Mitsubishi Split-Type, Heat Pump Air Conditioner PUY-A30NHA2

Remove 2 front cover panel fixing screws (5 ✕ 10) and remove the front cover panel

Remove 2 back cover panel fixing screws (5 ✕ 10) and remove the back cover panel

Remove the electrical parts box

Remove 3 valve bed fixing screws (4 ✕ 10), 4 ball valve and stop valve fixing screws (5 ✕ 16), then remove the valve bed

Remove 3 right side panel fixing screws (5 ✕ 10) in the rear of the unit and then remove the right side panel

Remove 2 welded pipes of accumulator inlet and outlet

Disconnect the connectors, TH3 (white) and TH4 (white), on the controller circuit board in the electrical parts box

Loosen the clamp for the lead wire in the rear of the electrical parts box

Pull out the thermistor <Outdoor pipe> (TH3) and thermistor <Discharge> (TH4) from the sensor holder

Sign off on the thermistor disassemble

Upload a photo of the removed service panel

Upload a photo of the removed top panel

Disconnect the connector TH7 (red) on the controller circuit board in the electrical parts box

Loosen the clamp for the lead wire in the rear of the electrical parts box

Upload a photo of the loosened clamp for the lead wire

Pull out the thermistor <Outdoor> (TH7) from the sensor holder

Note: In case of replacing thermistor <Outdoor> (TH7), replace it together with thermistor <Outdoor 2-phase pipe> (TH6), since they are combined together

Disconnect the indoor/outdoor connecting wire from terminal block

Remove all the following connectors from controller circuit board

Remove a screw (4 ✕ 8) from the valve bed to remove the lead wire

Pull out the disconnected wire from the electrical parts box

Diagram symbol in the connector housing

Remove the terminal cover and disconnect the compressor lead wire

Remove an electrical parts box fixing screw (4 ✕ 10) and detach the electrical parts box by pulling it upward

(1) Remove the service panel. (See figure 1.)

(2) Remove the top panel. (See figure 1.)

(3) Remove the electrical parts box. (See photo 3.)

[Removing the 4-way valve coil]

(4) Remove 4-way valve coil fixing screw (M4 ✕ 6).

(5) Remove the 4-way valve coil by sliding the coil toward you.

(6) Disconnect the connector 21S4 (green) on the controllern board in the electrical parts box.

[Removing the linear expansion valve coil]

(4) Remove the linear expansion valve coil by sliding the coil upward.