What to Do if the Fire Pump Starts Unexpectedly

In fire protection systems, a fire pump is a critical component designed to activate during emergencies. However, if your fire pump starts unexpectedly without a fire event, it could signal an issue that needs immediate attention. Here's what you should do to diagnose and resolve the situation.

Step 1: Stay Calm and Prioritize Safety

If the fire pump turns on without warning, do not panic. Ensure the immediate area is safe. Check if there's an actual fire or sprinkler system activation before proceeding to troubleshoot the pump.

Step 2: Check for System Activation

Sometimes, a minor pressure drop in the fire protection system — like a leaking valve or a broken gauge — can cause the fire pump to start. Inspect the sprinkler system, valves, and pressure maintenance devices for any anomalies.

Step 3: Inspect the Jockey Pump

A jockey pump maintains pressure in the system. If it fails or is improperly set, the main fire pump may start unnecessarily. Verify that the jockey pump is operational and correctly adjusted to maintain the system pressure.

Step 4: Examine the Pressure Switches

Pressure switches are responsible for signaling the fire pump to start and stop. Malfunctioning or incorrectly calibrated pressure switches could trigger an unexpected start. Testing and recalibration might be necessary.

Step 5: Review the Control Panel Alarms

Modern fire pumps feature control panels that provide fault or event histories. Review these logs to gather insights into what caused the activation. This can help identify electrical faults, sensor issues, or communication errors.

Step 6: Inspect for Air Entrapment

Air trapped in the piping can cause false pressure readings, leading the pump to activate. Bleed the system to ensure that all air is removed and the pressure readings are accurate.

Step 7: Contact a Professional

If you cannot easily determine the cause, it's best to consult a qualified fire pump technician or your manufacturer’s support team. Quick professional intervention can prevent system damage and ensure compliance with fire codes.

Step 8: Document and Report the Incident

Keep a detailed record of the event, including the time, conditions, findings, and actions taken. This documentation is crucial for insurance purposes, system audits, and future maintenance improvements.

Conclusion:
An unexpected fire pump start is a warning sign that should not be ignored. Regular inspection, maintenance, and professional servicing are key to ensuring your fire pump operates only when needed — protecting property and lives effectively.