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 5-25
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39) Press and release the FUNCTION SET ENTER key.
40) “ARE YOU SURE?” is displayed. Press and release the FUNCTION SET YES
(+) key.
41) Press and release the FUNCTION SET YES (+) and NO (-) keys simultaneously,
to return to the beginning of the MCA menu tree.
Checking High Voltage Shutdown
Caution: This procedure may interrupt power to the load. Perform this test only
during system initial startup and checkout, or when a load is not
connected to the system.
Note: This procedure cannot be performed if there are active Rectifier alarms.
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 SYSTEM VOLTS & AMPS is displayed.
3) Press and release the FUNCTION SET ENTER key.
4) Repeatedly press and release the FUNCTION SELECT DOWN arrow key until
TEST H.V. SHUTDOWN = vv.vvV is displayed.
5) Press and release the ALARM CUTOFF and FUNCTION SET ENTER keys
simultaneously. A WARNING appears on Line 2 of the display.
6) Press and release the ALARM CUTOFF and FUNCTION SET ENTER keys
simultaneously if you wish to proceed. Line 2 of the display is replaced by
"CHANGE THE VARIABLE".
7) Press the FUNCTION SET NO (-) key until the value displayed is decreased to
below system voltage level, then release the key.
Note: If the load on the system is light, you have to decrease the value well below
the system voltage level before the requirements are met.
Note: For the 480V rectifiers only, the fans WILL NOT shut off.
a) Requirement: The high voltage shutdown circuit on all Rectifiers activates
to shut down the Rectifiers. After approximately four seconds, the restart
circuit is automatically activated to restore Rectifier operation.
b) Requirement: All Rectifier "FAIL” indicators go red while the Rectifiers are
shut down.
c) Requirement: MCA MAJOR indicator flashes red while the Rectifiers are
shut down, if battery is connected to the system.
d) Requirement: MCA displays one or more PCUs HAVE FAILED while the
Rectifiers are shut down, if battery is connected to the system.
e) Requirement: External alarms activate (if configured) while the Rectifiers
are shut down.
Checking Remote High Voltage Shutdown and
Rectifier Emergency Shutdown (ESTOP) Inputs
The Remote High Voltage Shutdown and Rectifier Emergency Shutdown (ESTOP)
circuits can be tested without affecting the system by applying a Test loop closure