Ground Fault Protection; Cooling Fan Control - YASKAWA Varispeed E7 Instruction Manual And Parameter Description

Related Constants
Con-
stant
Number
L8-06 Input Phase Loss Detection Level

Ground Fault Protection

This function detects the earth leakage current by calculating the sum of the three output currents. Normally it
should be 0. If the earth leakage current gets too high, the inverter output will be switched off and a GF fault
is shown on the display. The fault contact is activated.
Related Constants
Con-
stant
Number
L8-09 Ground fault protection selection
It is not recommended to disable this function.

Cooling Fan Control

This function controls the fan that is mounted to the inverters heatsink.
Related Constants
Con-
stant
Number
L8-10 Cooling fan control selection
L8-11 Cooling fan control delay time
Selecting the Cooling Fan Control
Using constant L8-10 two modes can be selected:
0: The fan is ON only when the inverter output is ON, i.e. a voltage is output. This is the factory setting.
1: The fan is ON whenever the inverter power supply is switched ON.
If L8-10 is set to 0, the turn OFF delay time for the fan can be set in constant L8-11. After a stop command the
inverter waits for this time before switching OFF the cooling fan. The factory setting is 300 sec.
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Name
Allowed DC bus ripple before input phase loss is detected
in percent of the OV trip level.
200V class: 400 VDC
400V class: 800 VDC
Name
0: Disabled
1: Enabled
Name
Sets the ON/OFF control for the cooling fan.
0: ON only when inverter output is active.
1: ON whenever power is ON.
Sets the time in seconds to delay turning OFF the cooling
fan after the inverter STOP command is given.
Description
Setting
Description
Range
0 or 1
Description
Change
Setting Factory during Access
Range Setting Opera- Level
tion
0.0 to
5.0 % No A
25.0 %
Change
Factory Access
during
Setting Level
Operation
1 No A
Change
Setting Factory during Access
Range Setting Opera- Level
tion
0 or 1 0 No A
0 to 300 300 s No A