Common failures in access control systems (ACS)

An access control system consists of several key components, each of which requires attention during operation. Below is an overview of typical malfunctions and advice on how to identify and prevent them.

Access Controllers

The controller manages access authorization logic. Although it’s generally reliable, malfunctions can occur for various reasons. To reduce risks:

1. Use an uninterruptible power supply (UPS) — voltage spikes can damage the electronics.

2. Periodically clean dust and check the enclosure for tightness.

3. Prevent unauthorized access to the system — maintenance should be performed only by trained professionals.

Readers

Readers typically operate stably but may fail due to improper use:

1. Moisture ingress causes contact corrosion and device failure.

2. Physical damage — impacts and rough handling are frequent causes of malfunction.

Cabling Infrastructure

Communication line damage most often occurs during construction or renovation. This can result in loss of connectivity between devices.

• It’s essential to coordinate repair and construction activities with ACS maintenance staff.

• Protective conduits or tubing can help avoid accidental damage.

Turnstiles

Turnstiles are the most vulnerable mechanical part of ACS:

1. Mechanical wear due to high foot traffic.

2. Physical force applied to locked arms — one of the most common reasons for failure.

3. Control panel failure or disconnected signal cable also lead to issues.

4. Use in high-humidity environments causes corrosion and unstable performance.

Repair Recommendations

1. Run diagnostics before replacing components. Avoid blind replacement — identifying the root cause is essential.

2. Check connections and power lines. Many malfunctions are due to oxidized contacts or damaged cables.

3. Keep technical documentation on hand. This simplifies troubleshooting and sourcing replacement parts.

4. Use original spare parts whenever possible. Low-quality substitutes may worsen the issue.

5. All repair work must be carried out by certified technicians. Unauthorized repairs often cause new malfunctions or void warranties.

A professional approach to repair and timely troubleshooting extends the life of the access control system and helps avoid costly equipment replacement.

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