13
BURNER FAULT INDICATIONS
Control program fault conditions and lock-out indication
Whenever a fault occurs, the sequence switch stops and with it the lock-out indicator.
The symbol above the reading mark of the indicator gives the type of fault:
No start
One of the contacts has not closed
- Air damper opened.
The limit switch (blue cam) for the closed position do not
supply voltage from terminal 11 to terminal 8.
- The contact of the limit thermostat or any other switching
devices in the control loop of terminal 4 to terminal 5 are
opened.
Extraneous light
Lock-out during or after completion of the control program
Examples:
– Flame not extinguished
– Leaking fuel valves
– Faulty flame supervision circuit
Interruption of start-up sequence
OPEN signal of changeover limit switch (red cam) has not been delivered to terminal 8
Terminals 6, 7 and 15 remain under voltage until fault has been corrected
Lock-out
Defect in the flame supervision circuit, faulty flame signal,
extraneous light
Interruption of start-up sequence
Position signal of auxiliary switch (orange cam) for the low
flame position has not been delivered to terminal 8
Terminals 6, 7 and 15 remain under voltage until fault has
been corrected
Lock-out
No flame signal is present on completion of the safety time
Lock-out
Flame signal has been lost during operation
In the event of a burner lockout, more than two
consecutive burner reset operations could cause
damage to the installation. On the third lockout,
contact the Aftersales Service.
If further lockouts or burner faults occur, interven-
tions must only be made by qualified, authorised
personnel (as indicated in this manual, and in
compliance with the laws and regulations current-
ly in force).
1
WARNING
DANGER
Summary of Contents for 9511300
Page 2: ...Original instructions...
