Mitsubishi Electric PUHZ-ZRP100VKA3 Service Manual page 106

OPERATING PROCEDURE
4. Disassembling the electrical parts box
(1) Disconnect all the connectors on the controller circuit board.
(2) Remove the 3 screws, screw 1, 2 and 3, that fix the
plate equipped with the outdoor controller circuit board,
and the electrical parts box, screw 1 from the front and the
screw 2 and 3 from the bottom of the electrical parts box.
(See Photo 6 and 7)
(3) Slide the plate in the direction of the arrow A and remove it.
(See Photo 6.)
(4) Remove the lead wires from the clamp on the bottom of the
electrical parts box. (See Photo 6)
(5) Remove the 3 screws, screw 4 and 5, that fix the bottom
side of the electrical parts box and remove the bottom side
plate by sliding in the direction of the arrow B.
(See Photo 8 and 9)
(6) Remove the 2 screws, screw 6 and 7, that fix the plate
equipped with the noise filter circuit board and converter
circuit board. (See Photo 10)
Note: When reassembling the electrical parts box, make
sure the wirings are correct.
Photo 7
Screw2
Heat sink
Photo 9
Noise filter
circuit board
(N.F.)
Converter
circuit board
(CONV.B)
Power circuit
board (P.B)
5. Removing the thermistor <2-Phase Pipe> (TH6)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Disconnect the connector TH7/6 (RED) on the controller
circuit board in the electrical parts box. (See Photo 4 or 5)
(4) Loosen the fastener for the lead wire in the electrical parts box.
[Removing the thermistor <2-phase pipe> (TH6) for V model]
(5) Remove the cont. box top fixing screws (4 on top/ 4 x 10)
to remove the cont. box top.
(6) Loosen the lead wire from the edge cover in the electrical
parts box.
(7) Loosen the clamp for the lead wire in the electrical parts box.
(8) Pull out the thermistor <2-phase pipe> (TH6) from
thermistor clip.
[Removing the thermistor <2-phase pipe> (TH6) for Y model]
(5) Loosen the clamp for the lead wire on the top of electrical parts box.
(6) Pull out the thermistor <2-phase pipe> (TH6) from thermistor clip.
Note: When replacing thermistor <2-phase pipe>
(TH6), replace it together with thermistor
<Ambient> (TH7) since they are combined
together. Refer to procedure No.6 on the next
page to remove the thermistor <Ambient> (TH7).
OCH645
Bottom plate of
electrical parts
box
Screw3
Electrical parts
box
B
Controller
circuit board
(C.B)
PHOTOS
Photo 6
A
Photo 8
Screw4
Bottom plate of electrical parts box
Photo 10
Screw6
Noise filter circuit board (N.F.)
Photo 11
Cont. box top
fixing screws
Cont. box top
Cont. box top
fixing screws
106
Noise filter circuit
board (N.F.)
Electrical
parts box
Screw1
Controller
circuit board
(C.B.)
Clamp
Screw
Electrical parts box
Screw7
Electrical parts box
Thermistor
<2-phase pipe> (TH6)