Xtreme Power Conversion Corporation
TX91 3.8- 10kVA User’s Manual
Page 21
Uninterruptible Power Supply
Adjusting charging current:
1. In bypass mode, press “Test/UP” button and “Mute/Down” button simultaneous for more than 1s to
enter the setting menu.
2. Press the “Mute/Down” button until it shows 17 in parameter 1 and press “Enter” button to adjust the
charging current. (Check 3-7 LCD setting for the details.)
3. In parameter 2, you can select the charging current from 1A to 4A by pressing “Test/UP” button or
“Mute/ Down” button. Select the charging current based on the number of battery strings. One string
equals 1A, if the number of battery strings is 2 then set it to 2A, if the battery strings is 3A set it to 3A,
anything 4 strings or more set it to 4A.
4. Confirm the setting by pressing the “ON/Enter” button.
5. In parameter 3, it is to adjust the charging current according to the deviation between the actual charg
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ing current and the setting value of the current.
For example, you want to have the charging current in 4A, but in fact, the charging current is measured
only 3.6A. Then, you need to select “+” and change the number to 4 in parameter 3. It means the setting
charging current will be added 0.4A as output charging current. Then, confirm this modification by press
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ing “ON/Enter” button. Now, you may press “Test/UP” and “Mute/Down” buttons at the same time to exit
the setting mode.
NOTE 1: Be careful that the maximum charging current does not exceed the battery accepted charging current.
NOTE 2: All parameter settings will be saved only when UPS shuts down normally with internal or external battery
connection. (Normal UPS shutdown means turning off input breaker in bypass/no output mode).