39
Bentone B 30/B 40 J/K
Control sequence under fault conditions and lockout indication
Whenever a fault occurs, the sequence switch stops and with it the lockout
indicator. The symbol appearing above the reading mark indicates the type
of fault:
No start • One of the contacts is not closed (also refer to «Preconditions for burner
startup»)
• Extraneous light:
Lockout during or after completion of the control program
Examples:
– Nonextinguished flame
– Leaking fuel valves
– Faulty flame supervision circuit
Interruption of
startup sequence
• No «OPEN» signal at terminal 8 from the changeover end switch «a»
• Terminals 6, 7 and 15 are live until fault has been corrected
P Lockout
Does not apply to LAL1...:
• No air pressure indication at the beginning of the air pressure check
• Air pressure failure after the air pressure check
Lockout • Defect in the flame supervision circuit
Interruption of
startup sequence
• No positioning signal at terminal 8 from the auxiliary switch «m» for the low-
fire posi-tion
• Terminals 6, 7 and 15 are live until fault has been corrected
1 Lockout • No flame signal at the end of the safety time «TSA»
l Lockout • Flame signal has been lost during operation
Burner control can immediately be reset after lockout:
– Do not press the lockout reset button for more than 10 seconds
The sequence switch always travels to the start position first
– After resetting
– After rectification of a fault that led to shutdown
– After each power failure
During this period of time, power is only fed to terminals 7 and 9...11.
Then, the LAL.... will program a new burner startup sequence
Locout indicator a-b Startup sequence
b-b´ Idle steps
(with no contact confirmation)
b (b´)-a Postpurge program
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