Toshiba MMU-P0121H Service Manual page 147

NOTE :
Take 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 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. 100kg.
• 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.)
<Charging of oil>
Insert the hose up to the end of suction pipe mounting part of the compressor to be installed, and add the
necessary amount of oil using funnel, etc.
<Installation>
• Install the compressor in the reverse order of removing of compressor.
NOTE :
After installation, open fully the valve at bottom side of the compressor, using hexagonal wrench.
<Vacuuming>
• Connect the vacuum pump to the check joint of the discharge and suction pipes, and operate the vacuum pump.
• Perform vacuuming until the vacuum low-pressure gauge indicates 1 (mmHg).
<Charging of refrigerant>
• Add refrigerant of the same volume to the recovered refrigerant into the check joint of the suction pipe.
2. Outdoor unit (Fixed-speed units)
060 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
*
( : It is not provided in the cooling only model.)
• Remove the electric parts box. (M5 x 4, M4 x 3)
• Remove the cooling duct for electric parts. (M5 x 5)
• Remove the crank case heater.
• Remove the sound-proof mat.
• Remove the terminal cover of the compressor, and remove all wires.
• Remove two temp. sensors for oil detection from the pipe.
• Close the valve located under the compressor fully using a hexadecimal wrench.
*
, PMV B and 4-way valve
3-144
*
, etc.