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4. Trouble Shooting

 

If the UPS system does not operate correctly, please solve the problem by using the table below.   

Symptom 

Possible cause 

Remedy 

No  indication  and  alarm  in  the  front 
display panel even though the mains is 
normal.   

The  AC  input  power  is  not 
connected well. 

Check  if  input  cable  firmly 
connected to the mains.   

The  icon 

and  the  warning  code   

‘0b’    flash  on  LCD  display  and  alarm 
beeps every second. 

EPO  function  is  activated.  At 
this  time,  the  EPO  switch  is  in 
“OFF”  status  or  the  jumper  is 
open. 

Set the circuit in closed position 
to disable the EPO function.   

The  icon 

and 

 

flash  on  LCD  display  and  alarm  beeps 
every second. 

The  external  or  internal  battery 
is incorrectly connected. 

Check  if  all  batteries  are 
connected well. 

The  icon 

  and

 

flash  on  LCD  display  and  alarm  beeps 
twice every second. 

UPS is overload.   

Remove  excess  loads  from 
UPS output. 

UPS  is  overloaded.  Devices 
connected  to  the  UPS  are  fed 
directly 

by 

the 

electrical 

network via the Bypass. 

Remove  excess  loads  from 
UPS output. 

After  repetitive  overloads,  the 
UPS  is  locked  in  the  Bypass 
mode.  Connected  devices  are 
fed directly by the mains. 

Remove  excess  loads  from 
UPS  output  first.  Then  shut 
down the UPS and restart it. 

Fault  code  is  shown  as  43.  The  icon 

  lights  on  LCD  display 

and alarm beeps continuously. 

UPS  is  overload  too  long  and 
becomes  fault.  Then  UPS  shut 
down automatically. 

Remove  excess  loads  from 
UPS output and restart it. 

Fault  code  is  shown  as  14,  the  icon 

  lights  on  LCD  display,  and 

alarm beeps continuously. 

The 

UPS 

shut 

down 

automatically  because  short 
circuit  occurs  on  the  UPS 
output. 

Check  output  wiring  and  if 
connected  devices  are  in  short 
circuit status. 

Other  fault  codes  are  shown  on  LCD 
display and alarm beeps continuously. 

A  UPS  internal  fault  has 
occurred.   

Contact your dealer 

Battery  backup  time  is  shorter  than 
nominal value 

Batteries are not fully charged 

Charge the batteries for at least 

hours 

and 

then 

check 

capacity.  If  the  problem  still 
persists, consult your dealer.   

Batteries defect 

Contact  your  dealer  to  replace 
the battery. 

Summary of Contents for Liebert GXT-MT+10KVA

Page 1: ......

Page 2: ...instructions in this manual strictly Save this manual properly and read carefully the following instructions before installing the unit Do not operate this unit before reading through all safety info...

Page 3: ...2 4 UPS INSTALLATION FOR PARALLEL SYSTEM 7 2 5 SOFTWARE INSTALLATION 8 3 OPERATIONS 9 3 1 BUTTON OPERATION 9 3 2 LED INDICATORS AND LCD PANEL 9 3 3 AUDIBLE ALARM 11 3 4 SINGLE UPS OPERATION 11 3 5 PAR...

Page 4: ...nect appliances or devices which would overload the UPS e g big motor type equipment to the UPS output sockets or terminal Place cables in such a way that no one can step on or trip over them Do not b...

Page 5: ...ipment can reasonably be expected to cause the failure of the life support equipment or to significantly affect its safety or effectiveness is not recommended Do not use this equipment in the presence...

Page 6: ...mains Ensure that no liquid or other foreign objects can enter into the UPS system The UPS can be operated by any individuals with no previous experience 1 6 Standards Safety IEC EN 62040 1 EMI Condu...

Page 7: ...s The shipping package contains One UPS One user manual One monitoring software CD One RS 232 cable option One USB cable One parallel cable only available for parallel model One share current cable on...

Page 8: ...for parallel model 5 Parallel port only available for parallel model 6 Intelligent slot 7 Power stage fan 8 External battery connector 9 Bypass Input Circuit Breaker Only available for dual input uni...

Page 9: ...x3 LB 10 10 8 8 8 NOTE 1 The cable should be able to withstand over 40A current It is recommended to use AWG 10 or thicker wire for Phase and AWG 8 or thicker wire for Neutral for safety and efficienc...

Page 10: ...ake sure the voltage of the battery pack is correct Pay highly attention to the polarity marking on external battery terminal block and make sure the correct battery polarity is connected Wrong connec...

Page 11: ...8 Wiring diagram of parallel system 2 5 Software Installation For optimal computer system protection install UPS monitoring software to fully configure UPS shutdown...

Page 12: ...play next selection in setting menu Mute Down Button Mute the alarm Press and hold the button more than 0 5s to mute the buzzer Please refer to section 3 4 9 for details Down key Press this button to...

