Troubleshooting - LG SV008iS5-2 Manual

5.3 Troubleshooting

Condition
1) Main circuit inspection:
2) Input signal inspection:
The Motor Does Not
3) Parameter setting inspection:
Rotate
4) Load inspection:
5) Other:
The Motor Rotates
☞
in Opposite
☞
Directions
The Difference
☞
Between the
☞
Rotating Speed and
the Reference is
☞
Too Large
☞
The Inverter Does
Not Accelerate or ☞
Decelerate
☞
Smoothly
☞
The Motor Current
is Too High
☞
☞
The Rotating Speed ☞
Does Not Increase
☞
1) Load inspection:
The Rotating Speed
2) Input signal inspection:
Oscillates When the
Inverter is
Operating.
3) Other:
☞
Is the input (line) voltage normal? (Is the LED in the inverter is lit?)
☞
Is the motor connected correctly?
☞
Check the operating signal input to the inverter.
☞
Check the forward and the reverse signal input simultaneously to the inverter?
☞
Check the command frequency signal input to the inverter.
☞
Is the reverse prevention (FU1-03) function set?
☞
Is the operation mode (FU1-01) set correctly?
☞
Is the command frequency set to 0?
☞
Is the load too large or is the motor jammed? (Mechanical brake)
☞
Is the alarm displayed on the keypad or is the alarm LED lit? (STOP LED blinks)
Is the phase sequence of the output terminal U, V, W correct?
Is the starting signal (forward/reverse) connected correctly?
Is the frequency reference signal correct? (Check the level of the input signal)
Is the following parameter setting is correct?
Lower Limit Frequency (FU1-24), Upper Limit Frequency (FU1-25), Analog Frequency Gain (I/O-1~10)
Is the input signal line influenced by external noise? (Use a shielded wire)
Is the acceleration/deceleration time is set too short a period of time?
Is the load too large?
Is the Torque Boost (FU1-27, 28) value is too high that the current limit function and the stall prevention
function do not operate?
Is the load too large?
Is the Torque Boost Value (manual) too high?
Is the Upper Limit Frequency (FU1-25) value correct?
Is the load too large?
Is the Torque Boost (FU1-27, 28) value too high that the stall prevention function (FU1-59, 60) does not
operate?
☞
Is the load oscillating?
☞
Is the frequency reference signal oscillating?
☞
Is the wiring too long when the inverter is using V/F control? (over 500m)
Chapter 5 - Troubleshooting & Maintenance
Check Point
79