INFOSEC M4T, User Manual

38 

INFOSEC UPS SYSTEM - 4, rue de la Rigotière - 44700 Orvault - FRANCE -  www.infosec-ups.com 

Hot Line – Tel + 33 (0)2 40 76 15 82 - Fax + 33 (0)2 40 94 29 51 - hotline@infosec.fr – 03 11 AA AA 201 18 

Screen 4.23

: This alarm appears when there is a (*) DSP Internal Error in the rectifier module, shutting down 

the rectifier immediately. There will be 3 more retries before the rectifier is blocked. 

Screen 4.24

: If when attempting to turn ON the rectifier a mains phase rotation error is detected and under 

these conditions an input phase rotation alarm appears shutting down the rectifier. 

Screen 4.25

: This alarm appears when any IGBT in the inverter side modifies the number of times 

programmed by display (200 by default). 

Screen 4.26

: When the inverter output is overloaded, depending on the level of this overload, the inverter will 

be shut down after a period of time according to the UPS overload curve and this alarm will appear. 

Screen 4.27

: When an external shutdown signal is enabled, the inverter will shut down displaying this 

message.  

Screen 4.28

: When the inverter is running and the maintenance bypass switch is turned ON the inverter shuts 

down immediately. 

Screen 4.29

: This alarm appears when, in a parallel system, a UPS goes into battery mode. The inverter will 

shut down. 

Screen 4.30

: This message indicates that a UPS is running over 160% of load in a parallel system. 

Screen 4.31

: When an over temperature is detected by the PFC or inverter temperature sensors, after 1 

minute the inverter will be turned off automatically. If the over temperature condition remains after another 

minute with the rectifier working, the rectifier is also blocked (alarm 4.60). 

Screen 4.32

: When the rectifier is overloaded, depending on the level of this overload, the inverter will be 

shut down after a period of time according to the rectifier overload curve and this alarm will appear. If this 

overload is still present with the inverter is switched off, the rectifier will be blocked after 30’’ and a blocking 
alarm 4.61 will appear.  

Screen 4.33

: This alarm appears when there is a (*) DSP Internal Error in the inverter module, shutting down 

the inverter immediately. There will be 4 retries before the inverter is blocked. 

Screen 4.34

: This alarm appears when an output short circuit is detected limiting the output RMS current up 

to the set value (150% of nominal current by default). The short circuit is detected when the output voltage 

phase to neutral is lower than 8% of nominal voltage. The system will retry twice to restart.   

Screen 4.35

: If there is a bypass phase rotation error when the inverter is running, the inverter will shut 

down. 

Screen 4.36

: This alarm appears when there is a (*) DSP Internal Error in the UPS module, shutting down the 

UPS immediately. There will be 2 retries before the UPS is blocked. 

Screen 4.37

: This alarm announces that in battery mode, the battery bank reaches 10.5V/bat. This is the end 

of backup time and the UPS is shut down.  

Screen 4.38

: The EPO (Emergency Power Off) switch is ON. The UPS and the static bypass are switched off 

and there is no AC voltage present at the output anymore. 

Screen 4.39

: This alarm appears after 3 times detecting output short-circuit. The UPS and the static bypass 

are then switched off and there is no AC voltage present at the output anymore. 

Screen 4.40

: This alarm appears when there is a (*) DSP Internal Error in the UPS module three times, 

shutting down the UPS. The UPS including the bypass is blocked, so no AC voltage is present at the output 

anymore. 

Screen 4.41

: This alarm appears when there is one of the following conditions: 

Positive DC bus voltage over 450V. 

Positive DC bus voltage less than 325V. 

Negative DC bus voltage over – 450V (absolute value). 

Negative DC bus voltage less than – 325V (absolute value). 

Screen 4.42

: This alarm appears when the UPS is blocked for any reason. This condition also blocks the 

rectifier.