Mitsubishi Electric MUZ-FH09NA Service Manual page 50

OPERATING PROCEDURE
4. Removing the discharge temperature thermistor,
defrost thermistor, outdoor heat exchanger tempera-
ture 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>
CN671 (Defrost thermistor, discharge temperature thermis-
tor and outdoor heart exchanger temperature ther-
mistor)
CN672 (Ambient 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.
(4) Remove the screws fixing the fan motor.
(5) Remove the fan motor.
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) Remove the soundproof felt.
(5) Recover gas from the refrigerant circuit.
NOTE:
Recover gas from the pipes until the pressure gauge
shows 0 PSIG.
(6) Detach the brazed part of the suction and the discharge
pipe connected with compressor.
(7) Remove the nuts fixing the compressor.
(8) Remove the compressor.
(9) Detach the brazed parts of 4-way valve and pipe. (Photo 4)
OBH584A
Photo 7
Outdoor heat exchanger
temperature thermistor
Photo 8
Screws of the
outdoor fan motor
Photo 9
Brazed part of the
suction pipe
50
PHOTOS
Ambient temperature
thermistor
Defrost thermistor
Soundproof felt
Brazed part of the
discharge pipe
Discharge temperature
thermistor