OPERATING PROCEDURE

 

 

 

 

PHOTOS

 

 

 

 

 

 

 

2. Removing the inverter assembly, inverter P.C. board

Photo 3

 

 

 

 

 

 

 

 

 

 

 

 

(1)

Remove the cabinet and panels. (Refer to 1.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Screws of the

 

 

 

 

 

 

 

(2)

Disconnect the lead wire to the reactor and the following

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

relay panel

 

 

 

 

 

 

 

 

connectors:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<Inverter P.C. board>

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN721 (R.V. coil) (MUZ)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN931, CN932 (Fan motor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN641 (Defrost thermistor (MUZ) and discharge tempera-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ture thermistor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN643 (Ambient temperature thermistor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN644 (Outdoor heat exchanger temperature thermistor)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN724 (LEV)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(3)

Remove the compressor connector (CN61).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(4)

Remove the screws fixing the relay panel. (Photo 3)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(5)

Remove the inverter assembly. (Photo 4)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(6)

Remove the screw of the ground wire and screw of the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T.B.support. (Photo 4)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(7)

Remove the relay panel from the inverter assembly.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(8)

Remove the inverter P.C. board from the relay panel.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Photo 4 (Inverter assembly)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inverter

 

 

Heat sink

 

 

 

 

Screw of the

 

 

 

P.C. board

 

 

 

T.B.support

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. Removing R.V. coil (MUZ)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T.B.support

(1)

Remove the cabinet and panels. (Refer to 1.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(2)

Disconnect the following connectors:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<Inverter P.C. board>

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN721 (R.V. coil)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(3)

Remove the R.V. coil. (Photo 5)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Screw of the

 

 

 

Relay panel

 

 

 

ground wire

 

 

 

 

 

Photo 5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4. Removing the discharge temperature thermistor,

 

 

 

 

 

 

R.V. coil (MUZ)

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>

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 hold-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

er. (Photo 5)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(4)

Pull out the defrost thermistor from its holder. (Photo 6)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(5)

Pull out the outdoor heat exchanger temperature thermistor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

from its holder. (Photo 6)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(6)

Pull out the ambient temperature thermistor from its holder.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Discharge temperature thermistor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

41

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Image 41
Mitsubishi Electronics MUY-GE15NA Removing the inverter assembly, inverter P.C. board Photo, Photo 4 Inverter assembly

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