INVT Goodrive350-19 Series - Page 401

Goodrive350-19 series VFD Troubleshooting
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Fault
code
Fault type
Possible cause
Corrective measure
ENC1D
Encoder reversal
fault
The encoder speed signal is
contrary to the motor running
direction
Reset encoder direction
ENC1Z
Encoder Z pulse
offline fault
Z signal wires are
disconnected
Check the wiring of Z signal
OT
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
Safe torque off
Safe torque off function is
enabled by external forces
/
STL1
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
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
Exception occurred
to channel H1 and
channel H2
Hardware fault occurred to
STO circuit
Replace the control board