Mitsubishi Electric PUHZ-W50VHA Service Manual page 108

No.17 to 22 for PUHZ-W85VHA(-BS) PUHZ-W85VHAR1(-BS)
OPERATING PROCEDURE
17. Removing the controller circuit board (C.B.): Figure 1
(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
(2) Remove controller circuit board from the C.B. base. (5
supports)
18. Removing the noise filter circuit board (N.F.): Figure 1, Photo 15
(1) Remove E2, CN5, LO, NO lead wire connectors from
noise filter circuit board (N.F.).
(2) Remove E1 lead wire connector from electrical parts box.
(3) Remove L, N lead wire connectors from terminal block (TB1).
(4) Remove 4 screws (4 × 10) for fixing the C.B. base and
detach the C.B. base from the electrical parts box.
(5) Remove CNAC1, CNAC2, E1, LI, NI lead wire connec-
tors from noise filter circuit board (N.F.).
(6) Remove noise filter circuit board from the C.B. base.
(11 supports)
19. Removing the power circuit board (P.B.): Figure 1, Photo 16
(1) Remove CN2, CN4, CNDC lead wire connectors from controller
circuit board (C.B.).
(2) Remove LO, NO, CN5 lead wire connectors from noise filter
circuit board (N.F.).
(3) Remove 4 screws (4 × 10) for fixing the C.B. base and detach
the C.B. base from the electrical parts box.
(4) Remove all lead wire connectors on power circuit board (P.B.).
CNAF, CN2, CN3, CN5, CN4, CNDC
TABU, TABV ,TAVW, TABT, TABS, TABP1, TABN1, TABN2
(5) Remove power circuit board from the electrical parts box.
(3 supports and 4 screws ( 2 screws (3 × 12) + 2 screws (4× 18)))
20. Removing the active filter module (ACTM): Figure 1, Photo 16
(1) Remove CN2, CN4, CNDC lead wire connectors from
controller circuit board (C.B.).
(2) Remove LO, NO, CN5 lead wire connectors from noise
filter circuit board (N.F.).
(3) Remove 4 screws (4 × 10) for fixing the C.B. base and
detach the C.B. base from the electrical parts box.
(4) Remove all lead wires on active filter module (ACTM).
L1, L2, P, Io, +, -, CNAF (4 wires)
(5) Remove the active filter module (ACTM) from the electri-
cal parts box. (2 screws (4 × 14))
21. Removing the reactor (DCL): Figure 1, Figure 2
(1) Remove 4 reactor fixing screws (4 × 10) to detach the
reactor (DCL).
(2) Disconnect L1, L2 lead wire from active filter module
(ACTM). Remove reactor wire from wire support.
22. Removing the thermistor <HEAT SINK> (TH8): Photo 16
(1) Remove CN2, CN4, CNDC lead wire connectors from
controller circuit board (C.B.).
(2) Remove LO, NO, CN5 lead wire connectors from noise
filter circuit board (N.F.).
(3) Remove 4 screws (4 × 10) for fixing the C.B. base and
detach the C.B. base from the electrical parts box.
(4) Remove all lead wire connectors on power circuit board (P.B.).
CNAF, CN2, CN3, CN5, CN4, CNDC
TABU, TABV, TAVW, TABT, TABS, TABP1, TABN1, TABN2
(5) Remove power circuit board from the electrical parts box. (3
supports and 4 screws (2 screws (3 × 12) + 2 screws (4 × 18)))
(6) Remove the thermistor <HEAT SINK> from the electrical
parts box. (1 screw (3 × 12))
OCH439M
PHOTOS/FIGURES
Figure 1
Electrical
parts box
Controller
circuit board
(C.B.)
Noise fi lter circuit board (N.F.) Noise fi lter circuit board (N.F.)
Photo 15
Photo 16
Active fi lter module (ACTM) Active fi lter module (ACTM)
Lead wire Lead wire
for HEAT SINK
thermistor
Terminal block
(TB1)
Figure 2
Reactor
(DCL)
Reactor
fi xing
screws
108
Active fi lter module (ACTM)
Power circuit board (P.B.) Power circuit board (P.B.)
Reactor (DCL)
C.B. base
Noise fi lter circuit
board (N.F.)
Power circuit board
(P.B) (P.B)
Wire support Wire support
Reactor Reactor
fi xing fi xing
screws screws