EN-22
Operator Programming Errors
An Operator Programming Error (OPE) occurs when two or more parameter related to each other
are set inappropriately or an individual parameter setting is incorrect. The Inverter does not operate
until the parameter setting is corrected; however, no other alarm or fault output will occur. If an OPE
occurs, change the related parameter by checking the cause shown in the table below. When an
OPE error is displayed, press the ENTER key to see U1-34 (OPE Detected). This monitor displays
the parameter that is causing the OPE error.
Heatsink Overheat
The temperature of the Inverter’s heatsink
exceeded 105 °C.
• Check for dirt build-up on the fans or heat-
sink.
• Reduce the ambient temperature around the
drive.
• Replace the cooling fan(s).
Inverter’s Cooling Fan Stopped
Motor Overload
Detected when L1-01 is set to 1,2 or 3 and the
Inverter’s I²t value exceeded the motor overload
curve.
The overload curve is adjustable using parame-
ter
E2-01 (Motor Rated Current), L1-01 (Motor Pro-
tection Selection) and L2-02 (Motor Protection
Time Constant)
• Recheck the cycle time and the size of the
load as well as the accel/decel times (C1-
).
• Check the V/f characteristics (E1-
).
• Check the setting of Motor Rated Current
Setting (E2-01).
Inverter Overload
The Inverter output current exceeded the Invert-
ers’s overload capability
• Recheck the cycle time and the size of the
load as well as the accel/decel times (C1-
).
• Check the V/f Characteristics (E1-
).
• Check if the inverter rated current matches
the motor rated current.
(only in
stop
condi-
tio)
The DC bus voltage has exceeded the overvolt-
age detection level.
Default detection levels are:
200 V class: 410 VDC
400 V class: 820 VDC
• Increase the deceleration time (C1-02/04) or
connect a braking option.
• Check the power supply and decrease the
voltage to meet the inverter’s specifications.
• Check the braking chopper / resistor.
Input Phase Loss
Too big DC bus voltage ripple.
Only detected when L8-05=1 (enabled)
• Tighten the input terminal screws
• Check the power supply voltage
DC Bus Fuse Open
The fuse in the main circuit is blown.
Warning:
Never run the Inverter after replacing the DC
bus fuse without checking for shorted compo-
nents.
• Check the motor and the motor cables for
short circuits or insulation failures (phase-to-
phase).
• Replace the inverter after correcting the
fault.
(only in
stop
condi-
tio)
The DC bus voltage is below the Undervoltage
Detection Level
(L2-05). The default settings are:
200V class: 190 VDC
400 V class: 380 VDC
• Check the input voltage.
• Check the wiring of the input terminals.
• Check the input voltage and the wiring of the
input terminals.
• Extend the settings in C1-01/03
Main Circuit MC Operation Failure
No MC response during Inverter operation.
Replace the Inverter.
Control Power Supply Undervoltage
Undervoltage of the control circuit while the
Inverter was running.
• Remove all connection to the control termi-
nals and cycle the power to the Inverter.
• Replace the Inverter.
Display
Meaning
Corrective Actions
Inverter kVA Setting Error
Enter the correct kVA setting in o2-04.
Parameter Setting is out of its range
Verify the parameter settings.
Display
Alarm
Fault
Meaning
Corrective Actions
