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* This flowchart is the standard for replacing compressors.
Each case must be considered on individual circumstances.
Replace the compressors based on the following conditions
of judgement.
1. Oil of 1900 cc is charged in a compressor for service.
2. The amount of oil is 3800 cc in an outdoor unit at shipment.
3. When a compressor is removed, it usually contains
800 to 1400 cc of oil.
Oil separator usually holds 0 to 1000 cc of oil.
Check oil color of the troubled compressor.
ASTM: Is 4 or more?
Judge the oil status based on the oil color,
and then decide to exchange the troubled
compressor only or both compressors.
Turn off power to the troubled outdoor unit.
Recover refrigerant from outdoor unit,
using a suitable device.
Remove the troubled compressor.
Exchange the malfunctioning compressor only.
Measure oil amount in the troubled compressor.
Replace both the malfunctioning compressor
and the normal compressor.
Measure the oil amount in the normal compressor.
Adjust oil amount based upon the measured oil amount.
Install two compressors.
Check for leakage in the malfunctioning outdoor unit.
Vacuum the malfunctioning outdoor unit.
Charge the refrigerant.
END
15. REPLACING COMPRESSOR
15-1. Compressor Replacing Procedure (Outline)
WARNING
Never recover the refrigerant into outdoor unit.
Be sure to use a refrigerant recovery device for refrigerant recovery for reinstallation or repair work.
Recovery into the outdoor unit is unavailable; otherwise a serious accident such as rupture or ingury could
occur.
NOTE) Full opening operation of PMV by CN30
short-circuiting rwill return to fully closed
after 2 minutes have passed.
To continue full-opening status, turn off
power to the outdoor unit within 2 minutes.