User's Manual

SECTION II INSTALLATION
SM 7063 07/97 2-6
2.5 BRIEF OPERATIONAL TEST OF THE CDU
Upon receipt of a new CDU, it is recommended that the unit be briefly tested as described in this section to
verify correct operation. This is performed in conjunction with a known operational End Unit.
2.5.1 CDU Power-Up Sequence
Upon CDU power-up, verify that the following display sequence is indicated on the CDU’s Front Panel:
The 32-Character LED Display (
Function Menu Display
) shows
“Self Test in progress”
accompanied by a beep tone. All other displays should be off.
The Brake Pressure Display shows three dashes
“- - -”
.
The 8-character LED Display (
ID Code Display
) shows the currently stored End Unit ID code (e.g.,
“ID=85323”
).
The
Function Menu Display
continues showing the following message sequence:
“Union Switch & Signal Inc.”
(by default) or a customer specified character string.
“Version: Revision X”
.
“Boot PROM Version: REV X”
.
“RAM test: passed”
.
“ROM test: passed”
.
“EEPROM test: passed”
.
“USC test: passed”
.
“Boot ROM test: passed”
.
“Self Test Complete: passed”
.
After completion of the above test sequence, the CDU reverts to its top (first ) function menu item
where the
Function Menu Display
shows (with the example ID code):
“ Change ID: 85323 “
with the first digit flashing, ready for input by the operator.
If a power-up diagnostic test fails, this will be indicated as such, and the power-up sequence will halt.
Note the specific test that has failed and contact US&S Customer Service at 1-800-652-7276 for
technical assistance or warranty repair instructions.