iv
• Do not touch the heat sink and braking resistor because they become very hot.
Doing so could cause burns.
• The DC brake function of the inverter does not provide any holding mechanism.
Injuries
could
occur.
• Ensure safety before modifying the function code settings.
Run commands (e.g., "Run forward"
FWD
), stop commands (e.g., "Coast to a stop"
BX
), and frequency change commands
can be assigned to digital input terminals. Depending upon the assignment states of those terminals, modifying the function
code setting may cause a sudden motor start or an abrupt change in speed.
• When the inverter is controlled with the digital input signals, switching run or frequency command sources with the related
terminal commands (e.g.,
SS1
,
SS2
,
SS4
,
SS8
,
Hz2/Hz1
,
Hz/PID
,
IVS
, and
LE
) may cause a sudden motor start or an abrupt
change in speed.
• Ensure safety before modifying customizable logic related function code settings (U codes and related function codes) or
turning ON the "Cancel customizable logic" terminal command
CLC
. Depending upon the settings, such modification or
cancellation of the customizable logic may change the operation sequence to cause a sudden motor start or an unexpected
motor operation.
An accident or injuries could occur.
Maintenance and inspection, and parts replacement
• Before proceeding to the maintenance/inspection jobs,
turn OFF the power and wait at least five minutes for inverters
of 40 HP or below, or at least ten minutes for inverters of 50 HP or above
. Make sure that the LED monitor and charging
lamp are turned OFF. Further, make sure, using a multimeter or a similar instrument, that the DC link bus voltage between
the terminals P(+) and N(-) has dropped to the safe level (+25 VDC or below).
Otherwise, an electric shock could occur.
• Maintenance, inspection, and parts replacement should be made only by qualified persons.
• Take off the watch, rings and other metallic objects before starting work.
• Use insulated tools.
Otherwise, an electric shock or injuries could occur.
• Never modify the inverter.
Doing so could cause an electric shock or injuries.
Disposal
• Treat the inverter as an industrial waste when disposing of it.
Otherwise injuries could occur.
GENERAL PRECAUTIONS
Drawings in this manual may be illustrated without covers or safety shields for explanation of detail parts. Restore the covers and
shields in the original state and observe the description in the manual before starting operation.
Icons
The following icons are used throughout this manual.
This icon indicates information which, if not heeded, can result in the inverter not operating to full efficiency, as well as
information concerning incorrect operations and settings which can result in accidents.
This icon indicates information that can prove handy when performing certain settings or operations.
This icon indicates a reference to more detailed information.
Summary of Contents for FRENIC-MEGA
Page 36: ...2 6 Unit inch mm Refer to Section 2 3 3 9...
Page 356: ...MEMO...
