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9. TROUBLESHOOTING
Display Name Definition Cause Action
(Note 2)
Alarm details
AL.45 Main circuit
device overheat
Main circuit device
overheat
1. Ambient temperature of servo
amplifier is over 55
(131 ).
Check environment so that
ambient temperature is 0 to
55
(32 to 131 ).
2. Used beyond the specifications of
close mounting.
Use within the range of
specifications.
(Refer to section 2.1.)
3. The power supply was turned on and
off continuously by overloaded status.
The drive method is
reviewed.
4. Foreign matter caught in a cooling fan
or heat sinks.
Clean the cooling fan or the
heat sinks.
5. Servo amplifier fault.
(When it occurs immediately after
power-on)
Change the servo amplifier.
AL.46 Servo motor
overheat
Servo motor
temperature rise
actuated the
thermal sensor.
1. Ambient temperature of servo motor is
over 40
(104 ).
Check environment so that
ambient temperature is 0 to
40
(32 to 104 ).
1, 2, 10, 20
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. 1
AL.47 Cooling fan
alarm
The cooling fan of
the servo amplifier
stopped, or its
speed decreased
to or below the
alarm level.
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.
3. The power supply of the cooling fan
failed.
Change the servo amplifier.