Xtreme Power Conversion M90S Series User & Installation Manual page 37

M90S-4S User's Manual Uninterruptible Power Supply
4.5.2 Transfer from Maintenance Bypass
Step 1: After the maintenance is completed, make sure all Modules have been installed properly.
Step 2: Please enter LCD SETUP MENU then choose "SYSTEM" to ensure that the "Static Bypass mode" is en-
abled. If the "Static Bypass mode" is disabled, you have to enable it. Then, exit the SETUP menu and ensure that
the UPS operates in static bypass mode.
Step 3: Switch OFF the Maintenance Bypass Breaker as shown below:
Step 4: re-insert the 2 screws on the MBS breaker cover. For the four and six slot chassis re-install the LCD display
panel housing.
2 Slot Chassis
4 and 6 Slot Chassis
Step 5: Turn on the UPS inverter
Xtreme Power Conversion Corporation Page 37