Pump Running Time Limit Exceeded

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In a Multipump system, one or more pump running time counters have exceeded a user-specified alarm or fault limit. This indicates that a pump has reached its programmed maintenance interval or has been operating for an excessively long period without intervention. Timely maintenance prevents wear and premature failure.

• Maintenance interval parameter (e.g., P7-10 for run time limit) set too low for the actual pump operating schedule or expected service life.
• Incorrect sequencing logic or pump rotation strategy causing one pump to accumulate significantly more run hours than others in a multi-pump system.
• Failure to reset the pump run-time counter (e.g., P7-11) after scheduled maintenance, leading to premature limit triggering.
• Increased demand on a specific pump due to operational changes or system imbalances, resulting in it running more frequently or longer.
• Fault in the pump's control circuit causing it to run continuously or more often than commanded, accumulating excessive hours.

Klikk på steg for å spore fremgangen.

1. 1

   1. Retrieve the current run-time counter value for the affected pump (e.g., P7-11) and compare it to the set limit (e.g., P7-10).

2. 2

   2. Review the pump sequencing parameters and rotation strategy (e.g., P7-05, P7-06) to ensure balanced operation across all pumps.

3. 3

   3. Evaluate if the run-time limit parameter (e.g., P7-10) is appropriate for the pump type, application, and planned maintenance schedule.

4. 4

   4. If maintenance has been performed, manually reset the pump's run-time counter (e.g., P7-11 set to 0) as per the system's maintenance procedure.

5. 5

   5. Monitor the pump's operational status and command signals (e.g., digital output to contactor) to verify it is running only when required by the system.