Immergas MAIOR EOLO 24 4 E, Technical Documentation Manual

Page: 47 / 52

45
STMaE4E and 07/11 MAIOR EOLO 4 E
Technical Documentation Technical Documentation
Error codes
ERROR 01
No ignition block
01
a
The ignition transformer discharges. No Replace the P.C.B.
Yes
The wiring between the ignition electrode and P.C.B. is OK. No Restore/replace the ignition electrode and relative wiring.
Yes
Check the correct position and correct distance of the ignition electrode and replace it if necessary.
01
b
230 V DC are present on clamps 1-2 of connector X7.
N.B:
measure the voltage within the safety time (8-10 s).
No Replace the P.C.B.
Yes
The connectors and relative wiring between gas valve and P.C.B.
are OK.
No
Restore the electric connection/replace the wiring.
Yes
The main coils of the gas valve are OK.
No
Where possible, replace the main coils of the gas valve.
Yes
The position and the distance of the ignition electrode with respect
to the burner is OK.
No Restore the position and the distance of the ignition electrode.
Yes
Replace the gas valve.
N.B.: before replacing the valve make sure that there is enough gas inlet dynamic pressure and that the gas valve is correctly calibrated.
01
c
The electrode detects a direct current of 6-8 µA during the burner
ignition phase.
No Replace the detection electrode and/or relative wiring.
Yes
Replace the P.C.B.
ERROR 02
Over-heating safety thermostat block
02
a
The wiring between the safety thermostat and P.C.B. is OK. No Restore the electric connection/replace the wiring.
Yes
Check/replace the safety thermostat. If the anomaly persists, replace the P.C.B.
02
b
The safety thermostat functions regularly (intervention temperature
higher than 100°C).
No
Replace the over-heating safety thermostat.
Yes
The boiler pump functions correctly.
N.B.: make sure that the pump functions at maximum speed.
No See section B
Yes
Any CH system zone valve or cut-off cocks are open. No
Restore circulation in the CH system by acting on the closed devices
and also check:
- the correct positioning/functioning of the boiler by-pass;
- the opening times of any zone valves (when necessary, it is possible
to delay ignition of the burner by acting on the boiler "t2" parameter);
- the correct functioning of any thermostatic valves.
Yes
The NTC flow probe is OK (10 kΩ at 25°C). No Replace NTC probe.
Yes
Check/clean/replace the main heat exchanger.