www.a-ts.cn A-TS Technology
FT50
69
shooting, and reset the frequency converter after the fault is removed. Refer
to Chapter 7 for details.
Method of
fault reset
After the trouble shooting, reset the fault through the upper computer.
After the trouble shooting, click the reset key on the operation panel to reset.
After the trouble shooting, the required signal source can be selected through
P3813.B control word 1:4 (Fault reset). When the signal is changed from 0 to
1, the reset is triggered.
The frequency converter will be automatically reset after power on again. Cut
off the power of the main circuit temporarily, and turn on the power again
after the display on the operation panel disappears.
7.4 Common Faults and Trouble Shooting
Table 7-2 Common faults and trouble shooting
No.
Fault
phenomenon
Possible cause
Trouble shooting
1
No display after
power-on
The power supply has no voltage
or the voltage is too low
Check input power supply
Switching power supply failure on
the drive board of the frequency
converter
Check bus voltage
The connection between the
control board and the drive board
and the operation panel is
disconnected
After power off, unplug and
reconnect the connection cable
The frequency converter buffer
resistance is damaged
Consult A-TS technical support
Control panel and operation
panel failure
The rectifier bridge is damaged
2
After power on, it
always shows
undervoltage, in
standby
The power supply on the input
side is too low
Check input power
Power supply phase loss
The rectifier bridge is abnormal
Consult A-TS technical support
3
Inverter/rectifier
module overheat is
frequently reported
The carrier frequency is set too
high
Appropriately reduce the carrier
frequency (P0202.F)
The fan is not working normally
Check the fan-related wiring or
replace the fan
The internal components of the
frequency converter are
damaged
Consult A-TS technical support
