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PCHS/TPCHS SERIES Quick-Set PowerCassette®
INSTALLATION & OPERATING MANUAL
Manual No. tpchs-2
pchs-tpchs-man-rev2-1214.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.
for a single PowerCassette across the outputs Connect a color-coded, twisted pair of remote
sense leads to each respective load, being careful to connect the correct polarity.
Turn on or plug in the input power source. Check the voltage across each load with a digital
voltmeter. Each voltage should be within about ± 1% of its nominal value. The Input Power
Good and Output Power Good green LEDS should be on for both units.
While the rack is operating, disengage PowerCassette A (left one) and check the output
voltages. They should be very close to the previous values and the DC Power Good
green LED(s) should remain on for the other PowerCassette(s) which are now carrying
the full power load. Re-insert PowerCassette A and repeat the procedure by disengaging
PowerCassette B. Repeat this for PowerCassette C of the three-unit rack. The complete
rack has now been shown to operate properly in the redundant mode with hot swapping.
Disconnect the input power source.
20.0 TROUBLESHOOTING GUIDE
If you encounter difficulties in getting the Quick-Set PowerCassettes or the complete rack to operate
properly, go through the following troubleshooting guide.
Symptom
Possible Cause
Action to Take
No output, Input
Good and Output
Good LEDs off.
No input power.
Check connection to input power source.
No output, Output
Good LED off, Input
Good LED on.
Remote Enable in OFF
mode.
Check source circuit breakers.
No output, Output
Good LED off, Input
Good LED on.
Shorted output.
Make sure Pin 27 (Enable) is at logic LO or
connected to Signal Ground, Pin 22, of the
large Positronics connector.
No output, Output
Good LED off, Input
Good LED on.
Overvoltage protection
(OVP) has latched.
Check for short and remove.
No output, Output
Good LED off, Input
Good LED on.
Overtemperature protection
is activated.
Reset output by cycling the input power OFF
for 10 seconds and then back ON.
No output, Output
Good LED off, Input
Good LED on.
Total output load is too
large for the PowerCassette
capacity.
Allow PowerCassette to cool down for about
10 minutes. It will then start up automatically.
Check to see if the cooling fans are operating.
Reduce loads to proper levels.
If you are still unable to resolve any problem call your nearest UNIPOWER sales office for support:
US +1 954 346 2442 UK +44 (0)1903 768200
QUICK-SET PowerCassette®
MODEL SUFFIX SELECTOR
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
