E13
SPRSUN
Inverter / Compressor Drive Fault
Unit displays E13 and will not start; often appears on inverter-type SPRSUN pool heaters.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Defective inverter PCB, Shorted compressor windings, Overvoltage or undervoltage to inverter, Cooling failure of inverter heat sink
How to Fix / Troubleshooting
Safety first: Inverter circuits contain high voltage even after power is removed. Only trained technicians should service the inverter board. Always disconnect power and wait several minutes for capacitors to discharge.
- Check ventilation: Ensure the inverter compartment vents are not blocked and that the unit is not installed in a confined space without airflow.
- Inspect visually: With power off, remove the electrical cover and look for burnt components, discoloration, or a burnt smell on the inverter PCB.
- Verify supply voltage: Confirm that line voltage is within the specified range for the unit. Large deviations can trigger inverter faults.
- Do not bypass protections: Never attempt to jumper or bypass inverter safety circuits.
- Call a professional: A technician should test compressor insulation, measure inverter outputs, and replace the inverter PCB if necessary.
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Repair Difficulty
Professional Required
5/5
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