7-4
Fault
Name
Fault Descriptions
Corrective Actions
Ground fault :
The AC drive output is
abnormal. When the output
terminal is grounded (short
circuit current is 50% more than
the AC drive rated current), the
AC drive power module may be
damaged. The short circuit
protection is provided for AC
drive protection, not user
protection.
Ground fault :
1. Check whether the IGBT power module is
damaged.
2. Check for possible poor insulation at the
output line.
Communication Error
Please refer to Pr.92.
1. Check the connection between the AC drive
and computer for loose wires.
2. Check if the communication protocol is
properly set.
External Base Block.
AC drive output is turned off.
1. When the external input terminal (base-block)
is active, the AC drive output will be turned
off.
2. Disable this connection and the AC drive will
begin to work again.
OC hardware error
CC (current clamp)
OV hardware error
GFF hardware error
OV or LV
Current sensor error
Return to the factory.
B550 Series sensorless vector frequency drive
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