Setting 2: Fault when Two Phases Are Lost
An output phase loss fault (LF) is triggered when two or more output phases are lost. The output shuts off and the motor coasts
to stop.
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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, 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.
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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, 1 0
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.
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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.
No. Name Setting Range Default
L8-11 Heatsink Cooling Fan Off-Delay Time 0 to 300 s 60 s
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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. Refer to Temperature
Derating on page 428 for details.
No. Name Setting Range Default
L8-12 Ambient Temperature Setting -10 to +50 °C 40 °C
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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. Set this parameter to 0 (Protection disabled at low speed) when protection is activated for an oL2 fault for
a light load at low speed.
Note: 1. Contact Yaskawa before using the drive for applications for which the setting is 0 (disabled).
2. Do not set this parameter to 0 (disabled) in V/f or OLV control.
3.
Do not set this parameter to 0 (disabled) in models 4o0302 to 4o0930.
No. Name Setting Range Default
L8-15 oL2 Characteristics Selection at Low Speed 0, 1 1
Setting 0: oL2 (Drive Overload) Characteristics 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.
5.8 L: Protection Functions
260
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
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