V&T E5 Series User Manual page 139

Fault
Fault
display Fault description
No.
on panel
Communication
3T E.SET
33 E.VEr
34 E.CPy
Expansion card
36 E.dL4
Terminal mutual
37 E.IoF exclusion check
38 E.oL3
63 −LU−
126
E5 Series High Performance Universal Inverter
The communication of terminal
RS485 is disconnected
The baud rate is set improperly
Communication failure of terminal
RS485
abnormal T
(Terminal 485)
The communication of terminal
RS485 is time−out
Improper setting of failure alarm
parameters
The inverter is set to master mode
Version Incompatible software version of
incompatibility the operation panel
The data error when uploading
The data error when downloading
Copy fault
Operation panel no parameters is
uploaded
Software version incompatible
Expansion card disconnection
connection
abnormal
Expansion card failure
The functions of XT to X7, AIT, AIT
and DI terminals are set a same
failed function
Abnormal load
Hardware
overload Abnormal input power supply
protection
Output failure
The power supply voltage is lower
than the minimum operating
Power supply
voltage
under voltage
Abnormal internal switching power
supply
Possible causes
Chapter 7 Troubleshooting
User's Manual
Corrective actions
Check the connection of the
equipment communications
Set compatible baud rate
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
Check whether the communication
timeout is set properly and confirm
the communication cycle of the
application program
Adjust the failure alarm parameter
Set the inverter to slave mode
Seek for technical support
Check connection of operation
panel
Check connection of operation
panel
Upload the parameters to operation
panel first
Check if dT.09 is consistent
Ask professional technicians to
maintain
Seek for technical support
Modify the settings of XT to X7,
AIT, AIT and DI terminals and
ensure the setting functions are not
repeated (excluding null function)
Check whether motor is stalled
Replace inverter with higher model
Check whether there is phase loss
Check whether the output phase
loss or short circuit
Check input power supply
Seek for technical support