Ericsson Radio Systems AB PKRC1311004-1 Manual De Usuario

Operation and Maintenance Support

•

At a Max Cooling state change.

•

After an EDMRU (ECU) reset.

The Max Cooling state will not be updated more frequently than every
30th second.

If Max Cooling fails the fault is logged but no further action taken
within the scope of this function.

38.13

Fault Indicator

Purpose

To indicate if there are any faults in the RU the indicator is located on.

Preconditions and Initiation

Applicable for any operational condition. The function is initiated when
the SW is started.

Description

The Fault Indicator is controlled from the Diagnostics and Fault
Handling Functionality and from the Restart and Recovery
Functionality. When the RU is reset in any way the handling of the
indicator is terminated.

Limitations:

When the CU of a CDU-D has detected lost communication to both its
superior RUs, the CU restarts according to the Restart and Recovery
functionality. Flashing of the fault indicator is then not used for the CU.

Colour:

Red

Position:

Main RUs (DXU, TRU, ECU) and sub
RUs (CDU, PSU, BFU).

ON:

One or more faults are detected in the RU.

FLASHING (0.5 Hz):

- Running on Base Application OR

- For DMRUs and Sub RUs (TRU, ECU,
CDU, BFU, PSU); The RU has detected
lost communication to superior RU.

Note:

The flashing state may not be used for Sub RUs without a
processor.

OFF:

No fault is located to the RU.

Priority

ON has a higher priority than
FLASHING. If the conditions for two
states are fulfilled, the one with the
highest priority will control the indicator.

EN/LZT 720 0008

R1A

2001-06-26

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