Salicru UPS SLC TWIN PRO series, User Manual

37

SALICRU

8.2.2.  Troubleshooting guide. Fault 

indications.

Indication in the LCD

Possible cause

Solution

TWIN PRO4-10 kVA TWIN/3 PRO 8-20 kVA

Inverter Overload 

Fault

Inverter Overload 

Fault

Alarm code:42

Overload

Check the load and remove the non-critical ones

Check if any load is faulty or damaged

Bypass Overload 

Fault

Byp Overload Fault

Alarm code:43

Overload

Check the load and remove the non-critical ones

Check if any load is faulty or damaged

Output Short Circuit

Output Short Circuit

Alarm code:31

Output shortcircuit

Disconnect all the loads. Shutdown the UPS. Check if the UPS output 

and loads are on short-circuit. Make sure that the short-circuit has 

been removed before starting up the UPS and loads

Heatsink Over 

Temperature Fault

-

The temperature inside the equipment is 

too high

Check the UPS cooling and the ambient temperature of the room

-

Heatsink Over 

Temperature Fault

Alarm code:81

The temperature inside the equipment is 

too high

Make sure that the UPS is not overloaded, cooling holes are not 

blocked and the ambient temperature is not too high.

Shutdown the equipment and leave it at rest for 10 minutes as 

minimum to decrease the temperature before starting it up again. If the 

fault happens again, contact with the S.T.S.

Bus Over Voltage

Bus Over Voltage

Alarm code:21

UPS internal fault

Consult with the S.T.S.

Bus Under Voltage

Bus Under Voltage

Alarm code:22

UPS internal fault

Consult with the S.T.S.

Bus Unbalance

Bus Unbalance

Alarm code:23

UPS internal fault

Consult with the S.T.S.

Bus short

Bus short

Alarm code:24

UPS internal fault

Consult with the S.T.S.

Bus Softstart Failed

Bus Softstart Fail

Alarm code:25

UPS internal fault

Consult with the S.T.S.

Inverter Over Voltage Inv Over Voltage

Alarm code:32

UPS internal fault

Consult with the S.T.S.

Inverter Under 

Voltage

Inv Under Voltage

Alarm code:33

UPS internal fault

Consult with the S.T.S.

Inverter Softstart 

Failed

Inv Softstart Fail

Alarm code:E34

UPS internal fault

Consult with the S.T.S.

Negative Power Fault Negative Power Fault 

Alarm code:E1

Load is completely inductive or capacitive

Shutdown some non-critical loads.

The inrush current of the loads is done through the Bypass. Make sure 

that there is not an overload and proceed with the start up of the UPS

Fatal EEPROM Fault

-

UPS internal fault

Consult with the S.T.S.

Cable male and 

female disconnected 

fault

Cable male and 

female Loss fault

Alarm code:E2

Parallel bus cable is disconnected

Check the parallel bus cable

-

Backfeeder

Alarm code:93

UPS internal fault

Do not touch the terminals of the equipment, which is connected 

to an electrical installation with a UPS. Even without the electrical 

power supply is very dangerous, because the equipment is an energy 

generator. Consult with the S.T.S.

Table 11. 

Troubleshooting guide. Fault indications.

8.2.3.  Troubleshooting guide. Other 

circumstances.

Problem

Possible cause

Solution

No indications and no warning alarms, 

although the UPS is connected in the 

electrical mains

There is not input voltage

Check the building wiring and UPS power cord. Check  UPS input 

switch and protection panel are turned "On"

BYPASS led lights although there is power 

supply

The inverter doesn't start up

Press over the start up key   for more than 1 second, the acoustic 

alarm will beep for 1 sec. and the UPS is turned "On"

BATTERY led lights and the acoustic alarm is 

triggered (1 beep every 4 sec.)

Input voltage and/or frequency out of range

Check the power supply. Check wiring of the building and the power 

supply cable of the UPS. Make sure that the UPS input switch and the 

protection panel are turned "On"

Back up time is shorter than the nominal

Batteries are not fully charged

Faulty batteries

Charge the batteries for 12 hours and check the capacity

Table 12. 

Troubleshooting guide. Other circumstances.