Mitsubishi Heavy Industries FDC1000KXZWE1, Service Manual, Page: 153 / 183

Precautions for safety
Read these "Precautions for safety" carefully before starting disassembly work and do it in the proper way.
When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram.
The electrical components are under high voltage by the operation of the booster capacitor.
Fully discharge the capacitor before commencing a repair work. Failure to observe this warning could result in electric shock.
When parts of refrigerant cycle is disassembled by welding, be sure to work after collecting a refrigerant, if the refrigerant isn't
collected, the unit might explode.
Be sure to collect refrigerant without spreading it in the air.
These contents are an example. Please refer to a similar part of actual unit.
2. To remove the lid of control box
(1) Remove the service panel.
1. To remove the service panel (See No.1) 3. To remove the top panel
(1) Remove 6 service panel (2) Remove 4 lid fixing screws and (1) Remove 4 top panel fixing screws
fixing screws and remove it. remove it. and remove it.
5. To remove the 4-way valve (20S)
(1) Remove the lid of control box.(See No.2)
(2) Disconnect the coil of 4-way valve connector (CNN1 or CNN5) on PCB in control box.
(3) Remove the top panel.(See No.3)
(4) Remove the coil of 4-way valve fixing screw (
mark) and remove it.
(5) Remove welded part of 4-way valve by welding. ( mark)
4. To remove the printed circuit board (PCB)
(1) Remove the lid of control box.(See No.2)
Control PCB
(2) Pull off all the inserted connectors.
(3) Take off 9 control PCB fixing locking supports
and remove it.( mark)
Inverter PCB
7. To remove bypass valve (SV) (4) Pull off all the inserted connectors.
(1) Remove the lid of control box.(See No.2) (5) Take off 6 inverter PCB fixing locking supports
(2) Disconnect the SV connector and remove it.( mark)
(CNN2 or 6 or 11)on PCB in control box.
(3) Remove the top panel.(See No.3)
(4) Remove the coil of SV fixing screw.
6. To remove the high pressure sensor (PSH)
( mark) (1) Remove the lid of control box.(See No.2)
(5) Remove 2 coil of SV fixing screws (2) Disconnect the PSH connector(CNL1) on PCB in control box.
and remove it.( mark) (3) Remove the top panel.(See No.3)
(6) Remove welded part of SV by welding. (4) Turn PSH to the left and remove it.
( mark) (Double spanners are needed.)
DISASSEMBLY PROCEDURE
PROCEDURE & PICTURES
(KXZW series)
Coil of
4-way valve
4-way
valve
6
.
OUTDOOR UNIT DISASSEMBLY PROCEDURE
'14 • KX-SM-200
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15 1
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