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Check method of M-NET power circuit board
Normal
24–30 V DC?
Correct the short circuit point on
the M-NET transmission line.
24–30 V DC?
Is the incoming main voltage
208/230 V AC ±10%?
Check wiring.
Replace M-NET power circuit board.
Check breaker and incoming power supply.
Check power circuit board.
Check wiring.
Check the voltage between M1 and M2 on the
transmission terminal block TB3.
Disconnect the branch box - outdoor transmission wiring
from the terminal block TB3 , and check the voltage
between M1 and M2 on TB3 again.
*To check the voltage of the parts on this board with a tester is difficult due to its location.
Test points are limited.
No
Yes
(24–30 V DC )
No
Yes
(208–230 V AC )
No
Yes
(24–30 V DC )
M-NET power circuit board check
Power circuit board
1
3
CNAC1(WHT)
Multi controller circuit board
M1 M2
CNS1
(RED)
2 1
CN102
(WHT)
TB3
4 3 2 1
208/230 V AC
±10%
NI
LI
208/230 V AC
±10%
CN1
CN2
24–30 V DC
24–30 V DC (Non-polar)
To branch box
M-NET power circuit board
L2
L1
TB1
OCH573E
Содержание MXZ-4C36NAHZ
Страница 42: ... MXZ 4C36NAHZ U1 MXZ 5C42NAHZ U1 MXZ 8C48NAHZ U1 OCH573E ...
Страница 43: ... MXZ 8C48NA U1 OCH573E ...
Страница 44: ... MXZ 8C60NA U1 OCH573E ...
Страница 45: ... 6 2 BRANCH BOX PAC MKA50BC PAC MKA30BC 10ths DIGIT OCH573E ...
Страница 163: ... OCH573E ...