7-14
(4) Overvoltage
1) Vector control and sensorless vector control
Overvoltage
OU
Is power supply voltage within
specification?
Use torque limiter function
(function code F40 to 45)
to limit braking torque to 3 to 10%.
Inverter fault is suspected.
Contact FUJI.
NO
YES
Decrease power supply voltage
lower than maximum specification.
Eliminate short-circuit or grand fault.
Consider braking torque application.
You need braking unit for models of
75kW or more in 200V series and
132kW or more in 400V series.
YES
Adjust connection.
YES
You must replace braking resistor.
Contact FUJI.
YES
YES
NO
YES
NO
NO
NO
NO
Is inverter output wiring (U, V, W)
short-circuited to ground?
(Disconnect output wiring and make
sure no continuity with ground).
Is braking resistor installed?
Is braking torque necessary?
Is braking resistor connection incorrect?
Is braking resistor disconnected?
Is resistance correct?
(Make sure to turn off power to check
resistor).
Summary of Contents for 5000VG7S Series
Page 7: ...0 6 Warning Label Position for Inside the Inverter...
Page 23: ...2 5 Basic Wiring Diagram Figure 2 3 1 Basic Wiring Diagram...
Page 36: ...2 18 l Control circuit terminals Control circuit terminals Screw size M3...
Page 94: ...9 4 FS5941 40 47 Figure 9 1 FS5941 60 52 FS5941 86 52 Figure 9 2...
Page 96: ...9 6 RF3280 F11 RF3400 F11 Figure 9 5 RF3880 F11 Figure 9 6 6 6 Figure 9 7 F200160...
