# ~! n/ l4 O; z2 i$ k# f4 N. xWhen open a motor connection box, 4 Q# T" [: s9 Y6 p
Beside three phase wires for the power, 2 X9 P+ K& r3 w5 WWe have another two wires marked as P1 and P2; p8 b( ?3 {. G2 O4 y. K0 G& L& t
What is that for(P1, P2)?3 X8 d8 E3 p2 q! R* S% l6 m* E
Most of the time, they are not used.( f5 W: r* c5 H+ }, U: N% {% }, n4 U
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Thanks!
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Just for temperature monitoring!) Q! ~4 ?* M# V/ Y
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Good question! . M& G6 \" A; a9 P0 O- {5 s 4 D" C1 _8 {# x6 Q7 O1 }I think the two leads P1 and P2 are for the thermal switch (mostly normal close), use multimeter to check out.# X" @+ C' i5 ]0 w- W