E9 and button reset and fault indicator LED are flashing. Safety temperature circuit has tripped.
Step | Check | Action | |
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1. | Type of CH system: Is the appliance installed in a fully pumped sealed system? | yes: | go to step 3 |
no: | go to step 2 | ||
2. | Open vented CH system: Is there enough water in the feed and expansion tank? | yes: | go to step 4 |
no: | ▶ Top up system. ▶ Vent appliance. ▶ Press the reset button for 3 seconds and release it. After releasing the appliance re-starts. E9? go to step 4 |
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3. | Fully pumped sealed systems: Is the heating pressure between 1 and 2 bar? | yes: | go to step 4 |
no: | ▶ Top up system. ▶ Vent appliance. ▶ Press the reset button for 3 seconds and release it. After releasing the appliance re-starts. E9? go to step 4 |
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4. | Is the pump seized? | yes: | ▶ Free/release the pump. If pump won’t start: ▶ Switch OFF the appliance. ▶ Disconnect the boiler power connection. ▶ Drain appliance. ▶ Change the pump (see Installation Instructions). ▶ Fill system, vent and re-pressurise (see installation instructions). ▶ Reconnect the appliance power connection. ▶ Switch ON the appliance. ▶ Press the reset button for 3 seconds and release it. After releasing the appliance re-starts. E9? go to step 5 |
no: | go to step 5 | ||
5. | Lead disconnected from flue safety temperature limiter and/or CH flow safety temperature limiter? | yes: | ▶ Switch OFF the appliance. ▶ Reconnect lead. ▶ Switch ON the appliance. ▶ Press the reset button for 3 seconds and release it. After releasing the appliance re-starts. E9? go to step 4 |
no: | go to step 4 | ||
6. | ▶ Switch OFF the appliance. ▶ Un-plug the connector from the flue safety temperature limiter. ▶ Measure the flue safety temperature limiter for continuity. Resistance small? | yes: | ▶ Connect flue gas safety temperature limiter lead. go to step 5 |
no: | ▶ Change the flue safety temperature limiter. ▶ Connect flue gas safety temperature limiter lead. ▶ Switch ON the appliance. ▶ Press the reset button for 3 seconds and release it. After releasing the appliance re-starts. E9? go to step 5 |
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7. | ▶ Disconnect lead to CH flow safety temperature limiter. ▶ Measure the CH flow safety temperature limiter for continuity. Resistance small? | yes: | ▶ Connect CH flow safety temperature limiter. go to step 6 |
no: | ▶ Change CH flow safety temperature limiter. ▶ Connect CH flow safety temperature limiter. ▶ Switch ON the appliance. ▶ Press the reset button for 3 seconds and release it. After releasing the appliance re-starts. E9? go to step 6 |
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8. | ▶ Disconnect the boiler power connection. ▶ Unplug connector of harness that connects the limiters to PCB from control board. Test harness (including the two limiters) for continuity. Resistance small? | yes: | ▶ Reconnect connector. go to step 7 |
no: | Harness defective. ▶ Repair or replace the harness. ▶ Reconnect the appliance power connection. ▶ Switch ON the appliance. ▶ Press the reset button for 3 seconds and release it. After releasing the appliance re-starts. E9? go to step 7 |
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9. | ▶ Disconnect the boiler power connection. ▶ Remove fuse SI 3 from appliance PCB control board and test for continuity. Is there continuity? | yes: | ▶ Remount the fuse. ▶ Reconnect the appliance power connection. ▶ Switch ON the appliance. go to step 8 |
no: | ▶ Change the fuse. ▶ Reconnect the appliance power connection. ▶ Switch ON the appliance. ▶ Press the reset button for 3 seconds and release it. After releasing the appliance re-starts. E9? go to step 8 |
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10. | The PCB is damaged. | ▶ Make a note of the altered service settings. ▶ Switch OFF the appliance. ▶ Disconnect the boiler power connection. ▶ Change PCB control board. ▶ Reconnect the appliance power connection. ▶ Switch ON the appliance. ▶ Restore service settings previously noted down. |
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