Handling Methods For Alarms/Warnings; [Al. 010_Undervoltage] - Mitsubishi Electric MR-J5-G Series User Manual

1.3

Handling methods for alarms/warnings

Remove the cause of the alarm and warning in accordance with this section. MR Configurator2 can be used as reference for
the cause of a warning.

[AL. 010_Undervoltage]

• The voltage of the control circuit power supply has dropped.
• The voltage of the main circuit power supply has dropped.
[AL. 010.1_Voltage drop in the control circuit power]
Cause
1.
The control circuit power supply connection is
incorrect.
2.
The voltage of the control circuit power supply
is too low.
3.
The power was cycled before the internal
control circuit power supply stopped.
4.
An instantaneous power failure lasted for
longer than the specified time.
• When [Pr. PA20.2 SEMI-F47 function selection] is set to "0"
(disabled), the specified time is 60 ms.
• When [Pr. PA20.2] is set to "1" (enabled), the value set in [Pr.
PF25 SEMI-F47 function - Instantaneous power failure detection
time (Instantaneous power failure tough drive detection time)] is
the specified time.
[AL. 010.2_Voltage drop in the main circuit power]
Cause
1.
The main circuit power supply wiring may have
been disconnected.
2.
The wiring between P3 and P4 is
disconnected.
3.
The voltage of the main circuit power supply is
too low.
4.
When this alarm occurs, the bus voltage is too
low at acceleration.
5.
The fuse was disconnected.
6.
The power supply capacity is insufficient.
7.
Main circuit capacitor has deteriorated.
8.
The servo amplifier has malfunctioned.
1 SERVO AMPLIFIER TROUBLESHOOTING
24
1.3 Handling methods for alarms/warnings
Check/action method
Check the connection of the control circuit power supply.
Refer to "Example power circuit connections" in the following manual.
MR-J5 User's Manual (Hardware)
Check if the voltage of the control circuit power supply is equal to or lower than
the specified value.
200 V class: 160 V AC
400 V class: 280 V AC
After shutting off the servo amplifier power supply, make sure that the seven-
segment LED of the servo amplifier is turned off, then cycle the power.
Check if the power supply has a problem.
After checking, cycle the power of the servo amplifier.
Check/action method
Check the main circuit power supply wiring.
Refer to "Example power circuit connections" in the following manual.
MR-J5 User's Manual (Hardware)
Check the wiring between P3 and P4.
Refer to "Example power circuit connections" in the following manual.
MR-J5 User's Manual (Hardware)
Check if the voltage of the main circuit power supply is equal to or lower than
the specified value. When the voltage is equal to or lower than the specified
value, increase the voltage of the main circuit power supply.
200 V class: 160 V AC
400 V class: 280 V AC
Check if the bus voltage during acceleration is lower than the specified value.
If the bus voltage is lower than the specified value, increase the acceleration
time constant or the power supply capacity.
200 V class: 200 V DC
400 V class: 380 V DC
Check the charge light after a certain period of time.
Check if the specified power supply capacity is satisfied.
After checking the operation time and ambient temperature, replace the servo
amplifier if the main circuit capacitor has reached the end of its service life.
Refer to "Parts with a service life" in the User's Manual (Introduction).
Check the value of the bus voltage. If the bus voltage is lower than the
specified value even though the voltage of the main circuit power supply is
within specifications, replace the servo amplifier.
200 V class: 200 V DC
400 V class: 380 V DC
Model
[A]
[G]
[WG]
Model
[A]
[G]
[WG]
[A]
[G]
[A]
[G]
[WG]