Photo 5
Defrost thermistor
5. Removing outdoor fan motor
(1) Remove the top panel, cabinet and service panel (Refer to 1).
(2) Disconnect the power supply and indoor/outdoor connecting wire.
(3) Disconnect the connectors for outdoor fan motor.
(4) Remove the propeller nut.
(5) Remove the propeller.
(6) Remove the screws fixing the fan motor (Photo 6).
(7) Remove the fan motor.
Photo 7 6. Removing the compressor and 4-way valve
(1) Remove the top panel, cabinet and service panel (Refer to 1).
(2) Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel (Refer to 1).
(3) Remove the inverter assembly (Refer to 2).
(4) Recover gas from the refrigerant circuit.
NOTE:
Recover gas from the pipes until the pressure gauge shows 0 kg/cm2 (0 MPa).(5) Detach the welded part of the suction and the discharge pipe connected with compressor.
(6) Remove the nuts of compressor legs.
(7) Remove the compressor.
(8) Detach the welded part of pipes connected with 4-way valve (Photo 7).
Photo 6
Screws of the outdoor fan motor Outdoor heat exchanger temperature thermistorPropeller Propeller nut
OPERATING PROCEDURE PHOTOS
1. Removing the compressor
(1) Remove the screws of the top panel, and remove the top panel.
(2) Remove the screws of the service panel, and remove the service panel.
(3) Recover gas from the refrigerant circuit.
NOTE:
Recover gas from the pipes until the pressure gauge shows 0 kg/cm2 (0 MPa).(4) Remove the screws of the cabinet, and remove the cabinet.
(5) Remove the screws of the back panel, and remove the back panel (Photo 3).
(6) Disconnect the compressor lead wire from terminal of the compressor (U, V, W).
(7) Disconnect the outdoor electronic control P.C. board connectors:
CN661, CN662 (MXZ-3A54/4A71VA- , , ), CN663, CN791, CN792, CN793, CN794 (MXZ-4A71VA- , , , ), CN795, CN931, CN932
Disconnect the noise filter P.C. board connector:
CN912
(8) Remove the screws of the electrical parts, and remove the electrical parts (Photo 4).
(9) Remove the propeller.
(10) Remove the screws of the separator, and remove the separator (Photo 6).
(11) Remove the sound proof felt (Photo 6).
(12) Detach the welded parts of the compressor suction and dis- charge pipes (Photo 5).
(13) Remove the compressor nuts and remove the compressor.
Photo 2
14-2. MXZ-3A54VA -
E1,
E2,
E3,
E4MXZ-4A71VA -
E1,
E2,
E3,
E4Photo 1
Screws of the cabinet
Screws of the top panel
Screw of the cabinet
Screws of the cabinet Screws of service panel
Screws of the top panel
Screws of the cabinet
Screws of the cabinet
E1 E2 E3
E1 E2 E3 E4
OPERATING PROCEDURE PHOTOS
2. Removing the fan motor
(1) Remove the top panel, the service panel, and the cabinet (Photo 1, 2).
(2) Disconnect the connector CN931 and CN932 on the outdoor electronic control P.C. board.
(3) Remove the propeller.
(4) Remove the fan motor.
Photo 6
Screws of the outdoor fan motor
Propeller
Propeller nut
Separator
Sound proof felt
Photo 3
Screws of the electrical parts
Photo 4
R.V. coil4 way valve LEV coil E
Expansion valve E
Suction pipe welded part Discharge pipe welded part
Photo 5
Compressor nuts
Screw of the rear guard
Screw of the back panel
Screws of the back panel
Screws of the back panel
Screw of the back panel
OPERATING PROCEDURE PHOTOS
5. Removing the reactor
(1) Remove the top panel (Photo 1).(2) Remove the service panel, cabinet, back panel, and the electrical parts (Photo 1, 2, 3, 4).
(3) Disconnect the reactor lead wire from the terminal of the reactor.
(4) Remove the screws of the reactor, and remove the reactor (Photo 9).
Photo 9
Screws of the reactor
3. Removing the 4-way valve
(1) Remove the top panel (Photo 1).
(2) Remove the service panel, the cabinet, and the back panel (Photo 1, 2, 3).
(3) Recover gas from the refrigerant circuit.
NOTE:
Recover gas from the pipes until the pressure gauge shows 0 kg/cm2 (0 MPa).(4) Remove the electrical parts (Photo 4).
(5) Detach the welded parts of 4-way valve and pipe (Photo 7).
4. Removing the expansion valve
(1) Remove the top panel (Photo 1).(2) Remove the service panel, the cabinet, and the back panel (Photo 1, 2, 3).
(Gas recovery is not required if the unit is pumped down.) (3) Remove the electrical parts for removing LEV E (Photo 4, 5).
(4) Remove the LEV coils.
(5) Detach the welded parts of expansion valves and pipes.
4 way valve
R.V. coil
Welded parts
LEV coils Expansion
valves
Photo 7
Photo 8
OPERATING PROCEDURE PHOTOS
1. Removing the compressor
(1) Remove the screws of the top panel, and remove the top panel.
(2) Remove the screws of the service panel, and remove the service panel.
(3) Recover gas from the refrigerant circuit.
NOTE:
Recover gas from the pipes until the pressure gauge shows 0 kg/cm2 (0 MPa).(4) Remove the screws of the cabinet, and remove the cabinet.
(5) Remove the screws of the back panel, and remove the back panel (Photo 3).
(6) Disconnect the compressor lead wire from terminal of the compressor (U, V, W).
(7) Disconnect the outdoor electronic control P.C. board connectors:
CN661, CN663, CN791, CN792, CN793,
CN794 (MXZ-4A71VA-E5 ,E6,E7 ), CN795, CN931, CN932 Disconnect the noise filter P.C. board connector:
CN912
(8) Remove the screws of the electrical parts, and remove the electrical parts (Photo 4).
(9) Remove the propeller.
(10) Remove the screws of the separator, and remove the separator (Photo 6).
(11) Remove the sound proof felt (Photo 6).
(12) Detach the welded parts of the compressor suction and dis- charge pipes (Photo 5).
(13) Remove the compressor nuts and remove the compressor.
Photo 2
14-3. MXZ-3A54VA -
E5,
E6,
E7MXZ-4A71VA -
E5,
E6,
E7Photo 1
Screws of the cabinet
Screws of the top panel
Screw of the cabinet
Screws of the cabinet Screws of service panel
Screws of the top panel
Screws of the cabinet
Screws of the cabinet
2. Removing the electronic control P.C. board
(1) Remove the screws of the sub panel.(2) Remove the sub panel.
(3) Disconnect all connectors and lead wires on the electronic control P.C. board.
(4) Remove the electronic control P.C. board.
Screws of the sub panel