66
MCTC manual
10
Trouble shooting
Problem:
The dosing system does not come into specification or a Maximum deviation alarm occurred.
Possible causes:
1.
Check if all cables are connected correctly.
2.
Check if the hopper assembly is fixed tightly to the weighing platform and that the neckpiece is fixed
tightly to the production machine.
3.
Check if the dosing tool is tightly fixed to the motor shaft.
4.
Excessive build-up of material on the dosing tool may have impact on proper dosing.
To avoid this, be sure that the seals and dosing cylinder are clean.
5.
Check if there is no tension on the cables connected to the weighing platform.
6.
Use the weight check function with the reference weight to determine the correct function of the
weighing system.
7.
If the weight check gives the correct result, check if the material flow into the dosing tool has been
blocked.
8.
Another cause may be an obstruction to the weighing system. Check if there is at least
1mm space
between all the pointed safety screws and the load cell frame or platform and that there is no material or
dirt blocking the movement.
9.
In case of a water cooled neckpiece, check if there is material build up around the dosing cylinder and
the water cooled pipe that can obstruct the free movement of the weighing system.
10.
Check if the input signal is stable.
11.
If none of the above causes the problem, recalibrate the system and try the weight check again.
Problem:
The dosing system does come into specification but seems to be slow.
Possible causes:
1.
Extreme vibrations and shocks to the system.
2.
Extreme low Set point. See chapter: System performance
.
3.
Check in case of use of an automatic hopper loader if the hoses are connected in the right way.
Problem:
The input/start-signal is connected but the unit does not recognize this start signal.
Possible causes:
1.
Check if the correct wires are connected for potential free contact, potential contact or tacho. Also check
if the + and
–
side are connected correctly.
2.
Automatic fuse is activated, this can for example happen when there was a short-circuit at the input
connection. To deactivate the automatic fuse the controller needs to be switched OFF for a while and ON
again, but first check and repair the short-circuit.
Problem:
The hopper weight is not stable.
Possible causes:
1.
Check if the weighing signal is not influenced by external circumstances, for example that the load cell
cable passes near to electromagnetic fields or electro motors.
2.
Extreme vibrations and shocks to the system.
3.
Check if there is no obstruction to the weighing frame.
4.
Check in case of use of an automatic hopper loader if the hoses are connected in the right way.
Problem:
USB copy function does not work properly.
Possible causes:
1.
Some brands of USB memory sticks are not correctly detected by the MCTC. Please try another brand of
USB memory stick.
2.
The USB memory stick is not properly formatted, be sure the USB memory stick is formatted FAT32.
3.
If the USB menu can be opened without USB memory stick, please press “Remove USB stick” and insert
USB memory stick again.
