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CAUTION
"Bypass Voltage Range", "Inverter Synchronize Frequency Range", "Inverter Output Voltage"
and "Output Voltage Adjustment" are adjustable parameters but for parallel function eve-
ry unit must have the same settings
• Change item by pressing < > until the display shows the text "Save". Press < Enter > to save the
setting.
• Turn off the UPS utility input breaker (CB1) while the LCD shows "LINE OFF" to reset the UPS.
Basic Function Check
• Turn on the AC input (UPS utility input breaker) and then turn on the UPS inverter (press <ON>)
• Test the UPS switching from normal mode to stored energy mode and viceversa
• Verify that the LCD panel works normally and doesn't display errors.
Output Error Voltages Check
• Verify the output voltage for each UPS unit (at 0 load), and make sure the voltage difference
between each unit is under 0.5Vac.
• If the voltage difference is between 0.5~1.0Vac, the parallel error current will be higher.
• If the voltage difference is over 1.0Vac, a calibration should be performed on the unit(s) which
has over-limit error voltage otherwise the parallel could fail (If this condition occurs please con-
tact your local dealer for technical support)
Turn off the inverter (press <off>) and then the AC input (Turn off CBi and the UPS utility input
breaker) and restart the process for the next unit.
10
®
3 Single Unit Check
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