The error code, “SYSTEM STALLED” comes when your product water flow reading (measured by Rotoflo meter) is 0 when the system thinks it should be making water. After 1 minute of not making product water the system will “Restart” and try again. It will do this one more time before it reads, “SYSTEM STALLED.” This can be cleared by cycling power. Once power is back on you can bypass the purge process by tapping the Auto Store and Stop button simultaneously.
Quick things to check upon getting the alarm are:
a) Pressure Relief is Closed (if open, system will stall)
b) Intake through hull is open (if starved of water, system will stall)
c) Discharge through hull is open
A way to confidently check your flow is to open your pressure relief valve and flip the run manual toggle switch. You should see water discharging overboard.
d) Air getting into the system. The two easiest way to clear air from the system is to run the system with the pressure relief valve open for a minute or two. Performing a freshwater flush can also help.
e) Rotoflo (product flow meter) is disconnected thus providing a reading of 0 gph to the board. (if so, reconnect)
Before checking the more detailed troubleshooting methods below you should read and understand the “Manual Operation” section of your owner’s manual.
Other things to check when running the system in “Run Manual.”
*Jammed flow meter* – During normal operation, you should see the transparent flow meter spinning as fresh water is being made. If you have confirmed that you are making water but your flow meter is not spinning you can disassemble the flow meter and jump-start the propeller by blowing through it or turning it with a wire or paperclip. See bottom of page for photo.
*Motor/Pump not pumping* – Is your feed pump turning on? For this check adequate voltage at motor leads when the system run manual toggle switch is engaged. For systems with a speed controller (Catalina/Newport), check outer two output posts on speed controller (see Adjusting DC Motor Speed via PWMA for help identifying that if unfamiliar)
If you are making product water, have a spinning rotoflo meter, and have checked the wiring from the flow meter to the circuit board, your rotoflo must be malfunctioning and needs to be replaced.
NOTE: ONLY DISABLE THIS ALARM USING THE BELOW STEPS IF YOU ARE CERTAIN THE FAULT IS DUE TO A ROTOFLO FAILURE.
MPC: Once you have confirmed you are making water and this is a false alarm you can bypass this alarm on MPC 5000 systems by disabling the “AIRLOCK” in your system settings. You can follow the “Programming from the Display” section of your manual or view some tips from the below video
SPECTRA CONNECT: Menu > Fault Alarms > Check box next to system stalled to disable.