Mitsubishi Split-Type Air Conditioner PUZ-A42NKA7

Remove 5 fan grille fixing screws (5 × 12) to detach the front panel and the fan grille together

Remove a nut (for right handed screw of M6) to detach the propeller

Disconnect the connectors, CNF1, CNF2 (white) on the controller circuit board in electrical parts box

Remove 4 fan motor fixing screws (5 × 25) to detach the fan motor

When attaching the fan motor, make sure to route the cable through the hook below the fan motor and fix firmly with the clamp

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Sign off on the fan motor replacement

Disconnect the connectors on the controller circuit board

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

Pull out the thermistors from the sensor holder

Sign off on the thermistor replacement

Warning: This procedure requires trained personnel with PPE!

Remove 3 service panel fixing screws (5 × 12) and slide the hook on the right downward to remove the service panel.

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Remove screws (3 for front, 3 for rear/5 × 12) of the top panel and remove it.

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Remove 4 grille fixing screws (5 × 12) from each grille and remove it.

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Pull down the ice guard and remove it.

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

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

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

(4) Remove the reactor fixing screws (6 places, 4 × 10) and remove the reactor.

(4) Remove 2 capacitor band fixing screws (4 × 10) and remove the capacitor.

Note 1: The reactor and capacitor is attached to the rear of the electrical parts box.

Note 2: The 3 pieces of reactors to be replaced must have the same color of sticker. (Green, Orange, or Blue);

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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

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

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