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

APPENDIX
B–62764EN/01
G. ALARM LIST
901
11) Alarms Displayed on spindle Servo Unit
Alarm
No.
Meaning Description Remedy
“A”
display
Program ROM abnormality
(not installed)
Detects that control program is not started
(due to program ROM not installed, etc.)
Install normal program
ROM
AL–01 Motor
overheat
Detects motor speed exceeding specified speed
excessively.
Check load status.
Cool motor then reset
alarm.
AL–02 Excessive speed deviation Detects motor speed exceeding specified speed
excessively.
Check load status.
Reset alarm.
AL–03 DC link section fuse blown Detects that fuse F4 in DC link section is blown
(models 30S and 40S).
Check power transistors,
and so forth.
Replace fuse.
AL–04 Input fuse blown.
Input power open phase.
Detects blown fuse (F1 to F3), open phase or mo-
mentary failure of power (models 30S and 40S).
Replace fuse.
Check open phase and
power supply refenerative
circuit operation.
AL–05 Control power supply fuse
blown
Detects that control power supply fuse AF2 or AF3
is blown (models 30S and 40S).
Check for control power
supply short circuit .
Replace fuse.
AL–07 Excessive speed Detects that motor rotation has exceeded 115% of
its rated speed.
Reset alarm.
AL–08 High input voltage Detects that switch is flipped to 200 VAC when
input voltage is 230 VAC or higher (models 30S
and 40S).
Flip switch to 230 VAC.
AL–09 Excessive load on main cir-
cuit section
Detects abnormal temperature rise of power tran-
sistor radiator.
Cool radiator then reset
alarm.
AL–10 Low input voltage Detects drop in input power supply voltage. Remove cause, then reset
alarm.
AL–11 Overvoltage in DC link sec-
tion
Detects abnormally high direct current power sup-
ply voltage in power circuit section.
Remove cause, then reset
alarm.
AL–12 Overcurrent in DC link section Detects flow of abnormally large current in direct
current section of power cirtcuit
Remove cause, then reset
alarm.
AL–13 CPU internal data memory
abnormality
Detects abnormality in CPU internal data memory.
This check is made only when power is turned on.
Remove cause, then reset
alarm.
AL–15 Spindle switch/output switch
alarm
Detects incorrect switch sequence in spindle
switch/output switch operation.
Check sequence.
AL–16 RAM abnormality Detects abnormality in RAM for external data. This
check is made only when power is turned on.
Remove cause, then reset
alarm.
AL–18 Program ROM sum check er-
ror
Detects program ROM data error.This check is
made only when power is turned on.
Remove cause, then reset
alarm.
AL–19 Excessive U phase current
detection circuit offset
Detects excessive U phase current detection ciu-
cuit offset.
This check is made only when power is turned on.
Remove cause, then reset
alarm.
AL–20 Excessive V phase current
detection circuit offset
Detects excessive V phase current detection cir-
cuit offset.
This check is made only when power is turned on.
Remove cause, then reset
alarm.
AL–24 Serial transfer data error Detects serial transfer data error (such as NC pow-
er supply turned off, etc.)
Remove cause, then reset
alarm.
AL–25 Serial data transfer stopped Detects that serial data transfer has stopped. Remove cause, then reset
alarm.

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