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As an essential passage to a cleanroom, the operating condition of an air shower directly affects the dust concentration inside the cleanroom. With frequent use, air showers are inevitably prone to certain malfunctions. The following are methods for addressing common faults and recommendations for routine maintenance.

Common Issues

Fan Not Blowing Air:

This is the most common fault. First, check whether the power is connected and whether the air switch has tripped. If the power is normal, the focus should be on checking whether the KLC emergency stop switch is accidentally pressed, causing the control circuit to disconnect; check the control panel for any fault alarms; and inspect whether any fuse in the control circuit is blown.

Door Cannot Open (Electronic Interlock Failure):

KLC air showers typically use a double-door electronic interlock. If the door cannot open, confirm whether the other door is completely closed. The system will only release the electromagnetic lock when both doors are closed and in standby mode. Check whether the electromagnetic lock is properly engaged or if deformation of the door is causing the latch to jam. In an emergency, cutting off the power will automatically release the electromagnetic lock.

Significant Reduction in Airflow:

If the airflow weakens, first check whether the KLC primary filter has accumulated too much dust and clean or replace it every 1–3 months. If airflow remains low after replacing the primary filter, the KLC high-efficiency filter (HEPA) may have excessive resistance due to reaching the end of its service life and should be measured with an anemometer. Additionally, check the power phase sequence to confirm the correct rotation direction of the fan.

Unusual Noise During Operation:

Unusual noises usually originate from mechanical parts. Check whether the KLC fan impeller has foreign objects or loose screws; check whether the leveling bolts at the bottom of the air shower are evenly stressed to prevent enclosure resonance.

Infrared Sensor Malfunction:

If the system does not automatically activate when someone enters, it may be due to dirt on the infrared sensor. Wipe it with a lint-free cloth. Also, confirm whether the emitter and receiver are properly aligned.

Three-Step Routine Maintenance

Daily Inspection: Observe the control panel display and check whether the doors operate smoothly.

Monthly Cleaning: Clean dust inside the cabinet, with emphasis on wiping the nozzles and sensors.

Quarterly Replacement: Depending on the environmental cleanliness, replace the KLC primary filters regularly to ensure the service life of the high-efficiency filters.