5.8 L: Protection Functions
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.
■ L8-09: Output Ground Fault Detection Selection
Enables or disables the output ground fault detection.
No.
Name
Setting Range
Default
L8-09
Output Ground Fault Detection Selection
0 or 1
1
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.
No.
Name
Setting Range
Default
L8-10
Heatsink Cooling Fan Operation Selection
0 to 2
0
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 o f 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.
No.
Name
Setting Range
Default
L8-11
Heatsink Cooling Fan Off D elay Time
0 to 300 s
60 s
■ 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.
Name
Setting Range
Default
L8-12
Am bient Temperature Setting
-10 to 50 °C
4
О
C
■ L8-15: oL2 (Drive Overload) Characteristics Selection at Low Speeds
Selects whether the drive overload capability (oL fault detection level) is reduced at low speeds in order to prevent
premature output transistor failures.
N ote: Contact Yaskawa for consultation first before disabling this setting.
No.
Name
Setting Range
Default
L8-15
oL2 Characteristics Selection at L ow Speed
0 or 1
1
200
YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual