Powerware Uninterruptible Power Supply SOLA 4000 - Manual (Page 52)

SOLA 4000 - Installation and Initial Start-Up
JUE 401265 52
• If your unit has separate supplies for the rectifier and bypass
(terminals 4-L1, 4-L2, 4-L3, 4-N), switch on the external supply
for the bypass. Check that the bypass supply voltage at termi-
nals 4-L1, 4-L2, 4-L3, 4-N is within ±10% of the nominal input
voltage.
If there are no separate input terminals then the bypass input is
the same as that checked previously for the rectifier input.
• Close IUG.
• Close IRE.
? Does the display on the CPHC16 -S pcb for the bypass give the
indication "P"?
yes • Open IRE and exchange any two of the cables at the bypass
input terminals 4-L1, 4-L2, 4-L3.
• Return to E.
no • Are the status LEDs (green) 1, 2, 3, 14, 16, 17, 19, 26, on the
operating panel continuously on?
no: Check that the mains frequency is in tolerance.
OK?
yes: Is the pcb CPHC16 -S for the bypass
correctly functioning? The display should be
rotating clockwise.
no: Call for service assistance.
yes: Check again the input supply. Check
that it is in accordance with the UPS
rating label.
no: The mains frequency must be within
tolerance in order for the bypass to be
availabe
yes: Continue with F.
F: Synchronisation Check • Check that the green LED LD1 on the ICT-2 pcb is permanently
lit and there is no "S" indication on the bypass electronics.
• On the SS/FY pcb, measure the voltage between the screws
Bypass R and Inverter R. Then repeat for the other two phases.
? Are the voltages < 25Vac?
no • If the voltage is continuously fluctuating from 0 to 400V there is
a synchronisation problem. Switch off IRE and call for service
assistance.
If the voltage is slightly higher but relatively constant and the
default values have been re-entered using the serial interface
on the CPHC16 -S p.c.b., then the synchronisation may need to
be re-adjusted. This can be easily confirmed by comparing the
two sinewaves for a possible phase difference.
Are the two waveforms phase-shifted?
yes: The synchronisation must be re-adjusted using the serial
interface of the CPHC16 -S pcb and the PSRS232 and a
portable computer.
2 Initial Start-Up