YASKAWA CR700, Technical Manual, Page: 764 / 886

11.9 L: Protection Function
764 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
• The output current is less than 30% of the drive rated current.
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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 and the motor coasts to stop when the output current decreases to less than 5% of
the drive rated current.
1
(0 - 2)
Note:
Output phase loss detection can mistakenly be triggered in the following situations. Disable output phase loss protection.
• The motor rated current is very small compared to the drive rating.
0 : Disabled
1 : Fault when one phase is lost
An LF [Output Phase Loss] is triggered when one output phase is lost.
The drive output shuts off and the motor coasts to stop.
2 : Fault when two phases are lost
An LF [Output Phase Loss] is triggered when two or more output phases are lost.
The drive output shuts off and the motor coasts to stop.
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L8-08: Output Phase Loss Detection Lvl
No.
(Hex.)
Name Description
Default
(Range)
L8-08
(04B4)
Output Phase Loss
Detection Lvl
Sets the output phase loss detection level.
5.0%
(0.0 - 20.0%)
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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 .
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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.
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV