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OM-2010
3. Operation Procedure
A. Input Control Functions
(1) Turn on S1 input contactor switch (4, Fig. 1).
(2) Verify that only the amber input power light (7, Fig. 1) glows. If the light glows, no problem exists
requiring service.
B. Output Control Functions
(1) Hold the S2 output contactor switch (4, Fig. 1) in the up "CLOSE" position long enough for the
green output contactor light (10, Fig. 1) to glow.
(2) Release S2 switch to the middle "ON" position.
(3) Verify that M1 DC ammeter (5, Fig. 1) does not read an excessive amperage. Release S2 switch.
(4) The DC power supply should continue to deliver power until the S2 switch is placed in the down
"OFF" position or one of the other control means functions to turn the unit "OFF".
C. Voltmeter
(1) Verify on the M2 DC voltmeter (6, Fig. 1) that the DC output voltage level is correct. If not, turn off
power supply, disconnect your load, and refer to Service, Chapter 3 for instructions.
D. Output Current Limit
(1) If the DC ammeter continuously reads more than 600 A DC after start-up, immediately turn R13
current limit control (9, Fig. 1) down to continuous operation current point, normally 600 A DC. This
may prevent automatic overload trip out or blowing of fuses or tripping of circuit breakers at the
source of input power.
(2) If R13 has no effect or if the output current cannot be decreased to about 250 A DC at the R13
minimum position, a faulty SCR device or control circuit malfunction is indicated requiring power sup-
ply repair. Refer to Chapter 3 for service instructions.
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April 10/89 Revised
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Table of Contents
Troubleshooting
