7
7-3
Fault Name
Fault Descriptions
Corrective Actions
Internal memory IC can
not be programmed.
1. Switch off power supply.
2. Check whether the input voltage falls within
the rated AC drive input voltage.
3. Switch the AC drive back on.
Internal memory IC can
not be read.
1. Check the connections between the main
control board and the power board.
2. Reset drive to factory defaults.
Drive’s internal circuitry
abnormal.
1. Switch off power supply.
2. Check whether the input voltage falls within
the rated AC drive input voltage.
3. Switch on the AC drive.
Hardware protection
failure
Return to the factory.
Software protection failure Return to the factory.
Auto accel/decel failure
Don’t use the function of auto acceleration /
deceleration.
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
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 (B.B) is
active, the AC drive output will be turned off.
2. Disable this connection and the AC drive will
begin to work again.