Delta VFD300C43S-HS User Manual page 369

 When you enable the over-voltage stall prevention, the drive's deceleration time is longer than
the setting.
 If you encounter any problem with deceleration time, refer to the following guides for
troubleshooting.
1. Increase the deceleration time to a suitable value.
2. Install a brake resistor (refer to Section 7-1 All Brake Resistors and Brake Units Used in AC
motor Drives for details) to dissipate the electrical energy that is regenerated from the motor.
 Related parameters:
 Pr. 01-13, Pr. 01-15, Pr. 01-17, Pr. 01-19 Deceleration Time 1–4
 Pr. 02-13–Pr. 02-14 Multiple-function Output (Relay 1 and 2)
Pr. 02-16–Pr. 02-17 Multiple-function Output (MO1 and 2)

 Pr. 06-01 Over-voltage Stall Prevention.
Over-current Stall Prevention during Acceleration

Settings
 This parameter only works in VF, VFPG, and SVC control mode.
 If the motor load is too large or the drive's acceleration time is too short, the output current of the
drive may be too high during acceleration, and it may cause motor damage or trigger protection
functions (oL or oc). Use this parameter to prevent these situations.
 During acceleration, the output current of the drive may increase abruptly and exceed the value
of Pr. 06-03. In this case, the drive stops accelerating and keeps the output frequency constant,
and then continues to accelerate until the output current decreases.
 When you enable the over-current stall prevention, the drive's acceleration time is longer than the
setting.
 When the over-current stall prevention occurs because the motor capacity is too small or
operates in the default, decrease the Pr.06-03 setting value.
 When you encounter any problem with the acceleration time, refer to the following guides for
troubleshooting.
1. Increase the acceleration time to a suitable value.
2. Set Pr. 01-44 Auto Acceleration / Deceleration Setting to 1, 3 or 4 (auto-acceleration).
 Related parameters:
 Pr. 01-12, Pr. 01-14, Pr. 01-16, Pr. 01-18 Acceleration Time 1–4
 Pr. 01-44 Auto Acceleration / Deceleration Setting
 Pr. 02-13–02-14 Multi-function Output 1 (RY1 and RY2)
 Pr. 02-16–02-17 Multi-function Output (MO1 and 2)
0–160% (100%: drive's rated current)
12.1-06-3
Chapter 12 Description of Parameter SettingsC2000-HS
Default: 120