10. Troubleshooting and Maintenance
10-1
Chapter 10
–
Troubleshooting and Maintenance
10.1 Fault Display
CAUTION
When a fault occurs, the inverter turns off its output and displays the fault status described below. In this
case, 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.
Protective
function
Keypad
display
Type
Description
Over Current Over Current Latch
The inverter turns off its output when the output current of the inverter flows
more than 200% of the inverter rated current.
Ground Fault
Protection
Ground Fault Latch
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
Over voltage
protection
Over Voltage Latch
The inverter turns off its output if the DC voltage of the main circuit increases
higher than the rated value (200V class: 400V DC, 400V class: 820 V DC) 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.
Low Voltage
Protection
Low Voltage Level
The inverter turns off its output if the DC voltage is below the detection level
(200V class: 180Vdc, 400V class: 360Vdc) because insufficient torque or over
heating of the motor can occurs when the input voltage of the inverter drops.
Overload
Protection
Over Load Latch
The inverter turns off its output if the output current of the inverter flows at
180% of the inverter rated current for more than the current limit time (S/W).
Inverter
Overload
Inv OLT
Latch
The inverter turns off its output when the rated current of the inverter flows more
than regulation level(150% for 1 minute-Inversely proportional to time).
Heat Sink
Over Heat
InvOver Heat Latch
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.
OHD Open
*1)
Latch
The inverter turns off its output when OHD is opened and the heat sink is
overheated.
Inverter NTC
Thermistor
Open
InvThem OP Latch When inverter NTC Thermistor is open, inverter stops its output.
Motor overheat
MotOver
Heat
Latch
When motor temp exceeds 150
℃
, inverter stops its output to protect motor
from overheated.
Motor
Thermistor Error
MotThem Err Latch
When there is an error in Thermistor that measures the temperature of motor,
inverter stops its output. (Error
—
NTC: open)
Electronic
Thermal
E-Thermal Latch
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: 150% for 1 min.
External fault B External-B Latch
Use this function if the user needs to turn off the output by an external fault
signal.
*1) It only comes under SV2800 ~ 3750iV5.
Содержание LSLV-iV5 Series
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