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4.3 TROUBLESHOOTING WITHOUT ALARM CODES
The following examples are instructions for locating and
correcting the troubles not indicated by alarm codes.
For further details of signal meanings expressed by the
address -I , refer to Section I! Details of Signals!! in
Connecting Manual. (TOE–c843-11. 5 )
4.3.1 POWER CANNOT BE SUPPLIED
Cause of Trouble
No power supplied to
NC unit.
Alarm LED of CPS-12N
Power ON/OFF Switch
is
not set
properly.
1 2 3
(invalid/valid
(Set at
factory
prior to
s h i p m e n t )
Table 4,31
Check Method
insure that SOURCE LED (green) of DC power
ights.
Signal
Display
' E D
Color
Nor-
m al
POWER Green
ON
status
+5 v
Trouble
+5 v,
Trouble k 12 v
'
-12 v
Trou
Trouble
ble
1
Dis-
Trouble +24 V
Red
play
CN05 connector between 4 and 7 short-circuits.
SW1 and SW2 Settina
Use external
Use panel
device (E OF)
(POF ) only
SW5
Swl
SW2
Function &
Cause
Lights when AC
power is on, out
when power is off.
Lights when
SOURCE invut
above
170
at NCMX ON,
Lights at +5 V
overvoltage or
Lights at +12 V
e
d
overvoltage or
12 V undervoltage.
Lights at +24 V
overvoltage
or overcurrent.
Lights with
external EXALNI
signal, and
overheat.
Use both
only
1 2 3
Solution
Check molded-case
circuit breaker or NC
panel and also
connector CN05 of
When trouble in Table
on the left is displayed
by LED, correct the
trouble, then, turn ON
power again. If the
trouble is not corrected
by this procedure,
trouble may be in the
power unit. Contact
your YASKAWA
representative
If overcurrent causes
the trouble and the
cause is removed, the
power supply can be
turned on again after
it ia turned off.
Unless the main circuit
breaker is turned off
and then on, the power
supply cannot be
turned on again even
if the cause has been
removed since the
alarm circuit in the
CPS cannot be reset.
Set
correctly shorting
plug SW1 and SW2 at
left corner on JANCD-
FC230B or FC260
A
a
103
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Table of Contents
Troubleshooting
