Hayward HydroRite UVO3 Troubleshooting Manual page 34

2. Display Not Lit (cont.)
There are two voltage selector plugs: the one located on the main (green) board,
should be set to 230V and the one on the interconnect (blue) board, should be set to
115V. If either of these are incorrect, fuses on the corresponding board may blow.
Test the 1A Fuse (Main Board)
Verify Voltage Selectors (main)
Step 2C
Step 2D
On the main board (green), test the 1A fuse to the far On the main board, verify the voltage selector is set to
right. IF the fuse is blown, proceed to step 2D. IF the 230V*. Once confirmed, replace the blown fuse (CAX-
fuse passes a continuity test, then replace the main 20101) & retest. IF fuse immediately fails again, replace
board (HYXSPCBA). the main board (HYXSPCBA).
*NOTE: IF the voltage selector is covered by the following
label, DO NOT remove the label & consider the voltage
selector confirmed.
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