Page 13: ...put and output voltage frequency battery voltage load information and internal temperature Vac input output voltage Vdc battery voltage Hz frequency load level C F temperature Load information Indicat...

Page 14: ...rotect your precious devices you should turn on the UPS Refer to next step 2 Press and hold the ON button for 0 5s to turn on the UPS and the buzzer will beep once 3 A few seconds later the UPS will e...

Page 15: ...n bypass acceptable range it will cut off output directly 4 Charge the batteries 1 After the UPS is connected to the utility power the charger will charge the batteries automatically except in Battery...

Page 16: ...section 6 Test the batteries 1 If you need to check the battery status when the UPS is running in AC mode CVCF mode you could press the Test button to let the UPS do battery self test 2 Users also can...

Page 17: ...urn off the UPS If the load couldn t be cut off you should remove the cover of maintenance bypass switch on the rear panel and turn the maintenance switch to BPS position first 3 Switch off the line i...

Page 18: ...tion 3 4 7 Then follow the wiring procedure in section 2 4 4 Remove the cover of parallel share current cable port on the UPS connect each UPS one by one with the parallel cable and share current cabl...

Page 19: ...If the bypass is abnormal you can not remove the UPS without interruption You must cut off the load and shut down the system first 2 Make sure the bypass setting is enabled in each UPS and then turn o...

Page 20: ...BD Not allowed OPN Allow CHE Check RES Reserved L1 The first line L2 The second line L3 The third line 3 7 LCD Setting 3 7 1 LCD Main Interface A Single model Press up and down key to select the displ...

Page 21: ...unit 3 7 2 LCD Setting At the main interface press and hold the up and down buttons simultaneous for more than 1 second to enter or escape from setting menu Parameter 1 Parameter 2 There are two param...

Page 22: ...ptions 18 Reserved 19 Reserved 20 Neutral loss detection Y Y Y Y Y Y 21 Battery voltage calibration Y Y Y Y Y Y 22 Charger voltage adjustment Y Y Y Y Y Y 23 L1 inverter voltage adjustment Y Y Y 24 L2...

Page 23: ...uency is not within 46 54 Hz If 60 Hz is selected in Output frequency setting UPS will transfer to battery mode when input frequency is not within 56 64 Hz Note For single unit it will have bypass out...

Page 24: ...ss mode Interface Setting Parameter 2 Set the acceptable high frequency for bypass 50 Hz Setting range is from 51 0Hz to 54 0 Hz 60 Hz Setting range is from 61 0Hz to 64 0Hz The default value is 54 0H...

Page 25: ...ble disable Interface Setting Parameter 2 Enable or disable phase auto adapt function You may choose following two options DIS disable phase auto adapt function Then the UPS only can accept one condit...

Page 26: ...or example pressing OFF button in AC mode to turn into Bypass mode 16 Maximum battery discharge time setting Interface Setting Parameter 2 001 999 Set the maximum backup time from 1 min to 999 min UPS...

Page 27: ...enerated If the UPS is turned on it will transfer to battery mode When neutral is restored the alarm will NOT be muted automatically and the UPS will NOT go back to normal mode automatically Here you...

Page 28: ...ng the default value 0 Any modification should be suitable to battery specifications 23 L1 inverter voltage adjustment Interface Setting Parameter 2 The voltage range is from 9 9V to 9 9V the default...

Page 29: ...meter The calibration result will be effective by pressing Enter The calibration range is limited within 9V This function is normally used for parallel operation 28 L3 output voltage calibration Inter...

Page 30: ...able AC power to output The UPS will also charge the battery at AC mode ECO mode When the input voltage frequency is within acceptable range and ECO mode is enabled UPS will bypass voltage to output f...

Page 31: ...t start failure None 29 Battery fuse broken in Battery mode None 12 High inverter voltage None 36 Parallel output current unbalance None 13 Low inverter voltage None 41 Over temperature None 14 Invert...

Page 32: ...ode Warning event 01 Battery unconnected 10 L1 IP fuse broken 02 IP Neutral loss 11 L2 IP fuse broken 04 IP phase abnormal 12 L3 IP fuse broken 05 Bypass phase abnormal 21 Line situations are differen...

Page 33: ...ly by the electrical network via the Bypass Remove excess loads from UPS output After repetitive overloads the UPS is locked in the Bypass mode Connected devices are fed directly by the mains Remove e...

Page 34: ...the connection is ok and the alarm is still displaying please refer to the LCD setting section to enter the neutral loss check menu to see if the parameter3 is CHE if it is please press the Enter key...

Page 35: ...required precautionary measures may replace batteries and supervise operations Unauthorized persons must be kept well away from the batteries Verify that no voltage between the battery terminals and...

Page 36: ...ortion 2 100 Linear Load 5 100 Non linear Load Transfer Time Line Battery 0 ms Inverter Bypass 0 ms When phase lock fails 4ms interruption occurs from inverter to bypass Inverter ECO 10 ms EFFICIENCY...

Page 37: ......

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