Automatic door common spurious faults diagnosis & debugging

Here we are going to discuss automatic door’s spurious faults, which are mainly caused by external factors, instead of automatic door operators’ components themselves. If the operator goes wrong due to parts’ malfunction, we absolutely should go for original vendor support or seek for professional automatic door service. If it’s a spurious malfunction, some time we can fix it by ourselves.

Scene 1: Automatic sliding door not moving.

1. Is power on?
   If not, turn it on.
2. Are the door panel edge scratching the ground?
   (There is a bigger resistance at starting if the door panel improperly fixed, the automatic door controller will consider the abnormal force as a fault and stop automatically to protect itself.)
   Go for an automatic door service if necessary.
3. Are the trolleys or carriages off from the track?
   Make sure the wheels are running on their right place and straightly aligned.

Scene 2: Automatic door repeating open and close.

1. There are active objects getting into detecting range of automatic door sensor.
   (e.g. pedestrians, vehicles, waving flags or even the tree’s shadows will disturb the sensor)
   Keep the active objects away from entering sensor detecting range or lower the sensibility of the sensor.
2. The angel of radar sensor is not properly set.
   (A doppler radar component in the sensor was designed to be rotatable for various triggering condition. If the angel was set too much downward, the sensor probing range overlapped door sliding path, when the door is closing, the sensor will detect the door’s movement and open again.)
   Open the sensor cover, turn the radar angel a little bit upward.
3. The beam or automatic door opener’s cover vibrate when the door is moving.
   (In this case, the sensor which is installed on the beam or opener’s cover might jog together with it and causes unusual door’s open and close.)
   Reinforce or stabilize the structure, eliminate vibration (Alternatively, an unidirectional detect sensor can be applied to ignore the door vibration) 

Scene 3: Abnormal noise at door sliding (Mostly happens on ageing automatic doors)

1. Carriage/trolley is worn because of years’ running.
   If the abrasion is mild, try to clean the rail and wheels, and apply a little bit lubrication oil on the bearing (Do not apply oil on the rail, rubber toothed belt and plastic wheels, it will gather more dust and cause worse abrasion).
   If the abrasion is serious, have automatic door service provider to replace it.
2. Some hardware’s bolts are loose.
   Re-tighten them.
3. Floor guide is damaged.
   Replace it.
4. Noise occurred because of unwanted contact and scratches between moving panel and fixed panel.
   Have a technician to adjust the frame.
5. Due to improper construction, the upper beam and roofing have a resonance circumstance.
   Ask for help from a professional engineer.

Scene 4: The sliding door panels action slow.

1. Senor detecting range is too narrow or sensibility is weak.
   Adjust the radar angel and increase the sensitive level of the sensor.
2. Too much dust inside the sensor.
   Open the sensor cover, clear it with air-blowing.
   
3. Door panel is too heavy, exceeds the automatic door motor maximum force.
   Consulting a professional automatic door service provider.