AEG 1.04 Manuale Utente

 
 

44 

If error messages are displayed, please refer to the following 
table in order to localise the fault that has occurred and to find 
information about what measures to take to rectify the fault. If 
you cannot resolve the problem(s), please contact the Service 
Center (see page

 

5 "Hotline"). 

1. 

Check whether the UPS connection, and specifically the 
mains connection, has been made correctly. 

2. 

Check whether the input voltage has been applied correctly 
(check for phase(s) connected to the neutral conductor and for 
the phase sequence, if appropriate). 

3. 

Check the connection of the battery system (polarity and nominal 
voltage). 

4. 

Make a note of the status of the unit when the fault occurred 
(LC display) and the error code number that is displayed.  

 

PROBLEM POSSIBLE 

CAUSE  SOLUTION 

Overload in normal / bypass or battery 

operation 

Reduce the load. 

Applied mains not in tolerance range 

Check whether input cabling and UPS 

input voltage are normal. 

Error/fault LED lights up, periodic 

warning signals 

Battery system faulty / not connected 

Check whether the voltage of the battery 
system is correct and that the battery fuse-

switch disconnector is made. 

Error/fault LED lights up, 

continuous warning signal 

UPS fault 

Battery system aged/reached end of useful 

life 

Battery discharge time is 1/3 shorter 

compared to 1st

 

time 

Charging error 

Contact the Customer Service Center. 

LC display dark or

 

faulty 

LCD displays that data cable is not 

attached correctly (?) 

Make sure that the communication module 

has been installed correctly; check both 

plugs of the ribbon cable for the LC 

display are connected correctly.  

CompuWatch or SNMP(pro) do 

not detect the PROTECT 1.M >> 

No communication 

Software status of CompuWatch or 

firmware of SNMP(pro) card outmoded; 

error in computer configuration 

Download the latest software / 

firmware from the AEG homepage.  

Check the communication cable. 

The LC display does not display 

any inserted UPS modules 

Modules, housing or units are not 

connected correctly. 

Pull the module out and re-insert it into the 

slot (click!) or use a different slot. 

Mains power is connected but the 

UPS does not start operating. 

Mains not in tolerance; phase loss or 

possible phase sequence error; cover 

removed from bypass switch. 

Check the mains voltage and UPS 

connection; replace cover of bypass 

switch if removed.