Error code Problem Possible causes
Overcurrent during
acceleration
Overcurrent flowing
in element during
acceleration
Overcurrent during
deceleration
Overcurrent flowing
in element during
decelearion
Overcurrent during
constant speed operation
Overcurrent flowing in
element during operation
Ground fault trip
Arm overcurrent at
start-up(for 11 and
15 kW models only)
Overcurrent (An
overcurrent on the
load side at start-up)
Arm overcurrent at
start-up
Input phase failure
Output phase failure
Overvoltage during
acceleration
Overvoltage during
deceleration
Overvoltage during
constant-speed
operation
Inverter overload
Motor overload
Error code Problem Possible causes
Dynamic braking
resistoroverload trip
Over-torque trip
Overheat
External thermal trip
Emergency stop
EEPROM fault 1
EEPROM fault 2
EEPROM fault 3
Main unit RAM fault
Main unit ROM fault
CPU fault 1
Remote control
error
Current detector
fault
Optional circuit
board format error
Low-current
operation
Trip
Undervoltage
trip(main circuit)
Ground fault trip
Auto-tuning error
Invertertype error
Brea in analog
signal cable
CPU
communications
error
Excessive torque
boosted
CPU fault 2
OL 1
OC IP
OC2
OC2P
OC3
OC3P
OC1P
OC2P
OC3P
OCL
OCA
*
EPHI
*
EPHO
OPI
OP2
OP3
OL1
OL2
OLr
*
Ot
OH
OH2
E
EEP1
EEP2
EEP3
Err2
Err3
Err4
Err5
Err7
Err8
*
UC
*
UPI
EF2
etnI
etyp
*
E-18
E-19
e-20
e-21
· The acceleration time acc is too short.
· The V/F setting is improper.
· A restart signal is imput to the rotating
motor after a momentary stop, etc.
· A special motor (e.g. motor with a small
impedance) is used.
· The deceleration time dec is too short.
· The load fluctuates abruptly.
· The load is in an abnormal condition.
· A current leaked from an output cable or
the motor to ground.
· A main circuit elements is defective.
· The insulation of the output main circuit or
motor is defective.
· The motor has too small impedance.
· A 11 or 15 kW model was started,
although a current is leaked from an
output cable or the motor to ground.
· A main circuit elements is defective.
· A phase failure occured in the input line of
the main circuit.
· The capacitor in the main circuit lacks
capacitance.
· A phase failure occurred in the output line
of the main circuit.
· The imput voltage fluctuates abnormally.
1. The power supply has a capacity of
200kVA or more.
2. A power factor improvement capacitor
is opened or closed.
3.
A system using a thyrister is connected
to the same power distribution line.
· A restart signal is input to the rotating
motor after a momentary stop, etc.
· The deceleration time dec is too short.
(Regenerative energy is too large.)
· f304 (dynamic braking resistor) is off.
· f305 (overvoltage limit operation) is off.
· The input voltage fluctuates abnormally.
1. The power supply has a capacity of
200kVA or more.
2. A power factor improvement capacitor
is opened and closed.
3. A system using a thyrister is connected
to the same power distribution line.
· The input voltage fluctuates abnormally.
1. The power supply has a capacity of
200kVA or more.
2. A power factor improvement capacitor
is opened or closed.
3. A system using a thyrister is connected
to the same power distribution line.
· The motor is in a regenerative state
because the load causes the motor to run
at a frequency higher than the inverter
output frequency.
· The acceleration time ACC is too short.
· The DC braking amout is too large.
· The V/F setting is improper.
· A restart signal is input to the rotating
motor after a momentary stop, etc.
· The load is too large.
· The V/F setting is improper.
· The motor is locked up.
· Low·speed operation is performed
continuously.
· An excessive load is applied to the motor
during operation.
· The deceleration time is too short.
· Dynamic braking is too large.
· Over-torque reaches to a detection level
during operation.
· The cooling fan does not rotate.
· The ambient temperature is too high.
· The vent is blocked up.
· A heat generating device is installed close
to the inverter.
· The thermistor in the unit is broken.
· An external thermal trip is input.
· During automatic operation or remote
operation, a stop command is entered
from the operation panel or a remote input
device.
· A data writing error occurs.
· Power supply is cut off during typ
operation and data writing is aborted.
· A data reading error occurred.
· The control RAM is defective.
· The control ROM is defective.
· The control CPU is defective.
· An error arises during remote operation.
· The current detector is defective.
· An optional circuit board in a different
format is installed.
· The output current decreased to a low-
current detection level during operation.
· The input voltage (in the main circuit) is
too low.
· A ground fault occurs in the output cable
or the motor.
· Check the motor parameter f401 to f494.
· The motor with the capacity of 2 classes
or less than the inverter is used.
· The output cable is too thin.
· The motor is rotating.
· The inverter is used for loads other than
those of three-phase induction motors.
· Circuit board is changed. (Or main
circuit/drive circuit board)
· The signal input via VRF is below the
analog sinal detectio level set with f633.
· A communications error occurs between
control CPUs.
· The torque boost parameter vb is set
too
high.
· The motor has too small impedance.
· The control CPU is defective.
To Next Page
Loading...
Need help?
General
