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Home / Configurazione tecnica / Charging Station Diagnostics & Maintenance / Manufacturer error codes / Smappee error codes

Smappee error codes

Aggiornato il 28 ottobre 2026
Questo articolo non è ancora disponibile in Italiano. Viene mostrata la versione in English.
ocppdiagnosticssmappeeerror codes

This page covers the Smappee EV Base, EV Base Charger, EV Wall Business, fourth-generation EV Wall and Smappee DC charging stations. It explains the codes sent to the supervision, the codes shown by the EV Wall V4 and the LEDs.

Where to read the code: in Chargekeeper, charging station list, connector details, Information column (or the active sessions list, Information column). It shows "OCPP code - vendor code - information". See Manufacturer error codes.

How Smappee reports errors

Smappee charging stations do not speak OCPP themselves: the OCPP connection goes through the Smappee cloud, which relays the station state to Chargekeeper.

Faults arrive in the vendor code (vendorErrorCode), as SMP_AC_xxxx for AC stations and SMP_DC_xxxx for DC stations, for example SMP_AC_0100.

On the EV Base and EV Wall Business, the station has no display: every fault shows as the same steady red LED. The vendor code is therefore the only place where the cause can be read.

Smappee's documentation does not say which OCPP error code comes with each SMP_ code. The "OCPP code" column gives the one received from stations supervised by Chargekeeper, when it has been recorded.

AC stations (EV Base, EV Base Charger, EV Wall Business, EV Wall V4) — codes sent to the supervision

Code Meaning What to do OCPP code
SMP_AC_0001 Unacceptable leakage current detected by the residual current monitor Have the station wiring checked by a qualified electrician; contact Smappee support if the fault persists —
SMP_AC_0002 Fault on the positive side of the Control Pilot signal Contact Smappee support (support@smappee.com) —
SMP_AC_0003 Fault on the Proximity Pilot signal Contact Smappee support (support@smappee.com) —
SMP_AC_0004 Measured temperature outside the allowed range (too hot or too cold) Make sure ambient conditions stay within the specified operating range (for example, shade from direct sun) —
SMP_AC_0005 Station disabled by an external command Re-enable the station from the Smappee Dashboard —
SMP_AC_0006 The socket could not lock the charging cable Re-insert the cable fully; check that nothing blocks the lock —
SMP_AC_0007 Fault on the negative side of the Control Pilot signal Contact Smappee support (support@smappee.com) —
SMP_AC_0100 The station lost its internet connection Check the site's internet connection; check the Smappee Connect LED (see below) WeakSignal
SMP_AC_0101 The station detected a faulty energy meter Check the meter; contact Smappee support —

Smappee DC stations — codes sent to the supervision

Codes SMP_DC_0003, SMP_DC_0004 and SMP_DC_0008 are warnings.

Code Meaning What to do OCPP code
SMP_DC_0001 Charging cable temperature too high Check ambient conditions; check that the charging cable is not damaged —
SMP_DC_0002 Power inverter temperature too high Check ambient conditions; check that air inlets and outlets are clear and filters are clean —
SMP_DC_0003 Warning: cable temperature rising, power is reduced automatically No action: the power reduction limits the temperature rise —
SMP_DC_0004 Warning: inverter temperature rising, power is reduced automatically No action: the power reduction limits the temperature rise —
SMP_DC_0005 The emergency stop button has been pressed If the state persists, release the emergency stop button on site —
SMP_DC_0006 The insulation monitor tripped: insulation too low on the DC side Have all DC wiring checked by a qualified technician —
SMP_DC_0007 The vehicle reported an error Contact Smappee support for details —
SMP_DC_0008 Warning: one or more power inverters are offline Have the inverter wiring checked; note the error codes shown on the inverters —
SMP_DC_0009 No communication with the station's communication board Have the internal wiring checked; contact Smappee support —
SMP_DC_0010 Overvoltage detected Contact Smappee support —
SMP_DC_0100 The station lost its internet connection Check the site's internet connection WeakSignal
SMP_DC_0101 The station detected a faulty energy meter Check the meter; contact Smappee support —
SMP_DC_0103 Vehicle authentication timed out Unplug the cable and start again —

Other models: EV Wall V4 — codes shown on the display

These codes are shown on the display of the fourth-generation EV Wall (EVW4-332-…). The documentation does not say whether they are also sent over OCPP, nor which SMP_AC_ code they match.

