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ZY120 6-20kVA (11) User Manual EN rev.04.doc
breaker (this step only for long backup time model), after that close the input breaker. At
this time the fans rotate and the UPS operates in Bypass mode.
2) After REC led is ready green, pressing the ON/OFF button continuously for more than 1
second, then choose ON to enter, the INV green led flickers.
NOTE
In some application, UPS is set to start automatically, this step is not need.
3) About 1 minute later, the UPS turn into normal Line mode. If the utility power is abnormal,
the UPS will operate in Battery mode without output interruption of the UPS.
2. Turn on the UPS from battery without utility power
1) After you make sure that the breaker of the battery pack is in the “ON” position (this step
only for long backup time model).
2) Press the ON/OFF button once to power on the LCD, then press ON/OFF button again,
choose ON to enter.
3) A few seconds later, the UPS turns into Battery mode.
3. Turn off the UPS in normal mode
1) Press ON/OFF button in condition of normal mode, then choose OFF to transfer to bypass.
2) Open the input breaker to turn off utility power supply, then open the battery breaker to turn
off UPS completely.
4. Turn off the UPS in Battery mode
1) To power off the UPS by pressing the ON/OFF button continuously for more than 1 second,
then choose OFF.
2) When being powered off, the UPS will turn into No Output mode. Finally not any display is
shown on the display panel and no voltage is available from the UPS output.
NOTICE：Please turn off the connected loads before turning on the UPS and turn on the loads one by
one after the UPS is working in INV mode. Turn off all of the connected loads before turning off the
UPS.
7.2 Parallel Operation
1. Parallel Machine Maintenance
This UPS system has parallel machine function, if you want to add single machine to parallel
system, please follow operational process of joining new machine; if you must remove UPS,
please follow operational processes of removing parallel machine.
2. How to install a new parallel UPS system:
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