Carrier · 30XA/XAS/XB/XBP/XW Chillers
The sensor for condenser subcooling liquid temperature on circuit B has a fault. The unit will return to air-cooled mode.
Click steps to track your progress.
Inspect the wiring connections for the circuit B condenser subcooling liquid thermistor.
Examine the thermistor for physical damage.
Contact Carrier Service if the unit does not resume air-cooled operation.