Cooling water pump keeps turning OFF and giving an Object Error

[Smoothcriminal]

Cooling tower pump keeps turning OFF and giving an object error.

This has happened 10 times since 7/5.

When the pump shuts off, there is reduced flow to the chiller condensers with potential protective shutdown of the chillers.

When the pump shuts off, there is significant water leakage from the shaft packings and a considerable volume of water is spilled on the pump room floor. Prior of this happening, we have been observing that the cooling tower pump discharge pressure has a very long response time to pressure changes, which indicates a fouled sensing line.

Any ideas on how to troubleshoot this issue?

 

[LittleInch]

Well to be honest not from a distance, without some plans, P&IDs, isometrics, pump curves, photos, description of operation, operating and control philosophy etc.

Some of it is probably terminology, e.g. what is an "object" error?
What error checking / trouble shooting / investigation have you tried already?

Why does the pump turn off - something must be telling the control system to stop? What is it?
how many pumps?
Leakage from the shaft packing sounds like seal failure / gland packing needs maintenance / replacement. But is this relevant to the pump trip?

My first step is usually to figure out how it is supposed to work and then figure out what is different / what is ACTUALLY happening. As much data as posisble when it is going - pressures, flows, levels, temperature, amps, any variable you can measure.

Then test instruments, valves etc, clean filters, sensing lines ( they don't often get fouled).

Give us something to go on and we can assist / make suggestions, but not on what is supplied at the moment. We can only see and know what you tell us and telepathy doesn't work over the internet in my experience.....

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[mk3223]

Can a P&ID with the control system be shared to understand why the pump was shut off?
Also, have you verified what's the start-up procedure which might be resulted in the slowly built-up of the pump discharge pressure?