Routine Maintenance; Annual Maintenance - Siemens UTMC OTU Handbook

LED Name
System LED
(GREEN)
Communications
LED (GREEN)
Watchdog LED
(RED)
Units only require annual maintenance, which can be performed at the same time as
the inspection of other equipment. On these visits, trained personnel must switch off the
mains power to the controller and the unit.

5.4.1 Annual Maintenance

The following battery capacity test is only required if the outstation is powering the
modem directly. The battery capacity test is not required when the modem is mains
powered.
Switch the mains power off and check the outstation and modem is supported by the
battery for a minimum of 5 minutes. Do this by checking that the System LED continues
to flash and that the modem power LED remains illuminated. This tests the condition of
the Unit Support battery, and if the unit loses support within 5 minutes, the battery must
be replaced.
667/HB/31601/000
State
OFF
Slow Flash (on
for 1 sec, off for
2 sec)
Fast Flash (on
for 1/4 sec, off
for 1/2 sec)
Heart Beat (two
flashes in 1
second, then off
for 1 second)
Fading up and
down in
brightness
ON Steady
OFF
Brief flashes
ON with brief
flashes OFF
OFF
ON

5.4 ROUTINE MAINTENANCE

Indication
No power or Processor error
Normal operation
A fault has been detected – check the Fault
Table screen on the web interface.
Main software not executing. Running
bootloader and waiting local software update.
Main software not executing. Running 'launcher'
program and waiting local software update.
Processor error
No data being received from the network
Communications traffic
Communication established and under control of
the instation
The Processor is running and keeping the
watchdog triggered.
The hardware watchdog has timed out
sometime in the past.
When illuminated, this does not mean that the
unit is currently in a watchdog state.
To clear: Hold down the Processor card Reset
button for 2 seconds.
Page 36
UTMC OTU/MOVA Handbook
Issue 5