59
User Manual
Fault
Code
Fault
Indi-
cation
Fault
description
Possible causes Possible solutions
9
External
Comm-
unication
failure
1. Erronous comm-
unication settings
2. Damaged
1. Crosscheck the communication
settings across all devices
communication wires connected to
the network.
2. Check the status of the wires/
cable used for communications
10
System
failure
1. Critical damage to
the system which
could cause incorrect
operation of the drive
1. Contact technical support
11
PI fault
No detection of PI
feedback signal for a
certain time
Check on PI feedback signal and
connection
7.2. Common Faults and processing schemes
• No information display after power on
Please confirm whether the voltage of power source is compatible with the rated voltage of converter.
Please check whether three-phase rectifier bridge is in good condition; if it's damaged, please seek
for technical support. Please check if power indicator is on or not; if it's off, malfunction is mainly
caused by abnormal rectifier and buffer resistance; if it's on, malfunction is mainly caused by
switching power supply. Meanwhile, please seek for technical support.
• Air switch of power source trips when power on
Please check whether power source is grounded or short-circuited; please solve it accordingly.
Contact tech support if problem persists.
• Motor doesn't start running after converter is started
Please check whether there is three-phase symmetrical output among U, V, W. If there is, motor or its
circuit is damaged mostly; or stalling may be caused by mechanical problem. please solve it
accordingly. If three phase output is unsymmetrical, then driver board or output module of converter
may be damaged. Please seek for technical support. If there is output voltage, then driver board or
output module may also be damaged. Please also seek for technical support.
• Air switch of power source trips while running
Please check whether output modules between phase and phase are short-circuited; if there is short
circuit, please seek for technical support. Please check whether motor lines are short-circuited or
grounded; if they
are, please solve it accordingly. If stripping take places sometimes, not regularly; and there is a long
distance between motor and converter, please take the installation of additional AC reactor into
consideration.
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