Mitsubishi FDT71VH - Page 177

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176
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'20 • PAC-SM-351
Precauons for safety
Read these "Precauons for safety" carefully before starng 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 operaon 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 aer collecng 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.
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.
Control PCB
(3)
Take off 4 control PCB fixing locking supports(
mark)
and remove it.
Power PCB
(4)
Take off 6 power PCB fixing locking supports(
mark)
and remove it.
3.
To remove the boom panel(B)
(1)
Remove 18 panel fixing screws and remove it.
5.
To remove the motor PCB
4.
To remove the impellers and motors(FM)
(1)
Remove the lid of control box.
(1)
Remove the lid of control box.(See No.1)
(See No.1)
(2)
Remove the boom panel(B).(See No.3)
(2)
Remove the boom panel(B).
(3)
Disconnect the motor connector(CNFMx or CNMx) on PCB in control box.
(See No.3)
(4)
Remove the motor fixing screw and remove it.
(3)
Disconnect the motor PCB connector
(
mark/right and le side)
(CNFMx or CNMx)on PCB in control box.
(5)
Remove the fan casing fixing screw and remove it.(
mark)
(4)
Remove 2 motor PCB fixing screws
(6)
Remove the sirocco fan fixing bolt and remove it.(
mark)
and remove it.
6.
To remove the temperature sensors (example"Thi-A")
(1)
Remove the lid of control box.(See No.1)
(2)
Remove the boom panel(B).(See No.3)
(3)
Disconnect the Thi-A connector(CNH) on PCB in control box.
(4)
Pull the temperature sensor fixing clip and remove it.(
mark)
DISASSEMBLY PROCEDURE
PROCEDURE & PICTURES
(FDU FDUM series)
PJG012D019
Control PCB
Power PCB
Motor
Motor PCB
Motor
(Boom)
(Top)
Boom panel(B)
1
(c) FDU, FDUM series
PJG012D019