5.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual 237
Setting 0: Disabled
Setting 1: Fault when one phase is lost
An output phase loss fault (LF) is triggered when one output phase is lost. The output shuts off and the motor coasts to
stop.
Setting 2: Fault when two phases are lost
An output phase loss fault (LF) is triggered when two output phases are lost. The output shuts off and the motor coasts to
stop.
Setting 3: Fault at phase loss at start or when two phases lost mid-operation
An output phase loss fault (LF) is triggered when one phase is lost at motor start or when two phases are lost while
running at speed. The output shuts off, the motor coasts to a stop.
■
L8-09: Output Ground Fault Detection Selection
Enables or disables the output ground fault detection.
Setting 0: Disabled
Ground faults are not detected.
Setting 1: Enabled
A ground fault (GF) is triggered when high leakage current or a ground short circuit occurs in one or two output phases.
■
L8-10: Heatsink Cooling Fan Operation Selection
Selects the heatsink cooling fan operation.
Setting 0: Run with timer
The fan is switched on when a Up/Down command is active. It is switched off with the delay set in parameter L8-11 after
the Up/Down command has been released. Using this setting extends the fan lifetime.
Setting 1: Run always
The fan runs whenever power is supplied to the drive.
Setting 2: Temperature controlled
Cooling fan operated depending on the temperature of the drives heatsink.
■
L8-11: Heatsink Cooling Fan Off Delay Time
Sets the cooling fan switch off-delay time if parameter L8-10 is set to 0.
■
L8-12: Ambient Temperature Setting
If the temperature where the drive is mounted is above the specified values, the drive rated current must be reduced for
optimal performance life. By setting the ambient temperature to parameter L8-12 and adjusting the installation method
setting in L8-35, the drive rating automatically adapts to safe values.
No. Parameter Name Setting Range Default
L8-09 Output Ground Fault Detection Selection 0 or 1 1
No. Parameter Name Setting Range Default
L8-10 Heatsink Cooling Fan Operation Selection 0 to 2 0
No. Parameter Name Setting Range Default
L8-11 Heatsink Cooling Fan Off Delay Time 0 to 300 s 60 s
No. Parameter Name Setting Range Default
L8-12 Ambient Temperature Setting -10 to 50°C 40°C
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