Operating instructions
Protect 5.31/xxx-480-220-120 10 kVA - 120 kVA
Page 50 of 56 8000020680 BAL, en
12.2.1 Fault Table
Faults that occur are displayed on the DOU in plain text. Some faults can be
located and eliminated quickly using the following table.
Fault Possible cause Remedy
Q1 triggered.
REC does not work.
Earth fault or short circuit
on the battery side.
Q1 not in "ON" position.
F20 to F22 defective
F31 to F33 defective.
Repair the system (renew
defective fuse) and restart it as
described in Chapter 7.
If Q1 triggers again, contact the
AEG service department.
Switch on Q1.
Replace the faulty fuses.
Replace the faulty fuses.
SBS does not work. Fault in the SBS circuit.
F13 to F16 faulty.
Check the SBS circuit.
Replace the faulty fuses.
INV does not work. INV is not switched on.
F26 and F27 faulty and/or
F17 to F18 faulty.
No supply to INV
Battery voltage is outside
the tolerance range.
Switch on the INV with S1 on
DOU.
Replace the faulty fuses.
Check whether Q1 is in the "ON"
position.
Check voltage at X2.
No load voltage. Load fuse faulty. Measure output voltage at X3.
Check external load fuses.
Faulty connection to
battery.
Battery isolator (external)
in the "OFF" position.
F24 to F25 faulty.
Switch on battery isolator
(external) (refer to start-up), renew
defective fuses.
Fan does not work. Fan fuse faulty.
Loose contact in the plug
connection.
Fan faulty.
Renew the respective fuse in acc.
with Chapter 8.
Unlock and relock the respective
fan connector on top of the
cabinet several times.
Renew the fan in accordance with
chapter 12.
UPS overload. Load consumption too
high. System automatically
switches over to the SBS
circuit after one minute.
Reduce the load.
Table 9 Fault table
i
NOTE:
If the rectifier is faulty and the inverter is switched off, the battery
continues to be discharged by the internal power supply for the
REC and INV section which is connected to DC voltage
(approx. 50 W). The battery must be disconnected by opening the
battery isolator to prevent it from becoming fully discharged
(exhaustive discharge).