Mitsubishi Electric PUHZ-ZRP100VKA3.UK Service Manual page 114

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) Disconnect all the connectors on the noise filter circuit
board. (Photo 6)
(5) To 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) Disconnect all the connectors on the power circuit board.
(8) To 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) The 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) 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)
(4) Loosen the fastener for the lead wire in the electrical
parts box.
(5) Loosen the clamp for the lead wire on the top of electri-
cal parts box.
(6) Pull 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).
OCH645D
Photo 5
Screw
Photo 7
Noise filter
circuit board
(N.F.)
Screws
Photo 9
Power circuit
board (P.B)
Photo 10
Cont. box top
114
PHOTOS/FIGURES
Cont base
Screw
Screws
Controller
circuit board (C.B.)
Screw
Noise filter
base
Screw
Reactor
Screws
Electrical parts box
Thermistor
<2-phase pipe>
(TH6)