1. Checking the air conditioning system.
①Economic friendly refrigerant : R134a 0.7∼0.85Kg.
The presence of air and water in the system could jeopardize its efficiency.
-The air is uselessly compressed by the compressor and no cooling effect is produced.
-The moisture has a tendency rise to obstructions which prevent the cooling efficiency.
② Check belt tension ; when finger pressure is applied to the mid-point between both pulleys.
③ Condenser fins must always be duly clean using water or an air set.
2. Checking the air conditioning system charge
(1) Check the refrigerant charge.
A.Run the engine at 1500rpm
B. Set the air conditioning system in the coldest for 5 minutes.
C. Check sight glass for clear sight or cloudy.
Caution
If the air conditioning system is operated without being charged, The lubrication in
the compressor can cause damage.
(1) Check the refrigerant with receive drier sight glass
Bubbles or foam visible Trouble shoot
●
●●
● Bubbles flow and
refrigerant gas
disappeared like a fog
flows
● Deficient of refrigerant
Replenish
● Nothing different temperature
between H.L pipe
●
●●
● High pressure of the pressure
gauge needle indicates low pressure
Abnormal
●
●●
● Same bubble appeared
occasionally
(1~2 sec. gap)
● Replenish the refrigerant
● High pressure pipe is hot and low
pressure pipe is a little cool.
●
●●
● H.L pressure of the pressure gauge
needle indicates low pressure.
Abnormal
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