5.8 L: Protection Functions
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YASKAWA ELECTRIC
SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
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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.
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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 Run command is active. It is switched off with the delay set in parameter L8-11 after the
Run 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.
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L8-11: Heatsink Cooling Fan Off-Delay Time
Sets the cooling fan switch off delay time if parameter L8-10 is set to 0.
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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, the drive rating automatically adapts to safe values.
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L8-15: oL2 Characteristics Selection at Low Speed
Selects whether the drive overload capability (oL fault detection level) is reduced at low speeds in order to prevent
premature output transistor failures.
Setting 0: Disabled
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: Enabled
The overload protection level (oL2 fault detection level) is automatically reduced at speeds below 6 Hz.
No.
Name
Setting Range
Default
L8-09
Output Ground Fault Detection Selection
0 or 1
Determined
by o2-04
No.
Name
Setting Range
Default
L8-10
Heatsink Cooling Fan Operation Selection
0 or 1
0
No.
Name
Setting Range
Default
L8-11
Heatsink Cooling Fan Off-Delay Time
0 to 300 s
60 s
No.
Name
Setting Range
Default
L8-12
Ambient Temperature Setting
-10 to +50 °C
40 °C
No.
Name
Setting Range
Default
L8-15
oL2 Characteristics Selection at Low Speed
0 or 1
1