System Type
Read the system type.
(Setting the system type will cause the unit to malfunction. The units are set-up at the factory and the system type can only be changed in conjunction with the appropriate hardware modifications)

When reading the 'System-Type' , one of the following equates will be returned:-
1 = Single Phase
2 = Three Phase three wire
3 = Three Phase four wire
4 = Single Phase three wire
In some models:-
5 = Three Phase three wire balanced
6 = Three Phase four wire balanced