YASKAWA V1000 Technical Manual page 226

5.8 L: Protection Functions
n L8-07: Output Phase Loss Protection Selection
Enables or disables the output phase loss detection, which is triggered when the output current falls below 5% of the drive
rated current.
Note: Output phase loss detection can mistakenly be triggered if the motor rated current is very small compared to the drive rating. Disable
this parameter in such cases.
No.
L8-07
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 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.
L8-09
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.
L8-10
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.
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.
L8-11
n 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 L8-35, the drive rating automatically adapts to safe values.
No.
L8-12
n L8-15: oL2 Characteristics Selection at Low Speeds
Selects whether the drive overload capability (oL fault detection level) is reduced at low speeds in order to prevent
premature output transistor failures.
No.
L8-15
226
Name
Output Phase Loss Protection Selection
Name
Output Ground Fault Detection
Name
Fan Operation Selection
Name
Cooling Fan Switch Off Delay
Name
Ambient Temperature Setting
Name
oL2 Characteristics at Low Speed
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
Setting Range
0 to 2
Setting Range
0 or 1
Setting Range
0 or 1
Setting Range
0 to 300 s
Setting Range
-10 to +50 °C
Setting Range
0 or 1
Default
0
Default
1
Default
0
Default
60 s
Default
40 °C
Default
1