Haier AB12CS1ERA Service Manual page 327

Super Match
■ Only in COOLING operation can charge the additional refrigerant.
■ When charging, the refrigerant shall be charged from the charging nozzle of low pressure valve.
■ Be carefull when charging refrigerant, do not let the air mix into the system, and must charge the additional
refrigerant in liquid state.
Piping vavuum method: to use vacuum pump
1. Detach the service port's cap of gas stop valve, the valve rod's cap for liquid stop
valve and gas stop valve, and connect the service port into the projection of charge
hose (low) for gaugemanifold. Then connect the projection of charge hose (center) for
gaugemanifold into vacuum pump.
2. Open the handle at low in gaugemanifold, and operate vacuum pump. If the scale-
moves of gause (low) reach vacuum condition in a moment, check the step 1 again.
3. Vacuumize for over 15min. And check the level gauge which should read - 0.1MPa (-76
cm Hg) at low pressure side. After the completion of vacuumizing, close the handle
'Lo' in the vacuum pump. Check the condition of the scale and hold it for 1-2min. If the
scale-moves back in spite of tightening, make flaring work again, then return to the
beginning of the step 3.
4. Open the valve rod for the liquid stop valve to an angle of anticlockwise 90 degree.
After 6 seconds, close the liquid stop valve and make the inspection of gas leakge.
5. No gas leakage? In case of gas leakage, tighten parts of pipe connection. If leakage stops, then proceed the
step 6. If it does not stop gas leakage, discharge whole refrigerants from the service port. After flaring work again
and vacuumize, fill up prescribed refrigerant from the gas cylinder.
6. Detach the charge hose from the service port, open liquid stop valve and gas stop
valve. Turn the valve rod anticlockwise until hitting lightly.
7. To prevent the gas leakage, turn the service ports cap, the valve rodis cap for liquid
stop valve and gas stop valve a little more than the point where the torque increases
suddenly.
CAUTION
If the refrigerant of the air conditioner leaks, it is necessary to make all the refrigerant out. Vacuumize first, then
charge the liquid refrigerant into air conditioner according to the amount marked on the nameplate.
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