Customer reported condenser breaker tripping after about 15 minutes of run time. Checked both inverter and compressor windings and found no issues. Checked all 230 voltage connections between condenser and breaker and found connections at 50 amp circuit breaker both very loose and barely making connection. This can cause a breaker to trip. Tightened all 230 volt connections and tested heatpump for 17 minutes. System ran with no issues.