On vacation this week get called in for no heat. No one on can seam to figure out why this one RTU can not supply enough heat. Checked on BAS system and see unit is only running at .25 pressure set point is 1.50. Ask crew on did anyone notice that the unit wasn't running right since the 23th and today is the 26th (WTF). Go up and find one VFD reading 100% and other with phase lost code. Open up control panel and get that something has burned smell. Find burned up contactor and wires burned back.