Delixi CDI-SPD Series, Manual

Page: 29 / 33

Chapter V Functional Parameters Table
Page 26
F28.02: Operation Mode
0. In MPPT mode, the frequency inverter turns power down and frequency
reduction function; its final voltage upon start tracks from 80% open-circuit voltage,
and the efficiency is above 98%. When luminous energy is adequate and table, the
output frequency fluctuates within 1 Hz. In non-MPPT mode, any other parameters
can be modified. To start in this mode, for a steady operation, the output frequency
can be fixed at 35 Hz, and then raise frequency when the energy becomes steady.
Alternatively, keep steady voltage mod from the beginning and fix bus voltage at
about 270 V and let the frequency rise slowly. The minimum tracking voltage of
MPPT must be higher than under-voltage failure 10 V;
1. In CVT mode, there is only PV panel input, It requires testing the bus voltage
before starting and regarding 80% open-circuit voltage as the stabilized voltage
directly.
2. Internal debugging mode
3. In the mode of universal frequency inverter, turn off the PV MPPT function
and use the frequency inverter as a universal one. The frequency inverter operates in
VF mode.