Mitsubishi Split-Type, Heat Pump Air Conditioner PUZ-A42NHA2-BS

Disconnect the connectors, TH6 and 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

Pull out the thermistor <Outdoor 2-phase pipe> (TH6) from the sensor holder

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

Sign off on the thermistor disassemble

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

Remove 4 right side panel fixing screw (5 ✕ 10) in the rear of the unit and then remove the right side panel

Remove the linear expansion valve

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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

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

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

[Removing the 4-way valve coil]

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

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

(5) Disconnect the connector 21S4 (green) on the controller circuit board in the electrical parts box.

[Removing the linear expansion valve coil]

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

(4) Disconnect the connectors, LEV-A (white), on the controller circuit board in the electrical parts box.;

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

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

Remove the electrical parts box

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