Nautel NV30LT-N Operation & Maintenance Manual

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Nautel NV30LT-N Operation & Maintenance Manual Manual pdf 212 page image

NV30LT-N OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCEPAGE 3.3.8 VERSION 0.1 2015-03-01Removing the Exciter’s BatteryRemove the battery on the exciter’s exciter/control PWB (A5A1) when the Exciter - Low Battery alarmappears (on the AUI or via remote digital output). Chemical leakage from an old battery can causedamage. The battery can be removed while ac power is applied to the transmitter.The optional exciter’s battery backup circuit will indicate an alarm when its voltage is below a pre-determined threshold, but it is not required for transmitter operation. If the battery fails, you canremove it without replacement. The backup battery in the controller assembly (A4) is the only backupbattery required in the transmitter.ProcedurePerform the following steps to remove the battery:1. Ensure ac power is being applied to the transmitter and the controller (exciter A) is operating asthe active exciter. The optional exciter should be set as the standby exciter and be inactive (disableautomatic transfer).2. Remove the front filter panel by loosening the 13 quarter-turn fasteners securing the panel to thetransmitter.3. Remove the right-hand upper, rear filter panel by loosening the 16 quarter-turn fasteners securingthe panel to the transmitter.4. Disconnect all interconnecting cables on the rear of the exciter and slide the exciter (A5) forwardenough to allow removal of its top cover. See Figure 3.3.3 on page 3.3.9 to locate the exciter andthe exciter/control PWB’s battery.5. Gain access to the battery by removing the exciter’s top cover.6. Remove the battery in XBT1 on the exciter/control PWB (A1); do not replace it.7. Re-install the exciter’s top cover and slide the exciter in place. Reconnect all interconnect cablesremoved in Step 4.8. Re-install the front and rear filter panels removed in Step 2 and Step 3.9. Check for any alarms on the front panel UI or the remote AUI (see “Viewing Transmitter Status -AUI” on page 3.2.82). Battery related alarms should clear.NOTE: It is not necessary to reset the time after removing the exciter’s battery. The controller willsynchronize the time setting.