Maeda MK0003, Service Manual, Page: 307 / 348

5-13
2.5 ALARM DISPLAY AND COUNTERMEASURE
2.5.1 ALARM DISPLAY
When the inverter detects a fault, the inverter trips and turns on the ALARM LED, and displays the alarm code. If the
increment key is pressed while the alarm is displayed, the detailed information at the time of the alarm, such as the
output frequency, current, DC voltage can be observed.
Check each signal such as the run command before releasing (resetting) the alarm.
Investigate the cause of the trip from the displayed alarm code, and remove the cause before resetting.
The parameters cannot be changed, and writing to the EEPROM with communication cannot be performed while the
inverter is tripped, so change the parameters after powering on or after resetting the trip.
In this section, the countermeasures for issues occurring after the operation of the inverter are being explained.
2.5.2 FAULT MONITOR DISPLAY
The current and past alarms can be observed in the fault monitor 1 to 6 (d081 to d086). The latest alarm is displayed
in the fault monitor 1 (d081).
Precautions
The inverter status at the time of alarm may be different from the operation observed from the motor. When the PID
control character and frequency is inputted with analogue signals, the inverter may repeat the acceleration status in
small increments due to the fluctuation of the analogue signal even when the motor seems to be running at constant
speed.
Fault monitor 1
Alarm code
Output frequency
(Hz) at the time of
alarm
Output current (A) at
the time of alarm
DC voltage (V)
between PN at the
time of alarm
Cumulative operation
(RUN) time (h) until the
alarm
Cumulative weld time (h)
until the alarm
Alarm cause Inverter status at the time of alarm
During the initialization process when
powering on or when in reset terminal on
status
Stopped
Decelerating
Constant speed
Accelerating
Running at frequency 0 Hz
Starting
DC limited
Overload limited
Not displayed on 3G3MX2 series V1 type
(“refer to 10-1-2 List of Alarm Codes
(P. 10-4)”)