V&T E5 Series User Manual page 138

E5 Series High Performance Universal Inverter
Fault
Fault
display Fault description
No.
on panel
Abnormal output
T3 E.oLF
phase loss
T4 E.EEP EEPROM failure
Pre-charging
T5 E.dL3 contactor
contact failure
Temperature
T6 E.dLT
disconnection
Encoder cable
T7 E.dLT
disconnection
+T0V power
T8 E.PT0
output abnormal
Analog input
T9 E.AIF
abnormal
Motor over
30 E.Ptc
temperature(PTC)
Communication
abnormal T
3T E.SET
(Operation panel
Abnormal connection, missing
connection or disconnection at the
output side
Imbalance of output three phases
EEPROM reading and writing
failure
Loose connection inside the
inverter
Abnormal snubber circuit
Ambient under temperature
sensor
The temperature sampling circuit
inside the inverter is faulty
Encoder connection is incorrect
Encoder has no signal output
Encoder cable disconnection
Abnormal parameter setting
+T0V power overload
+T0V and GND is short circuited
+T0V power terminal circuit failure
Analog input voltage is too large
Analog input circuit failure
Analog input circuit signal is
interfered
The motor temperature signal
reaches the alarm setting value
Thermistor resistance failure
The sensor protection threshold of
the motor is set improperly
The communication of operation
panel RS485 is disconnected
Communication failure of
operation panel RS485
RS485)
The inverter is set to master mode
Chapter 7 Troubleshooting
Possible causes
User's Manual
Corrective actions
Check the three phase output
whether exits missing connection
or disconnection
Check whether motor is kept well
Switch off the power supply to
check whether the terminal
characteristics at the output side
and DC side are consistent
Seek for technical support
Ask professional technicians to
maintain
Seek for technical support
Check whether the ambient
temperature complies with the
requirements
Seek for technical support
Change the encoder cable
connection
Check whether the encoder and
power supply are normal.
Reconnect
Confirm the relevant parameters of
encoder are set properly
Increase +T0V power load
impedance
Use externally independent power
supply
Eliminate the short circuit failure
Seek for technical support
Check whether the analog input
voltage complies with the
requirements
Seek for technical support
Increase the P6.TT ~ P6.T4 AI filter
time
Strengthen ventilation and heat
dissipation
Check the thermistor
Adjust the sensor protection
threshold of the motor
Check the connection of the
equipment communications
Check whether the data receiving
and transmission complies with the
protocol, whether the check sum is
correct and whether the receiving
and transmission interval complies
with the requirements
Set the inverter to slave mode
125