Toshiba MMC-P0151H, Руководство по обслуживанию

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3-11-2. Replacing Method of Compressor
After recovery of refrigerant has completed, turn off the power supply, and replace the compressor according to
the following method.
[In case of removal of the compressor from the front side]
1. Outdoor units (Inverter and fixed-speed units)
080, 100 type
<Removing of parts>
• Remove the front panel. (M5 x 7)
• Disconnect all wires connected to the electric parts box.
Temp. sensor, pressure sensor, complete, 2-way valve, PMV A
*
, PMV B and 4-way valve
*
, etc.
(
*
: It is not provided in the cooling only model.)
• Remove the electric parts box. (M5 x 4, M4 x 3)
• Remove the pressure sensor installation plate.
(Do not remove the pressure sensor.) (M4 x 2)
• Remove the cooling duct for the electric parts. (M5 x 5)
• Remove the crank case heater. (Only for fixed-speed unit)
• Remove the sound-proof mat.
• Remove the terminal cover of the compressor, and remove
all wires.
• Close the valve located under the compressor fully using a
hexadecimal wrench.
<Extraction of oil from compressor>
• Cut the case bypass located at the bottom of the
compressor by height same as that of the suction pipe.
• Connect hose to the cut case bypass, and insert the
opposite side of the hose in the container which oil is
entered. 7.5
l
or more oil may flow through the hose, so
use a container with capacity of 8.0
l
or more.
• Apply nitrogen gas with approx. 0.02MPa from service
valve at gas side to extract oil.
(Extract oil completely.) (Be sure to spurt of oil when gas is applied exceedingly.)
<Removing of compressor>
• Remove two discharge pipes, suction pipe, upper oil return piping, oil tank piping, and case bypass piping.
NOTE :
Take a great care that, in case of removing the pipe by heating with a torch the brazed part, if oil is remaining in
the pipe, a flame may be emitted at the moment when flux has been melted.
• Loosen the flare nut at the bottom side of the compressor to remove the pipe.
• Remove the screws fixing the bottom plate for the compressor. (M5 x 6)
• Pull out the compressor with the bottom plate for the compressor.
NOTE :
Weight of the compressor is approx. 100 kg.
• Remove the nuts fixing the compressor. (M12 x 3)
• Remove the compressor.
<Measurement of oil volume>
• Measure oil volume extracted from the compressor, and determine whether to add oil or not.
Recovered oil volume (cc) –7500 (cc) = Oil volume to be added (cc)
(If the calculated volume is minus value, addition is unnecessary.)
Case
bypass pipe
Valve at bottom side
of the compressor
Brazed positions
to be removed