10.8 Sight glass
It can judge the circulating amount of refrigerant and
existence of water in the refrigerant.
If the refrigerant is short, repair the leaking place and
then charge gas.
How to determine existence of water:
Color of a color-check
In case of yellow color, it in necessary to vacuum and
replace the dryer.
10.9 Dryer
Moisture and foreign materials are eliminated from the
refrigerant. If the desiccant (molecular sieve) in the
dryer can not remove moisture (the check color of the
sight glass becomes yellow), replace the dryer
assembly. Also if inside of the dryer is clogged during
operation, there will be a difference in temperature
between the inlet and the outlet, and the outlet side
becomes cool.
When the dryer is replaced, replace it quickly. Here,
when installing the dryer, pay heed to its direction and
install it on the unit with the arrow mark aligned to the
flow of the refrigerant.
10.10 Condenser fan motor
Remarks: The brush can not be replaced
– 16 –
Dryer
Revolution
2100min
-1
Electric current
3.2A
Input
70W
Condenser fan motor
Sight glass
Green
Light green
Yellow
Judgment
Normal
Rather
abnormal
Abnormal
Moisture amount
Refrigerant
temperature 24°C
Refrigerant
temperature 38°C
15 ppm or less
15 ~90 ppm
90 ppm or more
30 ppm or less
30 ~140 ppm
140 ppm or more
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