What exactly is your problem? You get er 50 once you start the unit? We at Airbulance would love to help you. We offer ac installation to 24 7 Air Conditioner Repair.
You can be a parts changer or you can acquire a voltage meter. Sounds like a stuck relay, likely on the board which means new board but if a motor needs 48 volts to run and is only getting 26 it's not going to work. Best Wishes!! If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79
Turn breaker completely off and then back on. Also check the disconnect. Just because the breaker is on does not mean it has voltage, you need a meter! If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79