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44 Room Air Conditioner
Troubleshooting Guide
2-way, 3-way Valve
2-way Valve (Liquid Side) 3-way Valve (Gas Side)
Shaft position Shaft position Service port
Closed Closed Closed
(with valve cap) (with valve cap) (with cap)
Open Closed Open
(counter-clockwise) (clockwise) (push-pin or with
vacumm pump)
Open Open Closed
(with valve cap) (with valve cap) (with cap)
Closed Open Open
(clockwise) (counter-clockwise) (connected manifold
gauge)
Open Open Open
(with charging
cylinder)
Open Open Open
(with charging
cylinder)
Open Open
Open Open
Works
Shipping
Air purging
(Installation)
Operation
Pumping down
(Transfering)
Evacuation
(Servicing)
Gas charging
(Servicing)
Pressure check
(Servicing)
Gas releasing
(Servicing)
1.
2.
3.
4.
5.
6.
Valve cap
Open position
Closed position
Pin
Service
port
Service
port cap
To outdoor unit
Flare nut
To
piping
connection
To outdoor unit
Hexagonal wrench (4mm)
Open position
Closed position
To
piping
connection
Flare nut
Open
(with charging
cylinder)
Open
(with charging
cylinder)