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English-
29
Fault
Name
Fault Descriptions
Corrective Actions
U-phase error
V-phase error
W-phase error
Return to the factory.
OV or LV
Current sensor
error
OH error
Return to the factory.
Software
protection failure
Return to the factory.
Password is
locked.
Keypad will be locked. Turn the power ON after power OFF to
re-enter the correct password. See Pr.00-07 and 00-08.
Auto accel/decel
failure
1. Check if the motor is suitable for operation by AC motor drive.
2. Check if the regenerative energy is too large.
3. Load may have changed suddenly.
Ground fault
When (one of) the output terminal(s) is grounded, short circuit
current is more than 50% of AC motor drive rated current, the
AC motor drive power module may be damaged.
NOTE: The short circuit protection is provided for AC
motor drive protection, not for protection of the user.
1. Check whether the IGBT power module is damaged.
2. Check for possible poor insulation at the output line.
External Base
Block.
(Refer to Pr. 08-
06)
1. When the external input terminal (B.B) is active, the AC motor
drive output will be turned off.
2. Deactivate the external input terminal (B.B) to operate the AC
motor drive again.
Analog
feedback error
or ACI open
circuit
1. Check parameter settings and wiring of Analog feedback
(Pr.10-00).
2. Check for possible fault between system response time and
the feedback signal detection time (Pr.10-08).
PG feedback
signal error
1. Check parameter settings and signal type of PG feedback
(Pr.10-10 and Pr.10-11).
2. Check if the wiring of PG card is correct.
Auto Tuning
Error
1. Check cabling between drive and motor
2. Retry again
EF when
preliminary
count value
attained
1. Check counter trigger signal
2. Check Pr.03-09, Pr.03-11setting
Under Current
1. Check Load current
2. Check Pr.06-12 to Pr.06-15 setting
Phase Loss
Check Power Source Input if all 3 input phases are connected
without loose contacts.