Sourcetronic ST600 - 6 Possible Errors and Solutions

Quick Start Guide for ST600 Series Frequency Inverters Possible Errors and Solutions
17
6 Possible Errors and Solutions
Note: Our error code scheme is being upgraded. Some products use the old scheme and the others use the new
one, which are listed in "Error code display".
Error
Code
Error Type
Possible Cause
Corrective Measures
OUt1
[1] Inverter Unit U Phase
Protection
 Acceleration is too fast;
 IGBT module is damaged;
 Malfunction due to interference; wires
are poorly connected;
 To-ground short-circuit occurred
 Increase acceleration time;
 Replace the power unit;
 Check the wires;
 Check for sources of strong interfer-
ence in the vicinity of the peripheral
device
OUt2
[2] Inverter Unit V Phase
Protection
OUt3
[3] Inverter Unit W
Phase Protection
OC1
[4] Overcurrent During
Acceleration
 Acceleration is too fast;
 Grid voltage is too low;
 VFD power is too small;
 Load transient or exception occurred;
 To-ground short-circuit or output
phase loss occured;
 Strong external interference;
 Overvoltage stalling protection is not
enabled
 Increase the ACC/DEC time;
 Check the input power;
 Select a VFD with larger power;
 Check if the load is short-circuited (to-
ground short-circuit or line-to-line
short-circuit) or the rotation is not
smooth;
 Check the output wiring;
 Check for sources of strong interfer-
ence;
 Check the setup of related function
codes.
OC2
[5] Overcurrent During
Deceleration
OC3
[6] Overcurrent During
Constant Speed
Running
OV1
[7] Overvoltage During
Acceleration
 Deceleration is too short;
 Exception occurred at the input volt-
age;
 Large energy feedback;
 Lack of braking units;
 Dynamic braking is not enabled, and
the deceleration time is too short.
 Check the input power;
 Check if the load deceleration time is
too short; or if the motor starts up dur-
ing rotation;
 Install dynamic braking units;
 Check the settings of related function
codes
OV2
[8] Overvoltage During
Deceleration
OV3
[9] Overvoltage During
Constant Speed
UV
[10] Bus Undervoltage
Error
 Grid voltage is too low;
 Overvoltage stalling protection is not
enabled
 Check the grid input power;
 Check the setup of related function
codes
OL1
[11] Motor Overload
 Grid voltage is too low;
 Rated motor current is set incorrectly;
 The motor stalls, or the load jumps vi-
olently
 Check the grid voltage;
 Reset the rated motor current;
 Check the load and adjust the torque
boost
OL2
[12] VFD Overload
 Acceleration is too fast;
 Increase acceleration time;