Application Guide

Installation Instructions Section 5876
Spec. No. 582140000 (Models 802
NLDB, 802NLEB and 802NL-B) Issue AT, April 26, 2013
Chapter 5. Installing the Rectifiers and Initially Starting the System Page 5-29
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e) Requirement: MCA displays SYSTEM OK message. (If a PDSC Surge
Suppression Option is furnished, the MCA "Binary Input Customer Text
Message" goes away.)
f) Requirement: External alarms reset (if configured).
Checking Rectifier Fail Alarm
Procedure
1) Place the Standby/Operate switch on a Rectifier installed in the system to the
"standby" position.
a) Requirement: Rectifier “AC” indicator goes out.
b) Requirement: Rectifier “FAIL” indicator goes red.
c) Requirement: MCA “MINOR” indicator goes red.
d) Requirement: MCA displays 1 PCU HAS FAILED.
e) Requirement: External alarms activate (if configured).
2) Place the Standby/Operate switch on another Rectifier installed in the system to
the "standby" position.
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 Standby/Operate switches to the I "operate" position.
a) Requirement: Rectifier “AC” indicators on both Rectifiers go green.
b) Requirement: Rectifier “FAIL” indicators on both Rectifiers go out.
c) Requirement: MCA “MAJOR” indicator goes out.
d) Requirement: MCA displays SYSTEM OK message.
e) Requirement: External alarms reset (if configured).
Checking System High Voltage Alarm 1
Procedure
1) With "SYSTEM OK" being displayed on the MCA Interface Pad, press and
release the FUNCTION SET ENTER key.
2) Repeatedly press and release the FUNCTION SELECT DOWN arrow key until
ADJUST THE ALARM SETPOINTS is displayed.
3) Press and release the FUNCTION SET ENTER key.
4) SYSTEM HI VOLTAGE #1 = vv.vvV is displayed.
5) Record the value indicated on the display.
6) Press and release the ALARM CUTOFF and FUNCTION SET ENTER keys
simultaneously. Line 2 of the display is replaced by "CHANGE THE VARIABLE".