Noise - Mitsubishi Electric PUHZ-W50VHA Service Manual

No.23~27 for PUHZ-W50VHA(-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 con-
troller 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 x 16) and remove the
reactor.
W The reactor is attached to the rear of the electrical parts box.
27. Removing the thermistor <HEATSINK> (TH8)
(1) Remove CN2, CN4, CNDC lead wire connectors from con-
troller 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 <HEATSINK> from the electrical
parts box. (1 screw (3 x 12))
PHOTOS & ILLUSTRATION
Figure 3
Photo 17
Photo 18
Reactor fixing screw
Reactor fixing screws
64
Power circuit board (P.B.)
Controller circuit board (P.B.)
Noise filter
circuit board
Reactor (ACL)
Electrical parts box
C.B. plate
fixing screw
Controller circuit
board
(C.B.)
C.B. plate
fixing screw
Electrical parts
box fixing screw
Reactor
(ACL)
Electrical parts box