VFD-V Series
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
7-4
Code Displayed Error Explanations Treatments
AC drive’s detection circuit
fault
Return to the factory
When this function is set for
the external multi-function
input terminals (MI1~MI6),
the AC drive will stop the
output
After the signal source is
eliminated, “bb” disappeared
immediately
SC: loading with short
circuit
Output side of the AC drive
is short circuited
Check whether the motor’s
resistance and insulation are
functioning right
Braking transistor fault
Return to the factory
Braking transistor
over-heat
Check the fan and the ambient
temperature
Review the braking time and the
braking resistor’s rate of usage
Broken fuse
The transistor module of
the main circuit is broken
A fused DC circuit fuse
Check whether the fuse of the
transistor module is functioning
right
Check whether the loading side is
short circuited or grounded
The A/D1 changer within
the CPU is defected
Replace the controller or the
current sensor
The A/D2 changer within
the CPU is defected
Replace the controller or the
current sensor
PID motion error
Check the PID feedback wiring
Check whether the setting of the
parameter is appropriate
ACI with a broken cord
Check the wiring of ACI
Current message error
while the drive is stopped
Return to the factory
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