Mitsubishi Electric PUHZ-W85VHA Service Manual page 43

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 x 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 connectors
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 con-
troller circuit board (C.B.).
(2) Remove LO, NO, CN5 lead wire connectors from noise fil-
ter circuit board (N.F.).
(3) Remove 4 screws (4 x 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 x 12) + 2 screws (4
x 18))
20. Removing the active filter module (ACTM): Figure 1, Photo 16
(1) Remove CN2, CN4, CNDC lead wire connectors from con-
troller circuit board (C.B.).
(2) Remove LO, NO, CN5 lead wire connectors from noise fil-
ter circuit board (N.F.).
(3) Remove 4 screws (4 x 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 electrical
parts box. (2 screws (4 x 14))
21. Removing the reactor (DCL): Figure 1, Figure 2
(1) Remove 4 reactor fixing screws (4 x 10) to detach the reac-
tor (DCL).
(2) Disconnect L1, L2 lead wire from active filter module
(ACTM). Remove reactor wire from wire support.
22. Removing the thermistor <HEATSINK> (TH8): Photo 16
(1) Remove CN2, CN4, CNDC lead wire connectors from con-
troller circuit board (C.B.).
(2) Remove LO, NO, CN5 lead wire connectors from noise fil-
ter circuit board (N.F.).
(3) Remove 4 screws (4 x 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 x 12) + 2 screws (4 x 18))
(6) Remove the thermistor <HEATSINK> from the electrical
parts box. (1 screw (3 x 12))
PHOTOS & ILLUSTRATION
Figure 1
Electrical
parts box
Controller
circuit board
(C.B.)
Photo 15
Photo 16
Active filter module (ACTM)
Lead wire
for heatsink
thermistor
Terminal block
(TB1)
Figure 2
Reactor
fixing
screws
43
Active filter module (ACTM)
Power circuit board (P.B.)
Reactor (DCL)
C.B. base
Noise filter circuit
board (N.F.)
Noise filter circuit board (N.F.)
Power circuit board
(P.B)
Wire support
Reactor
(DCL)
Reactor
fixing
screws