9 - 5
9. TROUBLESHOOTING
Display Name
Definition
Cause
Action
1. Short occurred in servo motor
power (U, V, W).
Correct the wiring.
AL.32 Overcurrent
2. Transistor (IPM IGBT) of the
servo amplifier faulty.
Checking method
Alarm (AL.32) occurs if power is
switched on after U,V and W are
disconnected.
Change the servo amplifier.
3. Ground fault occurred in servo
motor power (U, V, W).
Correct the wiring.
Current that flew is
higher than the
permissible current
of the servo
amplifier. (When
the alarm (AL.32)
occurs, switch the
power OFF and
then ON to reset
the alarm. Then,
turn on the servo-
on. When the alarm
(AL.32) still occurs
at the time, the
transistor (IPM
IGBT) of the servo
amplifier may be at
fault. Do not switch
the power OFF/ON
repeatedly; check
the transistor
according to the
cause 2 checking
method.)
4. External noise caused the
overcurrent detection circuit to
misoperate.
Take noise suppression measures.
AL.33
Overvoltage
1. Regenerative option is not used.
Use the regenerative option.
2. Though the regenerative option is
used, the parameter No.PA02
setting is " 00 (not used)".
Set correctly.
3. Lead of built-in regenerative
resistor or regenerative option is
open or disconnected.
1. Change lead.
2. Connect correctly.
Converter bus
voltage input value
has become the
following.
MR-J3- A(1):
400VDC or more
MR-J3- A4:
800VDC or more
4. Regenerative transistor faulty.
Change servo amplifier
5. Wire breakage of built-in
regenerative resistor or
regenerative option
1. For wire breakage of built-in
regenerative resistor, change servo
amplifier.
2. For wire breakage of regenerative
option, change regenerative option.
6. Capacity of built-in regenerative
resistor or regenerative option is
insufficient.
Add regenerative option or increase
capacity.
7. Power supply voltage high.
Review the power supply.
8. Ground fault occurred in servo
motor power (U, V, W).
Correct the wiring.
AL.35
1. Pulse frequency of the command
pulse is too high.
Change the command pulse frequency to a
proper value.
Command
pulse frequency
error
2. Noise entered command pulses.
Take action against noise.
Input pulse
frequency of the
command pulse is
too high.
3. Command device failure
Change the command device.
AL.37
Parameter error Parameter setting is
wrong.
1. Servo amplifier fault caused the
parameter setting to be rewritten.
Change the servo amplifier.
2. Regenerative option not used with
servo amplifier was selected in
parameter No.PA02.
Set parameter No.PA02 correctly.
3. The number of write times to EEP-
ROM exceeded 100,000 due to
parameter write, etc.
Change the servo amplifier.
Содержание MELSERVO MR-J3 A Series
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