Toshiba MMY-MAP1006FT8(J)P-E Service Manual page 255

[When replacing normal as well as troubled compressor] - applicable to MMY-MMP0806*
1006
<Remove the normal compressor>
• Remove the normal compressor in the same way as the troubled compressor.
Note:
• Be sure to insulate the removed compressor leads using insulation tape, etc.
WARNING
When detaching a pipe by heating with a burner at brazed joint, take care as any oil left in the piping may burn in
a momentary flash of fire when the brazing filler metal melts.
<Measuring amount of oil in normal compressor>
• As was the case with the troubled compressor, measure the amount of oil contained by placing the compressor
on a scale.
Amount of oil in normal compressor: B [cc] = (Weight of compressor as it was dismantled (kg) - D) × 1042
(Specific volume of oil: 1042 [cc/kg])
Note:
Compressor model
RA421A3TB-20MD
※Please check the type name of the compressor as it was dismantled.
<Adjusting amount of oil in new compressors>
• Perform the adjustment on the basis of how much oil the troubled compressor contained, A [cc], and how much
oil the normal compressor contained, B [cc], by following the steps below.
Combined amount of oil in troubled and normal compressors A+B [cc]: 0 ≤ A+B < 2000
1
(1) Adjust the amount of oil in the two new compressors to 1000cc each (total 2000cc).
• Lay the compressors down and draw 900 [cc] of oil from each of them via their oil equalization pipes.
Notes:
• Do not draw more than 900 [cc] of oil from a compressor as it may cause damage.
• If troubled compressor contained 500cc or less, there may have been a problem with the oil equalization circuit,
etc. Perform checks in accordance with "11-3. Check Procedure to Search Cause of Compressor Oil Shortage".
Combined amount of oil in troubled and normal compressors A+B [cc]:
2
2000 ≤ A+B < 4300
(1) Adjust the amount of oil in the two new compressors to (A+B)/2 cc each.
• Lay the compressor down and draw [4300-(A+B)]/2 [cc] of oil from each of them
via their oil equalization pipes.
Combined amount of oil in troubled and normal compressors A+B [cc]:
3
4300 ≤ A+B
(1) Adjust the amount of oil in the two new compressors to (A+B)/2 cc each.
(Insert a hose into the discharge pipe or oil equalization pipe of each
compressor and inject (A+B)/2-1900 [cc] of oil using a funnel, etc.)
(kg)
Ｄ：Weight
(not include oil）
22.0
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Compressor