Technical Support Manual – 05/2015 Rel. 0
Page 12
8. SPECIAL VISUAL SIGNALS
The machine gives special visual signals in certain cases. The special visual signals are listed in table T8.1.
Table T8.1: Special visual signals
Signal
Meaning
Notes
Three dots lit on one or
both displays
Imbalance exceeds 999 grams.
This signal can be triggered due to:
•
Lack of machine calibration;
•
Incorrect measuring of the wheel dimensions;
•
Incorrect setting of the Wheel Type;
•
Incorrect setting of the Program Type.
Flashing green STBY LED
The machine is in the STAND-BY mode.
All LEDs and displays are switched off. To exit the
STAND-BY mode press any button
(except for [P7]
).
The left (or right) display
is flashing
a)
Waiting on the user's command;
b)
The Diameter or Width sensor is not
calibrated.
a)
The user's command may be the pressing a key
to confirm or continue the procedure in
progress or the selecting of a value or a menu
option.
9. TROUBLESHOOTING
Table T9.1: Troubleshooting table
Component
Problem
Cause
Solution
ENCODER DISC
•
It does not read all the positions (0 ÷
255).
•
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.
MACHINE
•
The machine does not switch on.
•
Fuse on socket.
•
Power supply.
•
Power board.
•
Check and replace the fuse.
•
Check and replace power
supply.
•
Check and replace power
board.
Table T9.2: Parameter reference values
Parameters
Values
Unit of measurement
Rotation speed
< 80
RPM
Pick-up signal A
70 ÷ 120
CPU-C1 internal unit
Pick-up signal B
70 ÷ 120
CPU-C1 internal unit
Frequency of the converter voltage-frequency
40.0 ÷ 45.0
kHz
Summary of Contents for MEC 1
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