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DPB1U & DPG1U SERIES
OPERATING MANUAL
P O W E R I N G T E C H N O L O G Y
Manual No. DPB-DPG-4
dpb_dpg-man-rev4-0317.indd
This document is believed to be correct at time of publication and UNIPOWER LLC accepts no responsibility for
consequences from printing errors or inaccuracies. Specifications are subject to change without notice.
12.0 SETUP AND TESTING
12.1
It is not necessary to have the distribution panel mounted in a rack for initial testing. This
can be done on a bench. It is also not necessary to have loads connected to the panel for
this testing.
12.2
With the input power source off, connect the input wires to the A side of the distribution
panel. Connect ground to the chassis ground terminal. Insert all fuses into fuse holders or
set all circuit breakers to on.
12.3
Turn on the input power source. The A side LED should be green. If it is red, one of the
fuses is blown or a circuit breaker is tripped. If the LED is off, there is no input power to
the unit. Check the output voltage at each set of output terminals with a digital voltmeter.
12.4
With the A side LED green, use an ohmmeter to check the Form C relay contact outputs.
On J4 measure the resistance between pins 1 and 2. This should read “open”. Measure the
resistance between pins 2 and 3. This should read “short”.
12.5
On the A side insert a blown fuse into fuse no. 1 position or trip circuit breaker no. 1. The
A side LED should turn red. On the upper row (side A) of wire wrap terminals, measure
the resistance between pins 1 and 2 and between pins 4 and 5. Both should read “open”.
Measure the resistance between pins 2 and 3 and between pins 5 and 6. Both should read
“short”. Replace the blown fuse with a good one or reset the circuit breaker.
12.6
On the A side check each succeeding fuse by replacing it with a blown fuse, or breaker by
tripping it, and verify that the LED turns red. It is not necessary to recheck the Form C
relay contacts.
12.7
Repeat the same tests of Sections 12.2 through 12.6 on the B side of the distribution panel.
Refer to table 5.
12.8
The distribution panel may now be connected to its intended application.
12.9
If the distribution panel did not operate properly in the above tests, go back and double
check the connections and the polarity of the input source to make sure it is correct.
Please note that there are no user serviceable parts inside and that opening the unit will void
the warranty.
If you are unable to resolve any problem call your nearest UNIPOWER sales office for
support:
US +1 954 346 2442 UK +44 (0)1903 768200
