Sanyo CHDXR09663 Discharging Compressor Oil, Discharging Oil from Oil Separator, Checking the Oil

3. Discharging Compressor Oil

W-2WAY ECO-i SYSTEM Outdoor Unit Repair Procedures

Discharged oil can be used for checking the condition of the system. Based on the appearance and color of the discharged oil, a judgment can be made on whether the system is operating normally or not.

3-1. Discharging Oil from Oil Separator

Recover the refrigerant from the outdoor unit following the procedure given in “5. Recovering Refrigerant.” Install hoses as indicated on the equipment and feed nitrogen gas gradually to provide pressure to the system from the low-pressure outlet and collect oil in a pan or container. (Fig. 8)

• The low-pressure outlet port is at the Lo side of the right side.

CAUTION

•A faulty outdoor unit may remain pressurized. The oil outlet port employs a Schrader-type push-to-release valve. Be careful to avoid accidental oil release when using the port.

2

Packless valve or the like

Container

Oil outlet port (For 1/4" (6.35mm)

-dia. connector)

Manifold gauge

Lo Hi

Nitrogen gas

	Low-pressure outlet port
Fig. 8	(For 5/16" (7.94mm)-dia. connector)

3-2. Discharging Oil in Compressor

Recover the refrigerant in the outdoor unit following the procedures in “5. Recovering Refrigerant.” Remove the compressor and discharge the oil in it. Refer to “10. Compressor” for detailed procedures.

3-3. Checking the Oil

Acceptance/rejection criteria for the oil

Condition of		Condition of oil		Judgment criteria for changing oil*
refrigeration cycle	Color		Odor	Total acid value	Hue
Normal	Yellowish		None	0.02 or less	3.5 or less
Abnormal overheat-			Smells somewhat	0.06 or over	4.0 or over
	Brownish
				Changing the oil and system cleaning
operation			(not as strong as below)
				with dry-cores are necessary.
Motor burnout	Brownish /		Pungent / burnt odor	Changing the oil and system cleaning
	blackish			with dry-cores are necessary.

*It is difficult to measure the total acid value in the field, therefore oil hue and odor are the rule of thumb. Checking for carbon deposits and abrasive metal powder can additionally be used to assess the system condition.

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