Mitsubishi Electric PUHZ-W50VHA Service Manual page 109

No.23 to 27 for PUHZ-W50VHA(-BS), PUHZ-W50VHAR1(-BS), PUHZ-W50VHAR2(-BS), PUHZ-W50VHAR3(-BS)
OPERATING PROCEDURE
23. Removing the controller circuit board (C.B.): Figure 3, Photo 17
(1) Remove all lead wire connectors on controller circuit board (C.B.).
CNF1, CNDC, CNAC, CN2, CN4, CN52C,
21S4, SV2, 63H, 63HS, LEV-A, LEV-B,
TH32, TH7/6, TH3, TH4, TH33
(2) Remove controller circuit board. (5 supports)
24. Removing the noise filter circuit board (N.F.): Figure 3, Photo 17
(1) Remove 2 screws for fixing the C.B. plate and detach the
C.B. plate from the electrical parts box.
(2) Remove E2, E3, CN5, LO, NO lead wire connectors from
noise filter circuit board (N.F.).
(3) Remove E1 lead wire connector from electrical parts box.
(4) Remove L, N lead wire connectors from terminal block (TB1).
(5) Remove CNAC1, CNAC2, E1, LI, NI lead wire connectors
from noise filter circuit board (N.F.)
(6) Remove noise filter circuit board. (9 supports)
25. Removing the power circuit board (P.B.): Figure 3, Photo 17
(1) Remove CN2, CN4, CNDC lead wire connectors from
controller circuit board (C.B.).
(2) Remove 2 screws for fixing the C.B. plate and detach the
C.B. plate from the electrical parts box.
(3) Remove CD9 lead wire connector.
(4) Remove all lead wire connectors on power circuit board (P.B.).
CN2, CN3, CN5, CN4
TABU, TABV ,TAVW, TABR, TABS
(5) Remove power circuit board from the electrical parts box.
26. Removing the reactor (ACL): Photo 18
(1) Remove the electrical parts box. (See Photo 4)
(2) Remove 3 reactor fixing screws (4 × 16) and remove the
reactor.
Note: The reactor is attached to the rear of the electrical parts box.
27. Removing the thermistor <HEAT SINK> (TH8)
(1) Remove CN2, CN4, CNDC lead wire connectors from
controller circuit board (C.B.).
(2) Remove 2 screws for fixing the C.B. plate and detach the
C.B. plate from the electrical parts box.
(3) Remove all lead wire connectors on power circuit board (P.B.).
(4) Remove power circuit board from the electrical parts box.
(5) Remove the thermistor <HEAT SINK> from the electrical
parts box. (1 screw (3 × 12))
OCH439M
PHOTOS/FIGURES
Figure 3
Photo 17
Photo 18
Reactor fi xing screw Reactor fi xing screw
Reactor fi xing screws
109
Power circuit board (P.B.)
Controller circuit board (P.B.) Controller circuit board (P.B.)
Noise fi lter
circuit board
Reactor (ACL) Reactor (ACL)
Electrical parts box Electrical parts box
C.B. plate
fi xing screw
Controller circuit
board
(C.B.)
C.B. plate
fi xing screw
Electrical parts
box fi xing screw
Reactor
(ACL)
Electrical parts box