Inspection Of Refrigerant Volume

1. RUN ENGINE AT APPROX. 2000 RPM

2. OPERATE AIR CONDITIONER AT MAXIMUM

COOLING FOR A FEW MINUTES

3. CHECK AMOUNT OF REFRIGERANT

Observe the sight glass on the receiver.

Item

Symptom

Amount. of refrigerant

Remedy

1

Bubbles present in sight glass

Insufficient*

(1) Check for gas leakage with gas leak tester and repair if necessary

(2) Add refrigerant until bubbles disappear

2

No bubbles present in sight glass

None, sufficient or too much

Refer to items 3 and 4.

3

No temperature difference between compressor inlet and outlet

Empty or nearly empty

(1) Check for gas leakage with gas leak tester and repair if necessary

(2) Add refrigerant until bubbles disappear

4

Temperature between compressor inlet and outlet is noticeably different

Proper or too much

Refer to items 5 and 6

6

Immediately after air conditioner is turned off, refrigerant in sight glass stays clear

(2) Evacuate air and charge proper amount of purified refrigerant

$

When air conditioner is turned off, refrigerant foams and then stay clear

Proper

*: Bubbles in the sight glass with ambient temperatures higher can be considered normal if cooling is sufficient

*: Bubbles in the sight glass with ambient temperatures higher can be considered normal if cooling is sufficient

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