Hayward HydroRite UVO3 Troubleshooting Manual page 41

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3. 'FLO' Appears on Display (cont.)

IF the 'FLO' error persists despite running the pump and isolating out the interlock

switch, then the inline flow sensor is likely the cause of the error. IF isolating the

interlock switch clears the error, then the problem is related to the interlock circuit.

Replace Flow Switch & Restore

Restore Interlock Switch

Step 3E

Step 3F

Replace the inline flow switch with the new flow

Unplug the new flow switch (used in step 3D) & plug

switch. Then restore the interlock switch connection on

the interlock switch back into the main panel. The

the main panel. Turn the pump back on & wait 3

inline flow switch has been confirmed. Proceed to step

minutes. IF the error still appears, jump to step 3G to

3G to troubleshoot the interlock switch & its cable

troubleshoot the interlock switch.

connections.

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