E93.1001EN.C Manual CD
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106
Display message
F8
F a i
l e d
b u r n e r
s t a r t
p u m p
o n
9 9 9 , 5
h r s
Reason
Water heater not operational after four starting attempts.
Cause:
No spark.
Corrective action:
Check the ignitor/ignition electrode and replace/clean if necessary.
Check the state of the ceramic insulator. A small crack can prevent the spark to form at
the end of the electrode.
Check the distance between the electrode pin, earth pin and burner.
Check the state of the ignition cable and replace if necessary.
Check the state of the earth wire/connection of the ignitor and replace if necessary.
Check the state of the sparkplug cap and replace if necessary.
Check power supply. Voltage must be 230 Vac nom.
Check for proper electrical grounding of unit.
Bad ignition transformer. Replace the burner control of the unit.
Cause:
Ignition spark is present, but no flame results.
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 ignitor/ignition electrode and replace/clean 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 if necessary.
Check the state of the earth wire/connection of the ignitor and replace 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 if necessary.
Display message
F10
F a l s e
f
l a m e
s i g n a l
p u m p
o n
9 9 9 , 5
h r s
Reason
Flame signal detected, while water heater should not fire
for operation.
Cause:
The flame detection circuit detects a flame which is not supposed to be present.
Corrective action:
Check the ignition/ionisation electrode and make sure it is clean (or replace it).
Check the power supply voltage for a correct polarity.
Check the power supply for bad frequency or voltage peaks.
Check external wiring for voltage feedback.
Check the internal wiring for bad connections.
Check if the gas valve is closing correctly.
Replace the burner control.
