Sourcetronic ST600 - Page 262

Frequency Inverter ST600 Series High-Performance Multifunction VFD Troubleshooting
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EF
[17] External fault
SI external fault input terminal
acts
Check external device input
CE
[18] Modbus/Modbus TCP
communication fault
Baud rate is set improperly;
Communication line fault;
Communication address error;
Communication suffers from
strong interference
Set proper baud rate;
Check the wiring of
communication interfaces;
Set proper communication
address;
Replace or change the wiring
to enhance anti-interference
capacity
ItE
[19] Current detection fault
Poor contact of the connector of
control board;
Hall component is damaged;
Exception occurred to
amplification circuit
Check the connector and re-
plug;
Replace the hall component;
Replace the main control
board
tE
[20] Motor autotuning fault
Motor capacity does not match
with the VFD capacity, this fault
may occur easily if the difference
between them is exceeds five
power classes;
Motor parameter is set
improperly;
The parameters gained from
autotuning deviate sharply from
the standard parameters;
Autotuning timeout
Change the VFD model, or
adopt V/F mode for control;
Set proper motor type and
nameplate parameters;
Empty the motor load and
carry out autotuning again;
Check motor wiring and
parameter setup;
Check whether upper limit
frequency is larger than 2/3 of
the rated frequency
EEP
[21] EEPROM fault
R/W error occurred to the control
parameters;
EEPROM is damaged
Press STOP/RST to reset;
Replace the main control
board
PIDE
[22] PID feedback offline
fault
PID feedback offline;
PID feedback source disappears;
Check PID feedback signal
wires;
Check PID feedback source
bCE
[23] Braking unit fault
Brake circuit fault or brake tube is
damaged;
The resistance of external brake
resistor is too small
Check the brake unit, replace
with new brake tubes;
Increase brake resistance
END
[24] Running time is up
The actual running time of the
VFD is larger than the set running
time
Ask help from the supplier,
adjust the set running time
OL3
[25] Electronic overload
fault
The VFD releases overload pre-
alarm based on the set value
Check the load and overload
pre-alarm threshold
PCE
[26] Keypad
communication fault
The keypad wire is poorly
contacted or disconnected;
The keypad wire is too long and
suffers strong interference;
Check the keypad wires to
confirm whether fault exists;
Check the surroundings to
rule out interference source;