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11. TROUBLESHOOTING
Display Name
Definition Cause
Action
A37 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. Value outside setting range has
been set in electronic gear.
Set parameters No.PA06, PA07 correctly.
4. Opposite sign has been set in
software limit increasing side
(parameters No.PC31, PC32).
Similarly, opposite sign has been set
in software limit decreasing side
(parameters No.PC33, PC34).
Set parameters No.PC31 to PC34 correctly.
5. Opposite sign has been set in
position range output address
increasing side (parameters No.
PC37, PC38). Similarly, opposite
sign has been set in position range
output address decreasing side
(parameters No.PC39, PC40).
Set parameters No.PC37 to PC40 correctly.
6. The number of write times to EEP-
ROM exceeded 100,000 due to
parameter write, etc.
Change the servo amplifier.
7. The torque limit switching dog
system or torque limit switching data
set system is selected for home
position return in the point table
positioning operation. (Parameter
No.PC02)
These home position return types cannot be
used. Set the parameter No.PC02 correctly.
Point table setting is
wrong.
8. Setting value is out of the setting
range.
Set it correctly.
A45 Main circuit
device overheat
Main circuit device
overheat.
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
(131 ).
Check environment so that ambient
temperature is 0 to 55 (32 to 131 ).
4. Used beyond the specifications of
close mounting.
Use within the range of specifications.
A46 Servo motor
overheat
1. Ambient temperature of servo
motor is over 40
(104 ).
Check environment so that ambient
temperature is 0 to 40 (32 to 104 ).
Servo motor
temperature rise
actuated the thermal
sensor.
2. Servo motor is overloaded. 1. Reduce load.
2. Check operation pattern.
3. Use servo motor that provides larger
output.
3. Thermal sensor in encoder is
faulty.
Change the servo motor.
A47 Cooling fan
alarm
1. Cooling fan life expiration (Refer to
section 2.5.)
Change the cooling fan of the servo
amplifier.
2. Foreign matter caught in the
cooling fan stopped rotation.
Remove the foreign matter.
The cooling fan of
the servo amplifier
stopped, or its speed
decreased to or
below the alarm
level.
3. The power supply of the cooling
fan failed.
Change the servo amplifier.