Chapter 6 Fault Code Information
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VFD-B Series
6-4
Revision July 2008, BE16, SW V4.08 & V5.00
Fault
Name
Fault Descriptions
Corrective Actions
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. Check
Pr.07-05
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 input phase wiring for loose contacts.
6.2 Reset
There are three methods to reset the AC motor drive after solving the fault:
1. Press
RESET
STOP
key on PU01.
2.
Set external terminal to “RESET” (set one of Pr.04-04~Pr.04-09 to 05) and then set to be ON.
3. Send
“RESET”
command by communication.
NOTE
Make sure that RUN command or signal is OFF before executing RESET to prevent damage or
personal injury due to immediate operation.
