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GSM-204-523
General maintenance procedures
31st Oct 01
Maint. 2–10
Maintenance Information: Horizon
macro
outdoor
CONTROLLED INTRODUCTION
68P02902W04-A
Battery backup
test procedures
The test procedure carried out will depend on battery backup configuration.
NOTE
If the BTS cabinet is operational or otherwise visible to the
OMC-R, alarms will be generated. Notify the OMC-R
before carrying out these test procedures.
The internal or external batteries must be fully charged
before carrying out these test procedures.
The battery capacity test discharges the internal batteries
to –44 V dc. If an external power supply failure occurs
immediately after the test, the battery back up duration is
reduced to approximately 3 minutes. The internal batteries
recharge to approximately 80% capacity in less than one
hour.
Internal battery backup
To test operation of internal battery backup:
1. Operate the CAB front panel BATTERY TEST button to initiate internal
battery capacity test.
2. Check that the BATTERY CAPACITY LEDs flash during the test.
3. Check the 15 mins battery capacity LED is illuminated at the end of the
test.
The test of internal battery backup operation is now complete.
External battery backup (AEH)
To test operation of external battery backup:
1. Switch the main 32 A circuit breaker to off to disconnect the external ac
supply.
2. Check that the yellow I/P HEALTHY and green O/P HEALTHY LEDs on
the three TOPSMs are extinguished.
3. Check that the green RADIO LED on the CAB remains illuminated.
4. Check that the RADIO STATUS LED for each CTU continues to flash
green.
5. Verify (by listening) that the TMS recirculation fans are operating.
NOTE
In step 5 ambient air fans may also run, depending on site
conditions.
6. Switch the main 32 A circuit breaker to on to reconnect the external ac
supply.
7. Check that the yellow I/P HEALTHY and green O/P HEALTHY LEDs on
the three TOPSMs illuminate, and that the indications checked in steps 3
to 5 remain unchanged.
The test of external battery backup operation is now complete.