Service Manual MM09YJ-MM12YJ

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Installation and Maintenance
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Lo
Closed
Purge the air
Outdoor unit
Indoor unit
Liquid side
Gas side
CLOSE
Open
2-Way
valve
3-Way
valve
CLOSE
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– Remove the valve stem caps and confirm that the valve stems
are in the raised position.
– Be sure to use a hexagonal wrench to operate the valve stems.
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– Connect the charge hose with the push pin to the service port.
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– Open the low-pressure valve on the charge set slightly to air
purge from the charge hose.
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– Do this quickly so that the gauge ends up indicating 3 to 5kg/
cm
2
g.
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– Use torque wrench to tighten the service port nut to a torque
of 1.8 kg.m.
– Be sure to check for gas leakage.