CHAPTER 7 MAINTENANCE AND INSPECTION
7-14
Troubleshooting Method
7
20. Encoder Overheat
[Display] [Description of detected alarm]
[Cause and remedy]
Cause Remedy
Excessive ambient temperature
Reduce the ambient temperature of the servomotor to
40°C or lower.
Remove shields interrupting heat radiation, if there
are any.
The effective torque exceeds the
rating.
Increase the cycle time and reduce the operation
frequency.
21. Absolute Data Lost
[Display] [Description of detected alarm]
[Cause and remedy]
Cause Remedy
dL1 alarm
Check for the broken wire or wrong wiring in the
encoder cable and correct.
Replace the battery.
A warning is displayed on the amplifier if the battery
voltage is low. (If PA2_78 is set at 1)
dL2 alarm
Perform position preset. If the alarm persists, replace the
servomotor.
dL3 alarm
After position preset, dL3 is cleared but the ET alarm
persists.
If the ET alarm is not cleared, replace the servomotor.
For details, refer to "CHAPTER 11 ABSOLUTE POSITION SYSTEM."
The encoder inside the servomotor is overheated exceeding the
allowable temperature.
The absolute data of the encoder is lost.
dL1: Battery voltage drop, broken encoder cable
dL2: Multi-turn data fault in encoder
dL3: Detection at power-on after an ET alarm
EH
DL1
DL2
DL3
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