Torex VDC Series - Check-List in Case of Fault

2 - Operation and maintenance
39
TO320 M - EN - Ed. 04.09
CHECK-LIST IN CASE OF FAULT 17.
1) General questions
Description of problem
a) Does the VDC start up without problems after long shutdowns?
b) Do the atmospheric conditions seem to contribute to the problem?
2) Checking the electrical part
a) Are supply current variations possible because a number of machines are started up at the same
time?
b) Is the plant equipped with a current generator?
c) Check to make sure the motor receives power!!
d) Check to make sure the motor is connected correctly and that the wires are xed correctly to the
terminals!
e) Check the setting of the motor thermal cut-out switch in the main distribution board and compare
with the data on the motor plate!
f) Check the power input of the motor without load, at breakaway current and when the VDC is op-
erating at full speed!
g) Check to make sure the power cables cross-section is suited for the power installed!
3) Checking the mechanical part
a) Make sure the outlet spout is free of encrusted material which can reduce the spout cross-section.
Describe the condition of the outlet spout.
4) Checking the pneumatic part
a) Is air present in the pneumatic panel?
b) Is air present in the cylinders?
c) Is the supply pressure greater than 3 bar?
5) Checking the product
a) Product description?
b) Density? (kg/dm3)
c) Granulometry? (µm/mm)
d) Moisture? (%)
e) Flowability? (make the material ow on a sheet increasing the slope gradually)
f) Compressibility? (is it possible to form a “snowball”?)
g) Abrasiveness? (does it hurt when the product is rubbed between the ngers?)