YASKAWA A1000 Technical Manual page 299


L8-29: Current Unbalance Detection (LF2)
Enables or disables output current imbalance detection when running in OLV/PM, AOLV/PM, or CLV/PM. Current
unbalance can heat up a PM motor and lead to demagnetization of the magnets. The current imbalance detection function
prevents such motor damage by monitoring output current and triggering the LF2 fault when current unbalance occurs.
No.
L8-29
2A0004 to 2A0415, 4A0002 to 4A0630
Setting 0: Disabled
No current unbalance protection is provided to the motor.
Setting 1: Enabled (current and voltage detection)
Setting 2: Enabled (current detection)
The LF2 fault is triggered if an output current imbalance is detected. Drive output shuts off and the motor coasts to stop.
Setting 3: Enabled (voltage detection)
4A0930, 4A1200
Setting 0: Disabled
Setting 1: Enabled (current detection)

L8-32 Cooling Fan Failure Selection
Determines drive operation when a FAn fault occurs.
No.
L8-32
Setting 0: Ramp to stop
The drive stops the motor using the deceleration time1 set in parameter C1-02.
Setting 1: Coast to stop
The drive output is switched off and the motor coasts to stop.
Setting 2: Fast stop
The drive stops the motor using the Fast stop time set in parameter C1-09.
Setting 3: Alarm only
The operation is continued and a FAn alarm is displayed on the digital operator.
Setting 4: Operation with reduced speed
The operation is continued but the speed is reduced to the level set in parameter L8-19.
Note: FAn is detected as an error when setting 0 to 2 is selected. It is detected as an alarm when setting 3 or 4 is selected.

L8-35: Installation Method Selection
Selects the type of installation for the drive and changes the drive overload (oL2) limits accordingly. Refer to
Temperature Derating on page 447
Note: 1. This parameter is not reset when the drive is initialized.
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.
L8-35
Setting 0: IP00 enclosure
For an IP00 enclosure drive installed with at a minimum of 30 mm space to the next drive or a cabinet wall.
Setting 1: Side-by-Side mounting
For drives mounted according to YASKAWA's Side-by-Side specifications (requires 2 mm between drives).
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Name
Current Unbalance Detection (LF2)
Name
Cooling Fan Failure Selection
for detail.
Name
Installation Method Selection
5.8 L: Protection Functions
Setting Range
2A0004 to 2A0415, 4A0002 to 4A0630:
0 to 3
4A0930, 4A1200: 0, 1
Setting Range
0 to 4
Setting Range
0 to 3
Default
1
Default
1
5
Default
Determined by o2-04
299