Note: All electrical work must be carried out by a licensed electrician. Any electrical information included here, whether it is troubleshooting or other instructions, are provided for use by a licensed electrician only. Local electrical codes supersede any information found here.
If you need to do a quick test to check the power connection, it's okay to turn an empty spa on. You can unplug the circulation pump if you opt to, but not totally required. Spa will go into ER 3 if the circulation pump is plugged.