maintenance guide
Fault finding
Overheat |
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Insufficient | Water pressure |
circulation |
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| Bleed heat exchanger |
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| Pump operation |
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| CH return filter for blockages |
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| Circulation around boiler (blockages) |
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| ntc temperature sensors |
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Insufficient water | Water pressure gauge for correct pressure |
(request filling) |
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| Check for waterleaks on the entire system |
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CH Flow temp. | Check connections and wiring to temp |
probe circuit open/ | sensors |
short circuit |
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CH Flow temp. | Resistance values of temp sensors |
probe circuit open/ |
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short circuit |
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Heating delivery | Details in maintenance guide in installation |
probe problem | manual |
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Floor thermostat | Check terminals TA2 for presence of link |
contact open | wire |
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EEPROM Error | Check the EEPROM connection onto the |
| pcb |
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Communication | Check connection and wiring onto all |
error | devices, main and display pcb |
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Main PCB error |
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Too many (>5) | Identify reason for lockout from table and |
resets in 5 minutes | check for relevant faults |
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No Flame detected | Insufficient working gas pressure |
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1st Ignition failed | Spark electrode/wiring connectors |
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2nd Ignition failed | Ignition electrode/wiring connectors |
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Flame | Spark generator/wiring connectors |
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| Check flue system for correct assembly/ |
| termination |
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| Check earth |
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| Gas valve |
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| CO2 settings |
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| Soft light rate |
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Flame detected | Ignition electrode/wiring connectors |
with gas valve |
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closed |
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| Ignition electrode wiring connection onto |
| main pcb |
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Flame lift | Insufficient working gas pressure |
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| Check flue system for correct assembly/ |
| termination |
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| CO2 settings |
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Thermofuse open | Check wiring and connections to |
| thermofuse |
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| Check integriry of main heat exchanger |
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Fan speed error | Check fan |
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| Check wiring connections from fan to pcb |
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