Goodrive350A series high-performance multifunction VFD
Troubleshooting
-293-
Fault code
Fault type
Possible cause
Corrective measures
poorly connected
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 and restart it;
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 and restart it;
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
You should not insert two
cards with the same type;