Since you have a three wire pump there are a lot of tests you can perform at the surface. Check Franklin motors website and download the appropriate troubleshooting section for an ammeter and Ohmmeter. Capacitors usually blow from too many cycles or a relay that leaves them "on" too long. Testing will tell you pretty quick if your motor is frozen up.
You have a lot of issues about cycling and pump sizing with a water heat pump that others here can fill you in on.