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NetSure -48V DC Bulk Output Power System Installation and User Instructions (UM582127100)
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Rev. E
56
Clearing a Rectifier Communications Fail Alarm after Removing a Rectifier
If a rectifier module is removed from the system, a rectifier communications failure alarm is generated. If the
rectifier module will not be replaced, the alarm should be cleared.
Refer to the NCU Instructions (UM1M830BNA) for a procedure.
Clearing a Rectifier Lost Alarm
If the NCU Controller resets while a rectifier communications fail alarm is active, the rectifier communications
fail alarm is replace with a rectifier lost alarm.
Refer to the NCU Instructions (UM1M830BNA) for a procedure to clear the alarm.
Replacement Information
When a trouble symptom is localized to a faulty rectifier module, controller, or system circuit card; that
particular device or circuit card should be replaced in its entirety. No attempt should be made to troubleshoot
or repair individual components on any rectifier module, controller, or circuit card.
Refer to SAG582127100 (System Application Guide) for replacement part numbers.
Replacement Procedures
DANGER!
Adhere to the “Important Safety Instructions” presented at the front of this document.
Replacing a Rectifier Module
Refer to the Rectifier Instructions (UM1R483500E) for a rectifier module replacement procedure. Refer also to
“System Troubleshooting Information” on page 55.
The rectifier module being replaced is assigned by the NCU the lowest available identification number. If
desired, you can change the identification number. See “Configuring the NCU Identification of Rectifiers and
Assigning which Input Feed is Connected to the Rectifiers” on page 50.
Replacing the NCU Controller
Refer to the NCU Instructions (UM1M830BNA) for a controller replacement procedure.
Replacing the IB2 (Controller Interface Board)
The following circuit card replacement procedure can be performed with the system operating.
ALERT!
Circuit cards used in this power system contain static-sensitive devices. Read the Static
Warning at the front of this document before performing any of the following procedures.
ALERT!
When performing any step in these procedures that requires removal or installation of
hardware, use caution to ensure no hardware is dropped and left inside the shelf; otherwise service
interruption or equipment damage may occur.
NOTE!
When performing any step in these procedures that requires removal of existing hardware, retain
all hardware for use in subsequent steps.
Procedure
1.
Performing this procedure may activate external alarms. Do one of the following. If possible, disable
these alarms. If these alarms cannot be easily disabled, notify the appropriate personnel to disregard
any future alarms associated with this system while the procedure is being performed.