Table of Contents
Error Codes: Gas Condensing Boiler
2.4.6
Symptom: The power is reduced
1
2.4.7
Symptom: Space heating does NOT reach the temperature
3
4
5
2.4.8
Symptom: No domestic hot water
Part 4 Troubleshooting
Possible causes
At high rpm, the power has fallen by more than
5%.
Possible causes
Weather-dependent setpoint setting is incorrect.
Temperature is too low.
No circulation in the installation.
The boiler power has NOT been correctly set for
the installation.
No heat transfer as a result of lime scale or foul-
ing in the heat exchanger.
Possible causes
No current at the flow switch (5 V DC).
The burner is NOT firing on domestic hot water:
S3 faulty.
The burner does NOT ignite.
Corrective action
Check the appliance and flue system for
fouling.
Clean the appliance and flue system.
Corrective action
Check the setting on the user interface and
adjust if necessary.
Increase the space heating temperature.
Check whether there is circulation. At least 2 or
3 radiators MUST be open.
Adjust the power. See installation and operation
manual "HPU hybrid gas boiler module".
Descale or flush the heat exchanger on the
space heating side.
Corrective action
Check the wiring according to the diagram.
Replace S3.
See "2.4.1-Burner does not ignite" on page 89.
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ESIE13-02A
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Troubleshooting
