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Burner Control CBR
Fault displayed on CBR by flashing red LED and following fault Code:
Fault Display Fault / Cause Check / Resolution
F 6
Faulty optional
Proof of Closure Switch
(POC)
Main gas valve is not closing;
Main gas valve defective; Proof of closure
switch defective;
Check electrical connections.
Incorrect configuration of CBR
F 8
Pressure switch air 3 (optional)
E.g. radiant tube pressure switch.:
Exhaust valve not closing;
Exhaust pressure (negative) deviates from
pressure curve;
Pressure switch defective; Threshold of
delta-p switch selected too low → lower
setting; Moisture in pressure switch?
F a
False flame signal detected by the UV-
probe during start-up
(similar to
F A6
)
Unusually long residual flare after burner
has turned off e.g. gas valve leakage; UV-
probe defective or aged
Burner internals defective?
Ground connection of Ionization
electrode?
Air purge orifices in the gas head plugged
→ clean
F
Safety interlock open
(similar to
F A2
)
Upstream combustion safety devices are
not on line; Burners are not permitted to
operate
Check the limits and permissives
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