[NAME]  On the 2018 H60, the pump is SATA powered, so there is no way for the PC/BIOS/AWCC to change the speed settings for the pump.  The tach connection is 3PIN but 1 wire (so 1 PIN).  All it does is report RPM, the PC can't change anything on the pump via voltage regulation because the power wires are connected to the PSU, not the header.  The OEM fan is around 4500 RPM, but the pump maxes out at 4000.  That's why it is showing 90%.  On older revisions it would do that with the OEM pump too (show 90%), but then they did a bios update for some systems to change it to "pump running".  So plug the 1 wire into the CPU fan header and you're all set.  As an aside, I think that's what the instructions on the Corsair manual state too (in older models you'd have to disregard the Corsair instructions and plug it into the Pump fan header like you noted.). 
Hello. Thanks in advance for any help.  Background: PC System Builder with 30+ years experience.  Issue: error 2000-0511 CPU FAN error on boot every time.  System Changes: upgraded OEM liquid CPU cooler to Corsair H60 in push/pull, with ML120 Pro no LED & no RGB.  Pump is SATA powered. Radiator fans (the 120s) into Noctua NA-SYC1 Y-splitter, plugged into TOP FAN.  H60 3pin tach plugged into PUMP FAN.  Factory VRM heatsink installed.  Hypothesis: BIOS/mobo isn't seeing VRM heatsink installed or BIOS/mobo doesn't like 3pin tach connection from pump - so system expects a CPU FAN connection (which is currently unused, by design). Any thoughts? Thanks again. 
Aurora R11, VRM heatsink, H60 (2018) error 2000-0511 CPU FAN error on boot