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Descri
tion
Design.
DateEd
01.03.23
SHEET
DRAW. No.
CUST.
TITLE
okota
okota
Newly designed
i series Spindle
Start-up Procedure
-53866E-387/02
FANUC LTD
1
7.8 Alarms Table
CNC monitor display
0 15 15i 16i/16
SPM
Display
(alarm
code)
Alarm Description
Troubleshooting
(Described parameter is No.16i/16’)
409 OT301 SP0001 7n01 01 Motor overheat 1. Reconsider circumstances
temperature and load condition
(cutting condition and acceleration/
deceleration frequency).
2. If the cooling fan of the spindle
motor is stopped, replace it with a
new one.
3. Check and correct parameters.
4. Change feedback cables.
409 OT302 SP0002 7n02 02 Excessive velocity error 1. Reduce load by reconsidering
cutting condition.
2. Correct the parameter (No.4082).
409 OT399 SP0003 7n03 03 DC link fuse blown 1. Change SPM.
2. Confirm insulation condition of
motor.
409 OT399 SP0004 7n04 04 Confirm the input power supply into
PSM.
409 OT399 SP0006 7n06 06 Thermal sensor
disconnected.
1. Check and correct the parameter.
2. Change feedback cables.
409 OT307 SP0007 7n07 07 Overspeed 1. Change feedback cables.
2. Check the sequence (When a
spindle motor cannot rotate, spindle
synchronization is specified etc).
409 OT309 SP0009 7n09 09 Main circuit overload/IPM
overheat
1. Improve the cooling condition of
heatsink
2. Reconsider load condition.
409 OT311 SP0011 7n11 11 DC link overvoltage 1. Confirm PSM selection.
2. Change PSM.
409 OT312 SP0012 7n12 12 DC link overcurrent/
IPM alarm
1. Confirm insulation condition of
motor.
2. Check parameters for each motor.
3. Change SPM.
409 OT399 SP0015 7n15 15 Speed range switching/
spindle switching alarm
1. Check the ladder sequence.
2. Change the magnetic contactor for
power line switching.
408 OT300 SP098x 750 18 Program sum check
abnormal
Change SPM control printed circuit
board.