Check to be sure that both indoor and outdoor fans are running, as is the compressor. examine the tubing for any signs of a leak, or faulty shrader valves (look similar to tire valve, but metal) the indoor unit can run even without the outdoor unit, check all breakers and disconnects. too many possibilities to diagnose on this limited description, sorry
Answers & Comments
Check to be sure that both indoor and outdoor fans are running, as is the compressor. examine the tubing for any signs of a leak, or faulty shrader valves (look similar to tire valve, but metal) the indoor unit can run even without the outdoor unit, check all breakers and disconnects.
too many possibilities to diagnose on this limited description, sorry