LSIS sv-ig5a, User Manual

Page: 167 / 186

12-1
CHAPTER 12 - TROUBLESHOOTING & MAINTENANCE
12.1 Protective 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
display Protective
functions
Descriptions
Overcurrent
The inverter turns off its output when the output current of the inverter
flows more than the inverter rated current.
Overcurrent2
When IGBT
‟s Arm is short and output short occurs, the inverter turns off
its output
Ground fault
current
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.
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).
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).
Inverter
overheat
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.
Output
Phase loss
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.
Over voltage
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.
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
Thermal
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.
Input phase
loss Inverter output is blocked when one of R, S, T is open or the electrolytic
capacitor needs to be replaced.
For Service Call 800-848-2504
For Service Call 800-848-2504