11.9 L: Protection Functions
980 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
The output turns off and the motor coasts to stop.
■ L8-09: Output Ground Fault Detection
No.
(Hex.)
Name Description
Default
(Range)
L8-09
(04B5)
Output Ground Fault
Detection
Sets the function to enable and disable ground fault protection.
Determined by o2-04
(0, 1)
0 : Disabled
The drive will not detect ground faults.
1 : Enabled
If there is high leakage current or a ground short circuit in one or two output phases, the drive will detect GF
[Ground Fault].
Note:
If the ground path impedance is low, oC [Overcurrent], SC [Out Short Circuit or IGBT Fault], or ov [DC Bus Overvoltage] can stop the
motor.
■ L8-10: Heatsink Fan Operation Selection
No.
(Hex.)
Name Description
Default
(Range)
L8-10
(04B6)
Heatsink Fan
Operation Selection
Sets operation of the heatsink cooling fan.
0
(0 - 2)
0 : During Run, w/ L8-11 Off-Delay
The drive turns on the fan when a Run command is active.
1 : Always On
The fan turns on when you supply power to the drive. When you release the Run command and the delay time set
in L8-11 [HeatsinkCoolingFan Off DelayTime] is expired, the fan stops. his setting extends the fan lifetime.
2 : On when Drive Temp Reaches L8-64
The fan turns on when the drive detects that the main circuit is overheating.
■ L8-11: Heatsink Fan Off-Delay Time
No.
(Hex.)
Name Description
Default
(Range)
L8-11
(04B7)
Heatsink Fan Off-
Delay Time
Sets the length of time that the drive will wait before stopping the cooling
fan after cancelling the Run command when L8-10 = 0 [Heatsink Cooling
Fan Ope Select = Dur Run (OffDly)].
60 s
(0 - 300 s)
■ L8-12: Ambient Temperature Setting
No.
(Hex.)
Name Description
Default
(Range)
L8-12
(04B8)
Ambient Temperature
Setting
Sets the ambient temperature of the drive installation area.
40 °C
(-10 - +50 °C)
The drive automatically adjusts the drive rated current to the best value as specified by the set temperature. Set the
ambient temperature of the area where you install the drive to a value that is more than the drive rating.
■ L8-15: Drive oL2 @ Low Speed Protection
No.
(Hex.)
Name Description
Default
(Range)
L8-15
(04BB)
Drive oL2 @ Low
Speed Protection
Sets the function to decrease drive overload at low speeds to prevent
damage to the main circuit transistor during low speed operation (at 6 Hz or
slower) to prevent oL2 [Drive Overloaded].
1
(0, 1)
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