Mitsubishi Electric PUHZ-P200YKA3 Service Manual page 97

OPERATING PROCEDURE
4. Disassembling the electrical parts box
(1) Disconnect all the connectors on the controller circuit board.
(2) To remove the controller circuit board, release it from the support.
(3) Remove cont. base fixing screws (2 for front/ 4 x 10). (Photo 5)
(The cont. base is fixed to the cont. base piece with a
hook on the left side.)
(4) D isconnect all the connectors on the noise filter circuit
board. (Photo 6)
(5) T o remove the noise filter circuit board, release it from the support.
(6) Remove N.F. base fixing screws (2 for front/ 4 x 10). (Photo 7)
(7) D isconnect all the connectors on the power circuit board.
(8) T o remove the power circuit board, remove power board
fixing screws (4 for front/ 4 x 12), then release the board
from the support. (Photo 8)
(9) T he reactor is attached to the rear side of the electrical
parts box. (Photo 9)
(To remove the reactor, the electrical parts box must be
separated from the outdoor unit.)
Note: When reassembling the electrical parts box, make
sure the wirings are correct.
Photo 6
Photo 8
Screws
5. Removing the thermistor <2-Phase Pipe> (TH6)
(1) R emove the service panel. (See Photo 1)
(2) R emove the top panel. (See Photo 1)
(3) D isconnect the connector TH7/6 (RED) on the controller
circuit board in the electrical parts box. (See Photo 4)
(4) L oosen the fastener for the lead wire in the electrical
parts box.
(5) L oosen the clamp for the lead wire on the top of electri-
cal parts box.
(6) P ull out the thermistor <2-phase pipe> (TH6) from ther-
mistor clip.
Note: When replacing thermistor <2-phase pipe> (TH6),
replace it together with thermistor <Ambient> (TH7)
since they are combined together. Refer to proce-
dure No.6 on the next page to remove the thermis-
tor <Ambient> (TH7).
OCH679
Photo 5
Screw
Photo 7
Noise filter
circuit board
(N.F.)
Screw
Screws
Photo 9
Screws
Power circuit
board (P.B)
Photo 10
Cont. box top
97
PHOTOS/FIGURES
Controller
Cont. base
circuit board (C.B.)
Noise filter base
Electrical parts box
Thermistor
<2-phase pipe>
(TH6)
Screw
Screw
Reactor
Screws