Cuenod C43 GX207/8, Operating Instruction

Page: 14 / 40

04/2008 - Art. Nr. 13 021 970A 14
Troubleshooting
Check the following if failure
occurs:
- power supply (power and control),
- fuel supply (pressure and valve
opening),
- control components,
If problem persists:
• Check light signals of control unit and
their symbols described in table
herebelow.
To find out what other information shown
by the unit mean, specific equipment is
available and is suited to the SG 513
unit.
Safety components must not be repaired
but replaced by similar items.
Only use manufacturer spare parts .
Note:
After each operation:
• Check combustion and all circuits for
possible leaks.
• Perform safety checks.
• Record results in the relevant
documents.
Symbol Fault Cause Corrective action
Burner stops
Nothing happens
Normal gas pressure
Thermostatic chain
Insufficient gas pressure
Misadjusted or faulty gas pressure switch
Foreign body in pressure take-off pipe
Misadjusted or faulty thermostats
Adjust distribution pressure
Clean filter
Check or replace gas pressure switch
Clean pressure take-off pipes
(without pressurized fluid)
Adjust or replace thermostats
Burner does not start after thermostatic
closure.
Unit does not signal any fault. Low or no power supply
Faulty unit
Check source of low or missing voltage
Change unit
Burner starts, when powered up, for a short
time then stops and shows this signal
-
Unit voluntarily stopped Reset unit
Unit on Air pressure switch: contact is welded Change or adjust pressure switch
Unit on Air pressure switch: contact does not close
Air pressure switch: contact opens during start
up or operation
Check pressure take-off (foreign body) and
wiring
Adjust, change pressure switch
Unit on Spurious light during the pre-ignition phase Check valve tightness or change it
Unit on No flame signal at end of safety time
Unsuitable gas flow stage
Faulty flame monitoring circuit
No ignition arc
Ignition electrode(s) short-circuiting
Damaged or faulty ignition cable(s)
Faulty ignition transformer
Control unit
Electromagnetic valves do not open
Mechanical jamming in valves
Adjust gas flow stage
Check state and position of ionization probe in
relation to mass.
Check state and connections of ionization
circuit (cable and measuring bridge).
Adjust, clean or replace electrodes
Connect or replace cable(s)
Replace ignition transformer
Change control unit
Check wiring between unit, servomotor and
valves
Check, change coil
Change valve
Unit on Flame disappears while in operation Check ionization probe circuit
Check or change control unit