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11.3
Faults that are not displayed
Appliance faults
Combustion noises too loud; rumbling noises
Flow noises
Heat-up takes too long
Flue gas values incorrect; CO content too high
Delayed ignition, poor ignition
Condensate in air box
No hot water.
DHW volume is not reached
No function, the display remains dark
Table 35 Faults that are not shown on the display
Greenstar 1000 – 6721835943 (2023/08)
Remedy
▶ Check O
setting.
2
▶ Check pollution Hex.
▶ Check flue integrity.
▶ Check the gas type.
▶ Check the gas supply pressure.
▶ Check the flue system; clean or repair if required.
▶ Check the gas/air ratio.
▶ Check the ratio control valve; replace if required.
▶ Check condense drain is clear.
▶ Set the pump rate or pump characteristic map correctly and match to the maximum
output.
▶ Set the pump rate or pump characteristic map correctly and match to the maximum
output.
▶ Check system is balanced.
▶ Check anti-cycle time.
▶ Check the gas type.
▶ Check O
setting.
2
▶ Check the gas supply pressure.
▶ Check the flue system; clean or repair if required.
▶ Check the gas/air ratio.
▶ Check the ratio control valve; replace if required.
▶ Check gaskets/seals (re-circulation).
▶ Check tightness flue gas and gas circuit.
▶ Check air way.
▶ Check the ignition transformer function for misfiring in Menu 6, replace if required.
▶ Check the gas type.
▶ Check the gas supply pressure.
▶ Check operation of meter governor.
▶ Check the power supply.
▶ Check the electrodes; replace if required.
▶ Check the flue system; clean or repair if required.
▶ Check the gas/air ratio.
▶ Check the burner, replace if required.
▶ Check the air/gas ratio control valve; replace if required.
▶ Check the back flow prevention valve in the air/gas manifold, replace if required.
▶ Check leaking flue gas.
▶ Check connection rain guard.
▶ Check air vent leaking
▶ Check the turbine, replace if required.
▶ Check diverter valve
▶ Check for cross-piping.
▶ Check the plate heat exchanger.
▶ Check flow device.
▶ Check silencer body.
▶ Check the electrical wiring for damage.
▶ Replace defective cables.
▶ Check the fuse, replace if required.
Fault finding and diagnosis
95
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