Problem:
WSHP Variable Speed Fan will not Start 460 Volt
Resolution:
With 460 Volt Incoming power, a dedicated Neutral wire is required to supply 277 Volt power to the fan motor. This does not mean one leg of 460 and ground, but a dedicated Neutral 4 power wire hook up. If not wired in this manor, or 460 volts applied to the ECM module, the ECM module will be blown and will need to be replaced.
Notes:
ECM modules can be ordered through Trane Parts.