User Manual of SY5000 series AC Drive Toubleshooting
~93~
Table 7-3 Anomaly and countermeasure
Anomaly
Reason
Countermeasure
The motor
doesn’t work.
1. Wrongly connect lines of
input, output or phase-failure
occurs;
2. Over-burdened load or the
motor locked rotation;
3. EMS terminal has signal
input;
4. Set frequency as 0;
5. No output voltage of inverter
output terminal ;
6. Stop due to faults.
1.Please check input and output
wirings;
2.Please reduce the load;
3.Please chek if there is EMS signal
input;
4.Please check the correctness of
biasing (parameter E-031) and
gaining (parameter E-032);
5.Measure output voltage, confirm if
3-ph output is balanced;
6.If the fault happens, please run
gain after troubleshooting.
The motor
rotates in reverse
direction.
The sequence of output terminal
reverses.
Please adjust the wiring sequence of
U, V, W
The motor
rotates, but the
speed doesn’t
change.
1. The load is over-burdened;
2. The upper limit frequency
(b-010) is too low;
3. Frequency setting signal is too
low.
1.Please reduce the load;
2.Check maximum frequency value
(b-010);
3.Check signal value and the loop
connection
The motor can
not accelerate
or decelerate
smoothly.
Setting value of accel/decel time
is too short.
Increase accel/decel time value
The motor
operating speed
changes.
1. Large fluctuation of load or
over-burdened load;
2. The rated values of the
inverter and the motor do not
match the load
1. Please lower the load fluctuations
or reduce the load;
2. Please select the inverter and the
motor with approximate load
The motor
operating speed
does not match
the setting
value.
1. The setting display proportion
is wrong;
2. Setting value of highest
frequency (b-009) or base
frequency (b-008) is wrong;
3. The motor terminal voltage is
low.
1. Please check the pair number of
electric poles;
2. Please check the setting value of
highest frequency (b-009) or base
frequency (b-008);
3. Please use thick lines output
