12.8 L: PROTECTION
776 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
The output turns off and the motor coasts to stop.
■ L8-09 Ground Fault Selection
No.
(Hex.)
Name Description
Default
(Range)
L8-09
(04B5)
Ground Fault Selection
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 Fan Operate Selection
No.
(Hex.)
Name Description
Default
(Range)
L8-10
(04B6)
Fan Operate Selection
Sets operation of the heatsink cooling fan.
1
(1 - 3)
1 : Dur Run (OffDly)
The drive turns on the fan when a Run command is active.
2 : 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 [Fan Off-Delay Time] is expired, the fan stops. his setting extends the fan lifetime.
3 : Fan ON @Heating of Drive
The fan turns on when the drive detects that the main circuit is overheating.
■ L8-11 Fan Off-Delay Time
No.
(Hex.)
Name Description
Default
(Range)
L8-11
(04B7)
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 = 1 [Fan Operate Selection = 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 oL2@LoSpeed Selection
No.
(Hex.)
Name Description
Default
(Range)
L8-15
(04BB)
oL2@LoSpeed Selection
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)
Note:
Contact Yaskawa or your nearest sales representative for consultation before disabling this function at low speeds. Frequent operation of
drives under conditions of high output current in low speed ranges may shorten the service life of the drive IGBT due to heat stress.
0 : Disabled
The drive does not decrease the overload protection level.
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