Sourcetronic ST600 Series - Page 264

Frequency Inverter ST600 Series High-Performance Multifunction VFD Troubleshooting
-257-
ENC1o
[37] Encoder offline fault
Encoder line sequence is wrong,
or signal wires are poorly
connected
Check the encoder wiring
ENC1d
[38] Encoder reversal fault
The encoder speed signal is
contrary to the motor running
direction
Reset encoder direction
ENC1Z
[39] Encoder Z pulse
offline fault
Z signal wires are disconnected
Check the wiring of Z signal
OT
[59] Motor over-
temperature fault
Motor over-temperature input
terminal is valid;
Exception occurred to t
temperature detection Exception
occurred to resistor;
Long-time overload running or
exception occurred
Check the wiring of motor
over-temperature input
terminal (terminal function
57);
Check whether temperature
sensor is proper;
Check the motor and perform
maintenance on the motor
STO
[40] Safe torque off
Safe torque off function is
enabled by external forces
/
STL1
[41] Exception occurred to
safe circuit of channel H1
The wiring of STO is improper;
Fault occurred to external switch
of STO;
Hardware fault occurred to safety
circuit of channel H1
Check whether terminal wiring
of STO is proper and firm
enough;
Check whether external
switch of STO can work
properly;
Replace the control board
STL2
[42] Exception occurred to
channel H2 safe circuit
The wiring of STO is improper;
Fault occurred to external switch
of STO;
Hardware fault occurred to safety
circuit of channel H2
Check whether terminal wiring
of STO is proper and firm
enough;
Check whether external
switch of STO can work
properly;
Replace the control board
STL3
[43] Exception occurred to
channel H1 and channel
H2
Hardware fault occurred to STO
circuit
Replace the control board
CrCE
[44] Safety code FLASH
CRC check fault
Control board is faulty
Replace the control board
E-Err
[55] Repetitive expansion
card type
The two inserted expansion cards
are of the same type
Users should not insert two
cards with the same type;
check the type of expansion
card, and remove one card
after power down
ENCUV
[56] Encoder UVW loss
fault
No electric level variation
occurred to UVW signal
Check the wiring of UVW;
Encoder is damaged