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 m ode control switch is
in R (RUN) side. Normal operat ion is
performed when this switch is in R
(RUN) side.
Turn this switch to R (RUN) side.
Input LEDs Lit when the correspondi ng input is
ON. • Check that the input term inal
screw is not loose.
• Check that the input term inal
block is not loose.
• Check that the input v oltage is
within the specified range.
Output LEDs Lit when the output is ON and the
corresponding load should operate. • Check t hat the output terminal
screw is not loose.
• Check that the output te rminal
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.