Mitsubishi Electric City Multi PUMY-SP112VKM Technical & Service Manual page 138

OPERATING PROCEDURE
4. Disassembling the electrical parts box (VKM type)
(1) Disconnect all the connectors on the multi controller circuit board.
(2) Remove 2 screws 1 which fix the plate holding the multi controller
circuit board and the electrical parts box. (See Photo 5)
(3) Remove the multi controller circuit board. (See Photo 5)
(4) Disconnect the M-NET power board connector on the
back plate of the controller circuit board.
(5) Disconnect the connectors of reactor on the back plate
of the electrical parts box. (See Photo 6)
(6) Remove 2 screws 2 on the back plate of the electrical
parts box. (See Photo 6)
(7) Remove the 3 reactors. (See Photo 6)
Note 1: When reassembling the electrical parts box,
make sure that the wirings are correct.
Note 2: When exchanging the reactor, make sure to
exchange all the 3 reactors.
5. Disassembling the electrical parts box (YKM type)
(1) Disconnect all the connectors on the multi controller circuit board.
(2) Remove 2 screws 1 which fix the plate holding the multi
controller circuit board and the electrical parts box.
(3) Remove the multi controller circuit board. (See Photo 7.)
(4) Disconnect the M-NET power board connector on the
back plate of the controller circuit board.
(5) Disconnect all the connectors on the noise filter circuit
board. (See Photo 8)
(6) Remove 9 supports on the noise filter circuit board. (See Photo 8)
(7) Remove the noise filter circuit board. (See Photo 8)
(8) Remove the noise filter plate fixing screws. (See Photo 8)
(9) D isconnect the connectors of reactor on the bottom
plate of the electrical parts box. (See Photo 9)
(10) R emove 4 screws 2 on the bottom plate of the
electrical parts box. (See Photo 9)
(11) R emove the reactor. (See Photo 9)
Note : When reassembling the electrical parts box,
make sure that the wirings are correct.
Photo 7
M-NET power board*
(M-NET P.B.)
Multi controller circuit
board (MULTI.B.)
Terminal Terminal
block (TB1) block (TB1B)
* The M-NET power board is installed behind the multi controller circuit board.
OCH668B
Electrical parts box
Screw
Noise filter circuit
board (N.F.)
Terminal
Terminal
block (TB7)
block (TB3)
PHOTOS/FIGURES
Multi controller circuit
Photo 5
board (MULTI.B.)
Power circuit
board* 2 (P.B)
Terminal
block (TB1)
Screws2
Photo 6
1
* The M-NET power board is installed behind the multi controller circuit board.
Power circuit board
Photo 8
(P.B)
Noise filter
circuit board
(N.F.)
1
Supports
Photo 9
Screws2
138
M-NET power board*
Reactor
Connectors
of Reactor
Connector of
Reactor
Reactor
Connectors
of Reactor
Connectors
of Reactor
Reactor
Electrical parts box
Noise filter plate
fixing screws
Electrical
Reactor
parts box
Connectors
of Reactor
1
(M-NET P.B.)
Electrical
parts box
Screws
1
Terminal
block (TB3)
Terminal
block (TB7)
Electrical
parts box
Supports
Supports