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3.4. Installation: Troubleshooting
3.4.1. Verifying charger functionality:
At power on, the charger has default settings and configuration, which allow it to
work as a basic charger in the offline state. It is possible to verify its basic functionality by
plugging in an EV and observing that the charger starts a charging session. The web client main
page can be used to verify that the charger is properly measuring electrical values and is online
and connected to an OCPP backend.
3.4.2. Common issues during commissioning:
1. No sound or light indication at power-on: the charger is designed to always beep
and light its RGB strip at power on, to indicate that all components of the device are functional.
The most common cause of missing indication is that there is a bad connection along the circuit
and the SCARAB’s power terminals are not receiving mains voltage. Verify that the circuit is
properly connected and that the “L” (L1) terminal is receiving 230VAC nominal from the phase
conductor for single-phase devices and that all phases are properly connected for three-phase
devices. Check that mains supply parameters are adequate regarding RMS voltage, voltage
fluctuations, spikes and noise.
2. The LED ring lights up red/blinking red: The charger is indicating a fault. This
means that all components of the device are functional, but there is an issue that prevents the
overall device from proper operation.
a. The most common hardware cause of faults when commissioning is a phase
reversal. The charger is incorrectly connected to mains and the neutral, live, or earth
conductors are switched. Verify that the charger is correctly wired to the grid.
b. Another common case is overvoltage due to incorrect supply wiring. In single-
phase units on 3-phase installations, verify that the device is not across two phases of the grid,
but between a phase and neutral. Verify that there are no excessive voltages present on the
power line. Check the circuit voltage drop to verify that the voltage is within nominal range.
c. Verify that the charger is correctly set up for the respective mains and earthing
system (number of phases, phase order, etc.). If RS-485 peripherals are used, check their
connection and configuration. For socket-type devices, check that the plug is fully inserted and
that there is no debris preventing the locker form operating.
d. Any specific fault can be identified and reset via the web client’s main and
diagnostics pages. Note that clearing a fault without removing the underlying problem will
result in the charger to enter the same fault state after the reset.
e. Software errors may be cleared by a power-cycle (hard reset) of the device.
Disconnect it from power and after a short period, power it on again. Note that this does not
work on every fault and is reserved as a simple troubleshooting step.
3. Connectivity problems may arise due to improper network setup. Ensure that the
chosen network interfaces are correctly configured.
For cellular connections, check that the SIM card is correctly installed and the APN is
configured. For WiFi connections, verify that the correct access point is selected and its SSID
and PSK credentials are correctly entered and that the wireless network is not behind a proxy.
For wired Ethernet connections, check the pinout and connection of the cable and verify that
the network switch has direct access to the internet since proxy authentication is not supported.
If the LAN network is configured through a proxy, an exception for the chargers IP or MAC
address can be configured in the network's settings. The MAC/IP can be found via the web
client installer's mobile app.
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