Gas fired igniter ZA0 / ZDA0
Troubleshooting
- 52 -
Status: 11-2018
Fault
Possible cause
Solution
To be done by
Combustion air contaminated
If necessary use a filter or
clean/replace existing filter
Qualified
personnel
No gas available, as gas supply
line closed
Check function and position of
all gas valves in the gas supply
line. Reset safety shut-off valve
if necessary
Gas specialist/
owner
The flame comes on
for a short time, but
trips once the ignition
safety time has
elapsed
Flame rod is burned out,
deformed or has short circuited
Exchange the flame rod and
bend back to original position
Clean any scale/internal burner
parts
Qualified
personnel
Ceramic insulator of flame rod
broken
Exchange ceramic insulator or
electrode support ring
Qualified
personnel
When switched together with
the Hegwein control unit,
operating voltage is enabled at
the same time as the bias
voltage
As the operating voltage must
lag behind the bias voltage by
at least 5 s, always leave the
bias voltage switched on
Qualified
electrician
When using control unit from a
different manufacturer, the
ignition spark always disturbs
the ionization feedback
Switch off ignition voltage
approx. 0.5 s before expiry of
the ignition safety time
Qualified
electrician
Gas fired igniter was exposed
to excessively high temperature
in the combustion chamber
when switched off. Ceramic
insulators too hot, the insulation
resistance has dropped too far
Leave fan air running when the
gas fired igniter is switched off
for cooling purposes
Qualified
personnel
The setting of the gas and air
operating pressures at the gas
fired igniter is not correct, flame
root not in the area of the flame
rod
Check settings and correct
Qualified
personnel
Wrong connection
Check complete wiring, carry
out electrical function test
Qualified
electrician
Ionisation flame monitor
defective
Carry out electrical function
test, exchange ionisation flame
monitor
Manufacturer/
Qualified
electrician
