Strnek 715990940402
Strnek Mechanical Code Lock User Manual
Model: 715990940402
Introduction
Thank you for choosing the Strnek Mechanical Code Lock. This keyless combination lock provides enhanced security and convenience for various applications, including office doors, interior doors, rental doors, and wooden doors. Made from durable zinc alloy, it offers a robust and reliable security solution without the need for traditional keys.
This manual provides detailed instructions for installation, operation, and maintenance to ensure optimal performance and longevity of your lock.
Package Contents
Please verify that all components listed below are included in your package:
- 1 x Panel (Front and Back Handles)
- 1 x Lock body
- 1 x Lock Card
- 1 x Card slot
- 1 x Installation accessories (screws, spindles, etc.)
- 2 x Rubber lock gaskets
- 1 x Instruction manual (this document)

Image: All components included in the Strnek Mechanical Code Lock package.

Image: Close-up of the installation accessories, including various screws and the spindle.
Specifications
| Brand | Strnek |
| Material | Zinc Alloy (Lock body: Steel + zinc) |
| Applicable Door Thickness | 30-60mm |
| Applicable Type | Indoor, Outdoor (covered) |
| Password Length | 1-11 Digits (Recommended: 4-6 digits) |
| Center Distance of Lock Tongue | Standard 60mm (Optional 70mm) |
| Panel Dimensions (L x W x H) | 14.2 x 4.4 x 7cm / 5.59 x 1.73 x 2.76 inches (approx.) |
| Lock Body Dimensions (L x W x H) | 14.2 x 4.4 x 6.4cm / 5.59 x 1.73 x 2.52 inches (approx.) |
| Item Weight | 1.39 Kilograms / 3.06 pounds |

Image: Dimensional specifications of the lock panel.
Setup and Installation
Follow these steps carefully to install your Strnek Mechanical Code Lock:
Prepare the Door: Ensure your door thickness is between 30-60mm. Mark the positions for drilling holes for the lock body and the through-bolts according to the provided template (if included, otherwise measure carefully).
Install the Lock Body: Insert the lock body into the edge of the door. Secure it with screws. Ensure the latch bolt extends and retracts smoothly.

Image: The lock body and strike plate, essential for installation.
Install the Strike Plate: Position the strike plate on the door frame so that the latch bolt aligns perfectly. Mark and chisel out the recess for the strike plate and secure it with screws.
Attach the Panels:
- Insert the spindle through the lock body.
- Place the rubber gaskets on both sides of the door panels.
- Align the front panel (with the keypad) and the back panel (with the handle) with the drilled holes and the spindle.
- Secure the panels using the long through-bolts, ensuring they are tightened evenly to prevent misalignment.

Image: Front and back handles of the lock, illustrating their positions.
Test Operation: Before closing the door, test the lock mechanism. Ensure the handle turns freely and the latch retracts when the correct code is entered and the handle is turned. Also, check that the lock engages properly when the door is closed.

Image: The Strnek Mechanical Code Lock installed on a door, demonstrating its keyless operation.
Operating Instructions
The Strnek Mechanical Code Lock operates without batteries and uses a mechanical combination system.
Setting the Password
This lock has a single set of passwords, and the numbers are not repeatable. For example, if the password is set to "123456", entering "231456" will also open it, as long as all the correct digits are pressed, regardless of order. The recommended password length is 4-6 digits, but it supports 1-11 digits.
To set or change the password, you will typically need to access the internal mechanism of the lock panel. Refer to the specific instructions provided with your lock for the exact procedure, as this often involves rotating pins on the back of the keypad to correspond with your desired code. Always perform password changes with the lock disassembled or in an unlocked state to avoid locking yourself out.

Image: The keypad of the lock, highlighting the sensitive and easy-to-operate buttons for setting the 1-11 digit password.

Image: The 'C' button on the keypad serves as a reset button for incorrect password entries.
Unlocking the Door
- Enter the Code: Press the digits of your set password in any order.
- Turn the Handle: After entering the correct digits, turn the handle to retract the latch bolt.
- Open the Door: Push or pull the door open.
Locking the Door
To lock the door, simply close it. The latch bolt will automatically extend and secure the door. No code entry is required to lock the door from the outside or inside.

Image: The lock is suitable for various doors, including office and interior doors.
Maintenance
- Cleaning: Wipe the lock surface with a soft, damp cloth. Avoid abrasive cleaners or solvents that could damage the finish.
- Lubrication: Periodically apply a small amount of silicone-based lubricant to the latch bolt and internal moving parts to ensure smooth operation. Do not use oil-based lubricants as they can attract dust.
- Inspection: Regularly check all screws and fasteners to ensure they are tight. If any part appears loose or damaged, tighten or replace it as necessary.
- Environmental Conditions: While the lock is durable, prolonged exposure to extreme weather conditions (e.g., direct rain, extreme cold/heat) may affect its longevity. If installed outdoors, ensure it is in a sheltered location.
Troubleshooting
Lock not opening with correct code:
- Ensure all correct digits are pressed. Remember the order does not matter, but all required digits must be pressed.
- Press the 'C' (reset) button before re-entering the code.
- Check if the handle is turning freely. If stiff, apply lubricant to the spindle and latch mechanism.
- Verify that the internal password setting pins are correctly aligned with your chosen code.
Handle is loose or not engaging:
- Tighten the through-bolts connecting the front and back panels.
- Ensure the spindle is correctly inserted and engaging with both handles and the lock body.
Latch bolt not retracting/extending smoothly:
- Check for obstructions in the door frame or strike plate.
- Lubricate the latch bolt mechanism.
- Ensure the lock body is installed straight and not binding.
Warranty and Support
Strnek provides a performance assurance for this product. If you encounter any issues with your mechanical code lock, please contact Strnek customer service for troubleshooting assistance, parts, replacement, or refund.
For support, please refer to the contact information provided on the product packaging or the official Strnek website.
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