Yaskawa Z1000U - Manual (Page 172)

Setting 0: Disabled
Motor protection with LF2 is disabled.
Setting 2: Current Det Type
LF2 fault is triggered when an output current imbalance is detected. Drive output shuts off and the motor coasts to stop.
n L8-32: Cooling Fan Failure Selection
Determines drive operation when a FAn fault occurs.
No. Name Setting Range Default
L8-32 Cooling Fan Failure Selection 0 to 2 1
Setting 0: Ramp to Stop
The drive stops the motor using the deceleration time 1 set in parameter C1-02.
Setting 1: Coast to Stop
The drive output is switched off and the motor coasts to a stop.
Setting 2: Fast Stop
The drive stops the motor using the Fast stop time set in parameter C1-09.
n L8-35: Installation Method Selection
Selects the type of installation for the drive and changes the drive overload (oL2) limits accordingly.
Note: 1. Initialization does not reset this parameter.
2. The value is preset to the appropriate value when the drive is shipped. Change the value only when using Side-by-Side installation or
when mounting a standard drive with the heatsink outside the cabinet.
No. Name Setting Range Default
L8-35 Installation Method Selection 0, 2, 3 <1>
<1> Default setting is determined by parameter o2-04, Drive Model Selection.
Setting 0: IP00/Open-Chassis Enclosure
For an Open Type enclosure drive installed with at a minimum of 30 mm space to the next drive or a cabinet wall.
Setting 2: IP20/NEMA Type 1 Enclosure
For drives compliant with IP20/NEMA Type 1 enclosure specifications.
Setting 3: Finless Drive or External Heatsink Installation
For finless drives or a standard drive mounted with the heatsink outside the cabinet or enclosure panel.
n L8-38: Carrier Frequency Reduction Selection
Selects the operation of the carrier frequency reduction function. Reduces the carrier frequency when the output current exceeds
a certain level. This temporarily increases the overload capability (oL2 detection), allowing the drive to run through transient
load peaks without tripping.
No. Name Setting Range Default
L8-38 Carrier Frequency Reduction Selection 0 to 2
Determined by
A1-02 and o2-04
Setting 0: Disabled
No carrier frequency reduction at high current.
Setting 1: Enabled for Output Frequencies below 6 Hz
The carrier frequency is reduced at speeds below 6 Hz when the current exceeds 100% of the drive rated current. The drive
returns to the normal carrier frequency when the current falls below 88% or the output frequency exceeds 7 Hz.
Setting 2: Enabled for Entire Frequency Range
The carrier frequency is reduced at the following speeds:
• Below 6 Hz when the current exceeds 100% of the drive rated current.
• Above 7 Hz when the current exceeds 112% of the drive rated current.
4.12 Advanced Drive Setup Adjustments
172 YASKAWA ELECTRIC TOEP C710636 10B Z1000U HVAC MATRIX Drive User Manual