Code Meaning What to do OCPP code
E01 Cannot reach a time server (NTP) Check the network connection and the firewall (port 123) —
E02 No IP address obtained from the network Check the network connection, DHCP and the firewall —
E03 No connection with the Smappee cloud Check the network connection and the firewall —
E10 Residual current monitor error; the running session is stopped Unplug and check the cable and connector for damage; try another cable or vehicle; call a qualified installer if the fault persists —
E20 Negative voltage detected on the Control Pilot line Unplug and check the cable and connector; try another cable or vehicle; call a qualified installer if the fault persists —
E21 Control Pilot voltage too high Unplug and check the cable and connector; try another cable or vehicle; call a qualified installer if the fault persists —
E22 The vehicle signalled a fault (Control Pilot state E); charging is stopped for safety Unplug the vehicle and check the error messages on its dashboard —
E30 Invalid voltage on the Proximity Pilot line Unplug and check the cable and connector; try another cable or vehicle; call a qualified installer if the fault persists —
E40 RFID reader not detected or not responding Call a qualified installer or service technician if the fault persists —
E41 MID meter not detected or not responding Call a qualified installer or service technician if the fault persists —
E50 The charging connector could not be locked; charging is disabled Re-insert the connector firmly; try another cable —

LEDs and display

Station LED

On the EV Base, each charging point has its own LED and can show a different state. Faults are not differentiated: they all show as steady red. The EV Wall V4, EV One V4 and EV Dual show their status as text on a display.

Signal Meaning What to do
Steady red Charging point unavailable: fault, station disabled or not activated yet Check in the app or the Smappee Dashboard whether the station is disabled, and re-enable it; read the vendor code (SMP_AC_xxxx) to find the cause; on the EV Base, check that both sides are powered (circuit breakers and RCD on); contact the installer or Smappee support if the LED stays red
Flashing red RFID badge refused during authorisation Check the badge authorisation in the supervision; the driver should contact their card supplier
Steady white Charging point available No action: the driver can plug in
Steady blue Vehicle plugged in, session not yet authorised Present the RFID badge, scan the QR code or use the Pay Station; if no authorisation is required, the LED should turn green within about 3 seconds: if it stays blue, check the station configuration
Flashing blue RFID badge authorisation in progress Wait up to about 15 seconds: the LED turns red (refused or not started) or green (started)
Pulsing green Vehicle charging No action
Flashing green Session waiting or paused by Smappee (overload protection, smart charging) No action, information only; if frequent, check the grid maximum current setting and the site measurements
Steady green The station allows current but the vehicle is not drawing it: charge complete, stopped by the vehicle or session paused Check the session status in the app or the Smappee Dashboard (paused or charging ended); if charging ended while the battery is not full, check the vehicle's charge settings or errors
Steady or pulsing green alternating, with clicking The session keeps starting and stopping Have the installer check and reset the internal RCD, and call them back if it trips again; have a qualified electrician check the wiring, the phase-neutral and neutral-earth voltages and the earth resistance
Off The station has no power Check the station's circuit breaker; have the installer check the internal RCD, and call them back if it trips again

Smappee Connect LED

The Smappee Connect is the internet gateway mounted inside the station; its LED is only visible with the station open (installer). Because OCPP goes through the Smappee cloud, a Connect without internet also makes the station offline for the supervision.

Signal Meaning What to do
Flashing red The Connect has no internet access: the station is offline for the cloud and for the supervision Check the network cable, the switch port and internet access; check the firewall rules; contact Smappee support if the problem persists
Steady green The Connect is on the local network but has not reached the Smappee servers yet Wait up to 2 minutes; then check the firewall and contact support
Steady blue The Connect is booting If it lasts longer than about 30 seconds, contact support
Flashing blue The Connect is in install mode, waiting to be connected to the network (with Ethernet: no cable detected or Ethernet mode not enabled) Complete the activation in the Smappee app; for Ethernet, enable Ethernet mode in the app and check the cable
Breathing green The Connect is working normally No action

Smappee 4G Connect LED

On the 4G Connect, the LED shows 4G reception, not the cloud status: red means a weak or missing 4G signal.

Signal Meaning What to do
Flashing red No 4G reception or no internet access Check the SIM card status and 4G coverage; move the 4G Connect or switch to a wired connection; contact support if the problem persists
Breathing red Poor 4G reception at the installation position Move the 4G Connect to a better spot or use another connection method
Breathing yellow Average 4G reception; some functions may be slow Consider moving the 4G Connect
Flashing cyan The 4G Connect is searching for a network Wait; if it persists, check the SIM card status and coverage

Sources

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