Chapter 8 - Troubleshooting & Maintenance; Fault Display - CMC 30 HP30 Installation And Operation Instruction Manual

CHAPTER 8 -

8.1 Fault Display

When a fault occurs, the inverter turns off its output and displays the fault status in DRV-07. The last 5 faults are saved in
FU2-01 through FU2-05 with the operation status at the instance of fault.
Keypad Display
LCD 7-Segment
Over Current 1 OC1
Ground Fault
Over Voltage
Over Load OLT
Fuse Open FUSE
Over Heat
E-Thermal ETH
Ext Trip-A EXTA
Ext Trip-B EXTB
Low Voltage
Over Current 2 OC2
Out Phase Open OPO
BX
Over Speed OSPD
TROUBLESHOOTING & MAINTENANCE
Protective
Function
Over Current The inverter turns off its output when the output current of the inverter flows
Protection more than 200% of the inverter rated current.
The inverter turns off its output when a ground fault occurs and the ground fault
Ground Fault current is more than the internal setting value of the inverter. Over current trip
GF
Protection function may protect the inverter when a ground fault occurs due to a low
ground fault resistance.
The inverter turns off its output if the DC voltage of the main circuit increases
Over voltage higher than the rated value when the motor decelerates or when regenerative
OV
protection 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.
Current Limit
Protection The inverter turns off its output if the output current of the inverter flows at
(Overload 180% of the inverter rated current for more than the current limit time (S/W).
Protection)
The inverter turns off its output by opening the fuse when something is wrong
Fuse Open with the main circuit IGBT to protect the wiring from being damaged from short
currents.
The inverter turns off its output if the heat sink over heats due to a damaged
Heat Sink
OH cooling fan or an alien substance in the cooling fan by detecting the
Over Heat
temperature of the heat sink.
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
Electronic Thermal
multiple motors, so consider thermal relays or other thermal protective devices
for each motor.
Overload capacity: 150% for 1 min
Use this function if the user needs to turn off the output by an external fault
External fault A
signal. (Normal Open Contact)
Use this function if the user needs to turn off the output by an external fault
External fault B
signal. (Normal Close Contact)
The inverter turns off its output if the DC voltage is below the detection level
Low Voltage
LV because insufficient torque or over heating of the motor can occurs when the
Protection
input voltage of the inverter drops.
The inverter turns off the output if an IGBT short through or an output short
IGBT Short
occurs.
The inverter turns off its output when the one or more of the output (U, V, W)
Output Phase
phase is open. The inverter detects the output current to check the phase open
open
of the output.
Used for the emergency stop of the inverter. The inverter instantly turns off the
BX Protection
BX output when the BX terminal is turned ON, and returns to regular operation
(Instant Cut Off)
when the BX terminal is turned OFF. Take caution when using this function.
Overspeed Inverter turns off its output when the motor runs in excess of Max. speed +
Protection 20Hz.
Description
8-1