Mitsubishi Electric MELSERVO MR-HP30KA Instruction Manual page 67

7. TROUBLESHOOTING
Indication
A.10 Undervoltage
A.12 Memory alarm 1 RAM, ROM memory
A.13 Clock alarm
A.15 Memory alarm 2 EEP-ROM fault
A.30 Regenerative
alarm
A.33 Over voltage
A.37 Parameter
alarm
A.45 Main circuit
device overheat
Downloaded from ManualsNet.com
Name Definition
Control power supply
voltage dropped to the
following voltage.
fault
Printed board fault
Permissible
regenerative power of
the built-in
regenerative brake
resistor or
regenerative brake
option is exceeded.
Converter bus voltage
exceeded to following
voltage.
MR-HP30KA: 400VDC
MR-HP55KA4: 800VDC
Parameter setting is
wrong.
Main circuit device
overheat
search engine
Cause
1. Power supply voltage is low.
2. Instantaneous control power failure
occurred for more than 100ms.
3. Power switched on within 5s after it
had switched off.
4. Shortage of power supply capacity
caused the power supply voltage to
drop at start, etc.
5. Faulty parts in the servo amplifier
Checking method
Alarm (A.10) occurs if power is
switched on after connectors
disconnected.
Failure of the part in the converter unit.
Checking method
Alarm (A.10, A.13, A.15) occurs
if power is switched on after
connectors disconnected.
1. Wrong setting of parameter No. 0
2. Regenerative brake option is not
connected.
3. High-duty operation or continuous
regenerative operation caused the
permissible regenerative power of
the regenerative brake option to be
exceeded.
Checking method
Call the status display and check
the regenerative load ratio.
4. Power supply voltage is abnormal.
MR-HP30KA: 260VAC or more
MR-HP55KA4: 520VAC or more
5. Regenerative transistor faulty.
Checking method
1) The regenerative brake option
has overheated abnormally.
2) The alarm occurs even after
removal of the built-in
regenerative brake resistor or
regenerative brake option.
6. Regenerative brake option faulty.
7. Unusual overheat due to cooling fan
stop
1. Regenerative brake option is not
used.
2. Though the regenerative brake
option is used, the parameter No. 0
setting is " 0 (not used)".
3. Lead of regenerative brake option is
open or disconnected.
4. Regenerative transistor faulty.
5. Wire breakage of regenerative
brake option
6. Capacity of regenerative brake
option is insufficient.
1. Servo amplifier fault caused the
parameter setting to be rewritten.
2. Parameter data improper-setting.
1. Converter unit faulty.
2. The power supply was turned on and
off continuously by overloaded status.
3. Air cooling fan of servo amplifier stops. The cooling method is reviewed.
7 - 2
Action
Review the power supply.
Change the Converter unit.
Change the Converter unit.
Set correctly.
Connect correctly.
1. Reduce the frequency of
positioning.
2. Use the regenerative brake
option of larger capacity.
3. Reduce the load.
Review power supply
Change the Converter unit.
Change Converter unit or
regenerative brake option.
1. Change the Converter unit or
cooling fan.
2. Reduce ambient temperature.
Use the regenerative brake
option.
Make correct setting.
1. Change lead.
2. Connect correctly.
1. For wire breakage of built-in
regenerative brake resistor,
change Converter unit.
2. For wire breakage of regenerative
brake option, change regenerative
brake option.
Add regenerative brake option or
increase capacity.
Change the Converter unit.
Set parameter correctly.
Change the Converter unit
The drive method is reviewed.