Mitsubishi Electric MR-J2S-CP Instruction Manual page 237

11. TROUBLESHOOTING
Display Name
AL.32 Overcurrent Current that flew is
higher than the
permissible current
of the servo
amplifier. (If the
alarm (AL.32) occurs
again when turning
ON the servo after
resetting the alarm
by turning OFF/ON
the power when the
alarm (AL.32) first
occurred, the
transistor (IPM,
IGBT) of the servo
amplifier may be at
fault. In the case, do
not repeat to turn
OFF/ON the power.
Check the transistor
with the checking
method of "Cause
2".)
Converter bus
AL.33 Overvoltage
voltage exceeded
400VDC.
Input pulse
AL.35 Command pulse
frequency of the
frequency error
command pulse is
too high.
Definition
1. Short occurred in servo amplifier
output phases U, V and W.
2. Transistor (IPM) of the servo
amplifier faulty.
Alarm (AL.32) occurs if power is
switched on after U,V and W
are disconnected.
3. Ground fault occurred in servo
amplifier output phases U, V and
W.
4. External noise caused the
overcurrent detection circuit to
misoperate.
1. Regenerative option is not used.
2. Though the regenerative option is
used, the parameter No. 0 setting
is " 0
3. Lead of built-in regenerative
resistor or regenerative option is
open or disconnected.
4. Regenerative transistor faulty.
5. Wire breakage of built-in
regenerative resistor or
regenerative option
6. Capacity of built-in regenerative
resistor or regenerative option is
insufficient.
7. Power supply voltage high.
8. The jumper across BUE-SD of the
FR-BU2 brake unit is removed.
1. Pulse frequency of the manual
pulse generator is too high.
2. Noise entered the pulses of the
manual pulse generator.
3. Manual pulse generator failure
Cause
Checking method
(not used)".
11 - 6
Action
Correct the wiring.
Change the servo amplifier.
Correct the wiring.
Take noise suppression measures.
Use the regenerative option.
Make correct setting.
1. Change lead.
2. Connect correctly.
Change servo amplifier
1. For wire breakage of built-in
regenerative resistor, change servo
amplifier.
2. For wire breakage of regenerative
option, change regenerative option.
Add regenerative option or increase
capacity.
Review the power supply.
Fit the jumper across BUE-SD.
Change the pulse frequency to a proper
value.
Take action against noise.
Change the manual pulse generator.