10-20. AIR CONDITIONING SYSTEM TESTING (M1010) (Cont).
Never open high side valve (6) on air conditioner manifold gage set while
air conditioning system is operating, Refrigerant may be pumped back
into refrigerant container (1) and cause refrigerant container to explode,
resulting In serious lnjury or death to personnel.
l Perform step 10 if air conditioning system was determined to be low on
Ensure that engine is still running at 1500 rpm before performing
l Ensure that refrigerant container (1) remains upright when adding
refrigerant through low side valve (3),
Slowly open refrigerant container (1) valve and low side valve (3). Add refrigerant until gage
readings return to normal range and bubbles clear up in sight glass. Close low side valve and
refrigerant container valve.