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Troubleshooting Q&A (Sliding Door Closer)

Q: The door does not fully close.

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A: Some part of door, hanger or other components may be in contact with the top cover or door pocket.

Action: Check the point of contact and then adjust or reinstall the hanger(s)/guide roller for correcting the position and make sure there is no contact against the top cover or door pocket.

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A: The guide roller may be in contact with the top surface of the guide rail (bottom of the door) so that the door does not move smoothly.

Action: Raise the door by adjusting the hanger bracket or even move the rail location up if more clearance is needed.


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A: The door may be not perpendicular (vertical) to the floor and therefore the door may be tilting/leaning away from the wall.

Action: Reinstall the hanger(s) and/or guide roller to make sure that the door becomes perpendicular to the floor.


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A: There may be dusts, obstacles or damage on the hanger roller or the surface of rail.

Action: Clean hanger roller/rail or replace them if necessary.


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A: The hanger(s) may not be installed parallel to the rail and the hanger roller is not rolling in-line on the rail correctly.

Action: Adjust or reinstall the hanger(s) and make sure that the roller becomes in-line to the rail.

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A: The control device may not be set up correctly (weak spring strength) and the system may be braking too strongly.

Action: Turn the speed adjustment dial on the control device counterclockwise and adjust the braking speed correctly.

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A: (For Horizontal Type) The pull spring device may not be set up correctly.

Action: Adjust the spring force of pull spring device and set it to suitable tension.

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A: The clutch gear of the control device may be engaged too strongly to the rack.

Action: Adjust the height of rack within allowance of screw hole.

Q: The door does not fully close or closing motion is not smooth/steady.

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A: There may be friction/resistance against door from some object between the door and the frame (such as an airtight rubber, mohair etc.)

Action: Reduce the friction by modifying the object (changing material, shape, size etc.)

Q: The door makes rattling noise.

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A: Check the conditions of mounting screws for all components.

Action: Tighten any loose screws.

Precautions for preventing accidents

1. Use the product only with suitable door size, weight, material and location as specified in this catalog.

2. In case the control device fails, the door may close fast increasing risk of accident, such as finger pinch, collision, tripping etc… If you observe a malfunction of braking performance due to an oil leak or parts breakage, please replace the product/part immediately.

3. Do not disassemble or modify the product. Any product dismantled/modified shall not be subject to manufacturer's warranty.

4. Make sure that all of the mounting screws are securely fastened. Loose or damaged screws may cause product failure or accident.

5. Be sure to install the anti-bounce brackets. Failure to observe this instruction may result in derailing of hangers or tripping of door.

6. Be sure to install the door stopper at the door back end.

7. Do not drop or strike any of the components. Failure to follow this precaution may cause a fault in operation.

8. While the door is being closed automatically by this product, do not close the door by hand too strongly. Excessive closing force may cause door to close too rapidly and result in accident.

9. Do not hang on to the door or rail.

10. In case the door hits the standard door stopper too strongly, install additional door stopper at the door back end or on the floor.

11. Do not pull out the wire and abruptly release your hand, otherwise the wire would be too strongly rolled back and get jammed/bent inside. (If the wire gets damaged, it would no longer be properly pulled or retracted. Once this happens, please replace the pull spring device.)



Precautions to be taken to ensure a long service life

1. Wipe off dust from the rail and rollers periodically.

2. Check the condition of product periodically and make sure all components are securely installed and properly working.