Carrier · 30XA/XAS/XB/XBP/XW Chillers
Free cooling operation on circuit B has failed. Circuit B will shut down, but free cooling can restart after 30 minutes. This may be due to a refrigerant pump fault.
Click steps to track your progress.
Verify the refrigerant pump is functioning correctly.
Check the wiring for circuit B related to free cooling.
Contact Carrier Service if free cooling operation does not resume.