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Installation Guide
T942C- and T942C/2 Central Unit
2003-01-08 / Rev.C
1 Check that sections 2, 3 and 5-8 on switch SW02 are set to OFF. If reset of the non-
volatile memory is desired when restarting the Central Unit, SW02 section 4 must
be set to ON, otherwise it is set to OFF.
Check that jumper S03 is jumpered, and jumpers S17A and S17B are set as follows:
OSP, System 5000
PSS
CTS 900
Check if jumper S10A is to be jumpered or not.
2 Check that SW01 is set to the correct address and SW02 is set for desired
parameters, and that module key IC08 is installed.
Units with S942C Software
3 Energize all the units in the system. Function indicator LED01 on T942C should light
red for about 1 second and then change to a flashing orange.
Function indicator
Figure 25. Function Indicator.
At start-up the Central Unit begins with a short self-test for a few seconds. The
function indicator indicates this by short blinks at one second intervals. The
parameter list in the FLASH PROM is copied to the non-volatile memory.
If no faults are detected, the Central Unit then makes a survey of the modules
connected to the data buses. The function indicator blinks rapidly (orange - 5 times/
second) until all data buses are surveyed. After this the function indicator lights
steadily.
If it continues to indicate with a steady red, check that supply voltage is
12.5 V DC ± 10%.
Flashing indicates a fault as follows:
Colour ON
red 100 ms
green 800 ms
red 1 s
S17A
position 2-3
position 2-3
position 1-2
OFF Fault
800 ms Incorrect software licence
100 ms Parameter fault
1 s Watchdog reset
TD 91684GB
S17B
position 1-2
position 1-2
position 2-3
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