Fault Finding; Led Indications; Figure 5.1 - Led Indicators - Siemens UTMC OTU Handbook

The unit is a modular design, which simplifies fault finding to a card or assembly level.
Section 6, which starts on page 38, provides guidelines to fault finding and repair to
modular level. The status LED indicators on the Processor card provide a visual
identification of the fault condition existing on the unit.
The software has a diagnostic routine which, when accessed by the handset, can
identify many other types of fault conditions.

5.3.1 LED Indications

The three LED indicators on the Processor card give the following status or fault
indication:
667/HB/31601/000

5.3 FAULT FINDING

RE
GREEN
GREEN

Figure 5.1 - LED Indicators

Page 35
UTMC OTU/MOVA Handbook
LP3
Watchdog LED
Communications
LED
System LED
LP1
Issue 5