User's Manual

Alarms Testing

68P09255A69-3

Aug 2002

1X SC4812ET Lite BTS Optimization/ATP Software Release 2.16.1.x

PRELIMINARY

3-108

Battery Over Temperature Alarm (Optional)

CAUTION

Use special care to avoid damaging insulation on cables, or

damaging battery cases when using a heat gun.

Table 3-62 gives instructions on testing the battery over-temperature

alarm system.

Table 3-62: Battery Over-Temperature Alarm

Step Action

Use a low-powered heat gun to gently heat the battery over-temperature sensor (see location in

Figure 3-24).

! CAUTION

To avoid damaging the cable insulation, do not hold the hot air gun closer than three (3) inches from

the sensor.

NOTE

When the over-temperature alarm point is reached, an audible click will sound as DC PDA relay K1

contacts engage and relay K2 contacts disengage (make-before-break operation).

When the sensor is heated to approximately 51° C, a battery over-temperature alarm is generated with

the following indications.

- On the MAP, the CHARGE DISABLE LED (red) should light and the MAIN CONN. ENABLE

LED (green) should extinguish.

- The LMF should display an alarm condition as BTS Relay #22 contacts.

3 Switch the hot air gun to cool. Cool the sensor until the K1 and K2 contacts return to normal position

(K1 open and K2 closed). The following indications that alarms have cleared should occur:

- On the MAP, the CHARGE DISABLE LED (red) should extinguish and the MAIN CONN.

ENABLE (green) LED should light.

- The alarm reported on LMF will clear