AEC Continuous Vacuum/Pressure Conveying Systems - Manual (Page 56)

Single- and Dual-Blower Continuous Vacuum/Pressure Systems Page 55
7 Troubleshooting
When a problem is based on a pilot light, check the light bulb before performing one of these
corrective procedures.
Problem Possible cause Corrective action
The disconnect switch at the
machine or in the power drop is
open (de-energized).
Close (energize) the switch.
The fuse(s) in the power drop
disconnect switch have opened.
Replace the fuse(s).
Main fuse has opened. Replace the fuse(s).
The airlock motor starter has not
energized.
Refer to the next section below.
The logic power supply is faulty.
Repair or replace the power
supply as required.
The step-down former (1T) is
faulty.
Repair or replace it as required.
The “Power On” pilot light (3LT)
does not come on when Start
(2PB) is pressed.
The motor overloads have taken
the motor(s) off-line. Check wiring integrity and amp
draw. Reset the overloads.
The motor overloads have taken
the motor(s) off-line. Check wiring integrity, reset the
overloads, and verify amp draw.
The main fuse has opened. Replace the fuse.
The contact from the auto
shutdown module has opened. Once the unit has completely
shut down, it may be restarted.
The blower or airlock motors do
not run.
The motor starters are faulty.
Repair or replace them as
required.
On vacuum units, filters in the
filter chamber are too dirty.
Clean the filters according to
the instructions in the operating
literature.
Continuous cleaning
filter/receiver has dirty filters or it
is not operational.
Refer to enclosed manual or
contact Service Department.
Material line is plugged because
too much material is being
conveyed by blower.
If the takeoff device cannot be
adjusted, install a valve on a T
of the material line and open it
to supply some of the air
requirements of the blower.
Air leaks in the material line.
Check joints and connectors;
seal leaks.
Vacuum conveying rate drops
off.
Vacuum vent valve or Kunkle
valve is out of adjustment. Check and adjust vacuum vent
valve or Kunkle valve.