Disassembly Procedure; Indoor Units; Outdoor Units; Defrost Operation - Mitsubishi Heavy Industries FDF71VNXWVH Service Manual

2.3 DISASSEMBLY PROCEDURE

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.
Read these "Precau ons for safety" carefully before star ng disassembly work and do it in the proper way.
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Fully discharge the capacitor before commencing a repair work. Failure to observe this warning could result in electric shock.
When disassembling, be sure to turn off the power. When disassembling the electrical components, check the electrical wiring diagram.
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When parts of refrigerant cycle is disassembled by welding, be sure to work after collecting a refrigerant, if the refrigerant isn't
The electrical components are under high voltage by the opera on of the booster capacitor.
●
collected, the unit might explode.
Fully discharge the capacitor before commencing a repair work. Failure to observe this warning could result in electric shock.
Be sure to collect refrigerant without spreading it in the air.
When parts of refrigerant cycle is disassembled by welding or low pressure sensor is removed, be sure to work
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These contents are an example. Please refer to a similar part of actual unit.
a refrigerant, if the refrigerant isn't collected, the unit might explode.
Be sure to collect refrigerant without spreading it in the air.
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(1) Indoor units ..................................................................... See page 181.
These contents are an example. Please refer to a similar part of actual unit.
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(2) Outdoor unit
(a) Models FDC125, 140VN(S)A-W
1. To remove the service panel
(1) Remove 5 service panel fixing
screws and remove it.
Coil of EEV
EEV
3. To remove the impeller and motor (FM)
(1) Remove the lid of control box.(See No.1)
(2) Disconnect the motor connector(CNMx) on PCB in control box.
(3) Remove 5 bellmouth fixing screws and remove it.(
3. To remove the electronic expan on valve (EEV)
(4) Remove the impeller fixing nut and remove it.(
(1) Remove the service panel.(See No.1.)
(5) Remove 2 plate fixing screws and remove it.(
(2) Disconnect the EEV connector(CNEEVx) on PCB in control box.
(6) Remove 3 motor fixing nuts and remove it.(
(3) Remove the coil of EEV by pull out on the top.
(4) Remove welded part of EEV by welding. (
4. To remove the high pressure switch (63H)
(1) Remove the service panel.(See No.1.)
(2) Disconnect the 63H connector(CNH) on PCB in control box.
(3) Remove welded part of high pressure switch by welding.(
5. To remove drain pump (DM) and flot switch (FS)
(1) Remove the drain pan.(See No.4)
(2) Pull the hose to the arrow direction and remove it.
(3) Remove 3 drain pump fixing screws and remove it.(
(4) Remove the flot switch fixing screw and remove it.(
6. To remove the temperature sensors (example"Tho-D1")
(1) Remove the service panel.(See No.1.)
(2) Disconnect the Tho-D1 connector(CNTH) on PCB in control box.
(3) Pull out the temperature sensor "Tho-D1" from the sensor holder.
DISASSEMBLY PROCEDURE
DISASSEMBLY PROCEDURE
Precaut ions for safety
Precau
PROCEDURE & PICTURES
PROCEDURE & PICTURES
2. To remove the fan motor (FM)
(1) Remove the service panel.(See No.1.)
(2) Disconnect the motor connector(FMxx or CNFxx) on PCB in control box.
(3) Remove 4 fan guard fixing screws and remove it.( ← mark)
(4) Remove the propeller fan fixing nut and remove it.(
(5) Remove 4 fan motor fixing nuts and remove it.(
mark)
mark)
mark)
mark)
mark)
○
○
6. To remove the temperature sensors (example"Thi-R1")
(1) Remove the drain pan.(See No.4)
(2) Pull out the temperature sensor"Thi-R1" from the sensor holder.
-
afety
(FDT series)
(FDC series)
1. To remove the lid of control box
(1) Remove 2 lid fixing screws and remove it.
2. To remove the printed circuit board (PCB)
(1) Remove the lid of control box.(See No.1)
(2) Pull off all the inserted connectors.
(3) Take off 6 fixing hooks and remove it.
4. To remove the drain pan
(1) Remove the lid of control box.(See No.1)
(2) Pull off all the inserted connectors.
(3) Remove 2 plate fixing screws and remove it.
( mark)
(4) Remove 2 lid fixing screws and remove it.
( mark)
(5) Remove 4 drain pan fixing screws and remove it.
Coil of 4-way
( mark)
valve
63H
mark)
5. To remove the 4-way valve (20S)
(1) Remove the service panel.(See No.1.)
(2) Disconnect the coil of 4-way valve connector
(CNS) on PCB in control box.
mark)
(3) Remove the coil of 4-way valve fixing screw
mark) and remove it.( ← mark)
(4) Remove welded part of 4-way valve by
welding. (
214
-
'22 • PAC-SM-426
PJF012D045
PCA012D089A
er collec ng
PCA012D089A
mark)
□
mark)
○
4-way valve
mark)
□
B
1
1