13 Glossary
Installation and operation manual
36
EHYKOMB33A
Daikin Altherma hybrid heat pump – gas boiler module
4P353067-1K – 2020.10
12.3.6
Symptom: Space heating does NOT reach
the temperature
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.
28].
No heat transfer as a result of
lime scale or fouling in the heat
exchanger.
Descale or flush the heat
exchanger on the space heating
side.
12.3.7
Symptom: No domestic hot water
Not applicable for Switzerland
Possible causes
Corrective action
The burner is NOT firing on
domestic hot water: S3 faulty.
Replace S3.
The burner does NOT ignite.
35].
12.3.8
Symptom: Hot water does NOT reach the
temperature (no tank installed)
Not applicable for Switzerland
Possible causes
Corrective action
Domestic hot water flow is too
high.
Adjust the inlet assembly.
Temperature setting for water
circuit is too low.
Increase the domestic hot water
setpoint on the domestic hot
water homepage of the user
interface.
No heat transfer as a result of
lime scale or fouling in the heat
exchanger domestic hot water
side.
Descale or flush the exchanger
domestic hot water side.
Cold water temperature <10°C.
The water inlet temperature is
too low.
The domestic hot water
temperature fluctuates between
hot and cold.
▪ The flow is too low. To
guarantee comfort, a minimum
water flow of 5 l/min is
recommended.
▪ Increase the domestic hot
water setpoint on the domestic
hot water homepage of the
user interface.
12.4
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.
12.4.1
Error codes: Overview
Error codes of the gas boiler
The controller on the gas boiler detects faults and indicates them on
the display by error codes.
If the LED is flashing, the controller has detected a problem. Once
the problem is rectified, the controller can be restarted by pressing
the button.
Following table shows a list of error codes and the possible
solutions.
Error
code
Cause
Possible solution
10, 11,
12, 13,
14
Sensor fault S1
▪ Check wiring
▪ Replace S1
20, 21,
22, 23,
24
Sensor fault S2
▪ Check wiring
▪ Replace S2
0
Sensor fault after
self-check
Replace S1 and/or S2
1
Temperature too
high
▪ Air in installation
▪ Pump is NOT running
▪ Insufficient flow in installation
▪ Radiators are closed
▪ Pump setting is too low
2
S1 and S2
interchanged
▪ Check cable set
▪ Replace S1 and S2
4
No flame signal
▪ Gas tap is closed
▪ No or incorrect ignition gap
▪ Gas supply pressure is too low or
fails
▪ Gas valve or ignition unit is NOT
powered
5
Poor flame signal
▪ Condensate drain blocked
▪ Check adjustment of gas valve
6
Flame detection
fault
▪ Replace ignition cable and spark
plug cap
▪ Replace ignition unit
▪ Replace boiler controller
8
Incorrect fan speed ▪ Fan catching on casing
▪ Wiring between fan and casing
▪ Check wiring for poor wire contact
▪ Replace fan
29, 30
Gas valve relay
fault
Replace boiler controller
13
Glossary
Dealer
Sales distributor for the product.
