4-2
(3) Check for loose terminals, connectors and screws.
(4) Check that the motor is separated from mechanical equipment.
(5) Make sure that all switches of devices connected to the inverter
are turned OFF. Powering on the inverter with any of those
switches being ON may cause an unexpected motor operation.
(6) Check that safety measures are taken against runaway of the
equipment, e.g., a defense to prevent people from access to the
equipment.
Figure 4.2 Connection of Main Circuit Terminals
4.1.3 Powering ON and checking
• Be sure to mount the front cover before turning the power ON. Do not remove the cover when the inverter power is ON.
• Do not operate switches with wet hands.
Otherwise, an electric shock could occur.
Turn the power ON and check the following points. The following
is a case when no function code data is changed from the factory
defaults.
(1) Check that the LED monitor displays
*00
(indicating that the
reference frequency is 0 Hz) that is blinking. (See Figure 4.3.)
If the LED monitor displays any number except
*00
, press
/ key to set
*00
.
(2) Check that the built-in cooling fans rotate.
(Inverters with a capacity of 1.5 kW or below are not equipped
with a cooling fan.)
Figure 4.3 Display of the LED Monitor after Power-on
4.1.4 Switching between HD, MD and LD drive modes
The FRENIC-MEGA series of inverters is applicable to three ratings--high duty (HD) for heavy load applications, medium duty
(MD) for medium load ones, and low duty (LD) for light load ones. (The MD mode is available for three phase 400 V class
series of inverters with a capacity of 90 kW or above.)
F80
data
Drive mode Application
Continuous rated current level
Overload
capability
Maximum
frequency
0
HD (High Duty)
mode
Heavy load
Capable of driving a motor whose capacity is the
same
as the inverter's one.
150% for 1 min.
200% for 3 s
500 Hz
2
MD (Medium
Duty) mode
Medium load
Capable of driving a motor whose capacity is one
rank higher than the inverter's one.
150% for 1 min.
120 Hz
1
LD (Low Duty)
mode
Light load
Capable of driving a motor whose capacity is one
or two ranks higher than the inverter's one.
120% for 1 min.
120 Hz
The MD-/LD-mode inverter brings out the continuous rated current level which enables the inverter to drive a motor with one
or two ranks higher capacity, but its overload capability (%) against the continuous current level decreases. For the rated current
level, see Chapter 8 "SPECIFICATIONS."
Some versions of the optional multi-function keypad (TP-G1-J1) do not display the content of the function code F80
when the data is "2," so "2: ---" appears instead of "2: Medium D." However, the function code data can be configured
normally.
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