December 2021
Service Manual
MDE 252 Rev. 1
Troubleshooting
22
Section 2: Troubleshooting
2.3.4 Warning on Local Display: Main Voltage (Near to Limit)
Main voltage lower than –15% or higher than +10% of the value stated in the
nameplate menu.
1. Check main voltage supply and frequency on terminals L1, L2 and L3.
2. Check current of motor and verify that wires section is correct.
3. Check internal wiring between terminal board and power supply module.
4. When main supply return in the correct range the warning disappears.
5. If main voltage, wires, current are correct it is necessary to recalibrate the
voltage sensor.
6. Enter in the RESTRICTED menu by the service password and set the new value of
the parameter "voltage span".
7. If also the above check does not resolve the problem could be in TV transformer
on the power card or in the cable between power module and control module.
It needs to change the power module/control module.
2.3.5 Warning on Local Display: Contactor Cycles
The contactor has reached the maximum number of cycles. The power card that have the
contactors on board should be changed as soon as possible.
2.3.6 Warning on Local Display: Maintenance Request
The date for the scheduled maintenance has expired. It needs to carry out maintenance
operation and then to set the next maintenance date in the MAINTENANCE menu,
maintenance date, (see Installation, Operation and Maintenance Manual, VCIOM-08500).
2.3.7 Warning on Local Display: Wrong Stroke Limit
The function that controls the end of travel limits detects a wrong end of travel condition.
It needs to recalibrate the stroke limits (see Installation, Operation and Maintenance
Manual, VCIOM-08500).
2.3.8 Warning on Local Display: BUS
The function that the BUS detects no message within xed time. Check bus messages.
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