CG Drives & Automation 01-7492-01r1 Troubleshooting, Diagnoses and Maintenance 195
12.2.1 Technically qualified
personnel
Installation, commissioning, demounting, making
measurements, etc., of or at the AC drive may only be
carried out by personnel technically qualified for the task.
12.2.2 Opening the AC drive
The connections for the control signals and the switches are
isolated from the mains voltage. Always take adequate
precautions before opening the AC drive.
12.2.3 Precautions to take with a
connected motor
If work must be carried out on a connected motor or on the
driven machine, the mains voltage must always first be
disconnected from the AC drive. Wait at least 7 minutes
before continuing.
12.2.4 Autoreset Trip
If the maximum number of Trips during Autoreset has been
reached, the trip message hour counter is marked with an
“A”.
Fig. 154 Autoreset trip
Fig. 154 shows the 3rd trip memory menu [830]:
Overvoltage G trip after the maximum Autoreset attempts
took place after 345 hours, 45 minutes and 12 seconds of
run time.
WARNING!
Always switch the mains voltage off if it is
necessary to open the AC drive and wait at
least 7 minutes to allow the capacitors to
discharge.
WARNING!
In case of malfunctioning always check the
DC-link voltage, or wait one hour after the
mains voltage has been switched off,
before dismantling the AC drive for repair.
810 0rpm
Ext trip
A2020-05-05 14:25:02
Sby Rem/Rem
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