Toshiba A90-0132, Service Manual

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Replacing the compressor
Compressor replacement procedure
2. Outdoor unit
MM-A0160HX
MM-A0160CX
Removing of parts
• Remove the front painted panel.
• Remove electrical parts cover.
• Disconnect all wires connected to the electric parts box, temp. sensor, pressure sensor, complete, 2-way valve, PMV,
etc..
• Remove the electric parts box.
• Remove the rear painted panel.
• Remove the crank case heater.
• Remove the sound-proof blanket.
• Remove the terminal cover of the compressor, and remove all wires.
• Remove two temp. sensors for oil detection from the pipe.
• Fully close the valve located under the compressor fully using a hexagonal wrench.
Extraction of oil from compressor
• Cut the case bypass located at the bottom of the compressor by
the same height as that of the suction pipe.
• Connect hose to the cut case bypass, and insert the opposite side
of the hose in the container in which oil is discharged. 2 l or more
oil may flow through the hose, so use a container with capacity
of 2.5 l or more.
• Apply nitrogen gas with approx. 0.02MPa from service valve at
gas side to extract oil.
(Extract oil completely.)
Removing of compressor
• Remove the discharge pipe, suction pipe, upper oil return
piping, oil tank piping, and case bypass piping.
(Same case for removing from the front side)
NOTE:
Take great care when removing the pipes with a brazing torch –
if oil is remaining in the pipe, a flame may be emitted at the moment
when the flux melts.
•
Loosen the flare nut at the bottom side of the compressor to remove the pipe.
• Remove the metal fixing the oil tank.
• Remove the oil tank. (Two brazing positions)
• Remove the screws fixing the bottom plate for the compressor.
• Pull out the compressor with the bottom plate for the compressor.
NOTE:
Weight of the compressor is approx. 45kg.
•
Remove the nuts fixing the compressor.
• Remove the compressor.
Fixing metal
6HP
Compressor
Brazed
positions to
be removed
Oil tank