YASKAWA AC Drive-A1000 Technical Manual page 265

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.
n L8-09: Output Ground Fault Detection Selection
Enables or disables the output ground fault detection.
No.
L8-09
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.
n L8-10: Heatsink Cooling Fan Operation Selection
Selects the heatsink cooling fan operation.
No.
L8-10
Setting 0: Run with timer
The fan is switched on when a Run command is active and switched off with the delay set to parameter L8-11 after releasing
the Run command. This setting extends the fan lifetime.
Setting 1: Run always
The fan runs when power is supplied to the drive.
n 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.
L8-11
n L8-12: Ambient Temperature Setting
Automatically adapts the drive rated current to safe values when used with parameter L8-35. This eliminates the need to reduce
the drive rated current when the temperature where the drive is mounted is above the specified values.
No.
L8-12
n L8-15: oL2 Characteristics Selection at Low Speeds
Selects whether the drive overload capability (oL fault detection level) is reduced at low speeds to prevent premature output
transistor failures.
Note: Contact Yaskawa for consultation before disabling this function. Disabling this function may shorten the operating life of the power transistors.
No.
L8-15
Setting 0: Protection disabled at low speed
The overload protection level is not reduced. Frequently operating the drive with high output current at low speed can lead to
premature drive faults.
Setting 1: Protection enabled at low speed
The overload protection level (oL2 fault detection level) is automatically reduced at speeds below 6 Hz.
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Name
Output Ground Fault Detection Selection
Name
Heatsink Cooling Fan Operation Selection
Name
Heatsink Cooling Fan Off-Delay Time
Name
Ambient Temperature Setting
Name
oL2 Characteristics Selection at Low Speed
5.8 L: Protection Functions
Setting Range
0, 1
Setting Range
0, 1
Setting Range
0 to 300 s
Setting Range
-10 to 50 °C
Setting Range
0, 1
Default
1
Default
0
Default
60 s
Default
40 °C
5
Default
1
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