Sourcetronic ST600 - Page 19

Quick Start Guide for ST600 Series Frequency Inverters Possible Errors and Solutions
18
 The motor restarts during rotation;
 Grid voltage is too low;
 Load is too large;
 Power is too low;
 Avoid restart after stop;
 Check the grid voltage;
 Select a VFD with larger power;
 Select a suitable motor
SPI
[13] Phase Loss On
Input Side
Phase loss or intense fluctuation oc-
curred to R, S and T input
 Check the input power;
 Check installation wiring
SPO
[14] Phase Loss On
Output Side
Phase loss occurred to U, V, W output
(or the three phases of the motor are
asymmetrical)
 Check the output wiring;
 Check the motor and cable
OH1
[15] Rectifier Module
Overheating
 Air duct is blocked or fan is damaged;
 Ambient temperature is too high;
 Long-term overload
 Ventilate the air duct or replace the
fan;
 Lower the ambient temperature
OH2
[16] Inverter Module
Overheating
CE
[18] Modbus/Modbus
TCP Communication
Error
 Baud rate is set incorrectly;
 Communication line error;
 Communication address error;
 Communication suffers from strong in-
terference
 Set a suitable baud rate;
 Check the wiring of communication
interfaces;
 Set a suitable communication ad-
dress;
 Replace or change the wiring to im-
prove anti-interference capacity
tE
[20] Motor Autotuning
Error
 Motor capacity does not match with
the VFD capacity, this error may occur
easily if the difference between them
is exceeds five power classes;
 Motor parameters are set incorrectly;
 The parameter settings obtained via
autotuning deviate sharply from the
standard standards;
 Autotuning timeout
 Select a different VFD model, or ena-
ble V/F control mode;
 Set the correct motor type and name-
plate parameters;
 Empty the motor load and restart au-
totuning;
 Check the motor wiring and parame-
ter setup;
 Check whether the frequency upper
limit is larger than 2/3 of the rated fre-
quency
dEu
[34] Speed Deviation
Error
Load is too heavy, or stalling occurred
 Check the load to ensure it is suitable,
increase the detection time;
 Ensure that the control parameters
are set correctly
STo
[35] Maladjustment Error
 Control parameters of synchronous
motor is set improperly;
 The parameter settings obtained via
autotuning are inaccurate;
 Check the load to ensure it is suitable,
 Ensure that the control parameters
are set correctly;