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3. Check and remedy of poor cooling
Symptoms
ڹ Many bubbles
through sight
glass
ں Be frosted
in evaporator
ڻ Be frosted from
inlet of eva. to
distributor of
exp. V/A
Causes & Check
Poor refrigerant
Be clogged in dryer.
Trouble of expansion valve
Air filter is clogged.
Weak air EVA. fin is clogged.
flow Much dusts on cooler fan
Duct leakage
Heat load in low inside of room.
Same as symptom ڹ
Remedy & Repair
Dischage the refrigerant properly.
If clogged so often, chage it.
Turn the adjust nut of exp. V/A one or twice
and see the low press. gauge. In case that
no chage in gauge due to traubled exp. V/A,
change it.
If change in, open to 50 of over heat degree.
Cleaning.
Clean the fin.
Disassemble & clean pay attention to the
change of balance weight.
Adjust the leaking part.
Check the setting temp. of temp. control S/W.
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