Strebel S-CB Px 120, Installation Operating & Maintenance Manual

Page: 93 / 118

S-CB Px 120 Manual 93
F8
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Cause:
Ignition spark, but no flame.
Corrective action:
Check if all gas valves in the supply line are completely open.
Check if there is no air in the gas supply (start-up new systems).
Check if the gas valve opens. When there is power supply to the gas valve, but the valve
does not open, the gas valve must be replaced.
Check if the gas valve opens. When there is no power supply to the gas valve check the
gas valve wiring/connections.
Check if the gas valve settings are correct and adjust if necessary.
Check if the gas pressure is correct and sufficient.
Check if the air supply is open/not blocked.
Cause:
Flame, but not enough ionisation to establish the flame.
Corrective action:
Check the igniter/ignition electrode and replace/clean it if necessary.
Check the state of the ceramic insulator.
Check the distance between the electrode pin, earth pin and burner.
Check the state of the ignition wire (also the ionisation wire) and replace it if necessary.
Check the state of the earth wire/connection of the igniter and replace it if necessary.
Check for proper electrical grounding of unit.
Check power supply. Voltage must be 230 Vac nom.
Check the state of the sparkplug cap and replace it if necessary.
Display message
F9
F l a m e l o s t
p u m p o n 9 9 9 , 5 h r s
Reason Flame signal lost during operation.
Cause:
Bad gas supply pressure.
Corrective action:
Be aware that the specified gas pressure must be met during all operation conditions.
Check if all gas valves in the supply line are completely open.
Check if the dirt filters mesh in the gas valve inlet is clean.
Check if the external dirt filter in the gas supply line is not blocked.
Check if an external gas pressure regulator is selected/installed correctly.
Check the gas pressure that is supplied to the building > call the supplier if necessary.
Cause:
Bad gas valve or gas valve settings.
Corrective action:
Check and set gas valve settings.
Cause:
Bad electrode, electrode wiring/connection (bad ionisation signal).
Corrective action:
Check ionisation signal.
Check the igniter/ignition electrode and replace/clean it if necessary.
Check the state of the ceramic insulator.
Check the distance between the electrode pin, earth pin and burner.
Check the state of the ignition wire (is also ionisation wire), and replace if necessary
Check the state of the igniter earth wire/connection and replace it if necessary.
Check for proper electrical grounding of unit.