Troubleshooting & Maintenance - LG SV-iC5 Series Instruction Manual

13. Troubleshooting & Maintenance
13.1 Protective functions
When a fault occurs, the cause must be corrected before the fault can be cleared. If protective function keeps active, it
could lead to reduction in product life and damage to the equipment.
Fault Display and information
Keypad Protective
display functions
Overcurrent
Ground
current
Inverter
Overload
Overload trip
Heat
overheat
DC
capacitor
overload
Output Phase
loss
Over voltage
Low voltage
Electronic
Thermal
Parameter
save error
The inverter turns off its output when the output current of the inverter flows more than
200% of the inverter rated current.
fault The inverter turns off its output when a ground fault occurs and the ground fault current is
more than the internal setting value of the inverter.
The inverter turns off its output when the output current of the inverter flows more than
the rated level (150% for 1 minute).
The inverter turns off its output if the output current of the inverter flows at 150% of the
inverter rated current for more than the current limit time (1 min).
sink The inverter turns off its output if the heat sink overheats due to a damaged cooling fan
or an alien substance in the cooling fan by detecting the temperature of the heat sink.
link The inverter turns off its output when it is time to replace the old DC link capacitor to a
new one.
The inverter turns off its output when the one or more of the output (U, V, W) phase is
open. The inverter detects the output current to check the phase loss of the output.
The inverter turns off its output if the DC voltage of the main circuit increases higher than
400 V when the motor decelerates. This fault can also occur due to a surge voltage
generated at the power supply system.
The inverter turns off its output if the DC voltage is below 180V because insufficient
torque or overheating of the motor can occur when the input voltage of the inverter drops.
The internal electronic thermal of the inverter determines the overheating of the motor. If
the motor is overloaded the inverter turns off the output. The inverter cannot protect the
motor when driving a motor having more than 4 poles or multi motors.
This fault message is displayed when user-setting parameters fails to be entered into
memory.
13. Troubleshooting & Maintenance
WARNING
Descriptions
13-1
SV-iC5