Power Up And Start Up - WEG CFW11 Applications Manual

Power up and Start up

6 POWER UP AND START UP
Shown below is a step-by-step guide for the commissioning of a water pumping photovoltaic system using a
WEG CFW11 frequency inverter:
1. Verify that the connections of power, ground, and control are correct and secure;
2. Measure the voltage from the solar modules, and check that it is within the allowed range;
3. Mechanically disengage the load motor. If the engine cannot be uncoupled, make sure that turning in
either direction (clockwise or counter-clockwise) will not cause damage to the machine or risk of
accidents;
4. Energize input;
5. Enter the general parameters in the CFW11 (Quick Parameter Reference, pag. 6), report according to
the technical characteristics of the water pump and the inverter;
6. Switch to remote mode, and restart the CFW11;
7. If using a solar detector, adjust the values according to irradiation percentage to start the system
(P1028) and percentage to stop the system (P1017). If not using a solar detector, check if the time
between starts (P1027) is suitable for your application.
8. With the system running, configure the Proportional (P1024) and Integral (P1025) gains of the
controller, can be done by the HMI, or WLP;
9. In steady state (after acceleration), if the MPPT tracking is too slow, the MPPT increment rate can be
gradually increased through (P1019) via HMI;
10. If the system is being turned off with passing clouds or an added load into the pump, adjust the level
to enable the cloud/load effect controller (P1038) and the controller gain (P1039), gradually increase
the controller gain to a faster response.
NOTE!
The inverter performs some routines related to loading or downloading data (parameter settings
and/or SoftPLC). After these routines, if there is no problem, the display will show the monitoring
mode
Solar Pump Drive | 33