ADTRAN T200 H2TU-R Installation And Maintenance Manual
Also see for T400: Installation and MaintenanceInstallation & maintenanceInstallation and MaintenanceInstallation and MaintenanceInstallation and Maintenance
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Contents
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61150090L1-5A Section 61150090L1-5A, Issue 1 15Figure 13. Primary & Secondary Fan Boards3. TESTINGGeneralEach test identifies a particular malfunction. For thatreason associated components used to isolate amalfunction are assumed to be functioning correctly.Certain troubleshooting requires personnel at both theCentral Office to monitor the FPU, and field personnelat the cabinet to determine if a fault condition exists.Refer to Figure 13 to identify fan board componentlocations.Fan Board IndicationEach fan board has two status indicator lights:• DOOR (Red) LED (Power and Door Alarmindication)• FAN (Green) LED (Thermostat position)Door SwitchFront and rear door switches are identical. Thefollowing description applies to both. The door switchresponds to three conditions:• Door closed• Door open• Manual overrideWhen the door is closed the switch contacts are closedallowing power to the fan.When the door is opened the switch contacts opensecuring power to the fan. Board circuitry recognizesthe condition and sends a door open “intrusionnotification” alarm to the FPU at the CO, and alsoturns the door LED On at the corresponding fanboard.Manual override is electrically identical to the doorclosed condition.During cabinet maintenance the manual override (orclosing the door) resets the alarm at the FPU.Indication that the alarm has reset is by thecorresponding door LED turning Off.Verify Power at the Fan BoardsPower is present at the corresponding fan board if thered Door LED comes On when the door is opened.Verify that the primary fan board is receiving power:1. Push-in and release the rear door switch.2. If the primary fan board Door LED goes On, theprimary fan board has power. At the CO theFPU Door Alarm LED will turn red.3. Disable the rear door switch by centering the rodand pulling outward. The primary fan boardDoor LED should go Off and the Door AlarmLED at the FPU will turn green.Verify that the secondary fan board is receivingpower:1. Push-in and release the front door switch.2. If the secondary fan board Door LED turns On,the secondary fan board has power. At the COthe FPU Door Alarm LED will turn red.SecondaryFan Boardto Cable APimaryFan Boardto Cable AThermostatThermostatFan LED(thermostat)FrontDoor LEDRearDoor LEDFan LED(thermostat)JP1JP4 JP2JP2To RearDoor SwitchTo FrontDoor Switch |
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