Bc bus fault of 9120 2KVA - Powerware 9120 UPS System

The VSD Fault G1F032 on an Ingersoll Rand 110 kW VSD (variable speed drive) likely indicates an issue with the drive's DC bus. This fault code indicates that the DC bus voltage has dropped below the acceptable range, which can cause the drive to trip or shut down.
Here are some steps you can take to troubleshoot this fault:

1. Check the incoming AC voltage to the drive to ensure that it is within the acceptable range. Low voltage or voltage fluctuations can cause the DC bus voltage to drop below the acceptable range.
2. Inspect the DC bus capacitors for signs of damage or leakage. Damaged or faulty capacitors can cause the DC bus voltage to drop and trigger the fault code.
3. Check the connections between the DC bus and the drive's power modules. Loose or faulty connections can cause voltage drops and trigger the fault code.
4. Check the drive's cooling system, such as the fans or heat sinks, to ensure that they are operating correctly. Overheating can cause the DC bus voltage to drop and trigger the fault code.
5. Consult the drive's manual or contact the manufacturer for additional troubleshooting steps or assistance.

It is important to take caution when working with electrical components and ensure that any modifications or repairs are done by a qualified technician.

https://repairpal.com/obd-ii-code-u0073-control-module-communication-bus-a-off

https://www.snapon.com/EN/US/Diagnostics/News-Center/CAN-Bus

https://www.obd-codes.com/u0073

Take it to a qualified repair shop, unless you know about C.A.N - controller area network - serial data communication network between modules . U1900 -20 - ic states that one of the 8 or 10 or more modules on your vehicle has stopped talking .
U1900 CAN Communication Bus Fault-Receive Error RCM REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Receive Error Occupant Classification Sensor REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Receive Error SJB REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Receive Error DVD Player REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Receive Error Audio Control Module (with Navigation) REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Receive Error Audio Control Module REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Receive Error SDARS REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Receive Error Retractable Running Board Module REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Recieve Error ABS Module REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Recieve Error Parking Aid Module REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Receive Error 4WD Control Module REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Receive Error Instrument Cluster REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 . U1900 CAN Communication BUS Fault - Receiver Error DSM REPAIR all other DTCs first. CLEAR the DTCs. CYCLE the key OFF then ON and wait 10 seconds. REPEAT the self-test. If DTC U1900 is still present, REFER to Section 418-00 .

apers ???? What's this ? U1900 CAN Communication BUS Fault-Receive Error ABS Module REFER to Section 418-00 . U1900 CAN Communication BUS Fault-Receive Error Instrument Cluster REFER to Section 418-00 . U1900 CAN Communication BUS Fault-Receive Error Trailer Brake Controller REFER to Section 418-00 .
Your best bet, take it to a qualified repair shop.

U1900 CAN Communication Bus Fault Vehicle Security Module REFER to Section 418-00 . U1900 CAN Communication Bus Fault 4WD Control Module REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Recieve Error Parking Aid Module REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Recieve Error DSM REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Recieve Error Instrument Cluster If the 4X4 light is not flashing at key ON, REFER to Section 418-00 .
If the 4X4 light is flashing at key ON, REFER to Section 308-07A . U1900 CAN Communication Bus Fault-Recieve Error Power Liftgate Module REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Recieve Error Stability Assist Module REFER to Section 418-00 . U1900 CAN Communication Bus Fault-Recieve Error Air Suspension Module REFER to Section 418-00 .
which module won't communicate ? need a up scale scanner to communicate with all the modules on the vehicle. Do you know what C.A.N - controller area network is ? Serial data bus (network) All the modules on the vehicle share data on the network . U code's indicate a problem with the network .

C.A.N - controller area network . is a serial date communication network for the control modules on the vehicle .
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Your best bet ,take it to a qualified repair shop

Quite a while! Click on show schedule
Greyhound com Step 1

http://www.fixya.com/support/t133894-powerware_9120_dc_bus_fault_problem

Download and install this driver for your chipset in your laptop:
http://global-download.acer.com/GDFiles/Driver/Chipset/Chipset_Intel_9.2.2.1034_W7x86_A.zip?acerid=634624618277356176&Step1=Netbook&Step2=Aspire%20One&Step3=AOD270&OS=722&LC=en&BC=Acer&SC=PA_6

It will fix this problem.

You need to reinstall your chipset driver for your computer... You can get it here:
http://global-download.acer.com/GDFiles/Driver/Chipset/Chipset_Intel_9.2.2.1034_W7x86_A.zip?acerid=634624618277356176&Step1=Netbook&Step2=Aspire%20One&Step3=AOD270&OS=722&LC=en&BC=Acer&SC=PA_6