
B–62835EN/01
9. TROUBLESHOOTING (SERIAL INTERFACE SPINDLE)
335
For troubleshooting the listed alarms, refer to 9.2 “TROUBLE
SHOOTING FOR EACH ALARM”.
Alarm No. Meanings Description Remedy
AL–01
Motor overheat Detects internal motor temperature :
exceeding specified temperature.
Check load status.
Cool motor, then reset alarm.
AL–02
Excessive speed devi-
ation
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
momentary failure of power (models 30S and
40S).
Replace fuse. Check open phase and power
supply regenerative 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 set to 200 VAC when
input voltage is 230 VAC or higher (models
30S and 40S).
Set switch to 230 VAC.
AL–09
Excessive load on main
circuit section
Detects abnormal temperature rise of power
transistor radiator.
Cool radiator, then reset alarm.
AL–10 Low input voltage Detects drop in input power supply voltage. Correct cause, then reset alarm.
AL–11
Overvoltage in DC link
section
Detects abnormally high direct current
power supply voltage in power circuit section.
Correct cause, then reset alarm.
AL–12
Overcurrent in DC link
section
Detects flow of abnormally large current in di-
rect current section of power circuit.
Correct cause, then reset alarm.
AL–13
CPU internal data
memory abnormality
Detects abnormality in CPU internal data
memory. This check is made only when pow-
er is turned on.
Correct 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.
Correct cause, then reset alarm.
AL–18
Program ROM sum
check error
Detects program ROM data error. This check
is made only when power is turned on.
Correct cause, then reset alarm.
AL–19
Excessive U phase
current detection circuit
offset
Detects excessive U phase current detection
circuit offset. This check is made only when
power is turned on.
Correct cause, then reset alarm.
AL–20
Excessive V phase
current detection circuit
offset
Detects excessive V phase current detection
circuit offset. This check is made only when
power is turned on.
Correct cause, then reset alarm.
AL–24
Serial transfer data
error
Detects serial transfer data error (such as NC
power supply turned off, etc.)
Correct cause, then reset alarm.
AL–25
Serial data transfer
stopped
Detects that serial data transfer has stopped. Correct cause, then reset alarm.
AL–27
Position coder signal
disconnection
Detects abnormality in position coder signal
(such as unconnected cable and parameter
setting error).
Correct cause, then reset alarm.
AL–29
Short-time overload Detects that overload has been continuously
applied for some period of time (such as re-
straining motor shaft in positioning).
Correct cause, then reset alarm.
AL–30 Input circuit overcurrent Detects overcurrent flowing in input circuit. Correct cause, then reset alarm.
9.1
LIST OF SERIAL
INTERFACE SPINDLE
AMPLIFIER ALARMS