Hayward HydroRite UVO3 Troubleshooting Manual page 39

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3. 'FLO' Appears on Display

The 'FLO' error message appears when either: flow is not detected by the flow switch

OR the interlock sensor is reporting that the vessel cover is open, make sure the pump

is on and the cover is secure before proceeding.

Verify Main Pump is On

Check the Flow Rate

Step 3A

Step 3B

15GPM

(MIN)

Verify the main pump is running & the vessel is not

Verify that the flow rate is at least 15 gallons per

bypassed. IF OFF, turn the pump on and wait 3 minutes

minute*. IF lower than 15GPM, increase the flow rate

before checking again. After 3 minutes, IF the error still

& retest after 3 minutes. IF the flow rate is greater than

appears, proceed to step 3B.

15GPM, go to step 3C.

*NOTE: 15GPM is enough to satisfy the flow switch requirement, but not enough for

Ozone infusion, which requires 38GPM minimum.

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