5-43
MAINTENANCE
Check list for refrigerant volume
Air conditioner Normal Abnormal
High/low
pressure pipe
temperature
High pressure
pipe is hot (80 to
120°C or 176 to
248°F), low
pressure pipe is
cold (8 to 15°C
or 46 to 59°F).
Clear difference
in temperature
between the
pipes.
High pressure
pipe is warm, low
pressure pipe is
slightly cool. No
significant
difference in
temperature
between the
pipes.
Little difference in
temperature
between the
high-pressure
pipe and the low-
pressure pipe.
High pressure
pipe is hot, low
pressure pipe is
slightly cool. A
significant
difference in
temperature
between the
pipes.
Pipe connection Normal Some places are
dirty with oil.
Some places are
extremely dirty
with oil.
Normal
Sight glass
Almost
transparent with
some bubbles.
Fully transparent
when the engine
speed is
increased or
decreased.
Flow of bubbles
can be seen
constantly.
Sometimes
transparent or
white with
bubbles.
Mist-like flow is
faintly visible.
No bubbles is
visible, even
when the fan is
set to High and
the engine is
idling.
Refrigerant level Proper level Refrigerant may
be leaking.
Refrigerant has
leaked; little is
left.
Refrigerant level
too high
EVERY 250 HOURS
If the air conditioner is not working
If the air conditioner does not work well, set the fan switch to OFF and contact your sales or
service dealer for inspection and/or repairs.
IMPORTANT: Continued use of the air conditioner when it is not working properly will
damage its various parts.
IMPORTANT: Using the air conditioner when there is no refrigerant will damage the
compressor.
IMPORTANT: Always consult your sales or service dealer for replacing the refrigerant.
Be sure to use R134a refrigerant (660 to 740 g or 1.45 to 1.63 lb.).
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