Yaskawa AC Drive-P1000 Industrial Fan - Manual (Page 262)

Models 2A0004 to 2A0138, 4A0002 to 4A0072, and 5A0003 to 5A0052 come with a built-in braking transistor.
n L8-78: Power Unit Output Phase Loss Protection
Protects the power unit from phase loss.
Note: This parameter is only available in models 4A0930 and 4A1200.
No. Name Setting Range Default
L8-78 Power Unit Output Phase Loss Protection 0, 1 1
Setting 0: Disabled
Setting 1: Enabled
n L8-93: LSo Detection Time at Low Speed
Sets the amount of time until baseblock is executed after LSo has been detected at low speed.
A setting of 0.0 s disables this parameter.
No. Name Setting Range Default
L8-93 LSo Detection Time at Low Speed 0.0 to 10.0 s 1.0 s
n L8-94: LSo Detection Level at Low Speed
Determines the detection level of Sto at low speed. Set as a percentage of the maximum frequency (E1-04).
No. Name Setting Range Default
L8-94 LSo Detection Level at Low Speed 0 to 10% 3%
n L8-95: Average LSo Frequency at Low Speed
Sets the average number of times LSo can occur at low speed.
No. Name Setting Range Default
L8-95 Average LSo Frequency at Low Speed 1 to 50 times 10 times
5.8 L: Protection Functions
262 YASKAWA SIEP YAIP1U 01B AC Drive - P1000 Technical Manual