Part 5 – Diagnosis and Troubleshooting
5.6 E0, E8 Troubleshooting
Digital display output
Procedure
E0: Water flow malfunction(after 3
times E8)
E8: Water flow malfunction
Water flow switch connection on main
PCB is loose
1
Ensure the switch is connected properly
Water flow is insufficient
Check the water piping and valves. Make
sure the water piping is clean, there is no
air in the water piping and all valves are
open.
Water flow switch is damaged
Replace the water flow switch
Replace hydronic system PCB
Note:
2. Water flow switch connection is port CN16 on the refrigerant system PCB
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