Arrived at customer's residence and found condenser shut off via disconnect breaker. After starting the system and tesing in cool, noted a fault on the EVC board for the condesate switch circuit. Verified that there was no switch installed and that the circuit was open, indicating the fault should not have occurred at all. Determined that the EVC board is faulty and will need to be replaced. Could not get in contact with Trane technical support while onsite or to bypass the fault for temporary cooling. Will submit parts order for part. Applied customer's coupon.