Sanyo CHDXR09663, CHDX09663 Recovering Refrigerant, Following equipment and tools are required

5. Recovering Refrigerant

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

The following equipment and tools are required:

Jumper wire with clips, adjustable wrench, set of manifold gauge valves specially designed for refrigerant R410A only, vacuum pump, refrigerant recovery unit, pre-purged refrigerant cylinder for recovery, flathead screwdriver, and outdoor unit maintenance remote controller.

5-1. Refrigerant Recovery Procedures (from outdoor unit)

(1)Turn off the power of the outdoor unit beforehand (at power mains).

(2)Fully close each service valve on the liquid tube, gas tubes, and the balance tube of the outdoor unit.

(3)Connect the outdoor unit’s high-pressure and low-pressure outlet ports with the Hi and Lo sides of the manifold gauge valves using hoses. (Fig. 9)

CAUTION

The remaining refrigerant in the faulty outdoor unit may create internal pressure.
Before connecting hoses, be sure to confirm that each of the manifold gauge
valves is tightly closed. Note that the connection ports employ Schrader-type	2
push-to-release valves.

(4)Connect the manifold gauge valves, refrigerant recovery unit, and recovery cylinder using hoses. To avoid the entry of air into the refrigerant tubing, carry out this connection work carefully. (Fig. 9)

CAUTION

For detailed procedures such as connecting the refrigerant recovery unit with the recovery cylinder and methods used for recovery, follow the specific instructions that came with the refrigerant recovery unit.

(5)Locate the AP (Air Purge) pins on the control PCB in the faulty outdoor unit and short them using the clips of the jumper wire. Then restore electrical power to the outdoor unit.

CAUTION

By short-circuiting the AP pins, each solenoid valve in the outdoor unit is forcibly opened as soon as power comes on, which releases all remaining refrigerant into the recovery cylinder. Since neglecting this procedure may leave some refrigerant in the system, it is important that you carry out this step.

(6) Carry out refrigerant recovery.

CAUTION

To determine the completion of refrigerant recovery, follow the instructions that came with the refrigerant recovery unit.

Manifold		High-pressure outlet
	gauge
		port (For 5/16" (7.94mm)
Lo	Hi
		-dia. connector)

Refrigerant recovery unit

Refrigerant recovery cylinder

Low-pressure outlet port

(For 5/16" (7.94mm)-dia. connector)

Fig. 9

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