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6F3B0253
Basic Hardware and Function 277
9. Maintenance and Checks
9.2 Daily checks
To maintain the system and to prevent troubles, check the following items on daily
basis.
Item Check Corrective measures
PWR
(power)
Lit when internal 5V is
normal.
RUN Lit when operating
normally.
Status LEDs
FLT (fault) Not lit when operating
normally.
If the LEDs are not normal, see
10. Troubleshooting.
Mode control
switch
Check that the mode control switch is
in R (RUN) side. Normal operation is
performed when this switch is in R
(RUN) side.
Turn this switch to R (RUN) side.
Input LEDs Lit when the corresponding input is
ON.
• Check that the input terminal
screw is not loose.
• Check that the input terminal
block is not loose.
• Check that the input voltage is
within the specified range.
Output LEDs Lit when the output is ON and the
corresponding load should operate.
• Check that the output terminal
screw is not loose.
• Check that the output terminal
block is not loose.
• Check that the output voltage
is within the specified range.
!
CAUTION
1. Pay special attention during the maintenance work to minimize the risk
of electrical shock.
2. Turn off power immediately if the T1-16S or related equipment is
emitting smoke or odor. Operation under such situation can cause fire
or electrical shock.