Lifasa SV030iH-2U, Manual, Page: 82 / 98

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CHAPTER 6 - TROUBLESHOOTING & MAINTENANCE
6.1 Fault Display
When a fault occurs, the inverter turns off its output and displays the fault status in [DRV 05]. The last 2 faults
are saved in [I/O 46] and [I/O 47] with the operation status at the instance of fault.
Keypad Display
Protective
Function
Description
OC Tip
Over Current
Protection
The inverter turns off its output when the output current of the inverter flows more than
200% of the inverter rated current.
GF Trip
Ground Fault
Protection
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. Over current trip function may
protect the inverter when a ground fault occurs due to a low ground fault resistance.
OV Trip
Over Voltage
protection
The inverter turns off its output if the DC voltage of the main circuit increases higher
than the rated value when the motor decelerates or when regenerative energy flows
back to the inverter due to a regenerative load. This fault can also occur due to a surge
voltage generated at the power supply system.
OC Limit
Current Limit
Protection
(Overload
Protection)
The inverter turns off its output if the output current of the exceeds the value set in [FUN
49] over the time set in [FUN 50]
Fuse Open
Fuse Open
The inverter turns off its output by opening the fuse when something is wrong with the
main circuit IGBT to protect the wiring from being damaged from short currents.
Over Heat
Heat Sink
Over Heat
The inverter turns off its output if the heat sink over heats due to a damaged cooling fan
or an alien substance in the cooling fan by detecting the temperature of the heat sink.
ETH
Electronic Thermal
The internal electronic thermal of the inverter determines the over heating of the motor.
If the motor is overloaded the inverter turns off the output. The inverter cannot protect
the motor when driving a multi-pole motor or when driving multiple motors, so consider
thermal relays or other thermal protective devices for each motor.
Overload capacity: Value set in [FUN 52]
EXT Trip
External Fault Multi-function input configured as ‘EXT_TRIP’ has opened.
LV Trip
Low Voltage
Protection
The inverter turns off its output if the DC voltage is below the detection level because
insufficient torque or over heating of the motor can occurs when the input voltage of the
inverter drops.
SC Trip
IGBT Short The inverter turns off the output if an IGBT short through or an output short occurs.
BX
BX Protection
(Instant Cut Off)
Used for the emergency stop of the inverter. The inverter instantly turns off the output
when the BX terminal is turned ON, and returns to regular operation when the BX
terminal is turned OFF. Take caution when using this function.
Inv. OLT
Inverter Overload
The inverter turns off its output when the output current of the inverter flows more than
the rated level (150% for 1 minute, 200% for 0.5 seconds).
M/C Fail
Magnetic
Contactor Fail
The inverter turns off its output if the magnetic contactor does not work or CVT fuse has
opened.
To reset fault, Press
RESET
key, Close RST-CM terminals or connect input power.
If a problem persists, please contact the factory or your local distributor.