- Lack on the power supply.
⇒Verify the network voltage and/or the integrity of the fuse on the electronic card of the control and the rightness of the electrical connections (only qualified personnel).
- Set – Point reached.
⇒Check the control setting.
- In presence of WS (minimum water temperature thermostat), hot water temperature < 35°C, insufficient water flow and/or temperature in coil, or damaged water sensor (WS).
⇒Check the water temperature and water flow on the coil and/or the correct working of the water sensor – WS (only qualified personnel).
- Burnt autotransformer and/or electric fan damaged.
⇒Replace the damaged components (only qualified personnel).
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