Sanyo CHDXR09663, CHDX09663, CHDX07263, CHDXR07263* Recovery of Refrigerant from Entire System

5. Recovering Refrigerant

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

Manifold

gauge

Lo Hi

Refrigerant recover unit

Refrigerant recovery cylinder

Liquid tube service port (For 5/16" (7.94mm)-dia. connector)

2

Gas tube service port

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

Fig. 11

5-3. Recovery of Refrigerant from Entire System

(1)Turn off power to the entire outdoor system.

(2)Short-circuit the AP (Air Purge) pins (CN102) on the outdoor control PCB of all outdoor units, then supply power to the outdoor units.

* By short-circuiting the AP pins and supplying power to the outdoor units, the solenoid valve in each unit is forcibly opened and all remaining refrigerant can be recovered.

(3)If any unit has encountered a power failure, follow the instructions in “5-1. Refrigerant Recovery Procedures (from Outdoor Units)” and perform refrigerant recovery for the faulty outdoor unit.

(4)Connect the manifold gauge to the high- and low-pressure outlet ports (Schrader-type valves) on any outdoor unit. (Fig. 11)

CAUTION

Remaining refrigerant may cause internal pressure. Check that each valve on the manifold gauge valves is tightly closed. The connection port uses a Schrader-type push-to-release valve.

(5)Connect the manifold gauge valves, refrigerant recovery unit, and refrigerant recovery cylinder. Quickly connect each part to prevent air from entering the tubing.

(6)Check that each service valve of the gas tubes, liquid tube, and the balance tube for the outdoor unit has opened, then perform refrigerant recovery.

* If only a single outdoor unit is installed, the balance tube is not used. Therefore, leave this valve closed.

NOTE

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

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