General System Condition - Low Refrigerant Charge

General System Condition - Low Refrigerant Charge:

KEY: POOR COOLING AT HIGHER AMBIENTS.

THEN: System is operating with a low charge.
^ Confirm by touching the suction and discharge pipes at the compressor. Suction pipe will be cool to warm and discharge pipe will be warm to hot.
^ Pipe temperatures will vary with ambient air temperature and the amount of charge lost. Suction and outlet temperatures will be warmer as more refrigerant is lost or ambient air temperature increases.
^ Leak test all components and connections.
^ If refrigerant charge level os unknown, reclaim evacuate and recharge system with 0.68 kg (1.50 lbs.) or R-134a.
^ Run another performance test.