DMG JUNIOR 4.0 - VVVF Fault Table

User
Manual
File Name
Revision
Date
Page
93010350.EN_A_Junior 4.0 User
Manual_240828_v1.0 - VVVF
1.0
28/08/2024
70 / 90
VVVF Fault Table
Code
Description
OC1
Overcurrent during acceleration
The inverter momentary output current exceeded the
overcurrent level.
OC2
Overcurrent during deceleration
OC3
Overcurrent during running at a constant
speed
EF
Ground fault
Zero-phase current caused by ground fault in the output
circuit has exceeded the allowable limit.
(30kW or above)
OV1
Overvoltage during acceleration
The DC link bus voltage exceeded the overvoltage detection
level.
OV2
Overvoltage during deceleration
OV3
Overvoltage during running at a constant
speed
LV
Undervoltage
The DC link bus voltage dropped below the undervolt detection level.
age
Lin *
Input phase loss
An input phase loss occurred or the Interphase voltage
unbalance rate was large.
OH1
Heat sink overheat
The temperature around the heat sink has risen abnormally.
OH2
External alarm
The external alarm THR was entered.
(when the THR "Enable external alarm trip" has been
assigned to any digital input terminal)
OH3
Inverter internal overheat
The temperature inside the inverter has exceeded the
allowable limit.
OH4
Motor protection (PTC/NTC thermistor)
The temperature of the motor has risen abnormally.
DBH
Braking register overheat
The temperature of the Braking resistor has exceede allowable limit.
d the
OL1
Overload of motor 1
The electronic thermal protection for motor overload detection
was activated.
OLU
Inverter overload
The temperature inside the IGBT has risen abnormally.
OS
Over speed prevention
The motor speed is higher than maximum speed * L32.
PG
Broken wiring in the PG
The inverter detects a broken wiring connection in encoder. the
pulse
nrb
NTC wire break error
Detected a wire break in the NTC thermistor detection circuit.
Er1
Memory error
An error has occurred when writing data to the inverter
memory.
Er2
Keypad communications error
A communications error has occurred between the key and the
inverter. pad
Er3
CPU error
A CPU error or LSI error has occurred.
Er4
Option communications error
A communications error has occurred between the connected
option card and the inverter.
Er5
Option error
An error was detected by the connected option card (not by
the inverter).
Er6
Operation protection
An incorrect operation was attempted.
Er7
Tuning error
Auto-tuning or Magnetic Pole Position Offset tuning has failed,
resulting in abnormal tuning results.
Er8
RS-485 communications error (port 1)
A communications error has occurred during RS-485
communication.
ErP
RS-485 communications error (port 2)
OPL
Output phase loss
An output phase loss occurred.
ErE
Speed mismatching
The reference speed and the detection speed are different.
ErF
Data saving error during undervoltage
When the undervoltage protection was activated, the inverter
failed to save data, showing this error.