Mark GST/RE Technisches Handbuch Seite 10

6.0 Trouble-shooting diagram
Is a 230V or 380V
no
power supply pre-
sent between termi-
nals N and L?
yes
Is a power supply
no
present between
terminals 13 and N?
yes
Is a power supply
no
present between
terminals 14 and 16?
yes
Is 230V or 380V
present between
no
terminal CN1-6 and
terminal CN1-7 of
the automatic urner?
yes
Does the flue gas fan
no
turn?
yes
Does the pneumatic
no
switch come up?
yes
Is ignition achieved
no
after flushing out for
up to 60 seconds?
yes
Is a flame produced?
no
yes
10
Check the (main) Does the flame burn
fuse plus the continuously?
operating switch,
if present.
Room thermostat
circuit has been
interrupted (between
terminals 3 and 2)
Isolating transformer
defect (if applicable)
1 Max. thermostat or safety
Burner is
thermostat has been
operational.
interrupted either due to
interlocking or else
because it is defective.
(See the technical manual.)
2 Glass fuse is defective.
3 Locks the filter pressure
switch (where applicable).
Does the lamp in the Is the pneumatic
no
reset button light up? switch in the off
position?
yes
Automatic is inter- Flue gas fan or relay
locked; check wiring K1 is defective.
for the reset lamp
and reset button.
1 Air pressure pipes
are blocked or in
incorrect position.
2 Excessive resi-
stance along flue
piping
Does the reset lamp Check connections
no
light up? to the reset lamp
and reset button.
yes
1 Ignition cable is disconnected.
2 Ignition electrode is dirty or not
properly in place.
3 Automatic burner is defective
1 no gas
1 Automatic burner
2 air in the gas
yes
3 Pilot valve (MK) 2 Gas valve is
does not open.
yes
Is the heater mal-
no
functioning?
Have phase and
neutral been
swapped around?
yes
Check wiring and
adjustment of the
ionisation pin.
1 Air pressure pipes
no
are blocked.
2 Pneumatic
switch is defective.
yes
is defective
defective.
The flame is going
no
out due to the incor-
rect mounting or
type of flue gas
system.
yes
Has the equipment
no
been properly
earthed?
yes
Is the ionisation
no
current above 1,5
µA?
yes
Automatic burner is
defective.