Filter
Top Products
Troubleshooting 9-5
9.5.3 Fault Descriptions
Table 9.1 – Fault Descriptions
Fault Code/
Display
Fault Descriptions
Overcurrent The drive diables when the output current is
detected at a level higher than the inverter rated
current.
Ground fault
current
The drive disables when a ground fault occurs
and the ground fault current is greater than the
internal setting value of the inverter.
Inverter
Overload
The drive disables its output when the output
current of the inverter is greater than the rated
level.
Overload trip The drive disables if the output current of the
inverter is at 150% of the inverter rated current
for more than the current limit time (1 min).
Inverter
overheat
The drive disables if the heat sink overheats due
to a damaged cooling fan or a blockage in the
cooling fan by detecting the temperature of the
heat sink.
Output Phase
loss
The drive disables its output when one or more
of the output (U, V, W) phases is open. The drive
detects the output current to check the output
phase loss.
Over voltage The drive disables its output if the DC bus
voltage increases above the bus overvoltage
threshold. This fault can also occur due to a
surge voltage generated at the input terminals.
Low voltage The drive disables its output if the DC bus
voltage is less than the undervoltage threshold
because insufficient torque or overheating of the
motor can occur when the input voltage of the
drive is too low.
Electronic
Thermal
The internal electronic thermal of the drive
determines the motor heat. If the motor is
overloaded the inverter disables the output. The
drive cannot protect the motor when controlling a
motor having more than 4 poles or multiple
motors.
Input phase
loss
Drive output is disabled when one of the input
phases (R, S, T) is open.
Self-
diagnostic
malfunction
Displayed when IGBT damage, output phase
short, output phase ground fault or output phase
open occurs.