Troubleshooting
8.6 Troubleshooting
149
8 - Troubleshooting & Maintenance
Condition Check Point
The motor
does
not rotate
1) Main circuit inspection
•
Is the input(line) voltage normal.(If the LED in the drive is lit)
•
Is the motor connected correctly?
2) Input signal inspection
•
Do the operating signal input to the drive.
•
Do the forward and the reverse signal input simultaneously to the drive?
•
Do the command frequency signal input to the drive.
3) Parameter setting inspection
•
Is the reverse prevention (FU1-03) function set?
•
Is the operation mode (FU1-01) set correctly?
•
Is the command frequency set to 0?
4) Load inspection
•
Is the load too large, or is the motor restrained.(mechanical brake)
5) Other
•
Is the alarm displayed on the keypad, or the alarm LED (STOP LED blinks)
lit.
The motor
rotates at
opposite
directions
•
Is the phase sequence of the output terminal U,V,W correct.
•
Is the starting signal (forward/reverse) connected correctly?
The
difference
between the
rotating speed
and the
reference is
too big
•
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 is influenced by external noise.(Use a shielded wire)
The drive
does not
accelerate or
decelerate
smoothly
•
Is the acceleration/deceleration time is set too short.
•
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.
The motor
current is too
high
•
Is the load too large?
•
Is the Torque Boost Value (manual) too high?
The rotating
speed does
not increase
•
Is the Upper Limit Frequency (FU1-25) value is correct.
•
Is the load too large?
•
Is the Torque Boost (FU1-27, 28) value is too high that the stall prevention
function (FU1-59, 60) does not operate.
The rotating
speed
oscillates
when the
drive is
operating.
1) Load inspection
•
Is the load oscillating?
2) Input signal inspection
•
Is the frequency reference signal oscillating?
3) Other
•
Is the wiring too long when the drive is using V/F control.(over 500m)
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