Earth (Ground) Fault Detection At Start - Mitsubishi Electric FR-F820-00046 Instruction Manual

Pr. Name
244 Cooling fan
H100 operation selection
 Cooling fan always ON (Pr.244 = "0")
• When Pr.244 = "0", the cooling fan operates at power ON. If the fan stops at this time, the inverter finds that the fan
operation is faulty and "
output (FAN) signal and the Alarm (LF) signal are output.
• For the terminal used for the FAN signal output, set "25 (positive logic)" or "125 (negative logic)" in any of Pr.190 to Pr.196
(Output terminal function selection) and for LF signal, set "98 (positive logic)" or "198 (negative logic)".
 Cooling fan operation control (Pr.244 = "1" (initial value), "101 to 105")
• The cooling fan operation is controlled when Pr.244 = "1". When the inverter is running, the cooling fan operates constantly.
When the inverter is stopped, the cooling fan operates depending on the temperature of the inverter heatsink. If the fan
stops although it meets the conditions for running, fan operation is regarded as faulty, [FN] is displayed on the operation
panel, and the fan signal and LF signals are output.
• To prevent the cooling fan from turning ON and OFF repeatedly during frequent starts/stops (inching), the cooling fan stop
waiting time can be set. The waiting time when Pr.244 = "101 to 105" is Pr.244 - 100 (or 1 s, if the Pr.244 = "101").
 Cooling fan operation command (Y206) signal
• The Cooling fan operation command (Y206) signal can be output when the inverter cooling fan meets the conditions for
running. The function can be used when the fan installed on the enclosure is synchronized with the inverter cooling fan.
• The Y206 signal indicates the operating command condition of the inverter cooling fan depending on the power supply ON/
OFF or the Pr.244 settings. The signal does not indicate the actual operation of the cooling fan. (The signal is output even
if the cooling fan is stopped due to a fault.)
• To use the Y206 signal, set "206 (positive logic) or 306 (negative logic)" in one of Pr.190 to Pr.196 (Output terminal
function selection) to assign function to an output terminal.
NOTE
• The cooling fan is installed on the FR-F820-00105(2.2K) or higher and the FR-F840-00083(3.7K) or higher.
• Changing the terminal assignment using Pr.190 to Pr.196 (Output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Parameters referred to
Pr.190 to Pr.196 (Output terminal function
5.7.3

Earth (ground) fault detection at start

Magnetic flux Magnetic flux Magnetic flux
V/F V/F V/F
Select whether to make earth (ground) fault detection at start. When enabled, earth (ground) fault detection is performed
immediately after a start signal input to the inverter.
Pr. Name
249 Earth (ground) fault detection at
H101 start
• If a ground fault is detected at start while Pr.249 = "1", the output-side earth (ground) fault overcurrent (E.GF) is displayed
and the outputs are shut off. (Refer to
• Pr.249 setting is enabled during V/F control and Advanced magnetic flux vector control.
Initial value Setting range
0
1
1
101 to 105
" (FN), the indication of the Fan alarm, is displayed on the operation panel. The Fan fault
selection)page 312
Initial value
0
page 579.)
Description
Cooling fan ON/OFF control disabled. (The cooling fan is always ON at
power ON.)
A cooling fan operates at power ON.
Cooling fan ON/OFF control enabled.
The fan is always ON while the inverter is running. During a stop, the
inverter status is monitored and the fan switches ON/OFF according to
the temperature.
Cooling fan ON/OFF control enabled.
Set the cooling fan stop delay time within 1 to 5 s.
Setting range
Without the earth (ground) fault detection at
0
start
1 With the earth (ground) fault detection at start
5.7 (H) Protective function parameter
Description
259
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10