Mitsubishi Electric MELSEC-KOJIU Instruction Manual page 122

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10. MAINTENANCE AND INSPECTION
Check if required voltage is
applied across line voltage
terminals of basic unit.
[AC 115V
f
15%1
Check external wiring and
turn on the external power
4
again.
NO
Check if p o w - - Y E S
within basic unit is blown.
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Change power supply fuse.
GGC3 (3A)
Fuse encased in glass tube
10.2 Checking Procedure during Abnormal Condition
10.2.1 In case POWER indicator of basic unit is off
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1
rc
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Ceck if DC 24
V cable for
exterior is short-circuited or
wrongly wired.
1
NO
10.2.2
In case input signal fails to turn on while input device has turned on
c
-
Check if input unit operation ,YES
indicator i s on.
Make sure that input
signal
is
.off in MONITOR mode of
programmer.
NO
(In the case of (in the case of
ext. unit)
Check DC voltage across unit
input terminal
(+)
and COM
-
terminal
(4.
setting
Set
switch
DCOV
cable properly.
OK
v v
Rive.
hange I/O unit.
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