Eaton POWERWARE Plus 18, Manual

Page: 165 / 311

18 Troubleshooting and
will turn the Rectifier on. Measure the DC voltage from El for a reading of 410
the voltage from El should read 205 VDC and from E3
should read -205 MC. these voltages are good then the is operating. Press
the UPS OFF button and wait 5 minutes before reconnecting wires 22
23.
To
isolate
the from the open the and wires 29 and 30
from and
the maintenance mode and press the UPS ON button
three times. Measure the AC voltage from and l-3. These voltages should
the output voltage at the Front In the
should only be TB l-3 to TB l-4. If these. voltages match the
voltage set at the front panel the inverter is operating. Press the UPS OFF button three
and wait 5 before reconnecting 29 and 30.
To
isolate
the logic from the logic open CB 1 of the system and open the
and from the control card Reapply input
power and measure pins l-2 for VDC, 3-4 for VDC. and 5-6 -15
VDC.
To isolate the Rectifier logic from the front panel open CB 1 of the system, remove Front
Panel and
from the panel. Close measure pins
l-2 for pins 3-4 for and pins 5-6 for -15 VDC.
PHASE RELATIONSHIP WITH VOLTMETER
To determine the phase of either the input or the output
measure the phase to voltages and than add them together. Then meaaure the
to phase voltage and the two. If the phase to neutral voltages add up to
equal the phase to phase voltage the angle is 180”. If the phase to neutral voltages
add to be approximately 115% the phase to phase the phase angle is 120”.
EXAMPLE: (1) L.-N = 119 VAC L-L = 237 VAC
L-N=
237 VAC
L-N 119 VAC L-L = VAC
237 VAC L-L + 120”
7.12 BATTERY TEST INFORMATION
Battery Procedure
The following may be used to if a battery tray batteries am
Test
Connect a ohm 300 watt resistor in to the mate-n-lock of the individual
battery tray for approximately voltage under load at the of
the resistor. If the battery tray determined to be bad the resistor and remove
the tray from the system. the and measure the voltage of the
individual batteries to identify the bad battery.
7-19