SAFARI

34 AIRCONDITIONING b. Check the Amount of Refrigerant. 1. Check the sight glass on the receiver or the high pressure pipe. Important Appropriate quantity: There are no visible bubbles. But sometime visible bubbles appear. Excessive quantity: There are no visible bubbles inside the flow. In this case, however, the high and low pressures wi l l both be high, so the cool ing wi l l be inadequate. Check the manifold gauge. Insufficient refrigerant: There are bubbles visible inside the flow. (Bubbles are continuously flowing). 2. Check the amount of refrigerant by following the instructions given in table below: INSUFFI- CIENT APPROPRIATE SIGHT GLASS Fig. 48 - Sight glass indications (If fitted) EXCESSIVE Item Symptom Amount of Refrigerant Remedy 1. Bubbles present in sight glass Insufficient Check for leak with gas leak detector 2. No bubbles present in sight glass Empty, proper or too much Refer to items 3 and 4 3. No temperature difference between Empty or nearly empty Evacuate and charge system. Then compressor inlet and outlet check for leak with gas leak detector. 4. Temperature between compressor Proper or too much Refer to items 5 and 6 inlet and outlet is noticeably different 5. Immediately after air conditioner Too much Discharge excessive refrigerant to turned off, refrigerant in sight glass specified amount. stays clean. 6. When air conditioner is turned off, Empty, proper or too much Refer to items 3 and 4 refrigerant foams and then stays clear