User Manual

165
MN024-08
Removing a TMP module
Switch off the Master Unit power supply and remove RF jumpers. Then
• unscrew the 4 screws and slowly remove the card.
• put the removed TMP card in its safety box.
• switch on again the Master Unit power supply and refer to TFLN Start-up
section.
TMP troubleshooting
In case a TMP power limiter has any problem, this will be easily revealed
through LEDs on its front panel otherwise troubleshooting can be carried out
through LMT or supervision system.
The previous table reports a brief description of the TMP alarm, together with
a reference to the corresponding alerted LEDs.
Understanding why one LED is on can be done following the troubleshooting
procedure reported hereinafter.
Quick troubleshooting procedure
(The following procedure is summarized by the flow-chart in fig. 22)
1. In case the TMP red led is on and the green led is off there is a problem
on the power supply.
a. Check the TPRN sub-rack and if it is switched off, switch it on.
b. If the sub-rack is switched on, check the backplane power supply
connector to verify if the +12Vdc is provided to the TMP module.
If not there is a fault on the TPRN backplane and you need to
return the sub-rack.
c. Otherwise the TMP power supply section is faulty. Return the
unit.
2. In case the TPM red and green leds are on, the RF level at the input port
has exceeded the specified threshold. Decrease the RF signal or change
the threshold.
3. In case the yellow led is on, check the RF input level
TMPX
ALARM CODE
(TSUN
description)
ALARM
DESCRIPTION
ACTIV
E LED
SUPERVISION
PRIORITY
LEVEL
ACTION
RECOMMENDED
RELÉ
PRIORITY
LEVEL
(subrack)
Power supply alarm
UPS HW failure or
malfunction.
RF is turned OFF
RED MAJOR Return the unit MAJOR
Temperature alarm Over-temperature alarm
YELLO
W
MINOR
Check ventilation
and environment
MINOR
RF Input overdrive
The input signal has
exceeded the threshold
RED WARNING
Check the RF input
signal
MAJOR
RF Input No signal
No RF signal at the input
port
YELLO
W
MINOR
Check the RF input
signal
MINOR
Tab. 5.12:Description of the TMP alarms