Fault Code - Mennekes ACU Instructions D'installation

5.3 Fault code

For detailed error diagnosis, error codes are output in the
web interface.
1.Navigate to "Main Page > Setup > SCU setup> Settings".
 The corresponding error code is displayed in "Error code
A" or "Error code B".
There are two categories of error codes:
 Category A: Critical errors that cause the charging
process to be aborted.
 Category B: Less critical errors and explanations for
category A.
If you cannot rectify a fault, contact your local service
partner.
 See chapter "Service" on page 3.
If a software of the SCU needs to be updated, contact the
MENNEKES support at +49 (0) 2723 / 41-600.
Error diagnosis category A
Error code Description / notes on rectifying
errors
A 1 CPU clock divergence from target
value
 SCU runtime error.
1. Replace the SCU.
A 2 No communication between SCU and
RFID reader.
 Wrong RFID reader configured in
SCU setup.
 Software versions incompatible.
1. Update the SCU software. If
necessary, contact the MENNEKES
support.
 No cable coupling between socket
panel and SCU.
1. Check that the cables are connected
properly.
 RFID or SCU error.
1. Replace the socket panel or SCU.
32
32
Error code Description / notes on rectifying
errors
A 3 No CP communication.
 Communication error between the
SCU and CP controller.
1. Update the software of the SCU. If
necessary, contact the MENNEKES
support.
2. If the fault persists, replace the SCU.
A 4 No communication between the EHC
and SCU.
 No cable connection between the
EHC and SCU.
1. Check that the cable between the
EHC and SCU is correctly connected.
2. Check whether the meter has been
installed correctly.
3. Check whether the communication
head was mounted correctly beneath
the meter.
 Incorrect meter configuration.
1. Check the ACU settings (meter
protocol).
A 5 No communication between SCU and
ACU.
 No RS-485 bus connection between
ACU and SCU.
1. Restart the charging system and wait
two minutes.
2. Check that the RS-485 bus is
properly connected.
3. Check the connecting cables.
Replace damaged connection cables.