4.4 MAINTENANCEOF ACGC
4.4,1 ACGCTROUBLESHOOTING
ACGCfailure may be caused
lowing conditions:
(1) Hardware failure
by any one of fol-
(2) System software failure
(3) Application program failure
For (1) or (2) above, contact your YASKAWAre-
presentative.
If the cause appears to be application program
failure, contact the service agent of the
machine tool manufacturer.
4.4.2 ACGCALARMINIIICATION
(1) A YASNACsystem equipped with ACGCmay in-
dicate what appears to be a machine-triggered
alarm. Refer to the Instruction Manual of the
machine manufacturer for details of such alarm.
(2) If such machine- triggered alarm does not
appear, the screen displays an alarm code with
the same meaning as that for the 9“ CRTNCOp-
erator’s Panel.
Refer to Par. 4.2 TROUBLE-
SHOOTINGBYALARMCODEfor further details.
(3) ACGCperforms self-diagnosis and data
check, and any trouble in ACGCis indicated
by
an alarm. Table 4.7 describes alarm displays
and their meanings.
Table 4.7 ACGCAlarms
Alarm Display/lleaning Solution
I
SYSTEMPROMTOTALERROR:
The PROMcontaining the sys-
tem software is faulty. The
faulty PROMNo. appears on.
-t12 V/12 V POWERDOWN
The power supply for RS232C
interface is faulty.
Contact YASREP.
4.4.3 FAULTSNOTDISPLAYEDBYACGCALARM
INDICATION
(1) CRTscreen remains blank:
If nothing appears on the CRTscreen after
power is turned on,
@ ACpower SUPPI.Y,
@ CRTfuse blown.
check the following:
e.g. one phase is open.
@ SUPPIY voltage at the ACGCrear panel termi-
nal is 230 VACk15%.
@ DCsuPPly in ACGCis normal. (Voltages are
+5V, +12V, and –12 V.)
@ Wiring between the PCBand CRT is correct.
After checking these items, turn on power
again.
If the normal operation cannot be
achieved, contact YASREP.
(2) No keyboard operation is accepted (hang UP)
(a) A1though message may appear on the CRT
screen after power is turned on, no keyboard
operation is accepted:
@ Check keyboard wiring for loose or open
connections.
@ Check the terminals of the DCsupply unit
for +5 V, +12 V, and –12 V.
–45–
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