Hi all,
I have a TEC wich is one of 12 controllers serving chilled water fan coil units with electric heat
All have common power supply and all on the same FLN
The TEC in question is showing failed points every morning and upon rest operates fine for the day. I have been able to determine the time of fault and every time it appears to be just before midnight when the scheduler shuts all the plant off for the night
It would appear from the outside the TEC is not returning from a power failure or FLN failure
Action so far:
Replaced TEC with brand new controller, readdressed set application, checked all settings against other controllers - still fails
Gave TEC its own power supply - still fails
seperateed FLN from other TEC and ran direct to MBC - still fails
Not sure what else to try - any suggestions