Chiller troubleshooting

Ok, so different source, but technically the same issue driving the breaker trip. The breaker is tripping to save your gear, and the amp imbalance (?) is suggesting to the breaker it should respond. My amps only went up perhaps 3 or 4 on one side, and stayed below the breaker threshold. But it tripped, and the driver of the trip was the higher operating temp of the compressor.

...and I'm telling you this as much as I'm asking, learning here. My issue was very similar to what you're explaining, it seems, and mine was temp driven by buildup on the coils. Your temp issue is driven by a pump...right?

...but in the end I think you'll find that your breakers are fine, guilty of doing what they were designed to do. Mine as well.

Shut chiller #3 off and that will load 1+2 if it's overcast tomorrow......

Sorry for the delayed reply..what is the leaving water temp out of the chillers? The delta T across chillers is important..sorry mapism,between my dyslexia and your accent..

And all three coils are reading the same, all three coils sit on the same plane of installation?

Two degrees can be the difference if already stressed by hot seasonal water. Only one unit is tripping?

I'm still in the camp staring at your coils and saying clean them and backflush them for possible blockage buildup. I might be alone in that camp, but that's my experience. I'd hook up a hose to your discharge port on the manifold, a hose on the input port, introduce a pump to your hose to the discharge side, and start pumping RedLine coil cleaner or similar backwards into and back out of the bucket, watching for sediment and debris. I'd run that cycle for an hour, then reconnect the discharge side and pump fresh water through and out. Likely I'd shut down the intake and soak the sea strainer at the same time I'm doing all of this.

Temp leads to amp creep, and amp creep trips these breakers.

I think you have a weak circuit breaker. Generally if a pump doesn't have adequate flow it will happen right away, or you'll get high pressure readings.

Pascal, those holes are to let air out of the pump volute when shut on and off..many manufacturers put them in general purpose style pumps so pumpsbdont get airlocked on start..minimal performance loss.. so I am unsure if you have chilled water or freon going to the actual airhandlers in the boat..the Temps you give are for the seawater heatexchangers yes?

Ok so what have the entering and leaving Temps been to the airhandlers?

If you don't have IR temp scanner, how about head pressures while operating ?