Specifications

60
Protective Functions
Fault Detection
When the inverter detects a fault, the fault contact output operates, and the inverter is shut OFF causing the motor to coast to
stop. (The stopping method can be selected for some faults, and the selected stopping method will be used with these faults.)
A fault code is displayed on the digital operator.
Use one of following methods to reset after restarting the inverter.
・Set a multi-function input (H1-01 to H1-10) to 14 (Fault Reset) and turn ON the error reset signal.
・Press the
p
key on the digital operator.
・Turn the main circuit power supply OFF and then ON again.
Overcurrent （OC）
Ground Fault （GF）
Fuse Blown （PUF）
Main Circuit
Overvoltage （OV）
The inverter output current exceeded the overcurrent detection level. (200 ％ of rated current)
OC
Over Current
GF
Ground Fault
PUF
Main IBGT
Fuse Blown
OV
DC Bus
Fuse Open
UV1
DC Bus
Undervolt
UV2
CLT PS
Undervolt
UV3
MC
Answerback
PF
Input Pha
Loss
LF
Output Pha
Loss
OH3
Motor
Overheat 1
OH4
Motor
Overheat 2
RH
DynBrk
Resistor
RR
DynBrk
Trasistr
OL1
Motor
Overloaded
OL2
Inv
Overloaded
OL3
Overtorque
Det 1
OL4
Overtorque
Det 2
UL3
Undertorq
Det 1
UL4
Undertorq
Det 2
CF
Out of Control
OS
Overspeed
Det
DEV
Speed Deviation
PGO
PG Open
OL7
HSB-OL
OH(OH1)
Heatsnk Overtemp
The ground fault current at the inverter output exceeded approx. 50 ％ of the rated output current.
The fuse in the main circuit is blown.
The main circuit DC voltage exceeded the overvoltage detection level.
200 V class: approx. 410 V, 400 V class: approx. 820 V
The main circuit DC voltage detection level setting (L2-05).
200 V class: approx. 190 V, 400 V class: approx. 380 V
The control power supply voltage dropped.
The MC did not respond for 10 s even though the MC-ON signal has been output.
(200 V class: 30 to 110 kW, 400 V class: 55 to 300 kW)
The main circuit DC voltage oscillates unusually. (Detected when L8-05 = 1)
An open-phase occurred at the inverter output. (Detected when L8-07 = 1 or 2)
Fault Display Meaning
The temperature of the inverter
,
s cooling fins exceeded the setting in L8-02 or 105 ℃.
(OH: Exceeded the setting in L8-02 [L8-03 = 0 to 2], OH1: Exceeded 105 ℃) Inverter
,
s cooling fan stopped.
The inverter will stop or continue to operate according to the setting of L1-03.
The inverter will stop according to the setting of L1-04.
The protection function has operated if it has been enabled in L8-01.
The braking transistor in not operating properly.
The motor overload protection function has operated based on the internal electronic thermal value.
The inverter overload protection function has operated based on the internal electronic thermal value.
There has been a current greater than the setting in L6-02 for longer than the time set in L6-03.
There has been a current greater than the setting in L6-05 for longer than the time set in L6-06.
The output frequency did not change for longer than the time set in N3-04.
There has been a current less than the setting in L6-02 for longer than the time set in L6-03.
There has been a current less than the setting in L6-05 for longer than the time set in L6-06.
The speed has been higher than the setting in F1-08 for longer than the time set in F1-09.
PG pulses were not input when the inverter was outputting a frequency.
The speed deviation has been greater than the setting in F1-10 for longer than the time set in F1-11.
The torque limit was reached continuously for 3 seconds or longer during a deceleration stop at
open-loop vector control 1.
A speed estimation fault is detected at open-loop vector control 2.
Main Circuit Undervoltage
Main Circuit MC
Operation Fault （UV1）
Control Power Fault （UV2）
Inrush Prevention
Circuit Fault （UV3）
Main Circuit
Voltage Fault （PF）
Output Open-phase （LF）
Cooling Fin
Overheating （OH，OH1）
Motor Overheating
Alarm （OH3）
Motor Overheating
Fault （OH4）
Mounting Type Braking
Transistor Overheating （RH）
Built-in Braking
Resistor Fault （RR）
Motor Overload （OL1）
Inverter Overload （OL2）
Overtorque
Detected 1 （OL3）
Overtorque
Detected 2 （OL4）
High-slip
Braking OL （OL7）
Undertorque
Detected 1 （UL3）
Undertorque
Detected 2 （UL4）
Overspeed （OS）
PG Disconnection
Detected （PGO）
Excessive Speed
Deviation （DEV）
Control Fault （CF）