Toshiba MMU-AP0091H service manual Measurement of oil amount in the normal compressor, 202

When replacing both the defective and normal compressors

Removal of normal compressor

•Remove the normal compressor in the same way as the defective compressor.

Note)

• Be sure to apply insulation to the removed cable terminals with insulating tape, etc.

WARNING

Be aware that if oil is present when brazing, a fire eruption could occur.

Measurement of oil amount in the normal compressor

•As with measurement of oil amount in the defective compressor, place the defective compressor on a scale, and use the weight to calculate the oil quantity.

Oil amount of the normal compressor: B [cc] = (Removed compressor mass (kg) –23.5) × 1042

(Specific gravity of oil: 1042 [cc/kg])

Note)

• When the compressor holds no oil, the compressor mass is 23.5kg.

Adjustment of oil amount in the service compressor

•Adjust the oil amount in the service compressors based on the amount of oil found in the defective compres- sor (A cc) and normal compressor (B cc) by following instructions below.

1. If the total amount oil in both the compressors is

0 < (A + B) < 2000

1)Adjust the amount of oil in the two service compressors to 1000 cc each.

Lay the two service compressors down, and extract 900 cc of oil from each of the oil-equalization pipes.

•If the amount of oil in the defective compressor is below 500 cc, a fault in the oil-equalization circuit is possible.

Check the compressor using “15-3. Procedure to Identify the Cause of Compressor Oil Shortage”.

2. If the total amount of oil in both the compressors is

2000 < (A + B) < 3800

1)Adjust oil amount in the two service compressors to A + B [cc] each. 2

•Lay the two service compressors down and extract

3800 – (A + B) [cc] of oil from each oil-equalization pipe. 2

3. If the total amount of oil in both the compressors is:

3800 < A

1) Adjust the amount of oil in both the service compressors to A + B [cc] each. 2

(Insert a hose into the discharge pipe or oil equation pipe of the service compressor and then add

A + B – 1900 [cc] of oil using a funnel.)

2 

Compressor

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