There is no water circulating/water is not pumping
Problem:
If your water isn't circulating, or the pump isn't turning on, The issue here is most likely that there is air in the hoses. This prevents the water from flowing properly to the pump, to start the water circulation.
Solution:To release the air from the hose, slowly begin to unscrew the hose from the water pump. Within a few seconds you will the water beginning to flow from the pump through to the chiller. Once you see water flowing from the water pump to the hose, tighten the connection point again.
Please find an instructional video here