CHARGING THE REFRIGERANT SYSTEM.-Continued

TM5-4120-383-14

5-16.

CHARGING THE REFRIGERANT SYSTEM.Continued

Run air conditioner in COOL mode (with temperature control

in coolest position) for 15 minutes.

Do not skip the next step.

u. After 15 minutes, observe sight glass on back of condenser

Be sure that the refrigeration system is not in bypass.

section.

When system goes into bypass bubbles will appear in the sight

glass.

Green center means refrigerant moisture content is

acceptable.

Yellow center means there is too much moisture in system.

It must be discharged, evacuated, and charged again.

Milky white or bubbly liquid means system has a low

charge.

Clean bubble-free liquid around center means the system is

fully charged.

If charge is low add gas refrigerant.

(1) Be sure drum is switched to gas position. Open drum

valve.

(2) Continue to charge until sight glass is clean and bubble-

free.

(3) Close low pressure air conditioner charging valve and

refrigerant drum valve.

Turn MODE SELECTOR switch to OFF.

Check that high and low pressure air conditioner charging

valves are closed and remove charging manifold hoses.

Install charging valve access cover.

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