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11.4 Troubleshooting: No hot water |
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No hot water |
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Symptom | Cause | Solution | Remark |
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No attempt to start | No supply voltage | 1. | Check if the isolator is ON. | See the BFM electrical diagram (14 "Electrical diagram") |
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heating cycle | present | 2. | Check whether there is power to the isolator | If the error cannot be rectified, contact your installation engineer |
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| 3. | Check whether there is power to the electrical connector block |
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| 4. | Check whether there is power to the burner control |
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| 5. | Check fuse in the burner control |
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| The measured voltage must be 230 VAC |
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No attempt to start | Pressure switch not | 1. | Blockage in the chimney flue or air supply | Once the error is rectified, the appliance will automatically start up |
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heating cycle (blocking | closing |
| - | Trace the blockage | if there is a heat demand |
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error) |
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| If the error cannot be resolved or is persistent, contact your |
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| - | Remove the blockage |
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| 2. | Defective pressure switch |
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| - Check the wiring of the pressure switch |
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| - Check that the pressure switch is working |
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| Failure in the | 1. | Check whether the control thermostat is switched (closed) |
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| thermostat circuit | 2. | Check leads and sensors of the control and |
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| thermostats |
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Repetitive starting of | Too much resistance in | 1. | Check whether the chimney flue configuration (3.9 "Air supply | If the error cannot be resolved or is persistent, contact your |
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the heating cycle | the chimney flue (the |
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(cycling of the | pressure switch opens |
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appliance) | during heating) |
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Instruction manual BFM | 60 |
