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.
Note:
The cooling fan will always turn on when a damping resistor overheat (doH) is detected regardless of the setting value.
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
60 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. 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 4
o
0302 to 4
o
0930.
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.
Setting 1: oL2 (Drive Overload) Characteristics Enabled at Low Speed
The overload protection level (oL2 fault detection level) is automatically reduced at speeds below 6 Hz. At zero speed, the
overload is derated by 50%.
n
L8-18: Software Current Limit Selection
Enables and disables the Software Current Limit (CLA) protection function to prevent main circuit transistor failures caused
by high current.
Note:
Do not change this setting unless absolutely necessary.
No.
Name
Setting Range
Default
L8-18
Software Current Limit Selection
0, 1
Determined by
A1-02
Setting 0: Software CLA Disabled
The drive may trip on an oC fault if the load is too heavy or the acceleration is too short.
Setting 1: Software CLA Enabled
When the Software CLA current level is reached, the drive reduces the output voltage to reduce the current. Normal operation
continues when the current level drops below the Software CLA level.
5.8 L: Protection Functions
330
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
Summary of Contents for U1000 iQpump Drive
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