Mennekes ACU Instructions D'installation page 69

Error code Description / notes on rectifying
errors
A 6 System monitoring indicates faulty
operating state:
Anticlockwise rotating field (LEDs flash in
reverse order)
 Phases are swapped.
1. Check the connection to the power
supply.
2. Correct the confused connections.
Phase failure (one or several LEDs are
off).
 Failure in the corresponding phase.
1. Check the phase according to the
circuit diagram.
2. Check that RCD and MCB are
switched on.
3. Check the supply cable.
Low voltage (one or several LEDs are
flashing)
 Voltage of corresponding phase too
low. If all LEDs are flashing, the
neutral conductor is probably
missing.
1. Check the power supply.
2. Connect the neutral conductor.
A 8 Error in flash data storage.
 Data storage fault.
1. Restart the charging system.
2. If the fault persists, replace the SCU.
Error code Description / notes on rectifying
errors
A 9 Load contactor on SCHUKO
socket does not switch off.
 Load contactor defective.
1. Replace the contactor for the
SCHUKO
 SCU defective.
1. Replace the SCU.
A 10 Load contactor the charging socket
type 2 will not deactivate.
 Load contactor defective.
1. Replace the contactor for the load
path type 2.
 SCU defective.
1. Replace the SCU.
A 11 No communication between SCU and
LED panel.
 Incorrect panel type selected.
1. Select the correct panel type.
 Incomplete update of LED panel.
1. Update the software for LED panel
and SCU. If necessary, contact the
MENNEKES support.
A 12 System language missing.
 Software update erroneous.
1. Perform a proper software update
for the SCU. If necessary, contact the
MENNEKES support.
 Hardware fault in connection with
error A: 8.
1. Replace SCU.
®
charging
® load path.
EN
33