Immergas HERCULES Condensing 26 2 E Manual page 68

Technical Documentation
ERROR 16
24 VDC is present to clamps 1-2 of the connector X7.
16
The wiring between the P.C.B. and fan is OK.
a
Replace the fan. If the anomaly persists, replace the P.C.B.
The wiring between the P.C.B. and fan is OK.
16 Check continuity of the cables on clamps 3-4-5 of the connector X7.
b
Replace the fan. If the anomaly persists, replace the P.C.B.
ERROR 20
The detection electrode and the relative wiring are integral.
20
Replace the P.C.B.
ERROR 23
The resistance (R9) is present on the connector X9 clamps 8-9 of
the P.C.B.
23
Replace the P.C.B.
ERROR 24
The buttons on the control panel function regularly (check that a
"click" is heard when the button is pressed).
24
Replace the display board.
ERROR 27
The boiler pump functions correctly.
The pump/s functions correctly.
Any CH system zone valve or cut-off cocks are open.
27
The NTC flow probe is OK (10 kΩ at 25°C).
Check/clean/replace the main heat exchanger (condensation module).
If the anomaly persists, replace the P.C.B.
STHCkW ed 0409
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Fan anomaly
Replace the P.C.B.
No
Restore the electric connection/replace the wiring.
No
Restore the electric connection/replace the wiring.
No
Parasite flame block
Check/replace detection electrode/replace wiring.
No
Return probe anomaly
Breakage of the return probe resistance (the anomaly does not affect boiler
functioning.
Restore/replace the electric resistance (2.2 kΩ 1/4 W).
No
Push button control panel anomaly
Check that there are no keys blocked or jammed under the control
No
panel.
Insufficient circulation
See section B
No
See section G
No
Restore circulation in the CH system by acting on the closed devices
and also check:
- the correct functioning of the boiler by-pass;
No
- the opening times of any zone valve (on requirement it is possible to delay
ignition of the burner by acting on the boiler TIMER RT parameter);
- the correct functioning of any thermostatic valves.
Replace NTC probe.
No
66
Technical Documentation
HERCULES Condensing Export