Cormach MEC 10, Techbical Support Manual, Page: 36 / 39

Technical Support Manual – 05/2018 Rel. 2.1.3 Page 34
10. TROUBLESHOOTING
Table 10.1: Troubleshooting table
Component Problem Cause Solution
ENCODER DISC
•
It does not read all the positions (0 ÷
255).
•
The shaft does not stop rotating.
•
The shaft performs a ½ turn and then
stops.
•
Encoder disc dirty.
•
Encoder disc cable
interrupted.
•
Encoder board burnt.
•
Clean the encoder disc.
•
Replace the board and
then the cable.
PICK-UP SIGNALS
• The values displayed are too high.
• The values displayed are too low.
• The value displayed is 0.
The value of the signals must range
between
70 ÷ 110.
• Connection cable not
welded on the pick-up.
• Connection cable not
connected to CPU.
• Pick-up over compressed.
• Weld the cable to the
pick-up.
• Check the correct
connection of the pick-
up cable to the CPU.
• Remove the
compression springs and
make sure that the pick-
up moves freely.
DISPLAY
• One or more segments fail to switch
on. • CPU board burnt. • Replace CPU board.
KEYBOARD
•
One or more keys failed.
•
CPU board burnt.
•
Replace CPU board.
VFC
• The values displayed are too high.
• The values displayed are too low.
• The value displayed is 0.
• When knocking the machine the
values do not change.
The value of the VFC must range between
40.0 ÷ 44.0.
• Connection cable not
welded on the pick-up.
• Connection cable not
connected to CPU.
• Pick-up too compressed.
• Weld the cable to the
pick-up.
• Check the correct
connection of the pick-
up cable to the CPU.
• Remove the
compression springs and
make sure that the pick-
up moves freely.
SENSORS
•
The sensors fail to detect the wheel
dimensions.
•
Sensors deactivated.
•
Sensor cable interrupted.
•
Sensor board burnt (the
sensor calibration program
does not display the
calibration values).
•
Re-activate the sensors
(See paragraph 4
"PARAMETERS MENU
ACCESS").
•
Replace the interrupted
cable.
•
Replace sensor board.
MACHINE
•
The machine does not switch on.
•
Fuse on socket.
•
Power supply.
•
Power supply board.
•
Check and replace the
fuse.
•
Check and replace power
supply.
•
Check and replace power
board.
MOTOR
• Short-circuited motor. The fuse
blows upon activation of the motor. • Disconnect the motor from
the power board. • Replace the motor.
Table T10.2: Parameter reference values
Parameters Value Unit of measurement
Rotation speed 135 ÷ 145 RPM
Pick-up signal A 70 ÷ 110 CPU-C1C.X internal unit
Pick-up signal B 70 ÷ 110 CPU-C1C.X internal unit
Frequency of the converter voltage-frequency 40.0 ÷ 44.0 kHz