We have a Mitsubishi Zuba heat pump. Approx 3ton. Consists of Mitsu outdoor unit married to ADP air handler and controlled by Honeywell VisionPro tstat.
The system works well for both heating and cooling. However, I have noticed that at times, the outdoor unit will start up and only run for a very short time - maybe 15sec, then shut down again.
Would that be normal?