Mitsubishi Electric MUZ-GL09NA-U1 Service Manual page 70

OPERATING PROCEDURE
4. Removing the discharge temperature thermistor,
defrost thermistor (MUZ), outdoor heat exchanger
temperature thermistor and ambient temperature
thermistor
(1) Remove the cabinet and panels. (Refer to 1.)
(2) Disconnect the lead wire to the reactor and the following
connectors:
<Inverter P.C. board>
CN641 (Defrost thermistor (MUZ) and discharge tempera-
ture thermistor)
CN643 (Ambient temperature thermistor)
CN644 (Outdoor heat exchanger temperature thermistor)
(3) Pull out the discharge temperature thermistor from its holder.
(4) Pull out the defrost thermistor from its holder.
(5) Pull out the outdoor heat exchanger temperature thermistor
from its holder.
(6) Pull out the ambient temperature thermistor from its holder.
5. Removing outdoor fan motor
(1) Remove the top panel, cabinet and service panel. (Refer to 1.)
(2) Disconnect the following connectors:
<Inverter P.C. board>
CN931 and CN932 (Fan motor)
(3) Remove the propeller fan nut.
(4) Remove the propeller fan.
(5) Remove the screws fixing the fan motor.
(6) Remove the fan motor.
NOTE: The propeller fan nut is a revers thread.
6. Removing the compressor and 4-way valve
(1) Remove the top panel, cabinet and service panel. (Refer to 1.)
(2) Remove the back panel. (Refer to 1.)
(3) Remove the inverter assembly. (Refer to 2.)
(4) Recover gas from the refrigerant circuit.
Recover gas from the pipes until the pressure gauge
NOTE:
shows 0 PSIG.
(5) Detach the brazed part of the suction and the discharge
pipe connected with compressor.
(6) Remove the compressor nuts.
(7) Remove the compressor.
(8) Detach the brazed part of 4-way valve and pipe. (Photo 7)
OBH733D
Outdoor heat
Photo 8
exchanger tempera-
ture thermistor
Photo 9
Photo 10
Brazed part of the
discharge pipe
70
PHOTOS
Ambient tem-
perature
thermistor
Defrost thermistor (MUZ)
Propeller fan nut
Screws of the
outdoor fan motor
Discharge temperature
thermistor
Brazed part of the suction pipe