How to Fix / Troubleshooting

Safety: Isolate power before removing covers.

Clean vents: Vacuum dust from the Certikin inverter/controller cooling slots and ensure there is at least the recommended clearance around the unit.
Check cooling fan: If fitted, confirm the internal fan runs when the pump is operating. Replace if seized or noisy.
Improve ventilation: Provide additional ventilation or forced air in the plant room if temperatures are high, especially in summer.
Reduce load temporarily: Run the pump at a lower speed until permanent cooling improvements are made.

Persistent E13 faults after cleaning and fan replacement indicate a failing inverter module that may need replacement.

Controller shows E13 and pump speed is limited; alarm often logged as 'Overtemperature – Heatsink'.

Possible Causes