Daikin Indoor Unit Wall Mounted Type FTXS20D3VMW

Warning: Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Remove the outer panels and plates.

1 Loosen the 3 screws on the right of the right side panel.

2 Loosen the 2 screws on the back.

3 Remove the packing. There is a hook on the back.

4 Pull up the right side panel.

5 Loosen the 2 screws of the wiring fixture.

Warning: This procedure requires trained personnel with PPE!

EV connector correctly inserted in the PCB

All EVs generate latching sound after power cycle

If any EV does not generate latching sound, proceed to next step

Conductivity between pins 1, 3 and 6, and between pins 2, 4 and 5

If no EV generates latching sound, the outdoor unit PCB is faulty

Mount a good coil in the EV unit that did not generate latching sound

If latching sound is generated, the outdoor unit PCB is faulty

If latching sound is not generated, the EV unit is faulty

2. Check motor power supply voltage output (pins 4-7 and 4-8).

3. Check motor control voltage (pins 4-3).

4. Check rotation command voltage output (pins 4-2).

5. Check rotation pulse input (pins 4-1).

2. Check motor control voltage output (pins 2-1).;

Warning: Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Take care not to cut your finger by the fins of the heat exchanger.

Loosen the 4 screws (2 on both sides) of the top panel.

Loosen the 6 screws of the front panel.

Loosen the 2 screws (each 1 in front and back) of the clamp plate.

Slide the clamp plate to the left to undo the hooks and remove the plate.

Undo the upper 2 hooks to remove the front panel.

Align the position of hole of the upper hook to pull the front panel out.

Warning: Check the main circuit for short-circuit before proceeding

Main circuit checked for short-circuit?

Warning: Be careful never to touch any live parts.

Measure the voltage according to the model's drawing

Sign off on the capacitor voltage check