ESIE13-02
Error Codes: Gas Condensing Boiler
91
Part 4 – Troubleshooting
4
3
4
5
4
2.4.4
No heating (CH)
2.4.5
Symptom: No space heating
Room thermostat / weather-dependent
adjustment not closed or faulty.
Yes
Check the wiring. Replace the thermo-
stat. Replace the weather-dependant
adjustment.
Possible causes:
Solution:
No
No current (24 V).
Yes
Check the wiring against the diagram.
Check the connector X4. Replace the
faulty manager.
No
Pump not running.
Yes
Check the power supply. Check con-
nector X2. Replace faulty pump.
Replace faulty manager.
No
Burner not firing on CH: sensor S1 or
S2 faulty.
Yes
Replace sensor S1 or S2. See fault
code, temperature display: 1 or 2.
No
Burner does not ignite.
Yes
See burner does not ignite.
Possible causes
Corrective action
Heat pump error.
Check the user interface.
Communication problem with the heat pump.
Make sure the communication cable is properly
installed.
Incorrect heat pump settings.
Check the settings in the heat pump manual.
The service display displays "_", the gas boiler is
switched off.
Switch on the gas boiler with
f
.
No current (24 V).
Check the wiring.
Check the connector X4.
Replace the faulty pump.
The burner does NOT fire on space heating:
sensor S1 or S2 faulty.
Replace sensor S1 or S2. See "Error codes of
the gas boiler" on page 87.
Burner does NOT ignite.
See "2.4.1-Burner does not ignite" on page 89.
