| Topside Controls Troubleshooting Section |
| No message or lights on control panel Possible Causes Can Include: Topside panel not plugged in. Check connection point to make sure connection is tight. Wrong topside control panel. Make sure topside is common to equipment being controlled. Topside control panel wire is damaged. Check entire wire for damage. Rodents only need to bite the wire to make the topside defective. Replace topside if necessary. Topside control has no power. Make sure incoming power is correct to spa. Plug in known good topside. If new topside works, replace topside. If not, check transformer. If transformer is good, replace circuit board. Numbers are missing or blank Check to make sure connection is clean, moisture and dirt will create problems with the readout. Clean them carefully and re-plug topside back in. Can’t read control panel at night If topside has backlights, they may be burned out and need to be replaced. Readout flickers during operation Check for voltage problems, especially low voltage |