A Warning message in AFT Fathom alerts users to issues in the model that will affect the model results. These warnings often offer important information about the converged solution or the model itself, and should always be reviewed before considering the results to be meaningful for the system.

WARNINGS

• Cavitation may exist at Junction X

• Chempak temperature and/or pressure is out of range for the following

• Control valve open percentage outside valid range of 0-100% at Junction X 

• Energy may not be balanced at Junction X

• FCV could not control flow at Junction X

• Flow may not be balanced at Junction X 

• Flow is into system at Reservoir Junction X...

• Flow rate at drop off point at Junction X

• GSC Goal may not be valid. User goal = X. Final goal result = Y

• HGL, EGL and head loss results may not be meaningful for variable density systems.

• Junction X %BEP (Y%) is above/below the POR range

• Junction X Exceeded Runout Flow Rate...

• Junction X flow (Y gal/min) is above/below the AOR range (Z gal/min)

• Junction X Has Insufficient Pump NPSH/NPSP...

• Junction X Pump Added Negative Pressure

• Pipe X temperature is equal to or greater/less than the maximum/minimum temperature limit of...

• PRV could not control pressure at Junction X

• PSV could not control pressure at Junction X 

• Static pressure lower than vapor pressure at inlet/outlet of pipe/junction X

• Temperature at inlet/exit of pipe X is above/below max/min fluid temperature range

• Temperature is above the saturation line for the following. . .

• Transient data was extrapolated at Junction X

• Unique solution not possible - Relief valve cycles