05/2005 - Art. Nr. 13 018 106A
50
In the event of faults, first check the
basic requirements for normal
operation:
·
Is there any current?
·
Is there any gas pressure? Do the
valves open?
·
Are all control devices set correctly?
·
Are the control panel switches set
correctly?
If the fault persists, check the
programme position on the control and
safety unit.
Do not repair safety components, they
must be replaced with identical
components. Use only original
spare
parts.
Important: After each intervention
·
Check the exhaust gas values.
·
Enter the measurement values in
the appropriate records.
Troubleshooting
Gas
Symbol
Fault
Cause
Corrective action
w
Burner remains on programme symbol, no
start
Gas pressure normal
Insufficient gas pressure
Gas pressure switch defective or min.
value wrongly set
Air pressure switch locked in “On” position
Adjust the gas connection pressure
Clean the gas filter
Check, adjust or replace the gas pressure
switch
Replace air pressure switch
w
Burner in fault mode,
programme symbol
Parasitic flame on control system
shut-down
Check gas valves for leaks
Add reventilation to programme
P
Programme symbol “P”
Motor does not start. Switch in “Off”
position
Motor does not start.
Switch in “On” position
Motor starts
Air pressure switch defective
Protection switch triggered
Switch defective
Wiring problem between switch and motor
Motor defective
Air pressure switch defective or wrongly set
Replace air pressure switch
Unlock, reset or replace protection devices
Replace switch
Check the wiring
Replace the motor
Reset or replace air pressure switch
z
Programme symbol
Fault in flame monitoring system
Clean flame monitor
Replace control and safety unit
1
1
x
oder
v
Programme symbol “1"
No ignition
Valves do not open
Flame head
Flame appears, but pulsates and
goes out (flame monitor signal
too weak)
Burner stays on preventilation
operation with no flame
Programme symbol
Programme symbol
Other faults
Fault shut-down at any time with no
programme symbol
Restart attempt by control and safety unit
without fault shut-down
Ignition electrodes short-circuited
Ignition cable defective
Ignition transformer defective
Control and safety unit defective
Break in electrical connection
Solenoid(s) short-circuited
Valve or ratio regulator jammed
Flame head wrongly set
Too much air or gas
Servomotor defective
Air flap jammed
Mechanical coupling defective
Parasitic flame at start-up
Gas pressure switch wrongly set or
defective
Set or replace electrodes
Replace ignition cable
Replace ignition transformer
Replace control and safety unit
Check wiring between control and safety
unit, servomotor and ratio regulator
Replace solenoid(s)
Replace valve or regulator
Set flame head correctly
Set air flap and gas flow correctly
Set or replace servomotor
Free air flap
Inspect or replace coupling
Replace control and safety unit
Reset or replace gas pressure switch.
