Note: Compatibility among the functions:
1. Once the grid voltage is lower than LVRT trigger voltage, i.e. when it is in
LVRT state, the following functions will be unavailable:
Anti-islanding, QU, PF(P), Q(P), PF Setting, reactive power setting, over
frequency derating, GFCI, Grid over frequency protection, Grid unbalance
protection, DCI protection.
2. Only one of the following four functions can be set as valid at one time: QU,
PF(P), PF Setting and reactive power setting.