Parameter Details
12
12.9 L: Protection Functions
YASKAWA SIEPC71061705H GA700 Series Technical Manual 911
■ L8-07: Output Phase Loss Protection Sel
No.
(Hex.)
Name Description
Default
(Range)
L8-07
(04B3)
Output Phase Loss
Protection Sel
Sets the function to enable and disable output phase loss detection. The drive starts output phase
loss detection when the output current decreases to less than 5% of the drive rated current.
0
(0 - 2)
Note:
The drive can incorrectly start output phase loss detection in these conditions:
• The motor rated current is very small compared to the drive rating.
• The drive is operating a PM motor with a small load.
0 : Disabled
1 : Fault when one phase is lost
If the drive loses one output phase, it will trigger LF [Output Phase Loss].
The output turns off and the motor coasts to stop.
2 : Fault when two phases are lost
If the drive loses more than one output phase, it will trigger LF [Output Phase Loss].
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, the drive can detect oC [Overcurrent], SC [Short Circuit/IGBT Failure], or ov [Overvoltage]
instead of GF.
■ 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.
When you release the Run command and the delay time set in L8-11 [Heatsink Fan Off-Delay Time] is expired,
the fan stops. This setting extends the fan lifetime.
1 : Always On
The fan turns on when you supply power to the drive.
2 : Temperature-Dependent Fan Ctrl.
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 it stops the cooling fan after it cancels the
Run command when L8-10 = 0 [Heatsink Fan Operation Selection = During Run, w/ L8-11 Off-
Delay].
60 s
(0 - 300 s)
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