20
6 Fault conditions and procedures for rectification
The burner is found either out of operation, in lockout
(signal lamp shows red) or burner operation is hindered
(signal lamp flashes orange/red or green/red).
If faults occur, check first that the basic requirements for
operation are met.
❏
Is there a supply of electricity?
❏
Is there any fuel oil in the tank?
❏
Are all controllers for room and boiler temperature,
water level interlocks, limit switches etc. set correctly?
If it has been established that the lockout is not due to any
of the above, all the burner functions must be checked.
To avoid damage to the plant, do not reset the
burner more than twice. If the burner locks out
for a third time call for a service engineer.
Fault conditions should be rectified only by
qualified and experienced personnel.
Reset:
with diagnostic code output (see Ch. 5.6):
From onset of lockout wait for error analysis
time of approx. 5 seconds, then press reset
button until the signal lamp switches to orange
(approx. 5 seconds), determine flashing code,
then press reset-button for a further second to
reset.
without diagnostic code output:
Press reset button until the red light goes out
(approx. 1 second).
DANGER
ATTENTION
Condition
Cause
Rectification
Combustion manager W-FM10
Interpreting lamp signals
Off
No heat request or no voltage supply
Red
Lockout
Diagnostic codes
to limit probable
causes: (press reset-button
approx. 5 seconds)
2 x flashes
no flame at end of safety time
3 x flashes
bridging plug X3:12 missing
4 x flashes
flame simulation/ extraneous light
6 x flashes
servomotor error
4 flame failure during
one operation phase:
7 x flashes
flame failure at partial load
9 x flashes
flame failure at full load
10 x flashes
no specific error code
by pressing reset (approx. 1 sec.)
the flashing code list in the internal
memory is deleted
Flashing red/green
Extraneous light
Find cause and rectify
(lockout after 24 secs.)
Flashes 3 x red/orange
Over-voltage
Check external voltage supply
then short pause
Flashes orange/red
Low voltage or Internal F7 fuse
Check external voltage
has blown
Replace fuse (Ch. 7.13)
Flashing green
Burner operation with low flame signal
Check burner setting or flame sensor
soiled
Limit values:
Short circuit recognition in sensor circuit: <2 k
Ω
corresponds to >110µA
Response limit for extraneous light:
<15µA
Response limit for operation:
>30µA
Recommended monitoring current range: 40 bis 100µA
Max. attainable sensor current:
approx. 120µA
Flashing red
Optical data transfer activated (not used) Press reset button > 5 secs.
combustion manager changes to
diagnostic code or operating mode
