SURT100XLI Fault and LED 3 and 4 illuminated

[Anonymous user]

Hi,

I have a SURT1000XLi which has gone into a fault state, dropping output power.  The UPS will not power on, but when connected to mains power, the rear fan turns on, and after about 4 seconds it illuminates the Fault LED, as well as the 3rd and 4th (from the top down) battery LEDs.  All these LED stay on solid - they do not flash.

Can anyone advise what fault condition this combination of LEDs indicates?

Some additional details:

UPS age: 4yr 6mths

Battery age: 11months

UPS load at failure: 12%

The UPS is remotely monitored via StruxureWare DCE, and I am not aware of any external event which may have caused this fault condition to occur.

Thanks in advance for any assistance.

[Anonymous user · Accepted solution]

Found the answer.

The light pattern indicates a DC/DC converter fault.

Full list of codes below which may be of interest to others.

Fault Codes Explanation:

SURT firmware stores the failure code any time the unit goes into the failure bypass or ups failure states. It also stores the overload failure in the bypass state if applicable. The failure code is stored in the EEPROM and is therefore preserved until overwritten with a new value or until the EEPROM is cleared. The code can be retrieved with UPS-Link "Ctrl-U" when in programming mode only.

 The fault status can be decoded by relating the battery charge capacity bar graph and moreover the Ctrl-U result to the appropiate codes list.

 These are the codes for the different UPS models.

1) 230Vac models of SUOL/SURT 1000 & 2000 (Lynx 1):

     Fault                                        Display                                     Ctrl-U

Overload (includes short circuit)       Overload LED                                       40

Inverter fault                                    First / lowest capacity LED                    02

Transfer relay weld                          Second capacity LED                            01

PFC failure                                      Third capacity LED                                04

DC bus overvoltage                        Fourth capacity LED                              10

Overtemperature                              Fifth / highest capacity LED                   20

Output overvoltage                          First and second capacity LEDs            08

DC/DC converter fault                     Second and third capacity LEDs            80

Unknown fault (just in case)                   All capacity LEDs                                  00