FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

APPENDIX
G. ALARM LIST
B–62764EN/01
898
7) Overheat alarms
Number Message Contents
700 OVERHEAT: CONTROL UNIT Control unit overheat
Check that the fan motor operates normally, and clean the air filter.
701 OVERHEAT: FAN MOTOR The fan motor on the top of the cabinet for the contorl unit is overheated.
Check the operation of the fan motor and replace the motor if necessary.
704 OVERHEAT: SPINDLE Spindle overheat in the spindle fluctuation detection
1) If the cutting load is heavy, relieve the cutting condition.
2) Check whether the cutting tool is share.
3) Another posible cause is a faulty spindle amp.
8) Rigid tapping alarm
Number Message Contents
740 RIGID TAP ALARM : EXCESS
ERROR
During rigid tapping, the position deviation of the spindle in the stop
state exceeded the setting.
741 RIGID TAP ALARM : EXCESS
ERROR
During rigid tapping, the position deviation of the spindle in the stop
state exceeded the setting.
742 RIGID TAP ALARM : LSI OVER
FLOW
During rigid tapping, an LSI overflow occurred on the spindle side.
9) Spindle alarms
Number Message Contents
749 S–SPINDLE LSI ERROR A communication error occurred for the serial spindle. The cause may
be the disconnection of an cable or the interruption of the power to the
spindle amplifier.
(Note) Unlike spindle alarm No. 750, this alarm occurs when a serial
communication alarm is detected after the spindle amplifier is
normally activated.
750 SPINDLE SERIAL LINK START
FAULT
This alarm is generated when the spindle control unit is not ready for
starting correctly when the power is turned on in the system with the
serial spindle.
The four reasons can be considered as follows:
1) An improperly connected cable, or the spindle control unit’s power
is OFF.
2) When the NC power was turned on under alarm conditions other
than SU–01 or AL–24 which are shown on the LED display of the
spindle control unit.
In this case, turn the spindle amplifier power off once and perform
startup again.
3) Other reasons (improper combination of hardware)
This alarm does not occur after the system including the spindle con-
trol unit is activated.
4) The second spindle (when SP2, bit 4 of parameter No. 3701, is 1)
is in one of the above conditions 1) to 3).
See diagnostic display No. 409 for details.
751 FIRST SPINDLE ALARM DETEC-
TION (AL–XX)
This alarm indicates in the NC that an alarm is generated in the spindle
unit of the system with the serial spindle. The alarm is displayed in form
AL–XX (XX is a number). Refer to (11) Alarms displayed on spindle
servo unit .The alarm number XX is the number indicated on the
spindle amplifier. The CNC holds this number and displays on the
screen.

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