Mitsubishi Electric MDS-E Series Instruction Manual page 491

MDS-E/EH Series Instruction Manual
9 Power Backup System
Alarm No.
Resistor unit circuit error :
53
An error was detected in the resistor regeneration transistor or regeneration output.
Investigation details
1 Check the reproducibility.
Check if there is any abnormality in the unit's
2 ambient environment. (Ex. Ambient temperature,
noise, grounding)
Alarm No.
Inrush circuit error :
54
An error was detected in the rush circuit relay or rush resistor of the control power supply.
Investigation details
1 Check the reproducibility.
Check if there is any abnormality in the unit's
2 ambient environment. (Ex. Ambient temperature,
noise, grounding)
Alarm No.
Over-current in control power output circuit :
55
An excessive current was detected in the control power supply backup output circuit.
Investigation details
Check whether the control power OUT-L11/OUT-
1
L21 are correctly connected.
2 Check the reproducibility.
Check if there is any abnormality in the unit's
3 ambient environment. (Ex. Ambient temperature,
noise, grounding)
Alarm No.
Overheat in control power output circuit :
56
An overheat was detected in the control power supply backup output circuit.
Investigation details
1 Check the investigation items of the alarm No. 55.
Alarm No.
Resistor unit error :
58
An abnormal resistor unit value was detected during the power ON self-check.
Investigation details
1 Check the investigation items of the alarm No. 1A.
Overvoltage :
Alarm No.
The voltage between L+/L- of the main circuit has exceeded the tolerance. The voltage between L+/L- is relatively high
90
immediately after the occurrence of this alarm. Therefore, wait for 5 minutes or longer until the voltage drops, and then cancel this
alarm by reset.
Investigation details
1 Check the reproducibility.
Check the machine's load inertia and the maximum
2
motor rotation speed.
3 Check the power supply voltage.
4 Check the capacity of the resistor unit.
Check if there is any abnormality in the unit's
5 ambient environment. (Ex. Ambient temperature,
noise, grounding)
IB-1501229-F
Investigation results
Always reproduced.
The state returns to normal once, but the error
occurs sometimes thereafter.
Take remedies according to the causes of the abnormality in the ambient environment.
Investigation results
The error is always repeated.
The state returns to normal once, but the error
occurs sometimes thereafter.
Take remedies according to the causes of the abnormality in the ambient environment.
Investigation results
There is connection failure.
There is no connection failure.
The state returns to normal once, but the error
occurs sometimes thereafter.
Take remedies according to the causes of the abnormality in the ambient environment.
Investigation results
Investigation results
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.
Voltage is exceeding the specified maximum
value.
Voltage is below the specified limit.
Capacity is not sufficient.
Capacity is sufficient.
Take remedies according to the causes of the abnormality in the ambient environment.
460
Remedies
Replace the power backup unit.
Check the investigation item No. 2.
Remedies
Replace the power backup unit.
Check the investigation item No. 2.
Remedies
Connect correctly.
Check the investigation item No. 2.
Check the investigation item No. 3.
Remedies
Remedies
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.
Change the power supply voltage to be within the
specified range.
Check the investigation item No. 4.
Use a resistor unit with a greater capacity.
Check the investigation item No. 5.