Toshiba MMY-MAP1004HT5P Service Manual page 253

[When replacing normal as well as faulty compressor] - applicable to MMY-MAP0804 ,
1004 and 1204
<Dismantling normal compressor>
• Dismantle the normal compressor in the same way as the faulty compressor.
Note:
• Be sure to insulate the removed compressor leads using insulation tape, etc.
WARNING
When detaching a pipe by heating with a burner a welded joint, take care as any oil left in the piping may burn in a
momentary flash of fire when the weld filler metal melts.
<Measuring amount of oil in normal compressor>
• As was the case with the faulty 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
DA421A3FB-28M
DA421A3TB-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 faulty compressor contained, A [cc], and how much oil
the normal compressor contained, B [cc], by following the steps below.
1
Combined amount of oil in faulty and normal compressors A+B [cc]: 0
(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 the faulty 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".
2
Combined amount of oil in faulty and normal compressors A+B [cc]:
2000 A+B < 3800
(1) Adjust the amount of oil in the two new compressors to (A+B)/2 cc each.
• Lay the compressors down and draw [3800-(A+B)]/2 [cc] of oil from each of them
via their oil equalization pipes.
3
Combined amount of oil in faulty and normal compressors A+B [cc]:
3800 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）
22.7
22.0
– 252 –
A+B < 2000
Compressor