MXZ-5C42NA3 Service Manual

OPERATING PROCEDURE PHOTOS/FIGURES
4. Removing the compressor and 4-way valve
(1) Remove the top panel, the service panel, and the front
panel (Refer to section 1).
(2) Disconnect the power supply cord and indoor/outdoor
connecting wires, and remove the back panel.
(3) Recover gas from the refrigerant circuit.
NOTE: Recover gas from the pipes until the pressure
gauge shows 0 PSIG.
(4) Disconnect the compressor lead wire from the terminal of
the compressor (U, V, W).
(5) Disconnect the outdoor control P.C. board connectors:
CNF1, CNTH1, CNTH2, CN63H, CN712, CN791, CN792,
CN793, CN794 (MXZ-4C)
(6) Remove all the screws fixing the electrical parts, and
remove the electrical parts.
(7) Remove the propeller fan.
(8) Remove all the screws fixing the separator, and remove
the separator.
(9) Remove the sound proof felt.
(
10 ) Detach all the brazed parts of the compressor suction and
discharge pipes (Photo 17).
(
11 ) Remove all the compressor nuts and remove the compres-
sor (Photo 17).
( 12 ) Detach all the brazed parts of 4-way valve and pipes.
5. Removing the expansion valve
NOTE: Gas recovery is not required if the unit is pumped down.
(1) Remove the top panel and the service panel (Refer to
section 1).
(2) Disconnect the power supply cord and indoor/outdoor
connecting wires.
(3) Remove all the LEV coils.
NOTE: When reassembling, to secure the LEV coils on the
pipe, make sure to use the metal clips for proper
positioning.
(4) Detach all the brazed parts of the expansion valves and
pipes.
149
Photo 17
Suction pipe
brazed part
Compressor nuts
LEV coils
Expansion
valves
Expansion
valves
Discharge pipe
brazed part
4-way valve
R.V. coil
Brazed parts
Photo 16
Photo 15
Screws of the electrical parts
OBH702M