Nidec Control Techniques Digitax-SF DA21223, Instruction Manual

Page: 345 / 386

16
8. Troubleshooting
Digitax SF
Instruction Man
ual
3. Alarms and Remedies
Alarm No.
25 Inverter 1
Symptom
and
Possible Cause
Anomaly in the control circuit has been detected.
Alarm No.
26 Inverter 2
Symptom
and
Possible Cause
Anomaly in the control circuit has been detected.
SERVO ON timed out.
Remedy
Check the motor power cable.
→ Grounding fault
→ Wiring mistake in motor power cable connections
If any of the above didn’t resolve the issue, please contact
the supplier of the drive
.
Reset Method
Alarm No.
27 Current sensor
Symptom
and
Possible Cause
The ambient temperature of the current sensor was high.
Anomaly of the current sensor has been detected.
Remedy
Check the installation method and environment.
If any of the above didn’t resolve the issue, please contact
t
he supplier of the drive
.
Reset Method
Alarm No.
28 Encoder (overheat)
Symptom
and
Possible Cause
The encoder
PCB
temperature has reached the upper limit.
Remedy
Check the installation method and environment of the motor.
Decrease the ambient temperature of the motor below the specification.
Reset Method
Alarm No.
29
Voltage drop (inside the
drive
)
Symptom
and
Possible Cause
The control power voltage (5 VDC) inside the
drive
has dropped.
Remedy
Verify that there is no short-circuit in encoder cable connections.
If the above didn’t resolve the issue, please contact
the supplier of the drive
.
Reset Method