Troubleshooting

Balance Refrigerant of the 3-way Valve

(Gas leakage)

Indoor unit

Liquid side

 

Outdoor unit

3-Way

valve Open

Gas side

3-Way

valve Open

Lo

OPEN CLOSE

• Procedure

(1)Confirm that both the 2-way and 3-way valves are set to the back seat.

(2)Connect the charge set to the 3-way valve’s port.

Leave the valve on the charge set closed.

Connect the charge hose to the service port.

(3)Open the valve (Lo side) on the charge set and discharge the refrigerant until the gauge indi- cates 0 kg/cm2G.

If there is no air in the refrigerant cycle (the pressure when the air conditioner is not running is higher than 1 kg/cm2G), discharge the refrig- erant until the gauge indicates 0.5 to 1 kg/cm2G. if this is the case, it will not be neces- sary to apply a evacuatin.

Discharge the refrigerant gradually; if it is dis- charged too suddenly, the refrigeration oil will also be discharged.

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Friedrich MR12C1H, MW12C1H, MW09C1H, MR09C1H manual Balance Refrigerant of the 3-way Valve