13. Troubleshooting & Maintenance

13.Troubleshooting & Maintenance

13.1Protective functions

WARNING

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

Descriptions

display

functions

 

 

Overcurrent

The inverter turns off its output when the output current of the inverter flows more than

 

200% of the inverter rated current.

 

 

 

 

Ground

fault

The inverter turns off its output when a ground fault occurs and the ground fault current is

 

current

 

more than the internal setting value of the inverter.

 

Inverter

 

The inverter turns off its output when the output current of the inverter flows more than

 

Overload

 

the rated level (150% for 1 minute).

 

Overload trip

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).

 

 

 

 

Heat

sink

The inverter turns off its output if the heat sink overheats due to a damaged cooling fan

 

overheat

 

or an alien substance in the cooling fan by detecting the temperature of the heat sink.

 

DC

link

The inverter turns off its output when it is time to replace the old DC link capacitor to a

 

capacitor

 

new one.

 

overload

 

 

 

Output

Phase

The inverter turns off its output when the one or more of the output (U, V, W) phase is

 

loss

 

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

 

Over voltage

400 V when the motor decelerates. This fault can also occur due to a surge voltage

 

 

 

generated at the power supply system.

 

Low voltage

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.

 

 

 

 

Electronic

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

 

Thermal

 

 

 

motor when driving a motor having more than 4 poles or multi motors.

 

 

 

 

Parameter

This fault message is displayed when user-setting parameters fails to be entered into

 

save error

memory.

13-1

SV-iC5

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LG Electronics SV-iC5 Series manual Troubleshooting & Maintenance

SV-iC5 Series specifications

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