Case 4: Moisture In System

Measured pressure
Low-pressure: Below 20 psi
(137 kPa, 1.40 kg/Sq.cm)

High-pressure: Below 88 psi
(608 kPa, 6.20 kg/Sq.cm)

Condition
Intermittent cooling.
(Moisture in refrigeration system freezes in expansion valve and causes temporary blocking. After time, ice melts and condition returns to normal.)




Step 1
Discharge refrigeration system. Refer to operating instructions of your refrigerant recovery/recycling/charging station for proper procedures.

Step 2
Evacuate system to remove all air and moisture from it. Refer to operating instructions of your refrigerant recovery/recycling/charging station for proper procedures.

Step 3
Charge system with refrigerant. Refer to operating instructions of your refrigerant recovery/recycling/charging station for proper procedures.

Step 4
After charging, measure refrigerant pressure. Refer to "Checking Refrigerant Pressure".

Step 5
If low-and high-pressure sides are still too high, replace receiver/drier.