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 TM 9-4120-425-14&P
REFRIGERATION SYSTEM SERVICING (CHARGING) - Continued
0054-00
SERVICE CHARGING - Continued
13. After 15 minutes, observe the liquid sight indicator (sight glass) on left rear of unit.
a.
Green center means the refrigerant moisture content is acceptable.
b.
Yellow center means there is too much moisture in the system. It must be discharged, evacuated and charged
again.
c.
Milky white or bubbly liquid means the system has a low charge.
d.
Clear bubble-free liquid around the center means the system is fully charged.
14. If charge is low, add more gas refrigerant.
a.
Open cylinder valve and the manifold low pressure valve.
15. Check air conditioner for proper cooling. There should be at least a 15F temperature difference between evaporator
discharge air and intake air. Turn mode selector switch to OFF.
16. Remove charging manifold hoses.
17. Install service valve protective caps.
18. Secure service valve access cover using four screws.
0054-00-4
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