Delta AC MAX Installation And Operation Manual page 13

2.2.4.2 Authorization mode
Choose the pin 2 to configure the authorization mode for Bluetooth availability.
Configuration
If the pin 2 is set to OFF (left), the key switch has to be turned ON to start a charging session. The Bluetooth
authentication is deactivated in this configuration but the app can still connect and be used to configure,
monitor and update the wallbox.
If the pin 2 is set to ON (right), the charging session can only be started from the Delta AC MAX App. The key
switch authentication is deactivated in this configuration.
2.2.4.3 Grounding system
Choose the pin 3 to configure the grounding system for TT/TN or IT system.
Configuration
If the pin 3 is set to OFF, the wallbox is configured for TN/TT grids. In this configuration, the wallbox
continuously monitors the availability of the protective earth conductor. If the impedance of this measurement
is too high, the wallbox will indicate the problem by the status LED.
If the pin 3 is set to ON, the wallbox is configured for IT grids. In this configuration, the wallbox monitors that
no protective earth conductor is connected. If the wallbox recognizes the availability of the protective earth
conductor, it will indicate the problem by the status LED.
Function
Key switch (Default)
Function
TT/TN (Default)
13
Configuration
Configuration
v1.0.3
Function
Bluetooth
Function
IT