMAX |
| Model | CDL-88PBio |
| Material | Metal |
| Applicable Door Thickness | 40mm - 80mm |
| Power Source | DC 6V (8x AA Alkaline batteries, LR6 1.5V AA size) |
| Emergency Power | 9V Square Battery |
| Product Type | Fireproof, Temperature Sensor, Key Type, Master Key Door Lock |
| Temperature Alarm | Activates at 60°C ± 10°C |
| Optional Modules | WIFI Module / Remote Module (CDL-447) |
| Dimensions (W x H x D) | 84mm x 454mm x 50mm |
| Access Methods (CDL-88PBio) | PIN (6-8 digits with face recognition, or 4-12 digits), RF Card (Max 100), Mechanical Key, Fingerprint (Max 100) |
| Access Methods (CDL-88P) | PIN (4-12 digits), RF Card (Max 30), Mechanical Key, Fingerprint (Max 100) |

Image 4.1: Diagram illustrating the dimensions of the COMMAX CDL-88PBio lock, showing its width (84mm) and height (454mm).
5. Installation
Before installation, ensure your door is compatible with the lock. Refer to the compatibility chart below. Professional installation is recommended.

Image 5.1: Door compatibility chart. This diagram helps determine if your existing door lock type (secondary key or main key) is compatible with the COMMAX digital door lock. It also indicates that glass doors require specific products and some door types are not compatible.
5.1. Pre-Installation Check
- Confirm door thickness is between 40mm and 80mm.
- Check door frame and existing lock for any obstructions.
- Ensure you have all necessary tools (drill, screwdriver, measuring tape, etc.).
5.2. Installation Steps
Follow the detailed diagram for component assembly:

Image 5.2: Detailed installation diagram showing the assembly sequence of the COMMAX CDL-88PBio digital door lock components, including the mortise, exterior and interior units, and various screws.
- Prepare the door according to the provided template.
- Install the mortise into the door edge.
- Connect the cables from the exterior unit to the interior unit.
- Mount the exterior and interior units, securing them with screws.
- Install the strike plate on the door frame.
- Insert the 8 AA batteries into the interior unit's battery compartment.
- Test the lock's basic functions (locking/unlocking).
6. Operating Instructions
The COMMAX CDL-88PBio offers multiple access methods for convenience and security.

Image 6.1: Close-up view of the COMMAX CDL-88PBio's exterior unit, highlighting the illuminated keypad and the integrated fingerprint sensor for various access methods.
6.1. PIN Code Access
- Setting PIN: Refer to the programming section in the full manual for initial PIN setup.
- Unlocking: Touch the keypad to activate, enter your 4-12 digit PIN, and press * or # (depending on model/setting).
- Dummy PIN Function: To prevent PIN exposure, you can enter random numbers before or after your actual PIN. For example, [Random Numbers] + [Your PIN] + [Random Numbers].
6.2. Fingerprint Access
- Registering Fingerprints: Follow the programming instructions to register up to 100 fingerprints.
- Unlocking: Place your registered finger on the fingerprint sensor until the lock unlocks.
6.3. RF Card Access
- Registering RF Cards: Up to 100 RF cards can be registered. Refer to the programming guide.
- Unlocking: Place a registered RF card against the card reader area on the exterior unit.
6.4. Mechanical Key Access
- Emergency Use: In case of battery depletion or electronic malfunction, use the mechanical key to unlock the door.
- Accessing Keyhole: The mechanical keyhole is typically concealed. Refer to the lock diagram for its location.
6.5. Automatic Locking
The lock automatically secures the door after it closes. This feature can usually be toggled on/off in the settings.
6.6. Double Lock Function
Activate the double lock from the interior unit for enhanced security, preventing entry from the outside even with valid credentials.
7. Maintenance
Proper maintenance ensures the longevity and optimal performance of your digital door lock.
- Cleaning: Wipe the lock's surface with a soft, dry cloth. Do not use abrasive cleaners, solvents, or harsh chemicals.
- Battery Replacement: Replace all 8 AA batteries when the low battery indicator appears. Use only new, high-quality alkaline batteries.
- Fingerprint Sensor: Keep the fingerprint sensor clean and dry for accurate recognition.
- Mechanical Parts: Avoid applying lubricants to the lock cylinder or internal mechanisms unless specifically instructed by COMMAX support.
8. Troubleshooting
Refer to this section for common issues and their solutions.
- Lock not responding:
- Check if batteries are depleted. Replace all 8 AA batteries.
- If batteries are dead, use a 9V emergency battery to power the lock temporarily.
- Fingerprint not recognized:
- Ensure your finger is clean and dry.
- Try placing your finger in different positions on the sensor.
- Re-register your fingerprint if the issue persists.
- PIN code not working:
- Ensure you are entering the correct PIN.
- Try using the dummy PIN function.
- If multiple incorrect attempts are made, the lock may temporarily disable the keypad. Wait a few minutes.
- Door does not lock/unlock properly:
- Check for any physical obstructions in the door frame or mortise.
- Ensure the door is fully closed before attempting to lock.
- Verify that the mortise and strike plate are correctly aligned.
- Alarm sounds unexpectedly:
- Check for signs of forced entry or tampering.
- If a temperature alarm, check for heat sources near the lock.
- Refer to the full manual for specific alarm codes and their meanings.
9. Warranty and Support
COMMAX products are manufactured under strict quality control. In the unlikely event of a defect due to manufacturing faults, the product is covered by a warranty. Please refer to the warranty card included in your package for specific terms and conditions.
For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact COMMAX customer support through their official website or the contact information provided on your warranty card.
Online Resources: For additional support and updated information, visit the official COMMAX website: www.commax.com





