Symptom: Space Heating Does Not Reach The Temperature; Symptom: No Domestic Hot Water; Symptom: Hot Water Does Not Reach The Temperature (No Tank Installed); Solving Problems Based On Error Codes - Daikin EHYKOMB33AA Installation And Operation Manual

13 Glossary

12.3.6 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.
12.3.7

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.
12.3.8 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.
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.
Installation and operation manual
36
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 28].
Descale or flush the heat
exchanger on the space heating
side.
Corrective action
Replace S3.
See "12.3.1 Symptom: The
ignite" [ 4 35].
burner does NOT
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.
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 Cause
code
10, 11, Sensor fault S1
12, 13,
14
20, 21, Sensor fault S2
22, 23,
24
0 Sensor fault after
self-check
1 Temperature too
high
2 S1 and S2
interchanged
4 No flame signal
5 Poor flame signal
is
6 Flame detection
fault
8 Incorrect fan speed ▪ Fan catching on casing
29, 30 Gas valve relay
fault
13 Glossary
Dealer
Sales distributor for the product.
Daikin Altherma hybrid heat pump – gas boiler module
Possible solution
▪ Check wiring
▪ Replace S1
▪ Check wiring
▪ Replace S2
Replace S1 and/or S2
▪ Air in installation
▪ Pump is NOT running
▪ Insufficient flow in installation
▪ Radiators are closed
▪ Pump setting is too low
▪ Check cable set
▪ Replace S1 and S2
▪ 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
▪ Condensate drain blocked
▪ Check adjustment of gas valve
▪ Replace ignition cable and spark
plug cap
▪ Replace ignition unit
▪ Replace boiler controller
▪ Wiring between fan and casing
▪ Check wiring for poor wire contact
▪ Replace fan
Replace boiler controller
EHYKOMB33A
4P353067-1K – 2020.10