Symptom: The Burner Ignites Noisily; Symptom: The Burner Resonates; Symptom: No Space Heating By The Gas Boiler; Symptom: The Power Is Reduced - Daikin Altherma EHYKOMB33AA Installations- Und Bedienungsanleitung

15 Troubleshooting
15.3.2

Symptom: The burner ignites noisily

Possible causes
Gas supply pressure too high.
Incorrect ignition gap.
Gas/air adjustment NOT correctly
set.
Weak spark.
a Spark gap (±4.5 mm)
15.3.3

Symptom: The burner resonates

Possible causes
Gas supply pressure too low.
Recirculation of combustion
gasses.
Gas/air adjustment NOT correctly
set.
15.3.4 Symptom: No space heating by the gas
boiler
Possible causes
Heat pump error
Communication problem with the
heat pump.
Incorrect heat pump settings.
The service display displays " ",
the gas boiler is switched off.
No current (24 V)
The burner does NOT fire on
space heating: sensor S1 or S2
faulty.
Burner does NOT ignite.
15.3.5

Symptom: The power is reduced

Possible causes
At high rpm, the power has fallen
by more than 5%.
Installation and operation manual
38
Corrective action
The house pressure switch may
be faulty. Contact the gas
company.
▪ Replace the ignition pin.
▪ Check the ignition electrode
gap.
Check the setting. See "To check
the CO₂ setting" [ 4 33].
Check the ignition gap.
Replace the ignition electrode.
Replace the ignition unit on the
gas valve.
a
Corrective action
The house pressure switch may
be faulty. Contact the gas
company.
Check the flue gas and the air
supply.
Check the adjustment. See "To
check the CO₂ setting" [ 4 33].
Corrective action
Check the user interface.
Make sure the communication
cable is properly installed.
Check the settings in the heat
pump manual.
Switch on the gas boiler with .
▪ Check the wiring.
▪ Check the connector X4.
Replace sensor S1 or S2. See
"Error codes of the gas
boiler" [ 4 39].
See "15.3.1 Symptom: The
burner does NOT ignite" [ 4 37].
Corrective action
▪ Check the appliance and flue
system for fouling.
▪ Clean the appliance and flue
system.
15.3.6 Symptom: Space heating does NOT reach
the temperature
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 fouling in the heat
exchanger.
15.3.7

Symptom: No domestic hot water

Not applicable for Switzerland
Possible causes
The burner is NOT firing on
domestic hot water: S3 faulty.
The burner does NOT ignite.
15.3.8 Symptom: Hot water does NOT reach the
temperature (no tank installed)
Not applicable for Switzerland
Possible causes
Domestic hot water flow is too
high.
Temperature setting for water
circuit is too low.
No heat transfer as a result of
lime scale or fouling in the heat
exchanger domestic hot water
side.
Cold water temperature <10°C.
The domestic hot water
temperature fluctuates between
hot and cold.
15.4 Solving problems based on error
codes
If the unit runs into a problem, the user interface displays an error
code. It is important to understand the problem and to take
measures before resetting an error code. This should be done by a
licensed installer or by your local dealer.
This chapter gives you an overview of all possible error codes and
their descriptions as they appear on the user interface.
For detailed troubleshooting of each error, see the service manual.
Daikin Altherma hybrid heat pump – gas boiler module
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 "Maximum
space heating power
setting" [ 4 32].
Descale or flush the heat
exchanger on the space heating
side.
Corrective action
Replace S3.
See "15.3.1 Symptom: The
burner does NOT ignite" [ 4 37].
Corrective action
Adjust the inlet assembly.
Increase the domestic hot water
setpoint on the domestic hot
water homepage of the user
interface.
Descale or flush the exchanger
domestic hot water side.
The water inlet temperature is
too low.
▪ The flow is too low. To
guarantee comfort, a minimum
water flow of 5 l/min
recommended.
▪ Increase the domestic hot
water setpoint on the domestic
hot water homepage of the
user interface.
EHYKOMB33AA
4P353067-1L – 2022.09
is