IST Series UPS (10kVA-200kVA)
User Manual 5 Use and Operation
75
When the bypass input voltage or frequency exceeds the setting value, shutting down the inverter will
cause system without output, and the power supply for load will be interrupted.
5.3.5 Switch to Maintenance Bypass Mode From Inverter Output
Unless professional person, no one can perform the following operation. Manufacturer does
not take charge of the problem caused by the operation of untrained person.
Step 1 In system management page, click the ON/OFF icon , it will enter ON/OFF page. Select
OFF icon and press the OK icon for more than 3s, the inverter will be shut down.
The inverter also can be shut down by OFF combination button on the panel, but generally, it is not
suggested to operate like this.
Step 2 After switch to bypass and the energy flow on the touch screen show as bypass output, open
the cover of manual maintenance breaker at the back of the cabinet, place the manual
maintenance breaker to ON position.
Step 3 Disconnect the bypass breaker (BYPASS), mains input breaker (POWER), output breaker
(OUTPUT) (detail position please seeFigure2-8) and battery breaker of battery cabinet.
During maintenance, it is strictly forbidden to close the output breaker (OUTPUT).
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