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îš‹ Output Open Phase Protection
This function detects an open output phase by comparing the output current value of each phase with an inter-
nal set output open phase detection level (5% of inverter rated current). The detection will not work when the
output frequency is below 2% of the base frequency (E1-13).
Three settings are available:
• L8-07=0, output open phase detection disabled
• L8-07=1, the loss of one phase is detected only
• L8-07=2, the loss of 2 or 3 phases is detected as well
îš„Related Parameters
The function should be disabled if the motor capacity is very low compared to the inverter capacity. Otherwise
wrong output open phase faults might be detected.
îš‹ 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 output is activated.
îš„Related Parameters
It is not recommended to disable this function.
îš‹ Cooling Fan Control
This function controls the fan which is mounted to the inverters heatsink.
îš„Related Parameters
Parameter
No.
Name
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f with
PG
Open
Loop
Vector
Closed
Loop
Vector
L8-07Output open-phase protection selection 0 No AAAA
Parameter
No.
Name
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f with
PG
Open
Loop
Vector
Closed
Loop
Vector
L8-09 Ground protection selection 1 No AAAA
Parameter
No.
Name
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f with
PG
Open
Loop
Vector
Closed
Loop
Vector
L8-10Cooling fan control selection 0 No AAAA
L8-11Cooling fan control delay time 60 s No AAAA
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