Check the three status LEDs on the LMC (see LMC Indicator LED Light) and the device status in the VOOL app or Portal first. If you need to de-energise the LMC, switch off the power supply and wait at least 30 seconds before continuing. If the steps below do not solve the issue, contact [email protected].
No LEDs light up
Switch off the LMC with its circuit breaker in the distribution board.
Switch the circuit breaker back on.
Check that the AC power supply wires are connected correctly.
Make sure the main power in the switchboard is switched on.
No network connection – the LMC does not come online in the app or Portal
Wait a few minutes after connecting to the internet for the device to appear online.
After setting up Wi-Fi, check in the app that the LMC is connected to Wi-Fi. If not, check the Wi-Fi password.
Check that the Ethernet cable is connected and has internet access – the RJ45 port LEDs light up when the connection is active.
If the Wi-Fi signal is weak, connect the antenna supplied with the LMC or install an external antenna outside the cabinet. Restart the LMC after connecting the antenna.
Make sure the network settings allow devices to connect to the internet.
Connect your phone or computer to the same network to check that the internet connection works.
LTE version: the LMC does not come online via LTE
Check in the VOOL Portal that LTE has been activated for this LMC. Activation can take up to 15 minutes.
Make sure the LTE antenna is screwed onto the LTE connector (not the Wi-Fi connector) and mounted outside the metal cabinet.
Check the mobile coverage at the site with a phone. In garages and basements the signal can be too weak – move the antenna or use a longer antenna cable.
Power-cycle the LMC and wait up to 15 minutes.
If LTE is activated and the signal is good but the LMC still does not come online, contact [email protected] so we can check the eSIM.
The LMC cannot be added to the site / does not appear in the Portal
Make sure the serial number and PIN are entered correctly.
Make sure the LMC has an internet connection.
Make sure the LMC has not been added to another site.
A charger is not communicating with the LMC
Restart the LMC and the charger from the app and run autoconfiguration.
CAN connection: check that the RJ45 port LEDs on the charger are lit. If not, check the CAN cable plugs and that the last charger on the line has an end resistor.
LAN connection: check that the RJ45 port LEDs on the charger and the LMC are lit. If not, check the Ethernet cable plugs.
Make sure the charger and the LMC are in the same local network and that the network allows devices to communicate over LAN.
If a charger was replaced, added or reset, add it to the LMC group again.
LMC and charger phases don't match
Check that the LMC current transformers are on the correct wires (L1, L2, L3).
Check that the charger supply cable wires are in the right order.
The LMC is not measuring current
Check that the current transformer connector is plugged securely into the LMC.
Check that there is consumption in the building.
If the current transformers were clamped onto the cables while the connector was not plugged into the LMC, they may be damaged – contact [email protected].
The LMC keeps losing its internet connection
Make sure the internet connection is strong and stable. On Wi-Fi the signal strength should be above 30 %.
Connect the supplied antenna; in a metal cabinet mount an external antenna outside the cabinet (available from your wholesaler).
LTE version: check the LTE signal strength in the VOOL Portal and move the LTE antenna if needed.
Improve the Wi-Fi signal with a Wi-Fi extender or by moving the router.
Where possible, use an Ethernet cable.
Load management keeps working while the LMC is offline – only the online visibility in the app and Portal is lost.
Charging does not start – ripple control
When the ripple-control input (DI1, pin 5) is connected to GND, the LMC pauses all connected chargers. Check the relay wiring and the ripple-control signal; charging resumes when the input is released.
LMC does not open the Wi-Fi setup hotspot (LMCs manufactured before 2025)
Make sure the LMC is not already connected via Wi-Fi, Ethernet or LTE – the hotspot only opens when the LMC has no internet access.
Restart the LMC and wait about 2 minutes.
LMCs manufactured from 2025 are set up via Bluetooth in the VOOL mobile app instead: press the LMC button for at least 1 second.