YASKAWA V1000 Series Installation & Start-Up Manual page 200

5.4 Fault Detection
Excessive load inertia.
Motor is driven by the load.
Something on the load side is
restricting deceleration.
The overload time during High-slip
Braking during is too short.
LED Operator Display
Cause
LCD operator is not properly
connected to the drive.
LED Operator Display
Cause
Overshoot or undershoot is
occurring.
Incorrect PG pulse settings.
Inappropriate parameter settings.
LED Operator Display
Cause
Deceleration time is too short and
regenerative energy flows from the
motor into the drive.
200
• Reduce deceleration times using parameters C1-02, -04, -06 and -08 in
applications that do not use High-slip Braking.
• Use a braking resistor to shorten deceleration time.
• Increase parameter n3-04 (High-slip Braking Overload Time).
• Install a thermal relay and increase the parameter setting of n3-04 to the
maximum value.
Digital Operator Connection Fault
• The LCD operator has been disconnected from the drive. Note: An oPr fault
will occur when all of the following conditions are true:
oPr
• Output is interrupted when the operator is disconnected (o2-06 = 1).
• The run command is assigned to the LCD operator (b1-02 = 0 and LOCAL
has been selected).
• Check the connection between the LCD operator and the drive.
• Replace the cable if damaged.
• Turn off the drive input power and disconnect the LCD operator. Next
reconnect the operator and turn the drive input power back on.
Overspeed (Simple V/f with PG)
oS
Pulse input (RP) indicates that motor speed feedback exceeded F1-08 setting.
• Adjust the gain by using the pulse train input parameters
(H6-02 through H6-05).
• Increase the settings for C5-01 (Speed Control Proportional Gain 1) and
reduce C5-02 (Speed Control Integral Time 1).
Set the H6-02 (Pulse Train Input Scaling) = 100%, the number of pulses during
maximum motor revolutions.
Check the setting for the overspeed detection level and the overspeed detection
time (F1-08 and F1-09).
Overvoltage
Voltage in the DC bus has exceeded the overvoltage detection level.
ov
For 200 V class: approximately 410 V
For 400 V class: approximately 820 V (740 V when E1-01 is less than 400)
• Increase the deceleration time (C1-02, -04, -06, -08).
• Install a braking resistor or a dynamic braking resistor unit.
• Enable stall prevention during deceleration (L3-04 = "1"). Stall prevention is
enabled as the default setting.
YASKAWA ELECTRIC TOEP C710606 09B YASKAWA AC Drive V1000 Installation & Start-Up Manual
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution