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Current
detection
failure
FU18
The hall is abnormal.
Replace the hall.
The drive board is
abnormal.
Replace the drive board.
Motor self-
learning
malfunction
FU19
Motor parameters are not
set
according to nameplate.
Set motor parameters correctly
according to nameplate.
Motor auto-tuning times
out.
Check the cable connecting AC drive
and motor.
The encoder is abnormal.
Check whether P1-27 (encoder
pulses per revolution) is set
correctly. Check whether signal lines
of encoder are connected correctly
and securely.
Encoder
fault
FU20
Encoder is not matched.
Set the type of encoder correctly.
Encoder wiring is incorrect.
Check the PG card power supply and
phase sequence.
Encoder is damaged.
Replace encoder.
PG card is abnormal.
Replace PG card.
EEPROM
read-write
fault
FU21
The EEPROM chip is
damaged.
Replace the main control board.
Short
circuit to
ground
FU23
Motor is short circuited to
the ground.
Replace cable or motor.
Accumulati
ve running
time
reached
FU26
Accumulative running time
reaches the setting value.
Clear the record through parameter
initialization.
User-
defined
fault 1
FU27
User-defined fault 1 is input
via S.
Reset the operation.
User-
defined
fault 2
FU28
User-defined fault 2 is input
via virtual S
Reset the operation.
Accumulati
ve power
reach error
FU29
Accumulative power-on
time reached
Use the parameter initialization
function
to
clear
the
record
information
Load loss FU30 Working current <P9-64
Check whether the load is off or P9-
64, P9-65 parameter set Whether to
meet the actual operating conditions
PID
feedback
lost during
running
FU31
PID feedback <PA-26 set
value
Check PID feedback or set
P
A-26
properly.