Mitsubishi Electric PUHZ-ZRP100VKA3.UK Service Manual page 107

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 elec-
trical 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 bot-
tom side of the electrical parts box and remove the bot-
tom 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 electri-
cal 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).
OCH645D
Bottom plate of
electrical parts
box
Screw3
Electrical parts box
B
Controller
circuit board (C.B)
107
PHOTOS/FIGURES
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
Noise filter
circuit
board (N.F.)
Electrical
parts box
Screw1
Controller
circuit board
(C.B.)
Clamp
Screw5
Electrical parts box
Screw7
Electrical parts box
Thermistor
<2-phase pipe> (TH6)