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Knowledge Base

UPS failing, with error code 0040-04 "Rectifier Fault"

Publication Date:  2014-12-31  |   Views:  1449  |   Downloads:  0  |   Author:  m00742852  |   Document ID:  EKB1000064568


Issue Description

microDC has UPS, Model: 3K UPS , Model N0:- UPS2000, Version:- V100R001C10SPC005, that become faulty at startup, it was not properly starting, and failing with code code 0040-04 "Rectifier Fault"

Alarm Information

While starting the UPS we are getting beep sound and below error in LCD, one alarm is critical and showing “Rectifier Fault”,  please forward it to UPS support team,

Handling Process

1. check the logs
2. check the connection
3. verify voltages (input & output)
4. check the Battery status (charging status)
5. check the battery mode

Root Cause

It is identified that the PDU and UPS cabling was wrong, input connection and output connection were interchanged, this connection is preinstalled and done at Factory level, if this error occured, we need to check the connection thoroughly 


UPS failed to start and showing error code 0040-04 "Rectifier Fault", than need to check the PDU  & UPS connection,


Rearrange the UPS input /output connections and started the UPS, it started successfully