How to take ups in manual bypass mode. - Eaton PW9390 UPS System

Test outlet power by switching the unit to manual bypass and breakers off.
If power is supplied OK and the filter board repaired OK then restart the unit starting with the breakers supply to unit,battery confirm the display is on and static bypass led also on then switch back the bypass knob to normal and press the on button to switch the unit to normal.
Give the batteries time to charge 12hours then you can test the unit on backup mode.

it looks like you have a faulty static switch

what is the bypass voltage is it within the windows if not, UPS is ok no problem

Place UPS into internal Bypass (Static Bypass) via the display. Then place unit back to Normal from Internal Bypass(Static Bypass). See if that helps. Or shut the unit down completely by placing UPS into Static Bypass first and then place UPS into external bypass mode, switch is located on the bottom front of the UPS. Please follow the UPS Manual to help you understand the procedures. Also recommend doing this after hours, not during business hours.

Not sure what you mean by load the batteries. Replace them? Yes. Bypass mode is typically used when servicing the unit. You can email Eaton if you like: [email protected]
Here is the legacy documentation page for the 9120 UPS:

First calculate the total load of the UPS and then calculate the total load. One of the Intel Module is Primary and one is Secondary. I can't remember exactly which one is primary. Q1. There will be a LED on the INTELI MODULE flashing RED. That identifies the bad MODULE. Q2. You can remove the MODULE, but I recommend you place the UPS in Static Bypass first through the Display Menu. Also make sure the UPS is in NORMAL MODE or already in STATIC BYPASS, the LED's on the Display should indicate what mode its in. Q3. You can remove the display from the Inteli Module with out harming the load. You just can't do anything with the UPS, as to tell it to Go to Bypass (Static Bypass) or get out of Bypass, check voltages, etc. So order the part first by getting part number on the sticker off the Module, then schedule your shutdown and perform the you maintenance after hours this way you don't affect anything during business. Also don't do the repair on a Friday due to the fact its weekend and APC/Third party UPS companies will charge you a lot to come out in the weekends. FIRST DO THIS PLEASE- GET THE MANUAL FOR THIS UNIT!!!! And READ IT FIRST!! Find in the manual where it walks you through putting the UPS In bypass (Static Bypass). Follow the manual, My way of doing is to READ TWICE, OPERATE UPS ONCE!! This has help me not dump any loads. My suggestion to you is to check if unit is in Bypass (static Bypass due to the faulty module. If it is on Bypass then all you need to do is follow the procedures to place UPS in External Maintenance Bypass. If UPS is in Normal mode but with Alarms and Beeping, then Navigate through the display and find the BYPASS Mode. Then hit enter Yes on the BYPASS MODE, it will ask you again if you want to "Place UPS INTO BYPASS. Hit YES. You will hear it click. Your LED on the display should Light UPS Solid "BYPASS LED ON" AGAIN Please keep referring to the MANUAL. Once your in bypass mode (Static Bypass) then you can operate the External Bypass Switch on the bottom of the UPS. That is the Maintenance Bypass Switch. This isolate the UPS completely and your load never see's the transfer from Static Bypass to External Bypass, Because its a MAKE BEFORE BREAK System. (Make the power before Breaking the Power) Sorry to get down to simple terms, but when I work on a UPS its personal due to the fact you are responsible for the all that is on the OUTPUT of that UPS. Once on External Bypass, You can now do you module swap. Turning the UPS back on, Please follow place UPS back On Line in the UPS Manual. Also in the Diagnostics, off the display of the unit, it also identifies what module is bad including the Power Modules to the Battery Modules.

Bypass not available is a common alarm.

This is because the input and ouput parameters

volts and frequency do not match, suggest checking these with meter or using ups sw and comp.

Bypass will not function if either v or f is incorrect, check manual for specs.

Post more info about batt on load with mains conected please, as this could mean major fault such as rectifier failure or micro malfunction

Hope this helps, thanks for asking FixYa

This an excerpt from the UPS's manual:
The Bypass LED illuminates indicating that the UPS is in bypass mode. Utility power is sent directly to connected equipment during bypass mode operation. Bypass mode operation is the result of an internal UPS fault, an overload condition, or a user initiated command through an accessory. Battery operation is not available when the UPS is in bypass mode.

First Press the user menu button
then scroll up or down till you reach on put UPS on bypass? Press C to change to YES if the default is already YES just press the # button then the UPS will go on bypass mode.

Go to UPS bypass panel and turn the bypass switch to (1) ON and Switch the Output on the bypass panel to off. Now you're already on a bypass mode.

if you have any query please drop me an email.

Thanks