STEP ET Series - Page 154

Chapter 8 Troubleshooting
Shanghai Sigriner STEP Electric Co., Ltd.
- 144 -
Error
code
Fault display
Possible causes
Countermeasures
protection
Motor abnormality
To replace the motor, the ground insulation
shall be tested first
The earth-leakage current
is too large on the output
side of inverter
Request for maintenance of professional
and technical personnel.
34
External fault
There is an external input
failure signal
Check external failure causes
35
PT detection
error
PT detection signal
exceeds the set threshold
Check whether the motor temperature is too
high or if the PT sensor is abnormal
37
Current
sensor failure
Driver board hardware
failure
Request for maintenance of professional
and technical personnel.
39
Excessive
current
instantaneous
value
Alarm of excessive
three-phase current
instantaneous value when
Ia, Ib and Ic are not
running
Request for maintenance of professional
and technical personnel.
42
Braking IGBT
short circuit
protection
Braking resistor has short
circuit
Request for maintenance of professional
and technical personnel.
43
Communicati
on error
Communication
disconnection
No communication data
received at a fixed time
Check the communication signal line
44
Fault of drive
board
communicatio
n
Connection between the
main control board and
the driver board is
abnormal
Check whether the drive board cable is
connected properly
45
I2t
instantaneous
overcurrent
value
IGBT overheating
Request for maintenance of professional
and technical personnel.
46
I2t valid
overcurrent
value
IGBT overheating
Request for maintenance of professional
and technical personnel.
47
Analog input
error
Disconnected analog input
signal
Abnormal analog input
signal
1. Modify related parameters
2. Check the analog input signal
48
Fault of
POWERID
Abnormal drive board
program
Check whether the drive board updates the
program normally or whether the drive
board chip works normally
49
Fault of
wave-by-wav
e current
limiting
Abnormal load
Abnormal drive control
Check whether the load or motor control is
abnormal
51
Running
output current
error
Improper parameter
settings
Disconnection between
the inverter and the motor
Failure of inverter
hardware
Check the parameter P70.21
Check the connecting line
Request for maintenance of professional
and technical personnel.
52
Abnormal
drive 15 V
power supply
Abnormal drive board
power circuit
Request for maintenance of professional
and technical personnel.
53
Abnormality
of braking
resistor wiring
Brake resistor connecting
terminal position error
Check whether the breaking resistor wiring
is abnormal
54
Fault of
Abnormal power grid
Power grid voltage imbalance too large