Earlier today I was trying to get a Trane RTU to start in test mode. Simple enough, just jump LTB 1 and LTB 2 and sit back and wait. The only problem is that it just got stuck in step 1 (the blower or something--can't recall) for 10 or 15 minutes before I gave up. The compressors never energized. I tried the test in two different ways:
1) Turn power off, put jumpers on, turn power back on and wait for test mode to start
2) Turn power off, turn power back on, then put jumpers on and wait for test mode
Neither way seemed to knock any sense into the thing. I got it to work on two other Trane units earlier in the day, maybe I was just tired Am I missing something?