
B–62835EN/01
8.TROUBLESHOOTING
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3 What failure occurred ?
D Which alarm was displayed on the alarm display screen on the
CRT?
(Check the axis along which an alarm has occurred for alarms 300
to 599.)
D For alarm 350: Examine diagnostic 202
For alarm 351: Examine diagnostic 203
For alarm 414: What does diagnostic display 200,201,204
indicate ?
D For alarm 751 or 761 : Which spindle alarm is indicated ?
(indicated by AL–XX (XX is a number))
D Is the CRT screen correct ?
D If machining dimensions are incorrect
1) How large is the error ?
2) Is the position display on the CRT correct ?
3) Are the offsets correct ?
4 Other information
D Is there noise origin around machine?
If the failure has not occurred frequently, the cause may be external
noise to the power supply or inductive noise on machinery cables.
Operate other machines connected to the same power line and see
if noise come from the relays or compressors.
D Is it taken any countermeasure for noise in machine side?
D Check the following for the input power supply voltage :
1) Is there variation in the voltage ?
2) Are the voltages different depending on the phase ?
3) Is the standard voltage supplied ?
D How high is the ambient temperature of the control unit?
(0_C to 55_C during operation)
Refer to manual about noise.
D Has excessive vibration been applied to the control unit?
(0.5 G or less during operation)
5 When you contact our service center, specify the following items :
1) Name of the unit
2) Name of the machine tool builder and type of machine
3) Software series/version of the Power Mate
4) Specifications of the servo amplifier and motor
(for a failure related to the servo)
5) Specifications of the spindle amplifier and spindle motor
(for a failure related to a spindle)
6) Name and contact of the person who is most familiar with the
failure conditions
(for a failure related to the servo)
D See the drawing issued by the machine tool builder for the
locations of the Power Mate and servo/spindle amplifiers.
D We use the following specification codes :
Servo/Spindle amplifier : A06B–VVVV–HVVV
Servo/Spindle motor : A06B–VVVV–BVVV
(V represents a number)
The above information is required by FANUC to determine
the cause of the failure. The information is used to
attempt to reproduce the failure at the service center.