Daikin EHYHBH05AAV3, Service Manual

Page: 92 / 170

Error Codes: Gas Condensing Boiler ESIE13-02A
Part 4 – Troubleshooting 92
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2.4.6 Symptom: The power is reduced
2.4.7 Symptom: Space heating does NOT reach the temperature
2.4.8 Symptom: No domestic hot water
Possible causes Corrective action
At high rpm, the power has fallen by more than
5%. Check the appliance and flue system for
fouling.
Clean the appliance and flue system.
Possible causes Corrective action
Weather-dependent setpoint setting is incorrect. Check the setting on the user interface and
adjust if necessary.
Temperature is too low. Increase the space heating temperature.
No circulation in the installation. Check whether there is circulation. At least 2 or
3 radiators MUST be open.
The boiler power has NOT been correctly set for
the installation. Adjust the power. See installation and operation
manual "HPU hybrid gas boiler module".
No heat transfer as a result of lime scale or foul-
ing in the heat exchanger. Descale or flush the heat exchanger on the
space heating side.
Possible causes Corrective action
No current at the flow switch (5 V DC). Check the wiring according to the diagram.
The burner is NOT firing on domestic hot water:
S3 faulty. Replace S3.
The burner does NOT ignite. See "2.4.1-Burner does not ignite" on page 89.