คำตอบที่ 139
ระบบ A/C หากเราไม่ได้เปลี่ยนอุปกรณ์อะไรในระบบ เติม Refrigerant oil สัก 30 ml. และชาร์จน้ำยา R-134a ไม่เกิน 6 ขีด (0.567 kg.) ไม่ได้โม้ .. ไม่ได้คิดเองด้วยอ่ะปืน 
REFRIGERANT CHARGE CAPACITY
The R-134a system charge capacity is 0.567 kg
(1.25 lbs.).
REFRIGERANT OIL LEVEL
When an air conditioning system is assembled at
the factory, all components (except the compressor)
are refrigerant oil free. After the system has been
charged and operated, the oil in the compressor is
dispersed through the refrigerant system. The accu-
mulator, evaporator, condenser, and compressor will
retain a significant amount of oil.
It is important to have the correct amount of oil in
the refrigerant system. This will ensure proper lubrication
of the compressor. Too little oil will result in
damage to the compressor. Too much oil will reduce
the cooling capacity of the system.
It will not be necessary to check the oil level in the
compressor or to add oil, unless there has been an oil
loss. This may be due to a rupture or leak from a
refrigerant line, a compressor shaft seal, an evaporator,
or a condenser. If a rupture occurs, add 30 milliliters
(1 fluid ounce) of oil to the system after the
repair has been made. Oil loss at a leak point will be
evident by the presence of a wet, shiny surface
around the leak.
Refrigerant oil must be added when a accumulator,
evaporator, or condenser are replaced. Refer to the
Refrigerant Oil Capacities chart. When a compressor
is replaced, the oil must be drained from the old compressor
and measured. Drain all the oil from the new
compressor, then fill the new compressor with the
same amount of oil that was drained out of the old
compressor.
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