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TM 9-4120-367-14
TM 07592B-14/1
6.1 PRESSURE TEST. - Continued
Table 6-1. Normal Temperature - Pressure Relationships
NOTE: Dry bulb temperatures are measured with an ordinary thermometer.
Table 6-2. Excessive Head and Suction Pressure
Possible Cause
1. Unit overcharged.
2. Restricted condenser air.
3. Air in system.
NOTE
It maybe necessary to release en-
tire charge and then recharge sys-
tem.
Remedy
1.
2.
3.
Purge excess refrigerant.
Check for free airflow.
a. Check condenser louver adjustment.
b. Check for any restrictions to airflow.
c. Check operation actuating cylinder.
d. Condenser fan or motor needs repair or
replacement.
Check for leaks on suction side.
frigerant, and check operation.
Release re-
6-4
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