Table of Contents
a
Spark gap (±4.5 mm)
13.3.13 Symptom: The burner resonates
Possible causes
Gas supply pressure too low.
Recirculation of combustion
gasses.
Gas/air adjustment NOT correctly
set.
13.3.14 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.
13.3.15 Symptom: The power is reduced
Possible causes
At high rpm, the power has fallen
by more than 5%.
13.3.16 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.
EVLQ05+08CAV3 + EHYHBH05AA + EHYHBH/X08AA +
EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1C – 2018.06
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 carbon dioxide
setting" on
page 82.
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" on
page 100.
See
"13.3.11 Symptom: The
burner does NOT ignite" on
page 96.
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
"Maximum
space heating power setting" on
page 81.
Possible causes
No heat transfer as a result of
lime scale or fouling in the heat
exchanger.
13.3.17 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.
13.3.18 Symptom: Hot water does NOT reach the
temperature (tank installed)
Possible causes
The gas boiler has an error code. Check the display of the gas
The indoor unit has an error
code.
The 3-way valve is not working
correctly.
13.4
Solving problems based on error
codes
When a problem happens, an error code appears on the user
interface. 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 error codes and the
content of the error code as it appears on the user interface.
For a more detailed troubleshooting guideline for each error, please
see the service manual.
13 Troubleshooting
Corrective action
Descale or flush the heat
exchanger on the space heating
side.
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.
Corrective action
boiler for more information.
Check for possible errors on the
indoor unit.
▪ Check the installation of the 3-
way valve.
▪ In case of domestic hot water
operation, the flow should be
directed to the tank.
Installer reference guide
97
is
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