The LOW SET setting is limited by the HI SET
setting. The LOW SET limit cannot be greater than
the HI SET limit.
When setting the current, be aware that a maximum
of 200VA can be set for ACW and 50W for DCW,
respectively in terms of GPT-12XXX series.
As for GPT-15XXX series, a maximum of 500VA can
be set for ACW and 100W for DCW, respectively.
And for the specific GPT-15012, a maximum of
120W can be set for DCW.