Sinclair SCV-EB Series Service Manual page 47

5.4 E0, E8 Troubleshooting
5.4.1 Digital display output
5.4.2 Description
 Water flow failure.
 E0 indicates E8 has displayed 3 times. When an E0 error occurs, a manual system restart is required before the system
can resume operation.
 Heat pump stops running.
 Error code is displayed on the refrigerant system PCB digital tube and user interface.
5.4.3 Procedure
Water flow switch connection on hydro
system PCB is loose
Water flow is insufficient(Check water
pressure on the manometer. If the water
pressure is not > 1 bar, water flow is
Voltage of CN21 of hydro system PCB is
too low
Water flow switch is damaged
Replace hydronic system PCB
Notes:
1. Water flow switch connection is port CN8 on the hydro system PCB.
E0 / E8
1
No
insufficient.)
No
No
No
Yes
Ensure the switch is connected properly
Check the water piping and valves. Make
sure the water piping is clean, there is no
Yes
air in the water piping and all valves are
 Ensure the power supply is 220AC
 Ensure the neutral cable at the
Yes
power input terminal is connected
properly
Yes
Replace the water flow switch
open.
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