Description
Drive is not detecting enough current on the fan circuit to prove it is in fact running.
Expected Operation
Unit should continue to run unless high or low pressure switch shut unit down.
Cause
1. Incorrect fan model data is loaded into the UODC controller.
2. Fan motor is disconnected or has wiring damage.
3. Fan motor is damaged (e.g. winding resistance is out of tolerance or bearing failure).
4. Compressor drive is damaged.
Solution
1. Using the EcoNet Contractor App, reload model data to the unit. If a new fan or compressor has been added, be sure to input the new part number as necessary.
2. Check wiring between fan motor and inverter drive. Make sure wires are connected and have no visible missing insulation and that connectors are fully seated to plug housing and plug housing is fully seated to control. If necessary, replace wire assembly.
3. Check fan motor winding resistance. Replace fan motor if any windings are shorted to each other or to ground or if any winding has an open circuit.
4. If fan motor and wiring is OK, replace invert drive controller.