Instruction manual

9 - 5
9. TROUBLESHOOTING
Display Name Definition Cause Action
1. Regenerative brake option is not
used.
Use the regenerative brake option.
2. Though the regenerative brake
option is used, the parameter
No.PA02 setting is "
00 (not
used)".
Setcorrectly.
3. Lead of built-in regenerative brake
resistor or regenerative brake option
is open or disconnected.
1. Change lead.
2. Connect correctly.
4. Regenerative transistor faulty. Change servo amplifier
5. Wire breakage of built-in
regenerative brake resistor or
regenerative brake option
1. For wire breakage of built-in regenerative
brake resistor, change servo amplifier.
2. For wire breakage of regenerative brake
option, change regenerative brake option.
6. Capacity of built-in regenerative
brake resistor or regenerative brake
option is insufficient.
Add regenerative brake option or increase
capacity.
7. Power supply voltage high. Review the power supply.
AL.33 Overvoltage Converter bus
voltage exceeded
400VDC.
8. Ground fault occurred in servo
motor power (U, V, W).
Correct the wiring.
1. Pulse frequency of the command
pulse is too high.
Change the command pulse frequency to a
proper value.
2. Noise entered command pulses. Take action against noise.
AL.35 Command pulse
frequency error
Input pulse frequency
of the command
pulse is too high.
3. Command device failure Change the command device.
1. Servo amplifier fault caused the
parameter setting to be rewritten.
Change the servo amplifier.
2. Regenerative brake option not used
with servo amplifier was selected in
parameter No.PA02.
Set parameter No.PA02 correctly.
AL.37 Parameter error Parameter setting is
wrong.
3. The number of write times to EEP-
ROM exceeded 100,000 due to
parameter write, etc.
Change the servo amplifier.
1. Servo amplifier faulty. Change the servo amplifier.
2. The power supply was turned on
and off continuously by overloaded
status.
The drive method is reviewed.
3. Ambient temperature of servo motor
is over 55
.
Review environment so that ambient
temperature is 0 to 55 .
AL.45 Main circuit
device overheat
Main circuit device
overheat
4. Used beyond the specifications of
close mounting.
Use within the range of specifications.
1. Ambient temperature of servo motor
is over 40
.
Review environment so that ambient
temperature is 0 to 40 .
2. Servo motor is overloaded. 1. Reduce load.
2. Review operation pattern.
3. Use servo motor that provides larger
output.
AL.46 Servo motor
overheat
Servo motor
temperature rise
actuated the thermal
sensor.
3. Thermal sensor in encoder is faulty. Change servo motor.
Cooling fan life expiration (Refer to
Section 2.5.)
Change the cooling fan of the servo
amplifier.
Foreign matter caught in the fan
stopped rotation.
Remove the foreign matter.
AL.47 Cooling fan
alarm
The cooling fan of
the servo amplifier
stopped, or its speed
decreased to or
below the alarm
level.
The power supply of the cooling fan
failed.
Change servo amplifier.