Delta VFD1A5MS43ANSAA User Manual

Chapter 14 Fault CodesMS300
622
ID
Display on LCD Keypad
Fault Name
Fault Descriptions
129
Over-torque 4
(ot4)
When the output current exceeds the over-torque
detection level (Pr.14-78) and exceeds over-torque
detection time (Pr.14-79), and when Pr.14-77 is set to 2
or 4, the ot4 error displays.
Action and Reset
Action Condition
Pr.14-78
Action Time
Pr.14-79
Fault Treatment Parameter
Pr.14-77
0: No function
1: Continue operation after over-torque detection during constant speed
operation
2: Stop after over-torque detection during constant speed operation
3: Continue operation after over-torque detection during RUN
4: Stop after over-torque detection during RUN
Reset Method
Auto
When Pr.14-77 = 1 or 3, ot4 is a “Warning”. The warning is
automatically cleared when the output current < Pr.14-78.
Manual
When Pr.14-77 = 2 or 4, ot4 is a “Fault”. You must reset manually.
Reset Condition
Immediately reset
Record
Pr.14-77 = 2 or 4, ot4 is a “Fault”, and the fault is recorded.
Cause
Corrective Actions
Incorrect parameter setting
Configure the settings for Pr.14-78 and Pr.14-79 again.
Mechanical failure (e.g. over-
torque, mechanical lock)
Remove the causes of malfunction.
The load is too large
Reduce the load.
Replace the motor with a larger capacity model.
Accel./ Decel. time and working
cycle are too short
Increase the setting values for Pr.01-12–Pr.01-19 (accel./ decel. time)
V/F voltage is too high
Adjust the V/F curve (Motor 4, Pr.01-63–01-70), especially the setting value for
the mid-point voltage (if the mid-point voltage is set too low, the load capacity
decreases at low speed).
The motor capacity is too small
Replace the motor with a larger capacity model.
Overload during low-speed
operation
Decrease low-speed operation time.
Increase the motor capacity.
Torque compensation is too large
Adjust the torque compensation (refer to Pr.07-75 torque compensation gain)
until the current reduces and the motor does not stall.
Improper parameter settings for
speed tracking function (including
restart after momentary power loss
and restart after fault)
1. Correct the parameter settings for speed tracking.
2. Start the speed tracking function.
3. Adjust the maximum current for Pr.07-09 speed tracking.

Delta VFD1A5MS43ANSAA Specifications

General

Brand	Delta
Model	VFD1A5MS43ANSAA
Category	DC Drives
Language	English