MDS-E/EH Series Instruction Manual
9 Power Backup System
462
IB-1501229-F
9.4.6 Trouble Shooting at Power ON
If the drive unit does not start up correctly and a system error occurs when the drive unit power is turned ON, the power
backup unit may not have been started up properly. Check the LED display on the power backup unit, and take
measures according to this list.
LED
display
Symptom
Cause of occurrence
Investigation method
Remedy
None
PFU unit fails to start.
PFU's internal fuse is
open.
Check whether the power voltage is
properly input to L1, L2 and L3.
If voltage is properly input, replace
the power backup unit.
b
Unable to cancel emergency stop.
External emergency stop is occurring
on the power supply unit. (The LED on
power supply unit shows "q".
)
Disconnection of the DO3
signal of CN43.
Check if the DO3 signal of CN43 is
correctly connected to CN23A of the
power supply unit.
Connect correctly.
Check if the 24V power supply of
DO3 signal is correctly connected to
DO_COM terminal.
Connect correctly.
1A
Unable to cancel emergency stop.
External emergency stop is occurring
on the power supply unit. (The LED on
power supply unit shows "q".
)
Disconnection of the
resistor unit or an illegal
resistance value.
Check the investigation items of the alarm No. 1A.
PFU's internal resistor
regeneration transistor is
broken.
Unplug L+/L-, C+/C- and R1/R2
from the PFU unit, and measure the
resistance between L+/L- terminals.
If short-circuited, replace the power
backup unit.
51
Unable to cancel emergency stop. The
alarm 6C (Power supply: Main circuit
error) is occurring.
PFU's internal resistor
regeneration transistor is
broken.
Unplug L+/L-, C+/C- and R1/R2
from the PFU unit, and measure the
resistance between L+/L- terminals.
If short-circuited, replace the power
backup unit.
52
Power supply or drive unit fails to start.
An error in the control
power output circuit.
Check the investigation items of the alarm No. 52.
d1
Unable to cancel emergency stop.
External emergency stop is occurring
on the power supply unit. (The LED on
power supply unit shows "q".
)
Over-regeneration
protection is working.
Check the investigation items of the warning No. D1.
d5
Unable to cancel emergency stop.
External emergency stop is occurring
on the power supply unit. (The LED on
power supply unit shows "q".
)
An overheat was detected
by the thermal sensor of
the resistor unit.
Check the investigation items of the warning No. D5.
Summary of Contents for MDS-E
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Page 32: ...1 IB 1501229 F 1 Installation ...
Page 76: ...45 IB 1501229 F 2 Wiring and Connection ...
Page 132: ...101 IB 1501229 F 3 Safety Function ...
Page 142: ...111 IB 1501229 F 4 Setup ...
Page 277: ...MDS E EH Series Instruction Manual 4 Setup 246 IB 1501229 F ...
Page 278: ...247 IB 1501229 F 5 Servo Adjustment ...
Page 351: ...MDS E EH Series Instruction Manual 5 Servo Adjustment 320 IB 1501229 F ...
Page 352: ...321 IB 1501229 F 6 Spindle Adjustment ...
Page 404: ...373 IB 1501229 F 7 Troubleshooting ...
Page 455: ...MDS E EH Series Instruction Manual 7 Troubleshooting 424 IB 1501229 F ...
Page 456: ...425 IB 1501229 F 8 Maintenance ...
Page 475: ...MDS E EH Series Instruction Manual 8 Maintenance 444 IB 1501229 F ...
Page 476: ...445 IB 1501229 F 9 Power Backup System ...
Page 494: ...463 IB 1501229 F 10 Appx 1 Cable and Connector Assembly ...
Page 504: ...473 IB 1501229 F 11 Appx 2 D A Output Specifications for Drive Unit ...
Page 514: ...483 IB 1501229 F 12 Appx 3 Protection Function ...
Page 523: ...MDS E EH Series Instruction Manual 12 Appx 3 Protection Function 492 IB 1501229 F ...
Page 524: ...493 IB 1501229 F 13 Appx 4 Compliance to EC Directives ...
Page 528: ...497 IB 1501229 F 14 Appx 5 EMC Installation Guidelines ...
Page 540: ...509 IB 1501229 F 15 Appx 6 Higher Harmonic Suppression Measure Guidelines ...
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