AEC 1-Pump 1-Station Controller - Manual (Page 24)

1 –Pump 1-Station Controller Chapter 6: Troubleshooting 23 of 30
Vacuum leak in the system. Find the leak and repair it.
Filter in filter chamber is plugged. Clean thoroughly; replace if
worn.
Material receiver filter is plugged. Clean thoroughly; replace if
worn.
Blower is dead-headed. Check the blower inlet for
obstructions.
Valve(s) not seating properly. Service valve(s).
Vacuum conveying rates
decline.
Low air pressure. Verify minimum of 80 psi
(551.6 kPa/5.52 bars) supply air
pressure.