Application Guide

Section 5876 Installation Instructions
Issue AT, April 26, 2013 Spec. No. 582140000 (Models 802
NLDB, 802NLEB and 802NL-B)
Page 5-28 Chapter 5. Installing the Rectifiers and Initially Starting the System
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2) Press and release the ALARM CUTOFF key.
a) Requirement: External MCA audible alarm silences.
b) Requirement: MCA ALARM CUTOFF indicator goes yellow.
3) Wait the pre-programmed MCA audible alarm cutoff reset time interval (if set).
a) Requirement: External MCA audible alarm again sounds.
b) Requirement: MCA ALARM CUTOFF indicator goes out.
4) Return the Standby/Operate switch on the Rectifier to the I "operate" position.
a) Requirement: External MCA audible alarm silences.
Checking AC Fail Alarm
Procedure
1) Open one of the AC input circuit breakers that supplies power to the Rectifiers (if
furnished), or open the external AC disconnect or protective device that supplies
power to one of the Rectifiers.
a) Requirement: Rectifier “AC” indicator goes out.
b) Requirement: Rectifier “FAIL” indicator goes red.
c) Requirement: MCA “AC” indicator goes red.
d) Requirement: MCA “MINOR” indicator goes red (power removed from one
Rectifier).
e) Requirement: MCA displays 1 PCU HAS FAILED.
f) Requirement: If a PDSC Surge Suppression Option is furnished, the MCA
displays a "Binary Input Customer Text Message" in the I/O Board Alarm
Detail Message.
g) Requirement: External alarms activate (if configured).
2) Open a second AC input circuit breaker that supplies power to the Rectifiers, or
open the external AC disconnect or protective device that supplies power to a
second Rectifier.
a) Requirement: Rectifier “AC” indicator goes out.
b) Requirement: Rectifier “FAIL” indicator goes red.
c) Requirement: MCA “MINOR” indicator goes out.
d) Requirement: MCA “MAJOR” indicator flashes red.
e) Requirement: MCA displays 2 PCUs HAVE FAILED.
f) Requirement: External alarms activate (if configured).
3) Return both external AC disconnects, protective devices, or internal AC input
circuit breakers to the ON position.
a) Requirement: Rectifier “AC” indicators on both Rectifiers go green.
b) Requirement: Rectifier “FAIL” indicators on both Rectifiers go out.
c) Requirement: MCA “AC” indicator goes green.
d) Requirement: MCA “MAJOR” indicator goes out.