Xtreme Power Conversion M90S Series User & Installation Manual page 28

M90S-4S User's Manual Uninterruptible Power Supply
Step 5: Make sure there is no warning or fault event happening. If there is, please refer to Chapter 6 Troubleshoot-
ing to solve it.
Step 6: Press Power ON/OFF button for two seconds to enter Line Mode as shown below.
After turned on, UPS will do self-test and start Inverter up. UPS will be transferred to Line mode when all power
modules are ready.
Xtreme Power Conversion Corporation Page 28