Yaskawa Z1000 AC Drive HVAC - Manual (Page 177)

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 or more 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. Name Setting Range Default
L8-09 Output Ground Fault Detection Selection 0, 1
Determined by
o2-04
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. 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.
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. Name Setting Range Default
L8-11 Heatsink Cooling Fan Off-Delay Time 0 to 300 s 300 s
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. Name Setting Range Default
L8-12 Ambient Temperature Setting -10 to +50 °C 40 °C
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. Name Setting Range Default
L8-15 oL2 Characteristics Selection at Low Speed 0, 1 1
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.
4.13 Advanced Drive Setup Adjustments
YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual 177
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Start-Up Programming & Operation