Takeuchi TB285 Operator's Manual page 179

MAINTENANCE
every 250 hourS
Check list for refrigerant volume
Air conditioner
High/low
pressure pipe
temperature
Pipe connection Normal
Sight glass
Refrigerant level Proper level
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.
IIMPORTANT: Always consult your sales or service dealer for replacing the refrigerant.
Be sure to use R134a refrigerant (740 to 820 g or 1.72 to 1.81 lb.).
Normal
High pressure
High pressure
pipe is hot (80 to pipe is warm, low
120°C or 176 to pressure pipe is
248°F), low slightly cool. No
pressure pipe is significant
cold (8 to 15°C difference in
or 46 to 59°F). temperature
Clear difference between the
in temperature pipes.
between the
pipes.
Some places are
dirty with oil.
Almost Flow of bubbles
transparent with
can be seen
some bubbles. constantly.
Fully transparent Sometimes
when the engine transparent or
speed is white with
increased or bubbles.
decreased.
Refrigerant may
be leaking.
Abnormal
Little difference in
temperature
between the
high-pressure
pipe and the low-
pressure pipe.
Some places are
extremely dirty
with oil.
Mist-like flow is
faintly visible.
Refrigerant has
leaked; little is
left.
5-43
High pressure
pipe is hot, low
pressure pipe is
slightly cool. A
significant
difference in
temperature
between the
pipes.
Normal
No bubbles is
visible, even
when the fan is
set to High and
the engine is
idling.
Refrigerant level
too high