Troubleshooting For Each Warning No - Mitsubishi Electric MDS-E Series Instruction Manual

MDS-E/EH Series Instruction Manual
9 Power Backup System

9.4.5 Troubleshooting for Each Warning No.

Instantaneous power interruption :
Warning No.
Instantaneous power interruption of the input power supply or voltage drop between L+ and L- was detected. This warning also
D0
occurs at normal power OFF.
Investigation details
Check whether the power voltage is properly input
1
to L1, L2 and L3.
2 Check the power supply voltage.
3 Check the reproducibility.
Check if there is any abnormality in the unit's
4 ambient environment. (Ex. Ambient temperature,
noise, grounding)
Over regeneration :
Warning No.
Over-regeneration detection level became over 100%.The regenerative resistor is overloaded.The warning is not released even
D1
if the power turns ON again.
The warning is released if over-regeneration level drops to less than 80% in power ON state (usually takes 20 minutes).
Investigation details
1 Check the reproducibility.
Check the machine's load inertia and the maximum
2
motor rotation speed.
Check the frequency at which power failure or
3
power supply alarm occurs.
4 Check the capacity of the resistor unit.
Warning No.
Resister unit overheat :
D5
An overheat was detected by the thermal sensor of the resistor unit.
Investigation details
Check if the regenerative resistor reaches high
1
temperatures.
Check whether the THM1/THM2 terminals of CN43
2
are correctly connected.
Check for a disconnection between AL1/AL2
3
terminals of the regenerative resistor.
Investigation results
The voltage is not input properly.
The voltage is input properly
The voltage drops under the lower limit value.
The voltage frequently drops under the lower limit
value.
Voltage is below the specified limit.
Always reproduced.
This error occurs occasionally.
Take remedies according to the causes of the abnormality in the ambient environment.
Investigation results
This error occurs every time the motor decelerates
at power failure or at power supply alarm.
This error occurs occasionally.
Increased than before.
No change.
Occurs more than once per hour.
The frequency is low.
Capacity is not sufficient.
Capacity is sufficient.
Investigation results
The regenerative resistor reaches high
temperatures.
The regenerative resistor does not reach high
temperatures.
There is connection failure.
There is no connection failure.
There is disconnection.
There is no disconnection.
461
Remedies
Inputt properly.
Check the investigation item No. 2.
Change the power supply voltage to be within the
specified range.
Use a power supply voltage with a greater
capacity.
Check the investigation item No. 3.
Replace the power backup unit.
Check the investigation item No. 4.
Remedies
Check the investigation item No. 2.
Check the investigation item No. 3.
Decrease the machine's load inertia and the
maximum motor rotation speed.
Check the investigation item No. 4.
Reduce the frequency at which power failure or
power supply alarm occurs.
Check the investigation item No. 4.
Use a resistor unit with a greater capacity.
Replace the power backup unit.
Remedies
Wait for cooling of the regenerative resistor and
wait for the overheat of the thermal to be released.
Check the investigation item No. 2.
Connect correctly.
Check the investigation item No. 3.
Replace the regenerative resistor.
Replace the power backup unit.
IB-1501229-F