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MDS-D2/DH2 Series Instruction Manual
7.3 Troubleshooting
7.3.2 Troubleshooting for Each Alarm No.
Alarm No.
10
Insufficient voltage
Insufficient bus voltage was detected in main circuit.
Investigation details Investigation results Remedies SV SP
1 Check the timing when the alarm occurs.
The moment of READY ON Check the investigation item No. 2.
◯◯
During operation Increase the power supply capacity (KVA).
2
Did the external contactor turn ON at the READY
ON?
The external contactor did not turn ON. Check the investigation item No. 3.
◯◯
The external contactor turned ON,
but the alarm occurred immediately.
Check the investigation item No. 4.
3 Check the wiring of contactor excitation circuit.
The wiring is correct. Replace the contactor.
◯◯
The wiring is not correct. Rewire.
4
Check the input voltage of the drive unit by a tester.
(Voltage between L1 and L2, L2 and L3, L1 and L3)
The input voltage is normal. Replace the drive unit.
◯◯
The input voltage is abnormal.
The measured voltage fluctuates.
Increase the power supply capacity (KVA).
Replace the power supply.
Alarm No.
11
Axis selection error
The axis selection rotary switch is incorrectly set.
Investigation details Investigation results Remedies SV SP
1
Check the setting of the axis selection switch (rotary
switch) on the top of the unit.
The same axis No. is set for the L and M
axes.
Correctly set the axis No.
0 = No. 1 axis, 1 = No. 2 axis, ...
◯◯
The value is duplicated with other axis.
Correctly set the axis No.
0 = No. 1 axis, 1 = No. 2 axis, ...
The axis No. is correctly set. Replace the drive unit.
Alarm No.
12
Memory error 1
Hardware error (a CPU or an internal memory error was detected during the power ON self-check.
Investigation details Investigation results Remedies SV SP
1 Check the repeatability.
The error is always repeated. Replace the drive unit.
◯◯
The state returns to normal once, but occurs
sometimes thereafter.
Check the investigation item No. 2.
2
Check if there is any abnormality in the unit's
ambient environment.
(Ex. Ambient temperature, noise, grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
◯◯
Alarm No.
13
Software processing error 1
An error was detected in the software execution state.
Software processing has not finished within the specified time.
Investigation details Investigation results Remedies SV SP
1 Check the repeatability.
The error is always repeated. Replace the drive unit.
◯◯
The state returns to normal once, but occurs
sometimes thereafter.
Check the investigation item No. 2.
2
Check if there is any abnormality in the unit's
ambient environment.
(Ex. Ambient temperature, noise, grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
[1] Machine grounding check
◯◯
Alarm No.
14
Software processing error 2
The current processor is not operating correctly.
Investigation details Investigation results Remedies SV SP
1 Check the repeatability.
The error is always repeated. Replace the drive unit.
◯◯
The state returns to normal once, but occurs
sometimes thereafter.
Check the investigation item No. 2.
2
Check if there is any abnormality in the unit's
ambient environment.
(Ex. Ambient temperature, noise, grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
◯◯