Maintenance Gas - Cuenod C 75 Instrucciones De Montaje

Gas maintenance
· Check the following if failure occurs:
–
power supply (power and control),
–
fuel supply (valve pressure and
opening),
–
control components,
–
switch positions on TC control
panel.
Symbol Fault
w
Burner stops in position.
nothing happens.
Normal gas pressure.
With leakage test.
w
Burner on safety lockout.
in position
in " P " position
P
Motor not working. Contactor is open.
Motor not working.
Contactor closed.
Motor working.
z
in position
in " 1 " position
1
No ignition arc
Electromagnetic valves not opening
Combustion head.
Flame appears, but is unstable or goes
out (insufficient cell current).
Burner on continuous ventilation but no
flame.
I in " I " position
x
on
or
v
on
Other incidents
Sudden lockout at any time, not
indicated by any symbol.
Control and safety unit recycle without
safety lockout.
If problem persists:
· Check various program symbols
described here below on the control
and safety unit.
Safety components must not be
repaired but replaced by similar items.
m
Only use
manufacturer spare parts.
Cause
Insufficient gas pressure.
Misadjusted or faulty gas pressure switch.
Closed gas pressure switch (welded
contact).
Leak test unit lockout.
Leak test unit power of.f
Parasitic flame on thermostatic cut-off.
Faulty air pressure.
Thermal relay cut out.
Faulty contactor.
Faulty wiring between contactor and motor
Faulty motor.
Misadjusted or faulty air pressure switch.
Faulty flame monitoring circuit.
Ignition electrode(s) short-circuiting.
Damaged ignition cable(s).
Faulty ignition transformer.
Control and safety unit.
Electrical connections broken.
Coil(s) short-circuiting.
Mechanical jamming in valves or
proportional regulator.
Misadjusted combustion head.
Air flap too open and/or gas flow too high.
Faulty servomotor.
Mechanical jamming of air flap.
Faulty mechanical coupling.
Premature flame signal.
Old cell.
Misadjusted or faulty gas pressure switch.
06/2006 - Art. Nr. 13 013 497B
Note
After each operation:
· Check combustion and all circuits
for possible leaks.
· Perform safety checks.
· Record results in the relevant
documents.
Corrective action
Adjust distribution pressure.
Clean filter.
Adjust or replace gas pressure switch.
Replace air pressure switch.
Unlock or change valve.
Check, change fuse.
Check gas valve air-tightness.
Fit a postventilation device.
Replace air pressure switch.
Reset, adjust or change thermal relay.
Change contactor.
Check wiring.
Replace motor.
Adjust or replace air pressure switch.
Check pressure pipes.
Check cell.
Change control and safety unit.
Adjust or replace electrodes.
Replace ignition cables.
Replace ignition transformer.
Change control unit.
Check wiring between unit, servomotor and
valve.
Change coil(s).
Change valve.
Adjust combustion head.
Adjust air flap or gas flow rate.
Adjust or change servomotor.
Unblock air flap.
Check or change coupling.
Change control and safety unit.
Change cell.
Adjust or replace gas pressure switch.
EN
47