A-TS
77
https://a-ts.cn/en/
Fault
code
Display
code
Fault
description
Possible reasons
Actions
The inverter is
re-started with a
rotating motor
Start when the
motor stops
Low AC supply voltage
Check the AC
supply voltage
Too heavy load
Select the
inverter with
larger power
F.oL2
.
Motor Overload
Improper V/F curveV/F
Set V/F curve and
torque boost
value correctly
Low AC supply voltage
Check the AC
supply voltage
Common moter
operating at low
speed, large load for
long time
Select special
motor for such
operating
condition
Incorrect setting of
motor overload
protection factor
Correct the
setting
Motor blocked or load
sudden change
Check the load
F.Ed
.
Emergency stop
or external
equipment fails
Press STOP key when
operating at
non-keypad mode
Check the
present operating
mode
Press STOP when the
inverter is in stall
status
Set the operating
parameters
correctly
The inverter will report
F.Ed fault if it is in stall
status for 1 minute
Set the operating
parameters
correctly
Terminal used for
stopping the inverter in
an emergency is
closed
Disconnect the
terminal if the
external fault is
cleared
F.EEP
.
EEPROM R/W
fault
R/W fault of control
parameters
Press
STOP/RESET to
reset
F.485
.
RS485
Wrong baud rate
setting
Set the baud rate
correctly
