What are the common faults and solutions when debugging rolling doors?

Common faults and solutions when debugging rolling shutter doors
As a type of door widely used in commercial shops, garages, warehouses and other places, rolling shutter doors are favored for their convenience, safety and durability. However, during use, rolling shutter doors may have various faults that affect their normal operation. This article will introduce in detail the common fault phenomena and solutions of rolling shutter doors during debugging, helping you to quickly locate the problem and take effective solutions to ensure the stable operation of rolling shutter doors.

1. Power supply related faults
(I) Fault phenomenon: After the power is turned on, all functions of the rolling shutter door cannot be operated
Possible causes:
The wiring of the button box is loose.
The limit wiring is abnormal.
The control box circuit board is damaged.
The motor or contactor is faulty.
The main power fuse is burned out.
Solution:
Check whether the wiring of the button box is loose. If it is loose, re-tighten the wiring.
Press the button of the button box and listen for any sound. If there is a sound, check whether the limit wiring is normal; if there is no sound, further check the control box circuit board, motor or contactor.
Test whether the transformer input and output power are energized, and whether the motor terminals are energized. If the power is normal, press the contactor on the control box. If the motor moves, it may be that the control box circuit board is damaged and the circuit board needs to be replaced; if the motor still does not move, it may be that the motor or contactor is damaged and the corresponding parts need to be replaced.
Check whether the main power fuse is burned out. If it is burned out, replace the fuse and check whether there are short circuits in the circuit.
(II) Fault phenomenon: The power circuit breaker cannot be pushed
Possible reasons:
The spare board is faulty.
The motor brake is burned out.
Solution:
Check whether the output line resistance of the spare board is normal (about 300 ohms). If it is open or short-circuited, check whether the motor brake is burned out or the spare board is burned out, and replace it accordingly.
II. Control-related faults
(I) Fault phenomenon: Control box alarm
Possible reasons:
The power supply is missing phase or the phase sequence changes.
Abnormal voltage.
The motor line connection is loose.
Solution:
Check whether the power supply is missing phase, whether the phase sequence changes, and whether the voltage is normal. If there is a problem, adjust the power supply or fix the voltage problem.
Check if the motor wire connection is loose. If so, re-tighten the connection.
(II) Fault phenomenon: The rolling door cannot be opened or closed
Possible causes:
Power failure, such as the power cord plug is not plugged in tightly, circuit break, etc.
Controller failure.
Protective device is triggered, such as obstacles around the door body.
Solution:
Check if the power cord is plugged in tightly and if there is a circuit break. If a problem is found, re-plug or replace the power cord.
Check if the controller is damaged or faulty. If damaged, replace the controller.
Check if there are obstacles around the door body. After removing the obstacles, try to operate the rolling door again.
(III) Fault phenomenon: Remote control failure
Possible causes:
The remote control battery is exhausted.
The remote control and the rolling door are not synchronized.
Control circuit failure.
Solution:
Try to replace the remote control battery first to see if normal operation can be restored.
If it still cannot be used after replacing the battery, try to resynchronize the remote control and the rolling door. For specific operation methods, please refer to the instruction manual of the rolling door.
If the above methods are ineffective, it may be that the control circuit is faulty and you need to contact professional maintenance personnel for inspection and repair.

III. Mechanical related failures
(I) Fault phenomenon: Rolling door track is not aligned
Possible causes:
Frequent use or collision causes the track to loosen or deform.
Solution:
Check whether there are loose screws on the track. If so, tighten the screws.
Clean up the debris or debris on the track to ensure that the track is unobstructed.
If the track is severely deformed, disconnect the door from the door opener and readjust the guide rail to ensure the correct gap.
(II) Fault phenomenon: Rolling door is stuck
Possible causes:
Foreign objects are stuck between the door body and the track.
Mechanical parts are worn or damaged.
Solution:
Check whether there are foreign objects stuck between the track and the door body. If there are foreign objects, clean them up in time.
Check whether mechanical parts are worn or damaged, such as chains, gears, etc. If wear or damage is found, the corresponding parts need to be replaced.
(III) Fault phenomenon: The rolling door makes an abnormal sound when in operation
Possible causes:
The motor parts are damaged or aged.
The track is damaged, rubbing against the door body or loosening.
The transmission device is faulty, such as the transmission chain or belt is loose or worn.
Solution:
Check whether the motor is operating normally. If there is any abnormality, the motor parts or the entire motor need to be replaced.