I was at a school today that has about 70 of these boxes. Four of them have a AS-VAV111-1 controller. Its control transformer fuse 2.5amps was blown. I checked for shorts to ground found nothing. Replaced fuse and they started up. Each box has its own transformer incase anyone is wondering.
I watched the actuator for the HW coil travel and watched the travel of the damper actuator. Fuse still did not pop.
Is this common?
What should i be looking for?
I noticed on one VAV the AS-VAV111-1 LED was on continuous no flickering?
Any help is appreciated.