What to do when a hard fast door fails?

What to do when a hard fast door fails?
Hard fast doors are widely used in industrial plants, logistics centers, clean workshops and other places because of their durability, fast opening and closing, and good thermal insulation performance. However, due to their high frequency of use and complex working environment, some faults occasionally occur. When a hard fast door fails, you can follow the steps below to troubleshoot and deal with it:

I. Common faults and solutions
(I) Power supply problem
The power supply is not connected: Check whether the power plug is off, whether the power switch is turned on, and whether the circuit fuse or circuit breaker is normal.
Unstable voltage: Measure whether the power supply voltage meets the rated voltage requirements of the door body, and use a voltage stabilizer if necessary.

(II) Control circuit failure
The control circuit is short-circuited or open-circuited: Check whether the internal wiring of the control box is intact and whether there is a short-circuit or open-circuit.
Limit switch failure: The limit switch contacts are blocked or the position is improperly adjusted, resulting in the door body being unable to reach the predetermined position.
Solution: Check whether the limit switch contacts need to be polished or replaced, and adjust the position of the limit switch.
Relay failure: The relay coil is damaged or the contact is oxidized and contaminated, resulting in failure to work properly.
Solution: Replace the relay or polish the contact.

(III) Mechanical component damage
Slider or nut damage: The slider or nut cannot rotate with the screw, resulting in the door body being unable to rise.
Solution: Add lubricating oil to try to solve the problem. If it does not work, replace the damaged parts.
Door track deformation: Track deformation will affect the normal operation of the door body.
Solution: Correct the track or replace a new track.
Drive device failure: If the motor is damaged or the transmission gear is severely worn.
Solution: Check whether the motor is working properly, replace the motor or repair the transmission parts if necessary.

(IV) Safety protection device triggering
Safety sensor failure: The safety sensor is blocked or damaged, resulting in misjudgment of the control system.
Solution: Clean the sensor surface to ensure that the light is not blocked. If damaged, replace it.
Airbag triggering: The airbag is triggered by encountering an obstacle, and the door body automatically stops or runs in reverse.
Solution: Clear the obstacle, check whether the airbag is damaged, and replace it if necessary.

(V) Other common faults
The emergency stop switch is not rotated out: The emergency stop switch of the lifting door needs to be manually rotated out before it can be used normally.
Poor power contact: Check the wires of the control system and check the power contact.
Insufficient battery power: Just replace the battery in time.
Exceeding the sensing range of the remote control: The sensing range of the remote control is within 50 meters. Using the remote control to control the switch within the specified range can operate normally.
Sensor failure: Hard fast doors are usually equipped with infrared or radar sensors to detect whether there are objects blocking the opening and closing of the door during movement. If the sensor fails, the door will not work properly. At the same time, the sensor may also be affected by dust or other contaminants and needs to be cleaned in time.
Motor failure: The roller shutter of the hard fast door is driven by a motor. If the motor fails, the door will not work properly. Usually the motor failure may come from the looseness of the drive chain, resulting in the roller shutter not being able to fully retract and penetrate.
Switch failure: The hard fast door needs to be opened and closed through the control system. In this process, the switch plays an important role. If the switch fails, the door will not respond to the command.
Door deformation: The door body of a rigid fast door is usually made of hard materials, but during use, it may be hit, causing the door body to deform, which in turn affects the opening and closing of the door.
Excessive wind pressure: Rigid fast doors installed outdoors may face excessive wind pressure. If the door does not have sufficient wind resistance, it may cause the door body to fold and deform.

2. Maintenance and care
Regular inspection: Regularly check the operating status of the door body to ensure that all components are working properly.
Lubrication maintenance: Regularly add lubricating oil to moving parts to reduce wear.
Cleaning and maintenance: Remove dust and debris around the door body and keep the sensor clean.

3. Professional maintenance service
If the above methods cannot solve the problem, it is recommended to contact a professional maintenance service team for inspection and repair. During the warranty period, you can choose the brand’s after-sales service to obtain professional technical support and warranty services.

4. Summary
When a rigid fast door fails, it can be checked according to several aspects such as power supply problems, control circuit failures, mechanical component damage, and safety protection device triggering. Most problems can be solved by one-by-one inspections and simple maintenance operations. For any uncertain issues, be sure to contact professionals for diagnosis and repair to ensure the safe and stable operation of the door.